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Cheap flights from Thailand to Washington, D.C. Dulles Intl Airport from ฿20,581

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 30/10. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
7 Aug — 14 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 8 July 2026.

Wed 23/1215:20
BKK
-
IAD
1 stop35h 25m
ซาอุเดียแอร์ไลน์
Sat 2/118:10
IAD
-
BKK
1 stop31h 30m
ซาอุเดียแอร์ไลน์
Deal found 7/7฿28,307
Tue 13/1015:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sat 31/1018:10
IAD
-
BKK
1 stop32h 30m
ซาอุเดียแอร์ไลน์
Deal found 8/7฿29,739
Wed 30/909:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Sun 4/1008:20
IAD
-
BKK
2 stops33h 15m
United Airlines
Deal found 7/7฿34,034
Thu 27/809:35
BKK
-
IAD
2 stops32h 03m
United Airlines
Fri 28/810:35
IAD
-
BKK
3 stops36h 00m
United Airlines
Deal found 7/7฿34,068
Tue 13/1009:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Sat 31/1022:23
IAD
-
BKK
2 stops38h 57m
United Airlines
Deal found 8/7฿34,134
Mon 31/807:00
BKK
-
IAD
2 stops28h 44m
United Airlines
Wed 30/917:45
IAD
-
BKK
2 stops28h 50m
United Airlines
Deal found 8/7฿34,567
Wed 8/715:45
BKK
-
IAD
3 stops40h 37m
United Airlines
Wed 29/714:51
IAD
-
BKK
2 stops31h 44m
United Airlines
Deal found 8/7฿35,267
Wed 8/713:10
BKK
-
IAD
2 stops28h 29m
Multiple Airlines
Wed 29/713:20
IAD
-
BKK
1 stop44h 50m
Multiple Airlines
Deal found 7/7฿35,333
Sun 30/822:45
BKK
-
IAD
1 stop23h 05m
Multiple Airlines
Tue 8/915:10
IAD
-
BKK
1 stop34h 00m
Multiple Airlines
Deal found 5/7฿35,367
Thu 16/723:05
CNX
-
IAD
1 stop31h 25m
Air China
Tue 28/723:00
IAD
-
CNX
1 stop35h 50m
Air China
Deal found 4/7฿42,060
Thu 16/717:20
CNX
-
IAD
2 stops48h 19m
Multiple Airlines
Thu 30/718:14
IAD
-
CNX
2 stops35h 06m
Multiple Airlines
Deal found 4/7฿43,292
Tue 14/711:35
CNX
-
IAD
2 stops30h 04m
Multiple Airlines
Tue 28/718:14
IAD
-
CNX
2 stops29h 11m
Multiple Airlines
Deal found 4/7฿44,491

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 8 July 2026.

Round-trip from

฿28,307

One-way from

฿20,581

Popular in

April

Cheapest in

October

Average price

฿36,132
ซาอุเดียแอร์ไลน์
  • ซาอุเดียแอร์ไลน์
  • 23/12-2/1
  • 2 total stops
  • 66h 55m total
  • Thailand to Washington, D.C.
Search Deals
ซาอุเดียแอร์ไลน์
  • ซาอุเดียแอร์ไลน์
  • 30/10
  • 1 total stop
  • 34h 25m total
  • Thailand to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (฿259,902 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (฿70,052 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 8 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

Tue 13/10

15:25-15:45

1 stop35h 20m

Washington, D.C. Dulles Intl

Sat 31/10

18:10-13:40

1 stop32h 30m

฿29,739

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 21/12

09:10-09:10

1 stop36h 00m

Washington, D.C. Dulles Intl

Mon 11/1

08:35-05:10

2 stops32h 35m

฿34,034

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 13/10

09:35-10:05

1 stop35h 30m

Washington, D.C. Dulles Intl

Sat 31/10

22:23-00:20

2 stops38h 57m

฿34,134

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 20/10

09:35-17:44

2 stops43h 09m

Washington, D.C. Dulles Intl

Sun 25/10

06:40-11:30

2 stops41h 50m

฿34,234

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 11/10

09:35-00:58

2 stops50h 23m

Washington, D.C. Dulles Intl

Sun 18/10

17:45-09:35

2 stops28h 50m

฿37,231

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 18/10

15:45-11:55

3 stops31h 10m

Washington, D.C. Dulles Intl

Thu 29/10

13:20-11:30

2 stops35h 10m

฿38,164

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 23/12

16:55-11:43

3 stops30h 48m

Washington, D.C. Dulles Intl

Sat 2/1

08:25-11:30

3 stops39h 05m

฿42,959

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 3/8

09:35-06:20

2 stops31h 45m

Washington, D.C. Dulles Intl

Mon 10/8

13:15-09:35

3 stops33h 20m

฿44,758

Chiang MaiWashington, D.C.

CNX - IAD

CNXIAD

Chiang Mai

Thu 5/11

19:45-15:55

2 stops32h 10m

Washington, D.C. Dulles Intl

Mon 9/11

20:05-09:25

2 stops25h 20m

฿44,924
Fastest return journey

Chiang MaiWashington, D.C.

CNX - IAD

CNXIAD

Chiang Mai

Tue 3/11

00:15-09:50

1 stop21h 35m

Washington, D.C. Dulles Intl

Sun 8/11

11:50-22:55

1 stop23h 05m

฿45,424

Flights are sorted by cheapest return flights first.

Deals found on 5/7

Showing 1-10 of 49 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 ฿15,718). Flying from Thailand to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of ฿39,196). 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 8 July 2026.
Check out reviews from past customers who have flown with Korean Air,United Airlines, andเอทิฮัดแอร์เวย์ 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
1,221 reviews
Check prices

Comfort

8.3

Entertainment

8.2

Food

8.1

Crew

8.7

Boarding

8.5

Overall

8.4

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
1,221 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Comfort

8.3

Entertainment

8.2

Food

8.1

Crew

8.7

Boarding

8.5

Overall

8.4

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
9,953 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Comfort

8.3

Entertainment

8.2

Food

8.1

Crew

8.7

Boarding

8.5

Overall

8.4

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
1,477 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Comfort

8.3

Entertainment

8.2

Food

8.1

Crew

8.7

Boarding

8.5

Overall

8.4

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?

    ซาอุเดียแอร์ไลน์, United Airlines, and Qatar Airways can get you from Thailand to Washington, D.C. Dulles Intl Airport in just under 32h 10m. Your travel time can differ by up to 3h 50m. 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 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 ฿15,718). Flying from Thailand to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of ฿39,196). 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 3 airlines flying from Thailand to Dulles Intl

Discover the top 3 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 8 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest฿27,247Average฿35,171FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
เอทิฮัดแอร์เวย์Cheapest฿33,219Average฿33,620FlexibilityNo cancel feeOn-time75%
Search เอทิฮัดแอร์เวย์ flights
Korean AirCheapest฿33,578Average฿36,702FlexibilityNo cancel feeOn-time81%
Search Korean Air flights

Fly with Cheapflights

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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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