Find flights
When to book
Airlines
FAQs

Cheap flights from Thailand to Washington, D.C. Dulles Intl Airport from ฿21,257

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 22/10. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
30 Aug — 6 Sep1
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 31 July 2026.

Sun 13/915:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sun 20/918:50
IAD
-
BKK
1 stop31h 55m
ซาอุเดียแอร์ไลน์
Deal found 30/7฿26,747
Sun 20/915:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sun 27/918:50
IAD
-
BKK
1 stop31h 55m
ซาอุเดียแอร์ไลน์
Deal found 27/7฿27,417
Thu 17/915:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sun 20/918:50
IAD
-
BKK
1 stop31h 55m
ซาอุเดียแอร์ไลน์
Deal found 27/7฿30,162
Sun 13/915:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Fri 18/918:50
IAD
-
BKK
1 stop31h 55m
ซาอุเดียแอร์ไลน์
Deal found 31/7฿30,396
Sun 20/909:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Sun 27/906:10
IAD
-
BKK
2 stops35h 25m
United Airlines
Deal found 27/7฿34,079
Tue 4/809:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Mon 10/806:10
IAD
-
BKK
2 stops35h 25m
United Airlines
Deal found 29/7฿34,213
Wed 9/909:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Sun 13/915:15
IAD
-
BKK
2 stops26h 20m
United Airlines
Deal found 29/7฿34,279
Wed 12/821:35
BKK
-
IAD
1 stop29h 15m
ANA
Thu 20/813:10
IAD
-
BKK
2 stops28h 25m
ANA
Deal found 26/7฿34,380
Tue 4/809:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Tue 11/822:27
IAD
-
BKK
2 stops43h 08m
United Airlines
Deal found 29/7฿34,413
Thu 19/1110:10
CNX
-
IAD
2 stops40h 00m
Multiple Airlines
Fri 2/422:20
IAD
-
CNX
2 stops33h 50m
Multiple Airlines
Deal found 27/7฿38,364
Tue 1/917:20
CNX
-
IAD
2 stops47h 20m
STARLUX Airlines
Tue 15/917:57
IAD
-
CNX
2 stops35h 08m
STARLUX Airlines
Deal found 31/7฿40,439
Tue 1/921:10
CNX
-
IAD
2 stops29h 30m
Multiple Airlines
Tue 15/921:00
IAD
-
CNX
2 stops25h 20m
Multiple Airlines
Deal found 31/7฿41,176

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 31 July 2026.

Round-trip from

฿26,747

One-way from

฿21,257

Popular in

April

Cheapest in

October

Average price

฿44,824
ซาอุเดียแอร์ไลน์
  • ซาอุเดียแอร์ไลน์
  • 13/9-20/9
  • 2 total stops
  • 67h 15m total
  • Thailand to Washington, D.C.
Search Deals
STARLUX Airlines
  • STARLUX Airlines
  • 22/10
  • 2 total stops
  • 27h 30m total
  • Thailand to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (฿179,998 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (฿62,536 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 31 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

Sun 20/9

09:35-10:05

1 stop35h 30m

Washington, D.C. Dulles Intl

Sun 27/9

06:10-04:35

2 stops35h 25m

฿34,079

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 13/9

07:00-00:32

2 stops28h 32m

Washington, D.C. Dulles Intl

Sat 26/9

17:20-04:35

2 stops48h 15m

฿34,447

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 28/8

15:45-09:28

3 stops28h 43m

Washington, D.C. Dulles Intl

Fri 4/9

08:20-09:35

2 stops38h 15m

฿34,748

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 9/9

09:35-10:05

1 stop35h 30m

Washington, D.C. Dulles Intl

Sun 13/9

06:15-23:55

2 stops30h 40m

฿35,752

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 8/9

07:00-00:44

2 stops28h 44m

Washington, D.C. Dulles Intl

Tue 6/10

12:15-04:35

1 stop29h 20m

฿35,786

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 19/11

07:10-08:58

2 stops37h 48m

Washington, D.C. Dulles Intl

Mon 23/11

11:10-05:10

1 stop30h 00m

฿35,819

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 10/8

09:35-22:59

2 stops48h 24m

Washington, D.C. Dulles Intl

Wed 19/8

15:40-04:35

2 stops25h 55m

฿35,853

Chiang MaiWashington, D.C.

CNX - IAD

CNXIAD

Chiang Mai

Thu 19/11

10:10-14:10

2 stops40h 00m

Washington, D.C. Dulles Intl

Fri 2/4

22:20-19:10

2 stops33h 50m

฿38,364

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 8/9

10:50-05:40

2 stops29h 50m

Washington, D.C. Dulles Intl

Tue 6/10

09:38-09:45

2 stops37h 07m

฿38,631

Chiang MaiWashington, D.C.

CNX - IAD

CNXIAD

Chiang Mai

Thu 19/11

10:10-15:40

3 stops41h 30m

Washington, D.C. Dulles Intl

Fri 2/4

17:45-19:10

2 stops38h 25m

฿42,113

Flights are sorted by cheapest return flights first.

Deals found on 26/7

Showing 1-10 of 56 resultsSorted by cheapest first
1
2
3
...
6

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, March is the cheapest month in which you can book a flight from Thailand to Washington, D.C. Dulles Intl Airport (average of ฿34,849). Flying from Thailand to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of ฿41,176). 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 31 July 2026.
Check out reviews from past customers who have flown with Korean Air,Qatar Airways, 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
1,223 reviews
Check prices

Comfort

8.3

Overall

8.4

Entertainment

8.2

Food

8.1

Boarding

8.5

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
1,223 reviews
Korean Air
8.4
Very Good
1,223 reviews
Check prices

Comfort

8.3

Overall

8.4

Entertainment

8.2

Food

8.1

Boarding

8.5

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!!
Qatar Airways
7.4
Good
3,739 reviews
Korean Air
8.4
Very Good
1,223 reviews
Check prices

Comfort

8.3

Overall

8.4

Entertainment

8.2

Food

8.1

Boarding

8.5

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
10,063 reviews
Korean Air
8.4
Very Good
1,223 reviews
Check prices

Comfort

8.3

Overall

8.4

Entertainment

8.2

Food

8.1

Boarding

8.5

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
1,499 reviews
Korean Air
8.4
Very Good
1,223 reviews
Check prices

Comfort

8.3

Overall

8.4

Entertainment

8.2

Food

8.1

Boarding

8.5

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, ออสเตรียนแอร์ไลน์, and Emirates can get you from Thailand to Washington, D.C. Dulles Intl Airport in just under 31h 30m. Your travel time can differ by up to 10h. Thailand and Washington, D.C. Dulles Intl Airport are separated by a distance of 14124 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, March is the cheapest month in which you can book a flight from Thailand to Washington, D.C. Dulles Intl Airport (average of ฿34,849). Flying from Thailand to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of ฿41,176). 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 Baltimore flights
Chiang Mai to Reagan-National flights
Chiang Mai to Dulles Intl 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 31 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest฿27,389Average฿35,339FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
เอทิฮัดแอร์เวย์Cheapest฿33,393Average฿33,796FlexibilityNo cancel feeOn-time75%
Search เอทิฮัดแอร์เวย์ flights
Korean AirCheapest฿33,754Average฿36,894FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
Qatar AirwaysCheapest฿37,628Average฿41,952FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book With Flexibility

Our users can plan ahead with confidence and find flights with no change fees.

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.