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$369+ 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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BKK
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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 27 days in advance, depart on a Saturday or Tuesday and return on a Sunday

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 October 30, 2025.

This CheapTickets.ch deal was found by Cheapflights users on 10/28. 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 CheapTickets.ch is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/278:05 pmIAD - BKK
1 stop35h 20mQatar Airways
Wed 12/32:00 amBKK - IAD
1 stop25h 55mQatar Airways
Deal found 10/28$849
This oojo deal was found by Cheapflights users on 10/28. 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.
Fri 11/2810:40 amIAD - BKK
1 stop20h 45mQatar Airways
Wed 12/103:00 amBKK - IAD
1 stop24h 55mQatar Airways
Deal found 10/28$854
This Etihad Airways deal was found by Cheapflights users on 10/30. 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.
Thu 11/279:10 pmIAD - BKK
1 stop38h 10mEtihad Airways
Wed 12/108:50 pmBKK - IAD
1 stop30h 40mEtihad Airways
Deal found 10/30$855
This Etihad Airways deal was found by Cheapflights users on 10/29. 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.
Sun 11/309:10 pmIAD - BKK
1 stop38h 10mEtihad Airways
Sat 3/282:55 amBKK - IAD
1 stop41h 50mEtihad Airways
Deal found 10/29$856
This FlightHub deal was found by Cheapflights users on 10/28. 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 11/278:05 pmIAD - BKK
1 stop34h 20mQatar Airways
Sun 12/148:30 pmBKK - IAD
1 stop31h 25mQatar Airways
Deal found 10/28$859
This oojo deal was found by Cheapflights users on 10/28. 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 10/286:13 pmIAD - BKK
2 stops35h 17mSTARLUX Airlines
Mon 11/101:45 pmBKK - IAD
2 stops28h 38mSTARLUX Airlines
Deal found 10/28$863
This oojo deal was found by Cheapflights users on 10/29. 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 11/36:13 pmIAD - BKK
2 stops34h 17mSTARLUX Airlines
Mon 11/171:45 pmBKK - IAD
2 stops28h 38mSTARLUX Airlines
Deal found 10/29$865
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/249:10 pmIAD - BKK
1 stop38h 10mEtihad Airways
Tue 12/239:25 amBKK - IAD
1 stop35h 40mEtihad Airways
Deal found 10/29$868
This EaseMyTrip deal was found by Cheapflights users on 10/28. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/169:15 pmIAD - BKK
2 stops35h 50mIndiGo
Wed 11/1910:50 amBKK - IAD
2 stops44h 30mIndiGo
Deal found 10/28$869
This oojo deal was found by Cheapflights users on 10/30. 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.
Fri 10/319:59 amDCA - BKK
2 stops36h 51mChina Airlines
Fri 11/72:05 pmBKK - DCA
2 stops41h 55mChina Airlines
Deal found 10/30$870
This oojo deal was found by Cheapflights users on 10/30. 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 11/106:13 pmIAD - BKK
2 stops34h 17mMultiple Airlines
Mon 12/81:45 pmBKK - IAD
2 stops28h 21mMultiple Airlines
Deal found 10/30$870
This IEagle deal was found by Cheapflights users on 10/28. 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.
Sun 11/167:38 amBWI - BKK
2 stops44h 52mMultiple Airlines
Sun 11/231:45 pmBKK - BWI
2 stops27h 54mMultiple Airlines
Deal found 10/28$910

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 October 30, 2025.

Round-trip from

$851
(oojo)

One-way from

$369
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$1,038
From Washington, D.C. (WAS) to Bangkok
Search Deals
One-way flight from Washington, D.C. (WAS) to Bangkok
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($185 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 30, 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

Mon 3/2

2:35 pm-6:00 pm

1 stop39h 25m

Bangkok Suvarnabhumi

Thu 3/26

2:55 am-10:05 am

1 stop42h 10m

$852

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Sun 2/8

2:35 pm-11:20 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Fri 2/20

7:35 pm-9:05 am

2 stops49h 30m

$852

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Thu 2/5

2:35 pm-11:20 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Sun 2/15

8:55 am-9:05 am

1 stop36h 10m

$852

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Mon 2/23

2:35 pm-7:10 am

1 stop28h 35m

Bangkok Suvarnabhumi

Sun 3/8

2:55 am-10:05 am

1 stop42h 10m

$852

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Mon 2/9

2:35 pm-11:20 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Mon 3/9

5:40 pm-10:05 am

2 stops51h 25m

$856

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Sun 1/11

2:35 pm-7:10 am

1 stop28h 35m

Bangkok Suvarnabhumi

Sun 4/26

9:10 am-9:45 am

1 stop35h 35m

$857

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Fri 3/27

3:35 pm-11:20 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Thu 4/2

8:55 pm-9:45 am

1 stop23h 50m

$916

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Mon 2/9

7:35 am-11:20 pm

2 stops27h 45m

Bangkok Suvarnabhumi

Tue 3/10

2:05 am-10:16 pm

2 stops31h 11m

$928

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Mon 1/12

6:59 am-12:55 am

2 stops29h 56m

Bangkok Suvarnabhumi

Mon 2/16

9:30 pm-6:06 pm

2 stops32h 36m

$953

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Mon 1/12

7:35 am-11:20 pm

2 stops27h 45m

Bangkok Suvarnabhumi

Tue 1/20

9:40 am-11:34 pm

2 stops25h 54m

$953

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

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 October 24, 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 27 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, May is the cheapest month in which you can book a flight from Washington, D.C. to Bangkok (average of $629). Flying from Washington, D.C. to Bangkok in June is currently the most expensive (average of $1,097). 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 October 30, 2025.

It’s typically best to fly out from Washington, D.C. to Bangkok in the evening. Doing so could potentially save you 28% on the flight price compared to flying at noon, 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 Tuesday evenings when fares are most often at their lowest. Sunday at noon 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 October 30, 2025.
Peruse reviews from past customers who have flown with Korean Air, Qatar Airways, and Etihad 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
1,155 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Entertainment

8.2

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
1,155 reviews
Korean Air
8.4
Very good
1,155 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Entertainment

8.2

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
3,661 reviews
Korean Air
8.4
Very good
1,155 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Entertainment

8.2

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
1,284 reviews
Korean Air
8.4
Very good
1,155 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Entertainment

8.2

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.
United Airlines
7.4
Good
8,998 reviews
Korean Air
8.4
Very good
1,155 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Entertainment

8.2

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
4,031 reviews
Korean Air
8.4
Very good
1,155 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Food

8.1

Crew

8.7

Entertainment

8.2

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, Delta, and Korean Air can get you from Washington, D.C. to Bangkok in just under 27h 45m. Your travel time can differ by up to 11h 40m. There are 8797 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 cheapest airlines to fly from Washington, D.C. to Bangkok one-way?

    To fly one-way, consider booking your trip with STARLUX Airlines, which is currently one of the cheapest options available, starting at $462. JetBlue flights start at $475 while deals on ANA start at $491 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. Abu Dhabi comes in third as the most popular layover location on Washington, D.C. to Bangkok flights.

  • 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 $39 per day.

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

    Emirates Palace, Emirates Park Zoo, and Ferrari World Abu Dhabi are the most popular attractions in Abu Dhabi if you're in need of something to do during your layover. Emirates Palace, Emirates Park Zoo and Ferrari World Abu Dhabi are located about 21.1 mi, 7.9 mi, and 4.5 mi, respectively from Abu Dhabi Zayed Intl if you are interested in checking them out. Travelers in need of a car in Abu Dhabi can rent one for about $27 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 Jeddah the least frequently. Jeddah is followed by Tokyo in terms of the least popular layover location on flights from Washington, D.C. to Bangkok. Tokyo is followed by Seoul 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, May is the cheapest month in which you can book a flight from Washington, D.C. to Bangkok (average of $629). Flying from Washington, D.C. to Bangkok in June is currently the most expensive (average of $1,097). 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest$565Average$866FlexibilityNo cancel feeOn-time67%
Air IndiaCheapest$700Average$844FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$802Average$1,354FlexibilityNo cancel feeOn-time81%
Etihad AirwaysCheapest$827Average$1,080FlexibilityNo cancel feeOn-time75%
Qatar AirwaysCheapest$852Average$1,281FlexibilityNo cancel feeOn-time68%
ANACheapest$895Average$1,212FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$897Average$1,180FlexibilityNo cancel feeOn-time77%
JetBlueCheapest$900Average$1,561FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$920Average$1,396FlexibilityNo cancel feeOn-time75%
DeltaCheapest$928Average$1,151FlexibilityNo cancel feeOn-timeN/A

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