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Cheap flights from Thailand to Washington, D.C. Dulles Intl Airport from ฿20,447

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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
2 Aug — 9 Aug1
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 3 July 2026.

Thu 22/1015:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sat 7/1118:10
IAD
-
BKK
1 stop31h 30m
ซาอุเดียแอร์ไลน์
Deal found 30/6฿26,631
Wed 7/1007:00
BKK
-
IAD
2 stops25h 11m
ANA
Wed 14/1022:13
IAD
-
BKK
2 stops38h 42m
ANA
Deal found 30/6฿31,053
Wed 30/907:00
BKK
-
IAD
2 stops35h 19m
United Airlines
Sun 4/1008:20
IAD
-
BKK
2 stops33h 15m
United Airlines
Deal found 28/6฿31,319
Thu 9/709:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Thu 20/808:35
IAD
-
BKK
2 stops28h 20m
United Airlines
Deal found 30/6฿31,419
Thu 9/709:35
BKK
-
IAD
2 stops48h 44m
United Airlines
Mon 20/713:10
IAD
-
BKK
2 stops33h 25m
United Airlines
Deal found 30/6฿31,486
Fri 3/707:00
BKK
-
IAD
2 stops25h 00m
United Airlines
Sat 25/715:15
IAD
-
BKK
2 stops31h 20m
United Airlines
Deal found 29/6฿31,652
Tue 25/807:00
BKK
-
IAD
2 stops25h 22m
United Airlines
Tue 8/906:15
IAD
-
BKK
2 stops30h 40m
United Airlines
Deal found 29/6฿31,685
Wed 8/707:00
BKK
-
IAD
2 stops27h 19m
United Airlines
Wed 29/720:00
IAD
-
BKK
2 stops26h 35m
United Airlines
Deal found 29/6฿31,918
Wed 4/1100:15
CNX
-
IAD
1 stop21h 35m
Korean Air
Mon 9/1111:50
IAD
-
CNX
1 stop23h 05m
Korean Air
Deal found 28/6฿36,972
Thu 5/1119:45
CNX
-
IAD
2 stops32h 10m
Qatar Airways
Mon 9/1120:05
IAD
-
CNX
2 stops25h 20m
Qatar Airways
Deal found 28/6฿44,652
Tue 3/1100:15
CNX
-
IAD
1 stop21h 35m
Korean Air
Sun 8/1111:50
IAD
-
CNX
1 stop23h 05m
Korean Air
Deal found 2/7฿45,483
Wed 4/1119:45
CNX
-
IAD
2 stops32h 10m
Qatar Airways
Sun 8/1120:05
IAD
-
CNX
2 stops25h 20m
Qatar Airways
Deal found 2/7฿45,882

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 3 July 2026.

Round-trip from

฿26,631

One-way from

฿20,447

Popular in

April

Cheapest in

October

Average price

฿36,074
ซาอุเดียแอร์ไลน์
  • ซาอุเดียแอร์ไลน์
  • 22/10-7/11
  • 2 total stops
  • 66h 50m total
  • Thailand to Washington, D.C.
Search Deals
AIR PREMIA
  • AIR PREMIA
  • 8/9
  • 1 total stop
  • 23h 05m total
  • Thailand to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (฿262,364 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (฿70,148 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 3 July 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

Thu 17/9

09:50-11:05

1 stop36h 15m

Washington, D.C. Dulles Intl

Mon 21/9

13:15-01:05

1 stop24h 50m

฿34,744

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 18/7

23:30-23:20

2 stops34h 50m

Washington, D.C. Dulles Intl

Sat 8/8

14:54-13:35

2 stops35h 41m

฿35,974

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 4/10

02:35-22:56

2 stops31h 21m

Washington, D.C. Dulles Intl

Wed 14/10

07:09-23:35

2 stops29h 26m

฿37,271

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 6/10

09:35-15:35

1 stop41h 00m

Washington, D.C. Dulles Intl

Wed 14/10

14:47-09:35

2 stops31h 48m

฿37,570

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 22/7

15:45-15:50

2 stops35h 05m

Washington, D.C. Dulles Intl

Mon 10/8

17:41-09:35

3 stops28h 54m

฿37,636

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 18/7

15:45-15:50

2 stops35h 05m

Washington, D.C. Dulles Intl

Sat 8/8

14:35-09:35

3 stops32h 00m

฿37,636

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 21/7

09:15-15:40

1 stop41h 25m

Washington, D.C. Dulles Intl

Tue 28/7

11:05-07:15

1 stop33h 10m

฿37,936

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 18/8

09:35-17:37

2 stops43h 02m

Washington, D.C. Dulles Intl

Wed 26/8

13:00-09:35

2 stops33h 35m

฿38,002

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 8/10

15:45-22:30

3 stops41h 45m

Washington, D.C. Dulles Intl

Wed 14/10

18:37-09:35

2 stops27h 58m

฿38,069

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 30/7

09:35-15:50

1 stop41h 15m

Washington, D.C. Dulles Intl

Thu 6/8

15:39-09:35

3 stops30h 56m

฿38,268

Flights are sorted by cheapest return flights first.

Deals found on 29/6

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 ฿15,693). Flying from Thailand to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of ฿39,133). 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 90 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 3 July 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
1,220 reviews
Check prices

Comfort

8.3

Crew

8.7

Overall

8.4

Entertainment

8.2

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
1,220 reviews
Korean Air
8.4
Very Good
1,220 reviews
Check prices

Comfort

8.3

Crew

8.7

Overall

8.4

Entertainment

8.2

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
1,260 reviews
Korean Air
8.4
Very Good
1,220 reviews
Check prices

Comfort

8.3

Crew

8.7

Overall

8.4

Entertainment

8.2

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
9,931 reviews
Korean Air
8.4
Very Good
1,220 reviews
Check prices

Comfort

8.3

Crew

8.7

Overall

8.4

Entertainment

8.2

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
1,473 reviews
Korean Air
8.4
Very Good
1,220 reviews
Check prices

Comfort

8.3

Crew

8.7

Overall

8.4

Entertainment

8.2

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?

    Korean Air, เดลต้า, and United Airlines can get you from Thailand to Washington, D.C. Dulles Intl Airport in just under 34h 50m. Your travel time can differ by up to 6h 10m. Thailand and Washington, D.C. Dulles Intl Airport are separated by a distance of 14149 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 Chiang Mai - 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 ฿15,693). Flying from Thailand to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of ฿39,133). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 4 airlines flying from Thailand to Dulles Intl

Discover the top 4 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 3 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest฿32,141Average฿33,745FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
เอทิฮัดแอร์เวย์Cheapest฿33,165Average฿33,565FlexibilityNo cancel feeOn-time75%
Search เอทิฮัดแอร์เวย์ flights
Korean AirCheapest฿33,523Average฿36,642FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
ANACheapest฿36,398Average฿41,477FlexibilityNo cancel feeOn-time80%
Search ANA 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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