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Dulles Intl

$599+ Cheap flights from Thailand to Dulles Intl (IAD)

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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
5월 1 — 5월 81
금 5/1
금 5/8
1 adult, Economy
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Cheap flight deals from Thailand to Dulles Intl

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 4월 1, 2026.

This United Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
월 6/159:35 am
BKK
-
IAD
2 stops61h 20m
United Airlines
월 7/2010:20 pm
IAD
-
BKK
2 stops48h 15m
United Airlines
Deal found 3/31$795
This United Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
화 6/167:00 am
BKK
-
IAD
2 stops59h 26m
United Airlines
월 7/2010:20 pm
IAD
-
BKK
2 stops48h 15m
United Airlines
Deal found 3/31$804
This United Airlines deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
목 8/277:00 am
BKK
-
IAD
2 stops26h 43m
United Airlines
목 9/108:29 am
IAD
-
BKK
2 stops28h 26m
United Airlines
Deal found 3/29$809
This United Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
월 10/59:35 am
BKK
-
IAD
2 stops31h 28m
United Airlines
월 11/96:00 am
IAD
-
BKK
2 stops30h 20m
United Airlines
Deal found 3/31$810
This United Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
화 10/69:35 am
BKK
-
IAD
2 stops45h 58m
United Airlines
화 11/312:20 pm
IAD
-
BKK
2 stops35h 05m
United Airlines
Deal found 3/31$824
This CheapOair deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
목 4/231:30 am
BKK
-
IAD
1 stop29h 00m
Multiple Airlines
월 5/43:10 pm
IAD
-
BKK
1 stop21h 40m
Multiple Airlines
Deal found 3/27$888
This AIR PREMIA deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AIR PREMIA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
화 4/2810:45 pm
BKK
-
IAD
1 stop23h 05m
AIR PREMIA
금 8/71:20 pm
IAD
-
BKK
1 stop44h 50m
AIR PREMIA
Deal found 3/30$906
This AIR PREMIA deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AIR PREMIA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
화 5/1210:45 pm
BKK
-
IAD
1 stop23h 05m
AIR PREMIA
수 6/31:20 pm
IAD
-
BKK
1 stop44h 50m
AIR PREMIA
Deal found 3/27$907
This United Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
수 6/179:35 am
BKK
-
IAD
2 stops32h 51m
United Airlines
목 7/168:21 pm
IAD
-
BKK
2 stops45h 14m
United Airlines
Deal found 3/27$999
This United Airlines deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
토 5/237:00 am
BKK
-
IAD
2 stops25h 09m
United Airlines
금 9/255:30 pm
IAD
-
BKK
2 stops29h 05m
United Airlines
Deal found 3/29$1,002
This Korean Air deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
화 11/1012:15 am
CNX
-
IAD
1 stop21h 35m
Korean Air
일 11/1511:50 am
IAD
-
CNX
1 stop23h 05m
Korean Air
Deal found 3/27$1,094
This FlightHub deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
수 8/1911:35 am
CNX
-
IAD
1 stop21h 55m
Multiple Airlines
목 9/245:54 pm
IAD
-
CNX
2 stops29h 31m
Multiple Airlines
Deal found 3/30$1,228

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 4월 1, 2026.

Round-trip from

$795
(United Airlines)

One-way from

$599
(Mytrip)

Popular in

August

Cheapest in

October

Average price

$1,184
From Thailand to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Thailand to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in April 2026
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Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated 4월 1, 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 round-trip

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

목 6/18

9:50 am-12:25 am

2 stops25h 35m

Washington, D.C. Dulles Intl

목 7/16

6:00 am-11:35 pm

2 stops30h 35m

$1,017

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

토 5/23

7:00 am-12:55 am

2 stops28h 55m

Washington, D.C. Dulles Intl

금 9/25

10:08 am-9:35 am

3 stops36h 27m

$1,031

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

수 5/6

9:05 am-8:40 am

1 stop34h 35m

Washington, D.C. Dulles Intl

수 5/13

11:00 am-8:45 pm

1 stop22h 45m

$1,100
Quickest round-trip

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

화 6/16

9:50 am-12:25 am

2 stops25h 35m

Washington, D.C. Dulles Intl

목 7/16

1:30 pm-1:05 am

1 stop24h 35m

$1,113

Chiang MaiWashington, D.C.

CNX - IAD

CNXIAD

Chiang Mai

수 8/19

8:00 pm-10:30 pm

2 stops61h 30m

Washington, D.C. Dulles Intl

토 9/19

5:38 pm-10:25 am

2 stops29h 47m

$1,245

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

수 5/6

9:50 am-2:13 pm

2 stops39h 23m

Washington, D.C. Dulles Intl

수 5/13

5:33 pm-9:45 pm

2 stops41h 12m

$1,274

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

수 7/1

9:35 am-11:52 am

2 stops61h 17m

Washington, D.C. Dulles Intl

수 7/22

2:53 pm-9:35 am

3 stops31h 42m

$1,314

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

수 4/15

2:15 pm-4:05 pm

2 stops36h 50m

Washington, D.C. Dulles Intl

금 4/17

11:00 am-8:45 pm

1 stop22h 45m

$1,356

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

수 7/1

8:15 pm-3:40 pm

2 stops30h 25m

Washington, D.C. Dulles Intl

수 7/22

3:10 pm-4:40 am

2 stops26h 30m

$1,360

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

화 7/21

4:45 pm-7:25 pm

2 stops37h 40m

Washington, D.C. Dulles Intl

수 9/2

1:20 pm-3:50 pm

1 stop39h 30m

$1,361

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 53 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 round-trip 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 $956). Flying from Thailand to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of $1,137). 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.

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

Find hourly flight availability from Thailand to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4월 1, 2026.

It’s optimal to fly from Thailand to Washington, D.C. Dulles Intl Airport in the evening. By choosing this option you can save up to 50% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Thailand to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Thailand to Dulles Intl. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their Thailand to Washington, D.C. Dulles Intl Airport flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 4월 1, 2026.
Read reviews from past customers who have flown Korean Air,ANA, andDelta from Thailand to Washington, D.C. Dulles Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,203 reviews

Boarding

8.5

Crew

8.7

Food

8.1

Overall

8.4

Comfort

8.3

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

Boarding

8.5

Crew

8.7

Food

8.1

Overall

8.4

Comfort

8.3

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
1,161 reviews
Korean Air
8.4
Very good
1,203 reviews

Boarding

8.5

Crew

8.7

Food

8.1

Overall

8.4

Comfort

8.3

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!!
Delta
7.9
Good
8,366 reviews
Korean Air
8.4
Very good
1,203 reviews

Boarding

8.5

Crew

8.7

Food

8.1

Overall

8.4

Comfort

8.3

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
3,732 reviews
Korean Air
8.4
Very good
1,203 reviews

Boarding

8.5

Crew

8.7

Food

8.1

Overall

8.4

Comfort

8.3

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
9,529 reviews
Korean Air
8.4
Very good
1,203 reviews

Boarding

8.5

Crew

8.7

Food

8.1

Overall

8.4

Comfort

8.3

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?

    Delta, United Airlines, and Qatar Airways can get you from Thailand to Washington, D.C. Dulles Intl Airport in just under 25h 35m. Your travel time can differ by up to 9h. Thailand and Washington, D.C. Dulles Intl Airport are separated by a distance of 8792 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Thailand to Washington, D.C. Dulles Intl Airport one-way?

    The cheapest airline one-way is IndiGo, with whom users have recently found tickets for as low as $471. However, be on the lookout for offers from Air China and SAUDIA, as they are both options that can get you from Thailand to Washington, D.C. Dulles Intl Airport for a low price.

  • What are the most popular routes from Thailand to Washington, D.C. Dulles Intl Airport?

    The most popular flight routes from Thailand to Washington, D.C. Dulles Intl Airport are Bangkok Suvarnabhumi - Washington, D.C. Dulles Intl, Chiang Mai - Washington, D.C. Dulles Intl and Bangkok Don Mueang Intl - Washington, D.C. Dulles Intl.

  • 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 vacation 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 $956). Flying from Thailand to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of $1,137). 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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Owings Mills
Arlington
Springfield
Silver Spring
Herndon
Hyattsville
Hanover
Laurel
Rockville
Upper Marlboro
Fredericksburg
Largo
Bowie
Clinton
Towson
Cordova
Manassas

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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 2,558,603 searches. Data last updated 4월 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,040Average$1,219FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$1,065Average$1,172FlexibilityNo cancel feeOn-time81%
ANACheapest$1,109Average$1,286FlexibilityNo cancel feeOn-time80%
DeltaCheapest$1,112Average$1,119FlexibilityNo cancel feeOn-timeN/A
Qatar AirwaysCheapest$1,142Average$1,177FlexibilityNo cancel feeOn-time68%

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