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$498+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BKK
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$908
(Mytrip)

One-way from

$498
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$1,410
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. 11% potential increase in price ($163 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($43 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/10. 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.
Sun 9/146:26 amBWI - BKK
2 stops28h 59mMultiple Airlines
Sat 9/2011:20 pmBKK - BWI
2 stops32h 42mMultiple Airlines
Deal found 6/10$905
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/18:00 amDCA - BKK
2 stops28h 05mUnited Airlines
Fri 12/129:25 amBKK - DCA
2 stops23h 13mUnited Airlines
Deal found 6/10$977
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/76:32 amIAD - BKK
2 stops30h 23mUnited Airlines
Fri 7/189:35 amBKK - IAD
2 stops31h 27mUnited Airlines
Deal found 6/10$977
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/227:59 amDCA - BKK
2 stops28h 26mDelta
Tue 8/1211:30 pmBKK - DCA
2 stops26h 20mDelta
Deal found 6/11$978
This Gurufare deal was found by Cheapflights users on 6/12. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/191:30 pmIAD - BKK
1 stop22h 55mKorean Air
Mon 8/252:35 amBKK - IAD
2 stops31h 46mKorean Air
Deal found 6/12$978
This CheapOair deal was found by Cheapflights users on 6/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/248:30 pmDCA - BKK
2 stops37h 00mKorean Air
Wed 12/241:00 amBKK - DCA
2 stops34h 00mKorean Air
Deal found 6/11$984
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/265:50 pmIAD - BKK
2 stops42h 30mDelta
Tue 11/49:30 pmBKK - IAD
2 stops37h 45mDelta
Deal found 6/10$984
This oojo deal was found by Cheapflights users on 6/12. 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.
Thu 9/119:00 pmIAD - BKK
1 stop22h 15mQatar Airways
Mon 9/222:30 amBKK - IAD
1 stop24h 10mQatar Airways
Deal found 6/12$986
This Booking.com deal was found by Cheapflights users on 6/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/58:20 amIAD - BKK
2 stops28h 35mANA
Wed 10/299:25 amBKK - IAD
1 stop35h 45mANA
Deal found 6/11$995
This Mytrip deal was found by Cheapflights users on 6/11. 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.
Sat 9/132:00 pmDCA - BKK
2 stops27h 35mANA
Tue 9/309:35 pmBKK - DCA
2 stops27h 41mANA
Deal found 6/11$997
This oojo deal was found by Cheapflights users on 6/11. 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.
Mon 8/116:58 pmDCA - BKK
2 stops30h 12mChina Airlines
Sun 8/242:40 amBKK - DCA
2 stops50h 19mChina Airlines
Deal found 6/11$1,004
This IEagle deal was found by Cheapflights users on 6/12. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/199:00 amBWI - BKK
2 stops27h 25mKorean Air
Wed 9/1711:30 pmBKK - BWI
2 stops28h 11mKorean Air
Deal found 6/12$1,004

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 June 12, 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

BaltimoreBangkok

BWI - BKK

BWIBKK

Baltimore/Washington

Tue 8/19

6:26 am-11:10 pm

2 stops29h 44m

Bangkok Suvarnabhumi

Mon 8/25

1:20 am-9:02 pm

2 stops30h 42m

$908

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Mon 12/1

8:00 am-12:05 am

2 stops28h 05m

Bangkok Suvarnabhumi

Fri 12/12

9:25 am-8:38 pm

2 stops23h 13m

$977

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Mon 7/7

6:32 am-11:55 pm

2 stops30h 23m

Bangkok Suvarnabhumi

Fri 7/18

9:35 am-6:02 am

2 stops31h 27m

$977

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Tue 7/22

7:59 am-11:25 pm

2 stops28h 26m

Bangkok Suvarnabhumi

Tue 8/12

11:30 pm-2:50 pm

2 stops26h 20m

$978

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Tue 8/19

1:30 pm-11:10 pm

1 stop22h 40m

Bangkok Suvarnabhumi

Wed 9/17

2:35 am-12:07 am

2 stops32h 32m

$978

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Sun 11/2

5:10 pm-11:20 pm

2 stops42h 10m

Bangkok Suvarnabhumi

Thu 11/27

1:00 am-4:31 pm

2 stops27h 31m

$979

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Mon 11/24

8:30 pm-9:30 pm

2 stops37h 00m

Bangkok Suvarnabhumi

Wed 12/24

1:00 am-11:00 pm

2 stops34h 00m

$984

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Sun 10/26

5:50 pm-11:20 pm

2 stops42h 30m

Bangkok Suvarnabhumi

Mon 11/3

1:00 am-11:34 pm

2 stops34h 34m

$984

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Thu 9/11

9:00 pm-6:15 am

1 stop22h 15m

Bangkok Suvarnabhumi

Mon 9/22

2:30 am-3:40 pm

1 stop24h 10m

$986

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Sun 10/5

8:20 am-11:55 pm

2 stops28h 35m

Bangkok Suvarnabhumi

Wed 10/29

9:25 am-10:10 am

1 stop35h 45m

$995

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 60 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 June 9, 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 $953). 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 June 12, 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 June 12, 2025.
See what other customers who have flown with EVA Air, Korean Air and Japan Airlines 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.
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,202 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Korean Air
8.4
Very good
1,088 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Japan Airlines
8.3
Very good
1,489 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
China Airlines
8.3
Very good
738 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
ANA
8.3
Very good
882 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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 United Airlines is currently your cheapest option to Bangkok, with prices starting at $977. Additional round-trip tickets that might be worth considering are offered by Delta and Korean Air, with the lowest prices starting at $978 and $979, respectively. Users have found that United Airlines is 21% 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 ANA, which is currently one of the cheapest options available, starting at $536. China Airlines flights start at $538 while deals on United Airlines start at $540 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 $28 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 $40 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 $24 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 Tokyo in terms of the least popular layover location on flights from Washington, D.C. to Bangkok. Tokyo is followed by Jeddah 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 $953). 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

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest$565Average$629FlexibilityNo cancel feeOn-time67%
SAUDIACheapest$596Average$864FlexibilityNo cancel feeOn-time86%
Air IndiaCheapest$700Average$841FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$854Average$1,303FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$856Average$1,690FlexibilityNo cancel feeOn-time81%
ANACheapest$913Average$1,635FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$916Average$1,048FlexibilityNo cancel feeOn-time77%
Etihad AirwaysCheapest$922Average$1,149FlexibilityNo cancel feeOn-time75%
DeltaCheapest$928Average$1,485FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$936Average$1,401FlexibilityNo cancel feeOn-time75%

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