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$386+ 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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BKK
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. to Bangkok are usually found in September or August, 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 September 15, 2025.

Round-trip from

$806
(Mytrip)

One-way from

$386
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$989
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. 12% potential increase in price ($168 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 15, 2025.

This Mytrip deal was found by Cheapflights users on 9/14. 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.
Mon 11/35:35 amBWI - BKK
2 stops27h 50mMultiple Airlines
Thu 11/610:55 pmBKK - BWI
2 stops32h 24mMultiple Airlines
Deal found 9/14$806
This Mytrip deal was found by Cheapflights users on 9/15. 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.
Mon 11/35:35 amBWI - BKK
2 stops27h 50mMultiple Airlines
Sun 11/1610:55 pmBKK - BWI
2 stops32h 24mMultiple Airlines
Deal found 9/15$812
This Mytrip deal was found by Cheapflights users on 9/15. 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.
Mon 10/275:35 amBWI - BKK
2 stops28h 50mMultiple Airlines
Sun 11/910:55 pmBKK - BWI
2 stops32h 24mMultiple Airlines
Deal found 9/15$819
This Mytrip deal was found by Cheapflights users on 9/14. 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.
Tue 10/145:35 amBWI - BKK
2 stops28h 35mMultiple Airlines
Tue 10/2810:55 pmBKK - BWI
3 stops34h 34mMultiple Airlines
Deal found 9/14$836
This Mytrip deal was found by Cheapflights users on 9/13. 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.
Tue 11/45:35 amBWI - BKK
2 stops29h 10mMultiple Airlines
Tue 11/1811:35 pmBKK - BWI
2 stops31h 44mMultiple Airlines
Deal found 9/13$847
This Etihad Airways deal was found by Cheapflights users on 9/14. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/810:05 pmIAD - BKK
1 stop33h 45mEtihad Airways
Fri 10/177:20 amBKK - IAD
2 stops43h 50mEtihad Airways
Deal found 9/14$851
This Etihad Airways deal was found by Cheapflights users on 9/15. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1510:05 pmIAD - BKK
2 stops49h 55mEtihad Airways
Sat 10/257:20 amBKK - IAD
2 stops44h 30mEtihad Airways
Deal found 9/15$852
This FlightHub deal was found by Cheapflights users on 9/14. 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.
Tue 10/79:00 pmIAD - BKK
1 stop28h 55mQatar Airways
Wed 10/298:30 pmBKK - IAD
1 stop31h 25mQatar Airways
Deal found 9/14$854
This Etihad Airways deal was found by Cheapflights users on 9/14. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/610:05 pmIAD - BKK
1 stop21h 25mEtihad Airways
Thu 10/302:55 amBKK - IAD
1 stop24h 55mEtihad Airways
Deal found 9/14$855
This Etihad Airways deal was found by Cheapflights users on 9/13. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/310:05 pmIAD - BKK
1 stop33h 45mEtihad Airways
Sun 10/128:55 pmBKK - IAD
1 stop30h 15mEtihad Airways
Deal found 9/13$856
This FlightHub deal was found by Cheapflights users on 9/14. 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.
Tue 9/309:00 pmIAD - BKK
1 stop29h 25mQatar Airways
Mon 2/92:00 amBKK - IAD
1 stop25h 55mQatar Airways
Deal found 9/14$857
This oojo deal was found by Cheapflights users on 9/15. 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.
Wed 9/179:00 pmIAD - BKK
1 stop22h 15mQatar Airways
Wed 9/242:30 amBKK - IAD
1 stop24h 10mQatar Airways
Deal found 9/15$858

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 September 15, 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

Wed 10/29

10:10 pm-11:30 pm

2 stops38h 20m

Bangkok Suvarnabhumi

Mon 11/10

7:35 am-3:50 pm

2 stops44h 15m

$855

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Tue 10/28

10:10 pm-11:30 pm

2 stops38h 20m

Bangkok Suvarnabhumi

Mon 11/10

7:35 am-3:50 pm

2 stops44h 15m

$855

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Tue 10/28

10:10 pm-11:30 pm

2 stops38h 20m

Bangkok Suvarnabhumi

Mon 11/17

2:55 am-3:50 pm

1 stop24h 55m

$855

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Mon 10/27

10:10 pm-11:30 pm

2 stops38h 20m

Bangkok Suvarnabhumi

Sat 11/8

2:55 am-3:50 pm

1 stop24h 55m

$865

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Fri 10/24

9:00 pm-6:55 am

1 stop22h 55m

Bangkok Suvarnabhumi

Fri 10/31

2:00 am-4:55 pm

1 stop25h 55m

$901

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Sat 11/8

9:10 pm-11:20 pm

1 stop38h 10m

Bangkok Suvarnabhumi

Tue 12/2

8:55 am-3:50 pm

1 stop42h 55m

$919

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Sat 10/4

10:05 pm-7:20 am

1 stop22h 15m

Bangkok Suvarnabhumi

Fri 10/17

2:55 am-4:10 pm

1 stop24h 15m

$919

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Fri 11/14

10:40 am-7:25 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Sun 11/23

2:00 am-3:55 pm

1 stop25h 55m

$920

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Tue 9/23

6:15 am-1:05 am

2 stops31h 50m

Bangkok Suvarnabhumi

Tue 10/21

9:50 am-11:40 pm

2 stops24h 50m

$929

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Mon 9/22

7:05 am-11:25 pm

2 stops29h 20m

Bangkok Suvarnabhumi

Sun 9/28

2:35 am-12:13 am

2 stops32h 38m

$929

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

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 September 12, 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, September is the cheapest month in which you can book a flight from Washington, D.C. to Bangkok (average of $908). Flying from Washington, D.C. to Bangkok in December is currently the most expensive (average of $1,518). 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 September 15, 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.

How much does it cost to fly round-trip from Washington, D.C. to Bangkok?

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 September 15, 2025.
Peruse reviews from past customers who have flown with Korean Air, Emirates, and Qatar Airways from Washington, D.C. to Bangkok to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,139 reviews

Overall

8.4

Food

8.1

Crew

8.7

Comfort

8.3

Entertainment

8.2

Boarding

8.5

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
1,139 reviews
Korean Air
8.4
Very good
1,139 reviews

Overall

8.4

Food

8.1

Crew

8.7

Comfort

8.3

Entertainment

8.2

Boarding

8.5

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.
Emirates
8.1
Very good
3,334 reviews
Korean Air
8.4
Very good
1,139 reviews

Overall

8.4

Food

8.1

Crew

8.7

Comfort

8.3

Entertainment

8.2

Boarding

8.5

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.
Qatar Airways
7.4
Good
3,624 reviews
Korean Air
8.4
Very good
1,139 reviews

Overall

8.4

Food

8.1

Crew

8.7

Comfort

8.3

Entertainment

8.2

Boarding

8.5

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.
Etihad Airways
7.4
Good
1,250 reviews
Korean Air
8.4
Very good
1,139 reviews

Overall

8.4

Food

8.1

Crew

8.7

Comfort

8.3

Entertainment

8.2

Boarding

8.5

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.
Turkish Airlines
7.3
Good
3,968 reviews
Korean Air
8.4
Very good
1,139 reviews

Overall

8.4

Food

8.1

Crew

8.7

Comfort

8.3

Entertainment

8.2

Boarding

8.5

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.

  • How long is the flight from Washington, D.C. to Bangkok?

    Etihad Airways, JetBlue, and Korean Air can get you from Washington, D.C. to Bangkok in just under 22h 55m. Your travel time can differ by up to 15h 25m. There are 8792 mi between Washington, D.C. and Bangkok. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Flying on Air China is currently your cheapest option to Bangkok, with prices starting at $565. Additional round-trip tickets that might be worth considering are offered by Air India and Korean Air, with the lowest prices starting at $700 and $805, respectively. Users have found that Air China is 53% cheaper than the other options available to this destination.

  • 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, Baltimore/Washington - Bangkok Suvarnabhumi and Washington, D.C. Reagan-National - 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. Seoul 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 $19 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, Beyazit Meydani, and Laleli Camii. Taksim Square, Beyazit Meydani, and Laleli Camii can be visited by traveling about 20.8 mi, 21.7 mi, and 21.5 mi respectively from Istanbul. Travelers in need of a car in Istanbul can rent one for about $44 per day.

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

    Dongdaemun Market, Lotte World, and Bukchon Hanok Village are the most popular attractions in Seoul if you're in need of something to do during your layover. Dongdaemun Market, Lotte World and Bukchon Hanok Village are located about 31.6 mi, 35.7 mi, and 30.6 mi, respectively from Incheon Intl if you are interested in checking them out. Travelers in need of a car in Seoul can rent one for about $62 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 Jeddah in terms of the least popular layover location on flights from Washington, D.C. to Bangkok. Jeddah 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, September is the cheapest month in which you can book a flight from Washington, D.C. to Bangkok (average of $908). Flying from Washington, D.C. to Bangkok in December is currently the most expensive (average of $1,518). 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

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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest$565Average$866FlexibilityNo cancel feeOn-time67%
Air IndiaCheapest$700Average$843FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$802Average$1,525FlexibilityNo cancel feeOn-time81%
SAUDIACheapest$823Average$923FlexibilityNo cancel feeOn-time86%
Etihad AirwaysCheapest$880Average$1,112FlexibilityNo cancel feeOn-time75%
ANACheapest$895Average$1,215FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$911Average$1,188FlexibilityNo cancel feeOn-time77%
DeltaCheapest$928Average$1,146FlexibilityNo cancel feeOn-timeN/A
Qatar AirwaysCheapest$937Average$1,214FlexibilityNo cancel feeOn-time68%
United AirlinesCheapest$937Average$1,305FlexibilityNo cancel feeOn-time69%

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