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Cheap flights from Thailand to Washington, D.C. Dulles Intl Airport from ฿19,515

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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
2 May — 9 May1
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 2 April 2026.

Mon 15/609:35
BKK
-
IAD
2 stops61h 20m
United Airlines
Mon 20/722:20
IAD
-
BKK
2 stops48h 15m
United Airlines
Deal found 31/3฿25,900
Tue 16/607:00
BKK
-
IAD
2 stops59h 26m
United Airlines
Mon 20/722:20
IAD
-
BKK
2 stops48h 15m
United Airlines
Deal found 31/3฿26,193
Thu 27/807:00
BKK
-
IAD
2 stops26h 43m
United Airlines
Thu 10/908:29
IAD
-
BKK
2 stops28h 26m
United Airlines
Deal found 29/3฿26,356
Mon 5/1009:35
BKK
-
IAD
2 stops31h 28m
United Airlines
Mon 9/1106:00
IAD
-
BKK
2 stops30h 20m
United Airlines
Deal found 31/3฿26,389
Thu 17/909:35
BKK
-
IAD
2 stops31h 25m
United Airlines
Thu 15/1006:00
IAD
-
BKK
2 stops30h 55m
United Airlines
Deal found 2/4฿26,584
Tue 6/1009:35
BKK
-
IAD
2 stops45h 58m
United Airlines
Tue 3/1112:20
IAD
-
BKK
2 stops35h 05m
United Airlines
Deal found 31/3฿26,845
Tue 28/422:45
BKK
-
IAD
1 stop23h 05m
AIR PREMIA
Fri 7/813:20
IAD
-
BKK
1 stop44h 50m
AIR PREMIA
Deal found 30/3฿29,516
Tue 12/522:45
BKK
-
IAD
1 stop23h 05m
AIR PREMIA
Wed 3/613:20
IAD
-
BKK
1 stop44h 50m
AIR PREMIA
Deal found 29/3฿29,549
Sat 23/507:00
BKK
-
IAD
2 stops25h 09m
United Airlines
Fri 25/917:30
IAD
-
BKK
2 stops29h 05m
United Airlines
Deal found 29/3฿32,644
Wed 7/1009:35
BKK
-
IAD
2 stops45h 58m
United Airlines
Sun 18/1006:30
IAD
-
BKK
2 stops35h 05m
United Airlines
Deal found 31/3฿33,132
Tue 10/1100:15
CNX
-
IAD
1 stop21h 35m
Korean Air
Sun 15/1111:50
IAD
-
CNX
1 stop23h 05m
Korean Air
Deal found 29/3฿35,674
Wed 19/811:35
CNX
-
IAD
1 stop21h 55m
Multiple Airlines
Thu 24/917:54
IAD
-
CNX
2 stops29h 31m
Multiple Airlines
Deal found 30/3฿40,006

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 2 April 2026.

Round-trip from

฿25,900

One-way from

฿19,515

Popular in

April

Cheapest in

October

Average price

฿53,527
United Airlines
  • United Airlines
  • 15/6-20/7
  • 4 total stops
  • 109h 35m total
  • Thailand to Washington, D.C.
Search Deals
1/5
  • 1/5
  • 2 total stops
  • 32h 50m total
  • Thailand to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (฿247,328 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (฿46,075 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 2 April 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

Mon 15/6

09:35-11:55

2 stops61h 20m

Washington, D.C. Dulles Intl

Mon 20/7

22:20-09:35

2 stops48h 15m

฿25,900

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 6/5

19:00-16:05

1 stop32h 05m

Washington, D.C. Dulles Intl

Wed 13/5

11:00-19:50

1 stop21h 50m

฿33,979

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 6/5

09:05-08:40

1 stop34h 35m

Washington, D.C. Dulles Intl

Wed 13/5

11:00-20:45

1 stop22h 45m

฿35,902
Fastest return journey

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 12/4

02:50-16:10

1 stop24h 20m

Washington, D.C. Dulles Intl

Wed 22/4

11:00-18:20

1 stop20h 20m

฿36,227

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 17/9

15:45-11:47

3 stops31h 02m

Washington, D.C. Dulles Intl

Thu 15/10

06:00-23:55

2 stops30h 55m

฿36,781

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 25/5

02:35-00:15

2 stops32h 40m

Washington, D.C. Dulles Intl

Wed 1/7

08:27-13:35

2 stops42h 08m

฿40,006

Chiang MaiWashington, D.C.

CNX - IAD

CNXIAD

Chiang Mai

Wed 19/8

20:00-22:30

2 stops61h 30m

Washington, D.C. Dulles Intl

Sat 19/9

17:38-10:25

2 stops29h 47m

฿40,560

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

Fri 15/5

16:50-20:29

3 stops38h 39m

Washington, D.C. Dulles Intl

Fri 29/5

15:10-03:40

2 stops25h 30m

฿40,886

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 6/5

09:50-23:44

2 stops24h 54m

Washington, D.C. Dulles Intl

Thu 25/6

08:27-01:05

2 stops29h 38m

฿41,277

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 6/5

21:40-23:32

2 stops36h 52m

Washington, D.C. Dulles Intl

Wed 13/5

19:38-23:35

2 stops40h 57m

฿41,570

Flights are sorted by cheapest return flights first.

Deals found on 1/4

Showing 1-10 of 59 resultsSorted by cheapest first
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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, May is the cheapest month in which you can book a flight from Thailand to Washington, D.C. Dulles Intl Airport (average of ฿31,145). Flying from Thailand to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of ฿37,042). 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.

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 2 April 2026.
Check out reviews from past customers who have flown with Korean Air,ANA, andQatar Airways 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
1,203 reviews
Check prices

Boarding

8.5

Crew

8.7

Overall

8.4

Comfort

8.3

Food

8.1

Entertainment

8.2

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
1,203 reviews
Korean Air
8.4
Very Good
1,203 reviews
Check prices

Boarding

8.5

Crew

8.7

Overall

8.4

Comfort

8.3

Food

8.1

Entertainment

8.2

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
8.4
Very Good
1,163 reviews
Korean Air
8.4
Very Good
1,203 reviews
Check prices

Boarding

8.5

Crew

8.7

Overall

8.4

Comfort

8.3

Food

8.1

Entertainment

8.2

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
3,730 reviews
Korean Air
8.4
Very Good
1,203 reviews
Check prices

Boarding

8.5

Crew

8.7

Overall

8.4

Comfort

8.3

Food

8.1

Entertainment

8.2

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
9,532 reviews
Korean Air
8.4
Very Good
1,203 reviews
Check prices

Boarding

8.5

Crew

8.7

Overall

8.4

Comfort

8.3

Food

8.1

Entertainment

8.2

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
1,432 reviews
Korean Air
8.4
Very Good
1,203 reviews
Check prices

Boarding

8.5

Crew

8.7

Overall

8.4

Comfort

8.3

Food

8.1

Entertainment

8.2

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 EVA Air can get you from Thailand to Washington, D.C. Dulles Intl Airport in just under 21h 55m. Your travel time can differ by up to 39h 25m. 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, May is the cheapest month in which you can book a flight from Thailand to Washington, D.C. Dulles Intl Airport (average of ฿31,145). Flying from Thailand to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of ฿37,042). 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 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 2 April 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest฿31,613Average฿33,096FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
เอทิฮัดแอร์เวย์Cheapest฿32,497Average฿32,890FlexibilityNo cancel feeOn-time75%
Search เอทิฮัดแอร์เวย์ flights
Korean AirCheapest฿32,944Average฿35,530FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
ANACheapest฿34,517Average฿43,359FlexibilityNo cancel feeOn-time80%
Search ANA flights
Qatar AirwaysCheapest฿36,619Average฿40,165FlexibilityNo cancel feeOn-time68%
Search Qatar Airways 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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