How long is the flight from Bangkok to Washington, D.C. Dulles Intl Airport?

For as low as ฿48,692, United Airlines can have you in Washington, D.C. Dulles Intl Airport from Bangkok in 31h 40m. The distance between Bangkok and Washington, D.C. Dulles Intl Airport is about 14124 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 (฿26,826), เอทิฮัดแอร์เวย์ (฿33,064), and Korean Air (฿33,421) offers the cheapest pricing from Bangkok to Washington, D.C. Dulles Intl Airport. United Airlines is currently priced 31% below the average price you’ll pay for this route.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

What are the most popular airlines that fly from Bangkok to Washington, D.C. Dulles Intl Airport?

When booking a flight from Bangkok to Washington, D.C. Dulles Intl Airport, you may want to consider flying on United Airlines, เอทิฮัดแอร์เวย์ or Korean Air as they are the most popular for this route.

What is the cheapest time of day to fly from BKK to IAD?

When flying from Bangkok to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

฿20,352+ Cheap Flights from Bangkok to Washington, D.C. Dulles Intl Airport

Cheap flight deals from Bangkok to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 1 September 2026.

Fri 4/908:15 -

1 stop24h 45m

Wed 16/901:15 -

1 stop28h 35m

Deal found 31/8฿25,092

Sat 19/1212:40 -

1 stop20h 15m

Fri 15/123:55 -

1 stop22h 55m

Deal found 29/8฿26,252

Sun 25/1015:20 -

1 stop35h 25m

Sun 29/1117:50 -

1 stop31h 50m

Deal found 30/8฿26,352

Mon 31/812:40 -

1 stop20h 50m

Sat 12/901:15 -

1 stop22h 25m

Deal found 30/8฿26,617

Mon 14/912:40 -

1 stop20h 20m

Sat 10/1001:15 -

1 stop22h 25m

Deal found 31/8฿26,948

Tue 22/915:25 -

1 stop35h 20m

Sat 7/1117:50 -

1 stop31h 50m

Deal found 30/8฿26,981

Wed 30/912:40 -

1 stop20h 20m

Sat 31/1000:55 -

1 stop22h 55m

Deal found 29/8฿27,180

Wed 30/912:40 -

1 stop20h 20m

Mon 2/1123:55 -

1 stop28h 55m

Deal found 29/8฿27,213

Fri 25/1212:40 -

1 stop20h 15m

Sat 9/123:55 -

1 stop33h 50m

Deal found 28/8฿27,246

Sun 20/920:25 -

2 stops48h 20m

Sun 8/1123:35 -

1 stop27h 55m

Deal found 28/8฿44,615

Tue 20/1015:30 -

2 stops29h 15m

Sun 25/1011:30 -

2 stops24h 50m

Deal found 29/8฿45,477

Tue 20/1012:10 -

1 stop31h 30m

Sun 25/1011:15 -

1 stop21h 55m

Deal found 29/8฿48,692

Best flights from Bangkok to Dulles Intl
Discover carefully curated flight deals from Bangkok to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 September 2026.

Sun 20/909:35 -

1 stop35h 30m

Thu 24/908:20 -

2 stops33h 15m

Deal found 28/8฿34,008

Thu 24/1221:30 -

1 stop24h 20m

Sat 2/106:00 -

2 stops29h 20m

Deal found 30/8฿41,433

Mon 28/912:10 -

1 stop31h 40m

Mon 5/1010:55 -

1 stop22h 50m

Deal found 31/8฿48,692

Tue 5/120:10 -

2 stops31h 45m

Wed 20/120:05 -

1 stop22h 35m

Deal found 31/8฿54,659

Mon 4/100:55 -

2 stops32h 17m

Sun 17/111:50 -

1 stop37h 35m

Deal found 31/8฿54,725

Sat 19/1223:00 -

1 stop45h 10m

Fri 15/110:30 -

1 stop21h 40m

Deal found 28/8฿56,482

Sun 4/1009:35 -

2 stops32h 26m

Mon 26/1015:37 -

3 stops32h 53m

Deal found 31/8฿34,075

Sun 20/909:35 -

1 stop35h 30m

Sun 8/1110:15 -

2 stops30h 55m

Deal found 28/8฿34,207

Mon 12/1015:45 -

3 stops35h 16m

Mon 19/1017:45 -

2 stops28h 50m

Deal found 28/8฿34,704

Fri 25/1216:55 -

3 stops29h 07m

Sat 9/117:55 -

2 stops42h 25m

Deal found 28/8฿34,804

Wed 30/923:50 -

1 stop43h 50m

Mon 2/1110:30 -

1 stop21h 40m

Deal found 29/8฿48,891

Tue 20/1012:10 -

1 stop31h 30m

Sun 29/1110:30 -

1 stop33h 25m

Deal found 31/8฿51,013

Thu 26/1111:10 -

1 stop33h 00m

Sun 20/1210:30 -

1 stop21h 40m

Deal found 30/8฿57,012

Thu 26/1111:10 -

1 stop33h 00m

Tue 15/1210:30 -

1 stop35h 35m

Deal found 30/8฿57,012

Fri 25/1223:00 -

1 stop45h 10m

Sat 9/110:30 -

1 stop35h 35m

Deal found 28/8฿53,167

Mon 21/912:10 -

1 stop31h 40m

Sat 24/1016:02 -

2 stops41h 08m

Deal found 27/8฿55,984

Thu 26/1116:55 -

3 stops41h 30m

Sun 20/1222:45 -

2 stops42h 25m

Deal found 30/8฿51,443

Sat 26/912:10 -

1 stop31h 40m

Sat 3/1016:02 -

2 stops32h 08m

Deal found 29/8฿56,349

Wed 6/109:10 -

2 stops24h 02m

Thu 21/107:00 -

2 stops40h 30m

Deal found 31/8฿55,554

Thu 26/1123:00 -

1 stop45h 10m

Fri 18/1210:30 -

1 stop33h 25m

Deal found 30/8฿57,675

Thu 26/1109:30 -

1 stop34h 40m

Fri 18/1210:30 -

2 stops42h 05m

Deal found 30/8฿59,465

Sun 3/109:30 -

1 stop34h 40m

Wed 20/110:30 -

1 stop20h 10m

Deal found 31/8฿60,559

Sun 3/108:55 -

1 stop35h 15m

Wed 20/110:30 -

1 stop33h 25m

Deal found 31/8฿63,343

Thu 7/108:55 -

1 stop35h 15m

Wed 20/110:30 -

1 stop33h 25m

Deal found 31/8฿63,343

Find flight deals from Bangkok to Dulles Intl

Round-trip from	฿26,252
One-way from	฿20,352
Popular in	August
Cheapest in	July
Average price	฿37,654

Thai Airways
19/12-15/1
2 total stops
43h 10m total
Bangkok to Washington, D.C.

Search Deals

AIR PREMIA
8/11
1 total stop
33h 40m total
Bangkok to Washington, D.C.

Search Deals

High demand for flights, 0% potential price rise

Search Deals

Cheapest flight prices on average. 1% potential price decrease (฿17,779 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Cheapflights Fare Finder

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 Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Sun 20/9

09:35-10:05

1 stop35h 30m

Washington, D.C. Dulles Intl

Thu 24/9

08:20-04:35

2 stops33h 15m

฿34,008

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Sun 4/10

09:35-07:01

2 stops32h 26m

Washington, D.C. Dulles Intl

Mon 26/10

15:37-11:30

3 stops32h 53m

฿34,075

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Sun 20/9

09:35-10:05

1 stop35h 30m

Washington, D.C. Dulles Intl

Sun 8/11

10:15-05:10

2 stops30h 55m

฿34,207

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Mon 12/10

15:45-16:01

3 stops35h 16m

Washington, D.C. Dulles Intl

Mon 19/10

17:45-09:35

2 stops28h 50m

฿34,704

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Fri 25/12

16:55-10:02

3 stops29h 07m

Washington, D.C. Dulles Intl

Sat 9/1

17:55-00:20

2 stops42h 25m

฿34,804

Fastest return journey

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Thu 24/12

21:30-09:50

1 stop24h 20m

Washington, D.C. Dulles Intl

Sat 2/1

06:00-23:20

2 stops29h 20m

฿41,433

BangkokWashington, D.C.

DMK Bangkok Don Mueang Intl - IAD Washington, D.C. Dulles Intl

DMKIAD

Bangkok Don Mueang Intl

Mon 28/9

12:10-08:50

1 stop31h 40m

Washington, D.C. Dulles Intl

Mon 5/10

10:55-20:45

1 stop22h 50m

฿48,692

BangkokWashington, D.C.

DMK Bangkok Don Mueang Intl - IAD Washington, D.C. Dulles Intl

DMKIAD

Bangkok Don Mueang Intl

Wed 30/9

23:50-08:40

1 stop43h 50m

Washington, D.C. Dulles Intl

Mon 2/11

10:30-20:10

1 stop21h 40m

฿48,891

BangkokWashington, D.C.

DMK Bangkok Don Mueang Intl - IAD Washington, D.C. Dulles Intl

DMKIAD

Bangkok Don Mueang Intl

Tue 20/10

12:10-08:40

1 stop31h 30m

Washington, D.C. Dulles Intl

Sun 29/11

10:30-07:55

1 stop33h 25m

฿51,013

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Thu 26/11

16:55-22:25

3 stops41h 30m

Washington, D.C. Dulles Intl

Sun 20/12

22:45-05:10

2 stops42h 25m

฿51,443

Flights are sorted by cheapest return flights first.

Deals found on 30/8

Showing 1-10 of 46 resultsSorted by cheapest first

...

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.

TH1-IAD

BKK-IAD

DMK-IAD

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

TH1-IAD

BKK-IAD

DMK-IAD

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

Currently, July is the cheapest month in which you can book a flight from Bangkok to Washington, D.C. Dulles Intl Airport (average of ฿34,936). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of ฿45,278). 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?

Airfare is below average for this route at the moment.

Bangkok to Washington, D.C. Dulles Intl Airport flights typically cost between ฿35,135 and ฿42,162 in December.
The cheapest return price found within the last 5 days was ฿26,252 on Thai Airways (19 Dec–15 Jan).

Reviews of airlines servicing Dulles Intl

Check out reviews from past customers who have flown with Korean Air,United Airlines, andเอทิฮัดแอร์เวย์ 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

1,221 reviews

Check prices

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

1,221 reviews

Korean Air

8.4

Very Good

1,221 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Jacqueline,Aug 2025

ICN - SEA

United Airlines

7.4

Good

10,154 reviews

Korean Air

8.4

Very Good

1,221 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Jacqueline,Aug 2025

ICN - SEA

เอทิฮัดแอร์เวย์

7.3

Good

1,529 reviews

Korean Air

8.4

Very Good

1,221 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Jacqueline,Aug 2025

ICN - SEA

Related info for your journey

How long is the flight from Bangkok to Washington, D.C. Dulles Intl Airport?
For as low as ฿48,692, United Airlines can have you in Washington, D.C. Dulles Intl Airport from Bangkok in 31h 40m. The distance between Bangkok and Washington, D.C. Dulles Intl Airport is about 14124 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 (฿26,826), เอทิฮัดแอร์เวย์ (฿33,064), and Korean Air (฿33,421) offers the cheapest pricing from Bangkok to Washington, D.C. Dulles Intl Airport. United Airlines is currently priced 31% 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, July is the cheapest month in which you can book a flight from Bangkok to Washington, D.C. Dulles Intl Airport (average of ฿34,936). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of ฿45,278). 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 Bangkok to Dulles Intl

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Top 3 airlines flying from Bangkok to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest฿26,826	Average฿34,702	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
เอทิฮัดแอร์เวย์	Cheapest฿33,064	Average฿33,463	FlexibilityNo cancel fee	On-time75%	Search เอทิฮัดแอร์เวย์ flights
Korean Air	Cheapest฿33,421	Average฿37,313	FlexibilityNo cancel fee	On-time81%	Search Korean Air flights

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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.

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Cheap flights from Bangkok to Washington, D.C. Dulles Intl Airport from ฿20,352

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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Bangkok to Dulles Intl

Cheapest flights from Bangkok to Dulles IntlExplore 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 1 September 2026.

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 1 September 2026.

Best flights from Bangkok to Dulles IntlDiscover carefully curated flight deals from Bangkok to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 September 2026.

Discover carefully curated flight deals from Bangkok to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 September 2026.

Last-minute flights from Bangkok to Dulles IntlDiscover last-minute flight deals from Bangkok to Dulles Intl. Data last updated 1 September 2026 and is based on user searches.

Discover last-minute flight deals from Bangkok to Dulles Intl. Data last updated 1 September 2026 and is based on user searches.

One-way flights from Bangkok to Dulles IntlSearch for one-way flight options from Bangkok to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 1 September 2026.

Search for one-way flight options from Bangkok to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 1 September 2026.

Find flight deals from Bangkok to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

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Cheapflights Fare Finder

Use the filters below to find and compare flights from Bangkok to Washington, D.C. Dulles Intl Airport that are best for you.

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.

Cheapflights Insights

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

How much does it cost for a return flight from Bangkok to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment.

Bangkok to Washington, D.C. Dulles Intl Airport flights typically cost between ฿35,135 and ฿42,162 in December.The cheapest return price found within the last 5 days was ฿26,252 on Thai Airways (19 Dec–15 Jan).

Reviews of airlines servicing Dulles Intl

Related info for your journey

How long is the flight from Bangkok to Washington, D.C. Dulles Intl Airport?

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

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

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

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

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

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.

Complete your trip

Complete your trip to Dulles Intl by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Bangkok to Dulles Intl by cabin class

Find flights from Bangkok to Dulles Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Bangkok and Dulles Intl flights

Browse other Bangkok and Dulles Intl flight options. Last updated on 1 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Top 3 airlines flying from Bangkok to Dulles Intl

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How does Cheapflights help users find flights from Bangkok to Dulles Intl?

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

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

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

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Travel Smart

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 1 September 2026.

Best flights from Bangkok to Dulles Intl
Discover carefully curated flight deals from Bangkok to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 September 2026.

Last-minute flights from Bangkok to Dulles Intl
Discover last-minute flight deals from Bangkok to Dulles Intl. Data last updated 1 September 2026 and is based on user searches.

One-way flights from Bangkok to Dulles Intl
Search for one-way flight options from Bangkok to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 1 September 2026.

Bangkok to Washington, D.C. Dulles Intl Airport flights typically cost between ฿35,135 and ฿42,162 in December.
The cheapest return price found within the last 5 days was ฿26,252 on Thai Airways (19 Dec–15 Jan).