Find flights
When to book
Airlines
FAQs

Cheap flights from Bangkok to Washington, D.C. Dulles Intl Airport from ฿20,272

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 21/5. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
4 Jun — 11 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Bangkok to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Bangkok to Dulles Intl
Explore the most affordable flight options available from Bangkok to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 May 2026.

Tue 20/1015:45
BKK
-
IAD
3 stops33h 18m
United Airlines
Wed 20/106:30
IAD
-
BKK
2 stops34h 40m
United Airlines
Deal found 1/5฿36,176
Sat 10/1015:45
BKK
-
IAD
3 stops36h 28m
United Airlines
Fri 23/1022:10
IAD
-
BKK
2 stops50h 15m
United Airlines
Deal found 4/5฿36,404
Sun 11/1003:00
BKK
-
IAD
1 stop23h 40m
Qatar Airways
Fri 23/1011:15
IAD
-
BKK
1 stop20h 50m
Qatar Airways
Deal found 4/5฿36,697
Sun 5/715:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sat 11/718:50
IAD
-
BKK
1 stop42h 15m
ซาอุเดียแอร์ไลน์
Deal found 4/5฿37,056
Thu 24/1214:40
BKK
-
IAD
2 stops37h 46m
Multiple Airlines
Sat 9/117:38
IAD
-
BKK
2 stops29h 32m
Multiple Airlines
Deal found 3/5฿37,382
Thu 15/1002:30
BKK
-
IAD
1 stop24h 10m
Qatar Airways
Sun 25/1020:05
IAD
-
BKK
1 stop23h 35m
Qatar Airways
Deal found 4/5฿37,512
Fri 1/515:45
BKK
-
IAD
3 stops36h 45m
United Airlines
Fri 8/518:33
IAD
-
BKK
2 stops28h 02m
United Airlines
Deal found 30/4฿37,675
Fri 24/715:20
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sat 1/818:50
IAD
-
BKK
1 stop42h 15m
ซาอุเดียแอร์ไลน์
Deal found 2/5฿37,740
Wed 20/508:00
BKK
-
IAD
2 stops26h 59m
Multiple Airlines
Wed 9/915:10
IAD
-
BKK
1 stop40h 00m
Multiple Airlines
Deal found 1/5฿37,773
Wed 6/523:30
BKK
-
IAD
2 stops35h 39m
Multiple Airlines
Wed 13/515:10
IAD
-
BKK
1 stop34h 00m
Multiple Airlines
Deal found 5/5฿37,838
Thu 18/609:35
BKK
-
IAD
2 stops44h 27m
United Airlines
Wed 15/714:51
IAD
-
BKK
2 stops31h 44m
United Airlines
Deal found 3/5฿37,936
Fri 3/715:20
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sat 25/718:50
IAD
-
BKK
1 stop31h 50m
ซาอุเดียแอร์ไลน์
Deal found 4/5฿38,066

Find flight deals from Bangkok to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Bangkok (TH1) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 5 May 2026.

Round-trip from

฿36,176

One-way from

฿20,272

Popular in

February

Cheapest in

July

Average price

฿38,718
United Airlines
  • United Airlines
  • 20/10-20/1
  • 5 total stops
  • 67h 58m total
  • Bangkok to Washington, D.C.
Search Deals
AIR PREMIA
  • AIR PREMIA
  • 21/5
  • 1 total stop
  • 23h 05m total
  • Bangkok to Washington, D.C.
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 0% potential price decrease (฿7,030 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Bangkok 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 5 May 2026.
Use the filters below to find and compare flights from Bangkok 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 11/10

03:00-15:40

1 stop23h 40m

Washington, D.C. Dulles Intl

Sat 24/10

21:00-06:15

1 stop22h 15m

฿36,697

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 15/10

20:00-08:55

1 stop23h 55m

Washington, D.C. Dulles Intl

Fri 23/10

21:00-07:15

1 stop23h 15m

฿36,697

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 1/6

19:00-18:20

1 stop34h 20m

Washington, D.C. Dulles Intl

Mon 29/6

21:00-19:25

1 stop35h 25m

฿38,490

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 20/5

15:45-09:24

3 stops28h 39m

Washington, D.C. Dulles Intl

Wed 9/9

17:15-09:35

3 stops29h 20m

฿39,631

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 1/6

23:30-00:13

2 stops35h 43m

Washington, D.C. Dulles Intl

Mon 29/6

06:00-23:35

2 stops30h 35m

฿42,499
Fastest return journey

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 17/10

03:00-15:40

1 stop23h 40m

Washington, D.C. Dulles Intl

Wed 21/10

11:15-19:05

1 stop20h 50m

฿43,118

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 18/6

15:45-19:25

3 stops38h 40m

Washington, D.C. Dulles Intl

Wed 15/7

12:48-09:35

3 stops33h 47m

฿46,084

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 16/5

01:00-18:20

1 stop28h 20m

Washington, D.C. Dulles Intl

Fri 22/5

21:00-13:45

1 stop29h 45m

฿46,247

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 18/5

19:00-18:20

1 stop34h 20m

Washington, D.C. Dulles Intl

Tue 2/6

21:00-15:25

2 stops31h 25m

฿46,670

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 4/6

19:55-18:20

2 stops33h 25m

Washington, D.C. Dulles Intl

Sat 20/6

21:00-13:25

1 stop29h 25m

฿47,746

Flights are sorted by cheapest return flights first.

Deals found on 30/4

Showing 1-10 of 40 resultsSorted by cheapest first
1
2
3
4

Best time to book a flight from Bangkok to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Bangkok 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 Bangkok to Washington, D.C. Dulles Intl Airport

How far ahead should I book a flight from Bangkok to Washington, D.C. Dulles Intl Airport?

The best time to book flights from Bangkok to Washington, D.C. Dulles Intl Airport is 35 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Bangkok to Washington, D.C. Dulles Intl Airport?

Currently, April is the cheapest month in which you can book a flight from Bangkok to Washington, D.C. Dulles Intl Airport (average of ฿15,383). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of ฿36,795). 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 much does it cost for a return flight from Bangkok to Washington, D.C. Dulles Intl Airport?

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 5 May 2026.
Check out reviews from past customers who have flown with Korean Air,ANA, andUnited Airlines from Bangkok 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
1,216 reviews
Check prices

Entertainment

8.2

Boarding

8.5

Food

8.1

Crew

8.7

Comfort

8.3

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
1,216 reviews
Korean Air
8.4
Very Good
1,216 reviews
Check prices

Entertainment

8.2

Boarding

8.5

Food

8.1

Crew

8.7

Comfort

8.3

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!!
ANA
8.3
Very Good
1,205 reviews
Korean Air
8.4
Very Good
1,216 reviews
Check prices

Entertainment

8.2

Boarding

8.5

Food

8.1

Crew

8.7

Comfort

8.3

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
9,683 reviews
Korean Air
8.4
Very Good
1,216 reviews
Check prices

Entertainment

8.2

Boarding

8.5

Food

8.1

Crew

8.7

Comfort

8.3

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
1,433 reviews
Korean Air
8.4
Very Good
1,216 reviews
Check prices

Entertainment

8.2

Boarding

8.5

Food

8.1

Crew

8.7

Comfort

8.3

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 Bangkok 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 Bangkok to Washington, D.C. Dulles Intl Airport?

    For as low as ฿36,697, Qatar Airways can have you in Washington, D.C. Dulles Intl Airport from Bangkok in 23h 40m. The distance between Bangkok and Washington, D.C. Dulles Intl Airport is about 14149 km. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Bangkok to Washington, D.C. Dulles Intl Airport round-trip?

    According to our current data, United Airlines (฿31,506), เอทิฮัดแอร์เวย์ (฿32,510), and Korean Air (฿32,957) offers the cheapest pricing from Bangkok to Washington, D.C. Dulles Intl Airport. United Airlines is currently priced 16% below the average price you’ll pay for this route.

  • Can I find deals for flights from Bangkok to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Bangkok to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Bangkok to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Bangkok to Dulles Intl.

  • Can I find deals for business class flights from Bangkok to Dulles Intl?

    Yes. Cheapflights offers flight deals from Bangkok 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 Bangkok to Washington, D.C. Dulles Intl Airport?

    Currently, April is the cheapest month in which you can book a flight from Bangkok to Washington, D.C. Dulles Intl Airport (average of ฿15,383). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of ฿36,795). 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 Bangkok 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 Reagan-National flights
Chiang Mai to Baltimore flights

Top 4 airlines flying from Bangkok to Dulles Intl

Discover the top 4 airlines that operate flights from Bangkok 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 5 May 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest฿31,506Average฿33,108FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
เอทิฮัดแอร์เวย์Cheapest฿32,510Average฿32,902FlexibilityNo cancel feeOn-time75%
Search เอทิฮัดแอร์เวย์ flights
Korean AirCheapest฿32,957Average฿35,543FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
ANACheapest฿34,530Average฿39,594FlexibilityNo cancel feeOn-time80%
Search ANA 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 Bangkok to Dulles Intl?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Bangkok to Dulles Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Bangkok to Dulles Intl?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Bangkok to Dulles Intl.

Can Cheapflights find flights from Bangkok to Dulles Intl with no change fees?

Need flexible booking options for your flight to Dulles Intl from Bangkok? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Bangkok to Dulles Intl become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Dulles Intl from Bangkok today and book when prices fit your budget.

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.