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Cheap flights from Thailand to Washington, D.C. Dulles Intl Airport from ฿20,878

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 15/12. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
13 Aug — 20 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 14 July 2026.

Tue 22/915:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sun 18/1018:50
IAD
-
BKK
1 stop31h 55m
ซาอุเดียแอร์ไลน์
Deal found 13/7฿30,598
Fri 25/909:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Tue 27/1010:35
IAD
-
BKK
2 stops31h 35m
United Airlines
Deal found 10/7฿34,039
Thu 27/807:00
BKK
-
IAD
2 stops33h 55m
United Airlines
Fri 28/808:20
IAD
-
BKK
2 stops33h 15m
United Airlines
Deal found 10/7฿34,072
Wed 15/709:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Thu 13/808:20
IAD
-
BKK
2 stops33h 15m
United Airlines
Deal found 14/7฿34,106
Sat 26/909:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Wed 28/1008:16
IAD
-
BKK
2 stops29h 04m
United Airlines
Deal found 10/7฿34,139
Wed 14/1009:35
BKK
-
IAD
1 stop41h 00m
United Airlines
Wed 28/1015:34
IAD
-
BKK
3 stops32h 56m
United Airlines
Deal found 11/7฿34,173
Mon 13/709:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Mon 20/717:42
IAD
-
BKK
3 stops28h 53m
United Airlines
Deal found 12/7฿34,239
Thu 3/915:25
BKK
-
IAD
1 stop35h 20m
Multiple Airlines
Wed 16/915:10
IAD
-
BKK
1 stop28h 35m
Multiple Airlines
Deal found 10/7฿34,306
Thu 12/1109:10
BKK
-
IAD
2 stops27h 20m
United Airlines
Tue 9/318:50
IAD
-
BKK
2 stops28h 40m
United Airlines
Deal found 11/7฿34,340
Mon 2/1109:10
BKK
-
IAD
2 stops38h 36m
United Airlines
Fri 6/1122:23
IAD
-
BKK
2 stops49h 07m
United Airlines
Deal found 12/7฿34,440
Thu 5/1119:45
CNX
-
IAD
2 stops32h 10m
Qatar Airways
Mon 9/1120:05
IAD
-
CNX
2 stops25h 20m
Qatar Airways
Deal found 9/7฿44,895
Wed 4/1100:15
CNX
-
IAD
1 stop21h 35m
Korean Air
Mon 9/1111:50
IAD
-
CNX
1 stop23h 05m
Korean Air
Deal found 9/7฿45,363

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 14 July 2026.

Round-trip from

฿30,598

One-way from

฿20,878

Popular in

April

Cheapest in

October

Average price

฿36,244
ซาอุเดียแอร์ไลน์
  • ซาอุเดียแอร์ไลน์
  • 22/9-18/10
  • 2 total stops
  • 67h 15m total
  • Thailand to Washington, D.C.
Search Deals
STARLUX Airlines
  • STARLUX Airlines
  • 15/12
  • 2 total stops
  • 47h 58m total
  • Thailand to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (฿215,928 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (฿65,938 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 14 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 27/8

07:00-05:55

2 stops33h 55m

Washington, D.C. Dulles Intl

Fri 28/8

08:20-04:35

2 stops33h 15m

฿34,072

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 12/11

09:10-21:04

2 stops23h 54m

Washington, D.C. Dulles Intl

Tue 9/3

12:20-05:10

1 stop28h 50m

฿34,340

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 22/12

16:55-11:30

3 stops30h 35m

Washington, D.C. Dulles Intl

Thu 7/1

11:10-05:10

1 stop30h 00m

฿37,981

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 1/11

03:00-15:55

1 stop24h 55m

Washington, D.C. Dulles Intl

Fri 6/11

20:05-06:40

1 stop22h 35m

฿39,551

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 4/11

16:55-16:34

3 stops35h 39m

Washington, D.C. Dulles Intl

Tue 22/12

22:17-00:20

2 stops38h 03m

฿44,829

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 7/8

09:35-19:02

2 stops44h 27m

Washington, D.C. Dulles Intl

Tue 11/8

10:35-09:35

3 stops36h 00m

฿44,996

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 29/7

07:00-00:45

2 stops28h 45m

Washington, D.C. Dulles Intl

Thu 27/8

13:00-09:35

2 stops33h 35m

฿45,129
Fastest return journey

Chiang MaiWashington, D.C.

CNX - IAD

CNXIAD

Chiang Mai

Wed 4/11

00:15-09:50

1 stop21h 35m

Washington, D.C. Dulles Intl

Mon 9/11

11:50-22:55

1 stop23h 05m

฿45,363

Chiang MaiWashington, D.C.

CNX - IAD

CNXIAD

Chiang Mai

Sun 25/10

00:15-10:50

1 stop21h 35m

Washington, D.C. Dulles Intl

Fri 30/10

12:50-22:55

1 stop23h 05m

฿45,463

Chiang MaiWashington, D.C.

CNX - IAD

CNXIAD

Chiang Mai

Sun 23/8

11:35-23:59

2 stops47h 24m

Washington, D.C. Dulles Intl

Sun 30/8

07:00-10:25

2 stops40h 25m

฿46,532

Flights are sorted by cheapest return flights first.

Deals found on 11/7

Showing 1-10 of 42 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 ฿15,767). Flying from Thailand to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of ฿39,317). 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 14 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
1,222 reviews
Check prices

Comfort

8.3

Boarding

8.5

Overall

8.4

Food

8.1

Entertainment

8.2

Crew

8.7

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
1,222 reviews
Korean Air
8.4
Very Good
1,222 reviews
Check prices

Comfort

8.3

Boarding

8.5

Overall

8.4

Food

8.1

Entertainment

8.2

Crew

8.7

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
9,988 reviews
Korean Air
8.4
Very Good
1,222 reviews
Check prices

Comfort

8.3

Boarding

8.5

Overall

8.4

Food

8.1

Entertainment

8.2

Crew

8.7

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
1,222 reviews
Check prices

Comfort

8.3

Boarding

8.5

Overall

8.4

Food

8.1

Entertainment

8.2

Crew

8.7

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, Qatar Airways, and Korean Air 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 20m. 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 ฿15,767). Flying from Thailand to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of ฿39,317). 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 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 14 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest฿27,330Average฿35,279FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
เอทิฮัดแอร์เวย์Cheapest฿33,321Average฿33,723FlexibilityNo cancel feeOn-time75%
Search เอทิฮัดแอร์เวย์ flights
Korean AirCheapest฿33,681Average฿36,815FlexibilityNo cancel feeOn-time81%
Search Korean Air 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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