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$481+ Cheap flights from Dulles Intl (IAD) 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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BKK
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Bangkok are usually found in August or September, booked 11 days in advance, depart on a Saturday or Tuesday and return on a Sunday

Cheap flight deals from Dulles Intl to Bangkok

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 11, 2025.

Round-trip from

$848
(oojo)

One-way from

$481
(SmartFares)

Popular in

June

Cheapest in

August

Average price

$1,025
From Washington, D.C. Dulles Intl to Bangkok
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One-way flight from Washington, D.C. Dulles Intl to Bangkok
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Highest demand for flights based on searches. 10% potential increase in price ($136 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($27 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 Dulles Intl to Bangkok

Cheapest flights from Dulles Intl to Bangkok
Explore the most affordable flight options available from Dulles Intl to Bangkok. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Mytrip deal was found by Cheapflights users on 9/10. 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 9/1410:05 pmIAD - BKK
1 stop22h 15mEtihad Airways
Tue 9/169:30 amBKK - IAD
1 stop41h 40mEtihad Airways
Deal found 9/10$849
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Sat 9/1310:05 pmIAD - BKK
1 stop38h 50mEtihad Airways
Sat 9/202:55 amBKK - IAD
1 stop24h 15mEtihad Airways
Deal found 9/10$850
This Mytrip deal was found by Cheapflights users on 9/11. 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.
Tue 11/119:10 pmIAD - BKK
1 stop22h 00mEtihad Airways
Tue 11/182:55 amBKK - IAD
1 stop24h 55mEtihad Airways
Deal found 9/11$851
This oojo deal was found by Cheapflights users on 9/11. 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 10/139:00 pmIAD - BKK
1 stop23h 20mQatar Airways
Mon 11/178:30 pmBKK - IAD
1 stop31h 25mQatar Airways
Deal found 9/11$855
This FlightHub deal was found by Cheapflights users on 9/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1610:40 amIAD - BKK
1 stop20h 45mQatar Airways
Mon 2/162:00 amBKK - IAD
1 stop25h 55mQatar Airways
Deal found 9/10$857
This FlightHub deal was found by Cheapflights users on 9/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/71:30 pmIAD - BKK
1 stop31h 10mTurkish Airlines
Wed 11/1910:10 amBKK - IAD
1 stop37h 35mTurkish Airlines
Deal found 9/11$859
This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/169:10 pmIAD - BKK
1 stop38h 10mEtihad Airways
Sat 12/132:55 amBKK - IAD
1 stop24h 55mEtihad Airways
Deal found 9/10$860
This CrystalTravel deal was found by Cheapflights users on 9/10. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/710:00 pmIAD - BKK
1 stop32h 05mAir China
Mon 12/11:30 amBKK - IAD
1 stop29h 00mAir China
Deal found 9/10$865
This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3111:00 pmIAD - BKK
1 stop38h 10mAir China
Mon 11/107:30 pmBKK - IAD
1 stop35h 00mAir China
Deal found 9/10$866
This FlightHub deal was found by Cheapflights users on 9/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/261:30 pmIAD - BKK
1 stop26h 50mTurkish Airlines
Mon 12/2210:10 amBKK - IAD
1 stop45h 05mTurkish Airlines
Deal found 9/10$868
This IEagle deal was found by Cheapflights users on 9/11. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/110:05 pmIAD - BKK
1 stop38h 50mEtihad Airways
Tue 10/212:55 amBKK - IAD
1 stop24h 15mEtihad Airways
Deal found 9/11$869
This Trip.com deal was found by Cheapflights users on 9/9. 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.
Wed 10/16:30 pmIAD - DMK
2 stops46h 55mMultiple Airlines
Mon 10/138:35 pmDMK - IAD
2 stops30h 00mMultiple Airlines
Deal found 9/9$1,061

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 11, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Bangkok that are best for you.

Fly from

Dulles Intl

Fly to

Bangkok

Route

Depart

Return

Price

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Tue 10/14

10:05 pm-7:20 am

1 stop22h 15m

Bangkok Suvarnabhumi

Wed 11/12

8:50 pm-3:50 pm

1 stop31h 00m

$870

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Tue 10/14

10:05 pm-6:50 pm

1 stop33h 45m

Bangkok Suvarnabhumi

Sat 11/8

2:55 am-3:50 pm

1 stop24h 55m

$870

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Wed 10/15

10:05 pm-7:20 am

1 stop22h 15m

Bangkok Suvarnabhumi

Mon 11/10

8:50 pm-3:50 pm

1 stop31h 00m

$870

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Mon 11/17

8:05 pm-6:25 pm

1 stop34h 20m

Bangkok Suvarnabhumi

Wed 2/18

6:55 pm-3:55 pm

1 stop33h 00m

$903

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Tue 9/23

7:05 am-1:05 am

2 stops31h 00m

Bangkok Suvarnabhumi

Mon 10/20

2:35 am-11:40 pm

2 stops32h 05m

$928

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Thu 12/4

7:15 am-11:20 pm

2 stops28h 05m

Bangkok Suvarnabhumi

Wed 2/11

12:55 am-11:16 pm

2 stops34h 21m

$929

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Mon 9/15

9:50 am-1:05 am

2 stops28h 15m

Bangkok Suvarnabhumi

Wed 9/24

9:50 am-11:33 pm

2 stops24h 43m

$929

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Tue 12/2

7:15 am-11:20 pm

2 stops28h 05m

Bangkok Suvarnabhumi

Wed 2/11

12:55 am-11:16 pm

2 stops34h 21m

$929

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Wed 11/5

6:05 am-12:45 am

2 stops30h 40m

Bangkok Suvarnabhumi

Thu 12/18

9:40 am-12:02 am

2 stops26h 22m

$929

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Wed 11/26

7:01 am-9:30 pm

2 stops26h 29m

Bangkok Suvarnabhumi

Wed 12/10

9:40 am-12:02 am

2 stops26h 22m

$929

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 45 results
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Best time to book a flight from Dulles Intl to Bangkok

Have a flexible travel schedule? Discover the best time to fly to Bangkok from Dulles Intl 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. Dulles Intl Airport to Bangkok

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Bangkok. Price data was last updated on August 29, 2025.

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Bangkok may vary depending on when you book. For the best chance of a lower fare, look to book 11 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Bangkok (average of $908). Flying from Washington, D.C. Dulles Intl Airport 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 IAD to BKK?

Find hourly flight availability from Dulles Intl 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 11, 2025.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. Dulles Intl Airport to Bangkok in the afternoon. If you’re flexible enough to do this you can expect to save up to 17% on your trip compared to booking a flight in the morning.

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

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

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Bangkok flight should consider departing on Tuesday afternoons 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.

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 11, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Bangkok, such as Korean Air, Emirates, and Qatar Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,139 reviews

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Korean Air
8.4
Very good
1,139 reviews
Korean Air
8.4
Very good
1,139 reviews

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Emirates
8.1
Very good
3,334 reviews
Korean Air
8.4
Very good
1,139 reviews

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Qatar Airways
7.4
Good
3,624 reviews
Korean Air
8.4
Very good
1,139 reviews

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Etihad Airways
7.4
Good
1,250 reviews
Korean Air
8.4
Very good
1,139 reviews

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Turkish Airlines
7.3
Good
3,968 reviews
Korean Air
8.4
Very good
1,139 reviews

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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. Dulles Intl Airport to Bangkok?

    There are many flights that can get you from Washington, D.C. Dulles Intl Airport to Bangkok in 22h 15m. Fly via Etihad Airways, Qatar Airways, or Delta to get the fastest option. The distance from Washington, D.C. Dulles Intl Airport to Bangkok is about 8792 mi. This flight may include one or multiple stops.

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

    Air China, at $565, was found to be the cheapest airline from Washington, D.C. Dulles Intl Airport to Bangkok.Alternate airlines to your destination round-trip include Air India and Korean Air. Air China is priced at 53% lower than the current average price of a flight leaving 3 months from now.

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

    Most of the time, Washington, D.C. Dulles Intl Airport to Bangkok flights that have layovers will stop in Doha. Doha is followed by Istanbul in terms of the most popular layover location on flights from Washington, D.C. Dulles Intl Airport to Bangkok. Abu Dhabi ranks third in terms of the most popular layover location on Washington, D.C. Dulles Intl Airport 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 can rent a car at Istanbul for an average daily rate of $44 to make sightseeing during their layover a little easier.

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

    Most Abu Dhabi visitors opt to spend their time at Emirates Palace, Emirates Park Zoo, and Etihad Towers. Emirates Palace, Emirates Park Zoo, and Etihad Towers are located about 21.1 mi, 7.9 mi, and 20.8 mi, respectively from Abu Dhabi Zayed Intl. Those landing in Abu Dhabi looking to spend some time exploring during their layover can rent a car for about $22 per day.

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

    Flights departing from Washington, D.C. Dulles Intl Airport and landing in Bangkok layover in Atlanta least frequently. Atlanta is followed by Jeddah in terms of the least popular layover location on flights from Washington, D.C. Dulles Intl Airport to Bangkok. Tokyo sees the third fewest flights with layovers for the Washington, D.C. Dulles Intl Airport to Bangkok route.

  • Can I find deals for flights from Dulles Intl to Bangkok that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Bangkok flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Bangkok?

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

  • Can I find deals for business class flights from Dulles Intl to Bangkok?

    Yes. Cheapflights offers flight deals from Dulles Intl 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. Dulles Intl Airport to Bangkok?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Bangkok (average of $908). Flying from Washington, D.C. Dulles Intl Airport 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 Dulles Intl to Bangkok

Discover the top 10 airlines that operate flights from Dulles Intl 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 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest$565Average$866FlexibilityNo cancel feeOn-time67%
Air IndiaCheapest$700Average$843FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$805Average$1,225FlexibilityNo cancel feeOn-time81%
SAUDIACheapest$823Average$917FlexibilityNo cancel feeOn-time86%
Etihad AirwaysCheapest$885Average$1,115FlexibilityNo cancel feeOn-time75%
ANACheapest$896Average$997FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$911Average$1,158FlexibilityNo cancel feeOn-time77%
DeltaCheapest$928Average$1,122FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$936Average$1,392FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$937Average$1,184FlexibilityNo cancel feeOn-time69%

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