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$525+ Cheap flights from Washington, D.C. (WAS) to Bangkok

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BKK
Apr 10 — Apr 171
Thu 4/10
Thu 4/17
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. to Bangkok are usually found in September or October, booked 85 days in advance, depart on a Saturday or Tuesday and return on a Sunday

Cheap flight deals from Washington, D.C. to Bangkok

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Bangkok (TH1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 5, 2025.

Round-trip from

$973
(Trip.com)

One-way from

$525
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$1,120
From Washington, D.C. (WAS) to Bangkok
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One-way flight from Washington, D.C. (WAS) to Bangkok
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Highest demand for flights based on searches. 8% potential increase in price ($119 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Washington, D.C. to Bangkok

Cheapest flights from Washington, D.C. to Bangkok
Explore the most affordable flight options available from Washington, D.C. to Bangkok. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 5, 2025.

This Trip.com deal was found by Cheapflights users on 4/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1710:05 pmIAD - BKK
1 stop22h 05mEtihad Airways
Tue 5/132:55 amBKK - IAD
1 stop24h 15mEtihad Airways
Deal found 4/4$973
This Mytrip deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/246:10 amBWI - BKK
2 stops30h 00mMultiple Airlines
Wed 5/71:20 amBKK - BWI
2 stops29h 19mMultiple Airlines
Deal found 4/5$976
This Gotogate deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/311:00 pmIAD - BKK
1 stop32h 10mMultiple Airlines
Sat 5/103:25 pmBKK - IAD
2 stops35h 20mMultiple Airlines
Deal found 4/5$990
This StudentUniverse deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/811:54 amDCA - BKK
2 stops24h 56mCathay Pacific
Tue 5/1311:00 amBKK - DCA
2 stops24h 46mCathay Pacific
Deal found 4/5$1,005
This Expedia deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/410:05 pmIAD - DMK
2 stops47h 10mMultiple Airlines
Sat 5/178:15 pmDMK - IAD
2 stops54h 55mMultiple Airlines
Deal found 4/5$1,017
This CrystalTravel deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/131:30 pmIAD - BKK
1 stop28h 45mTurkish Airlines
Thu 10/236:45 amBKK - IAD
1 stop24h 00mTurkish Airlines
Deal found 4/5$1,019
This Justfly.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/38:07 pmIAD - BKK
2 stops49h 28mSingapore Airlines
Wed 9/243:30 pmBKK - IAD
2 stops35h 29mSingapore Airlines
Deal found 4/5$1,026
This oojo deal was found by Cheapflights users on 4/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1911:30 amIAD - BKK
2 stops36h 35mCathay Pacific
Tue 8/265:30 pmBKK - IAD
2 stops33h 29mCathay Pacific
Deal found 4/4$1,045
This FlightHub deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/16:50 pmIAD - BKK
2 stops31h 55mSAUDIA
Tue 5/203:25 pmBKK - IAD
1 stop35h 20mSAUDIA
Deal found 4/5$1,102
This Justfly.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/17:00 pmBWI - BKK
2 stops32h 20mSingapore Airlines
Mon 9/153:30 pmBKK - BWI
2 stops36h 17mSingapore Airlines
Deal found 4/5$1,107
This Kissandfly.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2411:54 amDCA - BKK
2 stops24h 56mMultiple Airlines
Fri 5/95:30 pmBKK - DCA
2 stops35h 02mMultiple Airlines
Deal found 4/5$1,111
This FlightHub deal was found by Cheapflights users on 4/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/301:30 pmIAD - BKK
2 stops39h 25mIndiGo
Thu 5/155:45 pmBKK - IAD
2 stops37h 00mIndiGo
Deal found 4/4$1,113

Cheapflights Fare Finder

Customize your flight search to find flights from Washington, D.C. to Bangkok that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 5, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Bangkok that are best for you.

Fly from

Washington, D.C.

Fly to

Bangkok

Route

Depart

Return

Price

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Thu 4/17

10:05 pm-7:10 am

1 stop22h 05m

Bangkok Suvarnabhumi

Tue 5/13

2:55 am-4:10 pm

1 stop24h 15m

$973

BaltimoreBangkok

BWI - BKK

BWIBKK

Baltimore/Washington

Thu 4/24

6:10 am-11:10 pm

2 stops30h 00m

Bangkok Suvarnabhumi

Wed 5/7

1:20 am-7:39 pm

2 stops29h 19m

$976

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Sat 5/3

11:00 pm-6:10 pm

1 stop32h 10m

Bangkok Suvarnabhumi

Sat 5/10

3:25 pm-3:45 pm

2 stops35h 20m

$990

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Tue 8/19

7:30 pm-10:00 am

2 stops27h 30m

Bangkok Suvarnabhumi

Wed 11/19

5:40 pm-9:29 am

2 stops27h 49m

$1,005

Washington, D.C.Bangkok

IAD - DMK

IADDMK

Washington, D.C. Dulles Intl

Sun 5/4

10:05 pm-8:15 am

2 stops47h 10m

Bangkok Don Mueang Intl

Sat 5/17

8:15 pm-4:10 pm

2 stops54h 55m

$1,017

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Wed 9/3

8:07 pm-8:35 am

2 stops49h 28m

Bangkok Suvarnabhumi

Wed 9/24

3:30 pm-3:59 pm

2 stops35h 29m

$1,026

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Wed 5/14

1:30 pm-3:25 pm

1 stop38h 55m

Bangkok Suvarnabhumi

Wed 5/28

10:45 pm-7:45 pm

1 stop32h 00m

$1,034

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Tue 8/19

11:30 am-11:05 am

2 stops36h 35m

Bangkok Suvarnabhumi

Tue 8/26

5:30 pm-3:59 pm

2 stops33h 29m

$1,045

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Thu 5/1

6:50 pm-1:45 pm

2 stops31h 55m

Bangkok Suvarnabhumi

Tue 5/20

3:25 pm-3:45 pm

1 stop35h 20m

$1,102

BaltimoreBangkok

BWI - BKK

BWIBKK

Baltimore/Washington

Mon 9/1

7:00 pm-2:20 pm

2 stops32h 20m

Bangkok Suvarnabhumi

Mon 9/15

3:30 pm-4:47 pm

2 stops36h 17m

$1,107

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/5

Showing 1-10 of 57 results
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Best time to book a flight from Washington, D.C. to Bangkok

Have a flexible travel schedule? Discover the best time to fly to Bangkok from Washington, D.C. with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Bangkok

How far ahead should I book a flight from Washington, D.C. to Bangkok?

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Bangkok. Price data was last updated on March 28, 2025.

To ensure you get the cheapest price possible for a flight from Washington, D.C. to Bangkok, you should look to book at least 85 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Washington, D.C. to Bangkok?

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to Bangkok (average of $958). Flying from Washington, D.C. to Bangkok in December is currently the most expensive (average of $1,574). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WAS to BKK?

Find hourly flight availability from Washington, D.C. to Bangkok. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 5, 2025.

It’s typically best to fly out from Washington, D.C. to Bangkok in the evening. Doing so could potentially save you 17% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Washington, D.C. to Bangkok?

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Bangkok. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. to Bangkok flight should consider departing on Saturday evenings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Bangkok by month

Plan your trip to Bangkok by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Bangkok ranges from 0.4 - 12.6 inches per month. September is typically the wettest month, when rainfall can reach 12.6 in. January is typically the driest time to visit Bangkok when rainfall is around 0.4 in.

Temperature in Bangkok by month

Plan your trip to Bangkok by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Bangkok, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).

Reviews of airlines servicing Bangkok

Get insights into the airlines that provide service to Bangkok. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bangkok. Reviews last updated April 5, 2025.
See what other customers who have flown with Korean Air, Japan Airlines and ANA from Washington, D.C. to Bangkok have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,052 reviews

Entertainment

8.2

Overall

8.4

Boarding

8.5

Food

8.1

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,052 reviews
Korean Air
8.4
Very good
1,052 reviews

Entertainment

8.2

Overall

8.4

Boarding

8.5

Food

8.1

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Japan Airlines
8.3
Very good
1,441 reviews
Korean Air
8.4
Very good
1,052 reviews

Entertainment

8.2

Overall

8.4

Boarding

8.5

Food

8.1

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
ANA
8.3
Very good
831 reviews
Korean Air
8.4
Very good
1,052 reviews

Entertainment

8.2

Overall

8.4

Boarding

8.5

Food

8.1

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Asiana Airlines
8.2
Very good
438 reviews
Korean Air
8.4
Very good
1,052 reviews

Entertainment

8.2

Overall

8.4

Boarding

8.5

Food

8.1

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Singapore Airlines
8.1
Very good
1,287 reviews
Korean Air
8.4
Very good
1,052 reviews

Entertainment

8.2

Overall

8.4

Boarding

8.5

Food

8.1

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Bangkok. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Washington, D.C. to Bangkok round-trip?

    Flying on Etihad Airways is currently your cheapest option to Bangkok, with prices starting at $973. Additional round-trip tickets that might be worth considering are offered by Cathay Pacific and Singapore Airlines, with the lowest prices starting at $1,005 and $1,026, respectively. Users have found that Etihad Airways is 25% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Washington, D.C. to Bangkok one-way?

    To fly one-way, consider booking your trip with IndiGo, which is currently one of the cheapest options available, starting at $547. Turkish Airlines flights start at $550 while deals on Cathay Pacific start at $556 one-way.

  • What are the most popular routes from Washington, D.C. to Bangkok?

    The most popular flight routes from Washington, D.C. to Bangkok are Washington, D.C. Dulles Intl - Bangkok Suvarnabhumi, Washington, D.C. Reagan-National - Bangkok Suvarnabhumi and Baltimore/Washington - Bangkok Suvarnabhumi.

  • Where are the most common layover locations when flying from Washington, D.C. to Bangkok?

    Of the flights from Washington, D.C. to Bangkok that have layovers, most of them stop in Doha. Istanbul sees the next most layovers on Washington, D.C. to Bangkok flights. Dubai comes in third as the most popular layover location on Washington, D.C. to Bangkok flights.

  • What are some popular things to do or see while on a layover in Doha?

    Museum of Islamic Art, Katara Cultural Village, and Aspire Tower are currently the most popular points of interest in Doha at the moment. Those on a layover in Doha interested in visiting Museum of Islamic Art, Katara Cultural Village, or Aspire Tower can do so by traveling 5.2 mi, 8.7 mi, and 10.6 mi, respectively from Doha Hamad Intl. Those landing in Doha looking to spend some time exploring during their layover can rent a car for about $27 per day.

  • What are some popular points of interest to see during a layover in Istanbul?

    The majority of Istanbul visitors spend their time at Taksim Square, Sultan Ahmet Camii, and Beyazit Meydani. Taksim Square, Sultan Ahmet Camii, and Beyazit Meydani can be visited by traveling about 20.8 mi, 22.3 mi, and 21.7 mi respectively from Istanbul. Travelers in need of a car in Istanbul can rent one for about $28 per day.

  • What are points of interest worth seeing during a layover in Dubai?

    Burj Khalifa, Dubai Mall, and Burj Al Arab are the most popular attractions in Dubai if you're in need of something to do during your layover. Burj Khalifa, Dubai Mall and Burj Al Arab are located about 6.8 mi, 6.5 mi, and 13.6 mi, respectively from Dubai Intl if you are interested in checking them out. Travelers in need of a car in Dubai can rent one for about $26 per day.

  • Where are the least popular layover locations for Washington, D.C. to Bangkok flights?

    Washington, D.C. to Bangkok flights have a layover in Atlanta the least frequently. Atlanta is followed by Abu Dhabi in terms of the least popular layover location on flights from Washington, D.C. to Bangkok. Abu Dhabi is followed by Tokyo in terms of the least popular layover location for Washington, D.C. to Bangkok flights.

  • Can I find deals for flights from Washington, D.C. to Bangkok that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Bangkok flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Bangkok?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Bangkok.

  • Can I find deals for business class flights from Washington, D.C. to Bangkok?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Bangkok by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. to Bangkok?

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to Bangkok (average of $958). Flying from Washington, D.C. to Bangkok in December is currently the most expensive (average of $1,574). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from Washington, D.C. to Bangkok

Discover the top 10 airlines that operate flights from Washington, D.C. to Bangkok. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
SAUDIACheapest$652Average$862FlexibilityNo cancel feeOn-time86%
Air IndiaCheapest$700Average$837FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$921Average$1,092FlexibilityNo cancel feeOn-time77%
Etihad AirwaysCheapest$936Average$1,158FlexibilityNo cancel feeOn-time75%
Alaska AirlinesCheapest$936Average$1,287FlexibilityNo cancel feeOn-time75%
Qatar AirwaysCheapest$952Average$1,178FlexibilityNo cancel feeOn-time68%
JetBlueCheapest$994Average$1,197FlexibilityNo cancel feeOn-time62%
Korean AirCheapest$1,060Average$1,668FlexibilityNo cancel feeOn-time81%
American AirlinesCheapest$1,065Average$1,368FlexibilityNo cancel feeOn-time71%
IndiGoCheapest$1,069Average$1,388FlexibilityNo cancel feeOn-time80%

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