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Cheap flights from Thailand to Washington, D.C. Dulles Intl Airport from ฿20,468

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
10 Jul — 17 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Thailand to Dulles Intl

Enter your travel dates to find the best prices.

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 10 June 2026.

Sun 20/915:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sun 27/918:50
IAD
-
BKK
1 stop31h 55m
ซาอุเดียแอร์ไลน์
Deal found 9/6฿29,798
Sun 20/915:45
BKK
-
IAD
3 stops38h 38m
United Airlines
Sun 27/922:13
IAD
-
BKK
2 stops48h 22m
United Airlines
Deal found 9/6฿29,831
Tue 9/609:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Tue 16/606:33
IAD
-
BKK
2 stops35h 02m
United Airlines
Deal found 7/6฿30,817
Thu 11/609:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Thu 18/608:29
IAD
-
BKK
2 stops28h 26m
United Airlines
Deal found 5/6฿30,882
Wed 10/607:00
BKK
-
IAD
2 stops25h 00m
United Airlines
Wed 9/912:35
IAD
-
BKK
1 stop29h 00m
United Airlines
Deal found 8/6฿31,112
Tue 7/709:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Wed 22/722:29
IAD
-
BKK
2 stops38h 26m
United Airlines
Deal found 8/6฿31,310
Thu 25/609:35
BKK
-
IAD
2 stops50h 10m
United Airlines
Wed 15/717:42
IAD
-
BKK
2 stops43h 13m
United Airlines
Deal found 8/6฿31,342
Tue 7/709:35
BKK
-
IAD
2 stops48h 44m
United Airlines
Mon 27/707:00
IAD
-
BKK
2 stops39h 35m
United Airlines
Deal found 7/6฿31,375
Fri 26/607:00
BKK
-
IAD
2 stops27h 19m
United Airlines
Fri 3/720:18
IAD
-
BKK
2 stops26h 17m
United Airlines
Deal found 5/6฿31,408
Thu 25/611:20
CNX
-
IAD
2 stops30h 19m
Multiple Airlines
Thu 9/718:14
IAD
-
CNX
2 stops29h 06m
Multiple Airlines
Deal found 9/6฿39,622
Wed 4/1100:15
CNX
-
IAD
1 stop21h 35m
Korean Air
Mon 9/1111:50
IAD
-
CNX
1 stop23h 05m
Korean Air
Deal found 8/6฿45,207
Thu 5/1119:45
CNX
-
IAD
2 stops32h 10m
Qatar Airways
Mon 9/1120:05
IAD
-
CNX
2 stops34h 55m
Qatar Airways
Deal found 8/6฿45,338

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 10 June 2026.

Round-trip from

฿29,798

One-way from

฿20,468

Popular in

April

Cheapest in

October

Average price

฿35,810
ซาอุเดียแอร์ไลน์
  • ซาอุเดียแอร์ไลน์
  • 20/9-27/9
  • 2 total stops
  • 67h 15m total
  • Thailand to Washington, D.C.
Search Deals
AIR PREMIA
  • AIR PREMIA
  • 1/9
  • 1 total stop
  • 23h 05m total
  • Thailand to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (฿276,767 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (฿70,562 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 17,341 searches. Data last updated 10 June 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 return flight

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 3/7

07:00-23:19

2 stops27h 19m

Washington, D.C. Dulles Intl

Sat 25/7

17:48-09:35

2 stops28h 47m

฿31,638

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 15/9

15:45-11:26

3 stops30h 41m

Washington, D.C. Dulles Intl

Tue 10/11

08:35-05:10

2 stops32h 35m

฿31,671

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 14/9

15:45-11:26

3 stops30h 41m

Washington, D.C. Dulles Intl

Mon 9/11

10:08-05:10

2 stops31h 02m

฿31,671

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 24/9

09:35-10:05

1 stop35h 30m

Washington, D.C. Dulles Intl

Wed 11/11

13:05-11:25

3 stops34h 20m

฿35,778

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 24/9

09:35-10:05

1 stop35h 30m

Washington, D.C. Dulles Intl

Thu 12/11

08:35-05:10

2 stops32h 35m

฿35,810

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 24/9

09:35-10:05

1 stop35h 30m

Washington, D.C. Dulles Intl

Tue 10/11

13:05-05:10

2 stops28h 05m

฿35,810

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 26/6

07:00-21:00

2 stops25h 00m

Washington, D.C. Dulles Intl

Thu 16/7

08:29-23:55

2 stops28h 26m

฿37,387

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 22/7

09:35-14:12

2 stops39h 37m

Washington, D.C. Dulles Intl

Mon 18/1

11:10-05:10

1 stop30h 00m

฿39,654

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 22/7

09:35-14:12

2 stops39h 37m

Washington, D.C. Dulles Intl

Thu 12/11

06:30-00:20

2 stops29h 50m

฿39,753

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 19/6

02:30-15:40

1 stop24h 10m

Washington, D.C. Dulles Intl

Sat 27/6

21:00-06:20

1 stop22h 20m

฿40,279

Flights are sorted by cheapest return flights first.

Deals found on 8/6

Showing 1-10 of 55 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 return 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 ฿15,507). Flying from Thailand to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of ฿38,669). 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?

To ensure you get the cheapest price possible for a flight from Thailand to Washington, D.C. Dulles Intl Airport, you should look to book at least 17 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.

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 10 June 2026.
Check out reviews from past customers who have flown with Korean Air,ANA, andUnited Airlines from Thailand to Washington, D.C. Dulles Intl Airport 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
1,218 reviews
Check prices

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

Food

8.1

Boarding

8.5

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
1,218 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

Food

8.1

Boarding

8.5

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
1,230 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

Food

8.1

Boarding

8.5

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
9,808 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

Food

8.1

Boarding

8.5

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
3,726 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

Food

8.1

Boarding

8.5

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!!
เอทิฮัดแอร์เวย์
7.3
Good
1,452 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

Food

8.1

Boarding

8.5

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 Qatar Airways can get you from Thailand to Washington, D.C. Dulles Intl Airport in just under 21h 35m. Your travel time can differ by up to 12h 35m. Thailand and Washington, D.C. Dulles Intl Airport are separated by a distance of 13576 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    While some choose either Bangkok Don Mueang Intl - Washington, D.C. Dulles Intl or Utapao Rayong Pattaya - Washington, D.C. Dulles Intl, Bangkok Suvarnabhumi - Washington, D.C. Dulles Intl is the most popular route from Thailand to Washington, D.C. Dulles Intl Airport.

  • 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 holiday 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 ฿15,507). Flying from Thailand to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of ฿38,669). 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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Alternative routes for Thailand to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Chiang Mai to Dulles Intl flights
Chiang Mai to Baltimore flights
Chiang Mai to Reagan-National flights

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 17,341 searches. Data last updated 10 June 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest฿31,760Average฿33,375FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
เอทิฮัดแอร์เวย์Cheapest฿32,772Average฿33,167FlexibilityNo cancel feeOn-time75%
Search เอทิฮัดแอร์เวย์ flights
Korean AirCheapest฿33,126Average฿35,763FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
ANACheapest฿34,708Average฿37,798FlexibilityNo cancel feeOn-time80%
Search ANA flights
Qatar AirwaysCheapest฿36,928Average฿40,504FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Thailand to Dulles Intl?

When you search for this flight from Thailand to Dulles Intl, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Thailand to Dulles Intl?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Dulles Intl from Thailand.

Can Cheapflights find flights from Thailand to Dulles Intl with no change fees?

Yes, we can. To see specific flights from Thailand to Dulles Intl with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Thailand to Dulles Intl become cheaper?

Not ready to book yet? You can track prices for flights from Thailand to Dulles Intl on Cheapflights with our Price Alert feature and get notified when better prices are available.

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