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Cheap flights from Thailand to Washington, D.C. Dulles Intl Airport from ฿20,482

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
26 Jul — 2 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 26 June 2026.

Wed 30/907:00
BKK
-
IAD
2 stops35h 19m
United Airlines
Sun 4/1008:20
IAD
-
BKK
2 stops33h 15m
United Airlines
Deal found 24/6฿31,290
Thu 26/1116:55
BKK
-
IAD
1 stop26h 14m
ANA
Thu 4/208:15
IAD
-
BKK
2 stops28h 05m
ANA
Deal found 24/6฿31,557
Tue 25/807:00
BKK
-
IAD
2 stops35h 00m
United Airlines
Fri 28/822:41
IAD
-
BKK
2 stops38h 14m
United Airlines
Deal found 24/6฿31,624
Thu 27/807:00
BKK
-
IAD
2 stops24h 56m
United Airlines
Tue 29/910:10
IAD
-
BKK
3 stops36h 25m
United Airlines
Deal found 25/6฿31,891
Wed 1/707:00
BKK
-
IAD
2 stops27h 19m
United Airlines
Tue 7/712:50
IAD
-
BKK
1 stop28h 45m
United Airlines
Deal found 22/6฿31,958
Fri 3/707:00
BKK
-
IAD
2 stops25h 00m
United Airlines
Sat 25/715:15
IAD
-
BKK
2 stops31h 20m
United Airlines
Deal found 24/6฿31,991
Mon 22/615:45
BKK
-
IAD
3 stops40h 15m
United Airlines
Thu 25/606:30
IAD
-
BKK
2 stops35h 05m
United Airlines
Deal found 21/6฿32,091
Thu 10/917:20
CNX
-
IAD
2 stops47h 20m
STARLUX Airlines
Sun 13/917:57
IAD
-
CNX
2 stops35h 23m
STARLUX Airlines
Deal found 23/6฿41,832
Mon 10/820:00
CNX
-
IAD
2 stops55h 45m
Multiple Airlines
Mon 17/822:20
IAD
-
CNX
2 stops33h 50m
Multiple Airlines
Deal found 26/6฿42,832
Sun 9/820:00
CNX
-
IAD
2 stops54h 30m
สวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Sun 16/820:20
IAD
-
CNX
2 stops30h 25m
สวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Deal found 25/6฿43,967
Mon 10/820:00
CNX
-
IAD
2 stops55h 45m
สวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Mon 17/818:30
IAD
-
CNX
3 stops32h 15m
สวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Deal found 26/6฿46,035
Mon 20/720:00
CNX
-
IAD
2 stops55h 45m
Multiple Airlines
Mon 27/722:20
IAD
-
CNX
2 stops36h 40m
Multiple Airlines
Deal found 22/6฿47,202

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 26 June 2026.

Round-trip from

฿31,290

One-way from

฿20,482

Popular in

April

Cheapest in

October

Average price

฿32,925
United Airlines
  • United Airlines
  • 30/9-4/10
  • 4 total stops
  • 68h 34m total
  • Thailand to Washington, D.C.
Search Deals
แอร์แคนาดา
  • แอร์แคนาดา
  • 1/10
  • 2 total stops
  • 42h 15m total
  • Thailand to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (฿275,847 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (฿71,783 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 26 June 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 20/10

21:40-11:05

1 stop24h 25m

Washington, D.C. Dulles Intl

Sun 25/10

12:50-00:45

1 stop24h 55m

฿35,527

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 20/10

09:35-13:59

2 stops39h 24m

Washington, D.C. Dulles Intl

Sun 25/10

12:15-05:10

1 stop29h 55m

฿36,594

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 22/7

15:45-15:50

2 stops35h 05m

Washington, D.C. Dulles Intl

Sat 8/8

09:37-09:35

2 stops36h 58m

฿37,595

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 2/12

21:30-09:50

1 stop24h 20m

Washington, D.C. Dulles Intl

Thu 4/2

10:05-13:25

2 stops39h 20m

฿38,096
Fastest return journey

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 31/8

09:50-23:39

2 stops24h 49m

Washington, D.C. Dulles Intl

Wed 30/9

13:15-23:35

1 stop23h 20m

฿38,663

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 17/7

23:30-00:41

2 stops36h 11m

Washington, D.C. Dulles Intl

Fri 14/8

13:30-23:35

1 stop23h 05m

฿39,263

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 18/8

23:30-23:59

2 stops35h 29m

Washington, D.C. Dulles Intl

Wed 26/8

13:30-23:35

1 stop23h 05m

฿39,296

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 28/7

02:35-00:08

2 stops32h 33m

Washington, D.C. Dulles Intl

Thu 27/8

13:30-23:35

1 stop23h 05m

฿39,530

Chiang MaiWashington, D.C.

CNX - IAD

CNXIAD

Chiang Mai

Thu 10/9

17:20-05:40

2 stops47h 20m

Washington, D.C. Dulles Intl

Sun 13/9

17:57-16:20

2 stops35h 23m

฿41,832

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 23/7

12:50-16:45

1 stop38h 55m

Washington, D.C. Dulles Intl

Mon 10/8

20:20-09:50

1 stop26h 30m

฿43,333

Flights are sorted by cheapest return flights first.

Deals found on 25/6

Showing 1-10 of 53 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 ฿15,745). Flying from Thailand to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of ฿39,263). 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 26 June 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
1,218 reviews
Check prices

Food

8.1

Overall

8.4

Boarding

8.5

Crew

8.7

Entertainment

8.2

Comfort

8.3

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
1,218 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Food

8.1

Overall

8.4

Boarding

8.5

Crew

8.7

Entertainment

8.2

Comfort

8.3

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
1,252 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Food

8.1

Overall

8.4

Boarding

8.5

Crew

8.7

Entertainment

8.2

Comfort

8.3

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
9,893 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Food

8.1

Overall

8.4

Boarding

8.5

Crew

8.7

Entertainment

8.2

Comfort

8.3

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
7.3
Good
3,731 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Food

8.1

Overall

8.4

Boarding

8.5

Crew

8.7

Entertainment

8.2

Comfort

8.3

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
1,463 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Food

8.1

Overall

8.4

Boarding

8.5

Crew

8.7

Entertainment

8.2

Comfort

8.3

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, ANA, and STARLUX Airlines can get you from Thailand to Washington, D.C. Dulles Intl Airport in just under 26h 14m. Your travel time can differ by up to 21h 06m. 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 ฿15,745). Flying from Thailand to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of ฿39,263). 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 Reagan-National flights
Chiang Mai to Dulles Intl flights
Chiang Mai to Baltimore 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 26 June 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest฿32,248Average฿33,888FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
เอทิฮัดแอร์เวย์Cheapest฿33,276Average฿33,677FlexibilityNo cancel feeOn-time75%
Search เอทิฮัดแอร์เวย์ flights
Korean AirCheapest฿33,635Average฿36,312FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
ANACheapest฿36,519Average฿41,616FlexibilityNo cancel feeOn-time80%
Search ANA flights
Qatar AirwaysCheapest฿37,496Average฿41,127FlexibilityNo 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.

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