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Dulles Intl

$615+ Cheap flights from Thailand to Dulles Intl (IAD)

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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
Jul 30 — Aug 61
Thu 7/30
Thu 8/6
1 adult, Economy
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Cheap flight deals from Thailand to Dulles Intl

Cheapest flights from Thailand to Dulles Intl
Explore the most affordable flight options available from Thailand to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2026.

This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/49:35 am
BKK
-
IAD
1 stop35h 30m
United Airlines
Sat 10/2412:40 pm
IAD
-
BKK
3 stops35h 50m
United Airlines
Deal found 6/28$884
This United Airlines deal was found by Cheapflights users on 6/26. 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.
Thu 9/179:35 am
BKK
-
IAD
1 stop35h 30m
United Airlines
Mon 9/216:15 am
IAD
-
BKK
2 stops29h 00m
United Airlines
Deal found 6/26$935
This United Airlines deal was found by Cheapflights users on 6/27. 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.
Sun 7/57:00 am
BKK
-
IAD
2 stops27h 19m
United Airlines
Sun 7/1212:50 pm
IAD
-
BKK
1 stop28h 45m
United Airlines
Deal found 6/27$939
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:00 am
BKK
-
IAD
2 stops35h 19m
United Airlines
Sun 10/48:20 am
IAD
-
BKK
2 stops33h 15m
United Airlines
Deal found 6/28$942
This United Airlines deal was found by Cheapflights users on 6/26. 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.
Fri 7/37:00 am
BKK
-
IAD
2 stops25h 00m
United Airlines
Sat 7/2512:50 pm
IAD
-
BKK
1 stop28h 45m
United Airlines
Deal found 6/26$947
This United Airlines deal was found by Cheapflights users on 6/26. 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.
Thu 10/83:45 pm
BKK
-
IAD
3 stops40h 42m
United Airlines
Sun 1/1010:10 pm
IAD
-
BKK
2 stops38h 10m
United Airlines
Deal found 6/26$950
This United Airlines deal was found by Cheapflights users on 6/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:00 am
BKK
-
IAD
2 stops25h 22m
United Airlines
Tue 9/86:15 am
IAD
-
BKK
2 stops30h 40m
United Airlines
Deal found 6/29$953
This Korean Air deal was found by Cheapflights users on 6/28. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/412:15 am
CNX
-
IAD
1 stop21h 35m
Korean Air
Mon 11/911:50 am
IAD
-
CNX
1 stop23h 05m
Korean Air
Deal found 6/28$1,112
This Gotogate deal was found by Cheapflights users on 6/26. 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.
Mon 8/108:00 pm
CNX
-
IAD
2 stops55h 45m
Multiple Airlines
Mon 8/1710:20 pm
IAD
-
CNX
2 stops33h 50m
Multiple Airlines
Deal found 6/26$1,284
This SWISS deal was found by Cheapflights users on 6/25. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/98:00 pm
CNX
-
IAD
2 stops54h 30m
SWISS
Sun 8/168:20 pm
IAD
-
CNX
2 stops30h 25m
SWISS
Deal found 6/25$1,318
This Qatar Airways deal was found by Cheapflights users on 6/28. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/57:45 pm
CNX
-
IAD
2 stops32h 10m
Qatar Airways
Mon 11/98:05 pm
IAD
-
CNX
2 stops25h 20m
Qatar Airways
Deal found 6/28$1,343
This STARLUX Airlines deal was found by Cheapflights users on 6/25. 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 STARLUX Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:20 pm
CNX
-
IAD
2 stops47h 20m
STARLUX Airlines
Sun 9/135:57 pm
IAD
-
CNX
2 stops35h 23m
STARLUX Airlines
Deal found 6/25$1,351

Find flight deals from Thailand to Dulles Intl

Keep the following information in mind while searching for Thailand to Dulles Intl flight deals. Data was last updated June 30, 2026.

Round-trip from

$884
(United Airlines)

One-way from

$615
(KAYAK)

Popular in

April

Cheapest in

October

Average price

$1,103
From Thailand to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Thailand to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($237 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($64 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Thailand to Dulles Intl 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 30, 2026.
Use the filters below to find and compare flights from Thailand to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 9/30

7:00 am-9:27 pm

2 stops25h 27m

Washington, D.C. Dulles Intl

Sun 10/4

10:29 pm-4:35 am

2 stops43h 06m

$939

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 9/17

9:50 am-11:05 am

1 stop36h 15m

Washington, D.C. Dulles Intl

Mon 9/21

1:15 pm-1:05 am

1 stop24h 50m

$1,045

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 9/20

2:35 am-9:45 pm

2 stops30h 10m

Washington, D.C. Dulles Intl

Tue 10/20

6:12 pm-1:35 pm

2 stops32h 23m

$1,046

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 7/18

11:30 pm-11:20 pm

2 stops34h 50m

Washington, D.C. Dulles Intl

Sat 8/8

2:54 pm-1:35 pm

2 stops35h 41m

$1,082

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 9/21

7:00 am-12:44 am

2 stops28h 44m

Washington, D.C. Dulles Intl

Tue 10/20

12:35 pm-4:35 am

1 stop29h 00m

$1,090

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 7/22

3:45 pm-3:50 pm

2 stops35h 05m

Washington, D.C. Dulles Intl

Mon 8/10

5:41 pm-9:35 am

3 stops28h 54m

$1,132

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 7/22

3:45 pm-3:50 pm

2 stops35h 05m

Washington, D.C. Dulles Intl

Sun 8/9

5:41 pm-9:35 am

3 stops28h 54m

$1,139

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 8/18

9:35 am-4:02 pm

2 stops41h 27m

Washington, D.C. Dulles Intl

Wed 8/26

5:42 pm-9:35 am

2 stops28h 53m

$1,139

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 7/22

2:35 am-12:08 am

2 stops32h 33m

Washington, D.C. Dulles Intl

Sun 8/9

1:30 pm-1:35 pm

1 stop37h 05m

$1,178

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 7/22

9:55 am-3:40 pm

1 stop40h 45m

Washington, D.C. Dulles Intl

Mon 8/10

9:00 pm-12:55 pm

1 stop28h 55m

$1,186

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Showing 1-10 of 51 resultsSorted by cheapest first
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Best time to book a flight from Thailand to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Thailand 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 Thailand to Washington, D.C. Dulles Intl Airport

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

Currently, April is the cheapest month in which you can book a flight from Thailand to Washington, D.C. Dulles Intl Airport (average of $472). Flying from Thailand to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of $1,177). 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.

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

The best time to book flights from Thailand to Washington, D.C. Dulles Intl Airport is 90 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated June 30, 2026.
Read reviews from past customers who have flown Korean Air,ANA, andDelta from Thailand to Washington, D.C. Dulles Intl Airport. 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
1,220 reviews

Entertainment

8.2

Boarding

8.5

Crew

8.7

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
1,220 reviews
Korean Air
8.4
Very good
1,220 reviews

Entertainment

8.2

Boarding

8.5

Crew

8.7

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!!
ANA
8.3
Very good
1,259 reviews
Korean Air
8.4
Very good
1,220 reviews

Entertainment

8.2

Boarding

8.5

Crew

8.7

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!!
Delta
7.8
Good
8,451 reviews
Korean Air
8.4
Very good
1,220 reviews

Entertainment

8.2

Boarding

8.5

Crew

8.7

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!!
United Airlines
7.4
Good
9,905 reviews
Korean Air
8.4
Very good
1,220 reviews

Entertainment

8.2

Boarding

8.5

Crew

8.7

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
7.3
Good
3,738 reviews
Korean Air
8.4
Very good
1,220 reviews

Entertainment

8.2

Boarding

8.5

Crew

8.7

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 Thailand to Dulles Intl. 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 Thailand to Washington, D.C. Dulles Intl Airport?

    United Airlines, Korean Air, and Delta can get you from Thailand to Washington, D.C. Dulles Intl Airport in just under 25h 27m. Your travel time can differ by up to 10h 48m. Thailand and Washington, D.C. Dulles Intl Airport are separated by a distance of 8792 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Thailand to Washington, D.C. Dulles Intl Airport one-way?

    The cheapest airline one-way is Air China, with whom users have recently found tickets for as low as $423. However, be on the lookout for offers from AIR PREMIA and Turkish Airlines, as they are both options that can get you from Thailand to Washington, D.C. Dulles Intl Airport for a low price.

  • What are the most popular routes from Thailand to Washington, D.C. Dulles Intl Airport?

    The most popular flight routes from Thailand to Washington, D.C. Dulles Intl Airport are Bangkok Suvarnabhumi - Washington, D.C. Dulles Intl, Bangkok Don Mueang Intl - Washington, D.C. Dulles Intl and Chiang Mai - Washington, D.C. Dulles Intl.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Thailand to Dulles Intl 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 Thailand to Washington, D.C. Dulles Intl Airport?

    Currently, April is the cheapest month in which you can book a flight from Thailand to Washington, D.C. Dulles Intl Airport (average of $472). Flying from Thailand to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of $1,177). 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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Arlington
Tysons
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Falls Church
Fredericksburg
Hanover
Chantilly
Manassas
Silver Spring
Laurel
Clinton
Hunt Valley
Cordova

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Top 5 airlines flying from Thailand to Dulles Intl

Discover the top 5 airlines that operate flights from Thailand to Dulles Intl. 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 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$958Average$1,147FlexibilityNo cancel feeOn-time69%
ANACheapest$1,028Average$1,286FlexibilityNo cancel feeOn-time80%
Korean AirCheapest$1,070Average$1,221FlexibilityNo cancel feeOn-time81%
DeltaCheapest$1,112Average$1,119FlexibilityNo cancel feeOn-timeN/A
Qatar AirwaysCheapest$1,142Average$1,177FlexibilityNo cancel feeOn-time68%

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