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$459+ Cheap flights from Dulles Intl (IAD) to Bangkok

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 11/28. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BKK
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Bangkok are usually found in October or September, booked 11 days in advance, depart on a Saturday or Tuesday and return on a Sunday

Cheap flight deals from Dulles Intl to Bangkok

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Bangkok (TH1). 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 October 30, 2025.

Round-trip from

$851
(oojo)

One-way from

$459
(IEagle)

Popular in

December

Cheapest in

October

Average price

$996
From Washington, D.C. Dulles Intl to Bangkok
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One-way flight from Washington, D.C. Dulles Intl to Bangkok
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Highest demand for flights based on searches. 7% potential increase in price ($98 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Dulles Intl to Bangkok

Cheapest flights from Dulles Intl to Bangkok
Explore the most affordable flight options available from Dulles Intl to Bangkok. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This CheapTickets.ch deal was found by Cheapflights users on 10/28. 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 CheapTickets.ch is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/278:05 pmIAD - BKK
1 stop35h 20mQatar Airways
Wed 12/32:00 amBKK - IAD
1 stop25h 55mQatar Airways
Deal found 10/28$849
This oojo deal was found by Cheapflights users on 10/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2810:40 amIAD - BKK
1 stop20h 45mQatar Airways
Wed 12/103:00 amBKK - IAD
1 stop24h 55mQatar Airways
Deal found 10/28$854
This Etihad Airways deal was found by Cheapflights users on 10/30. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/279:10 pmIAD - BKK
1 stop38h 10mEtihad Airways
Wed 12/108:50 pmBKK - IAD
1 stop30h 40mEtihad Airways
Deal found 10/30$855
This Etihad Airways deal was found by Cheapflights users on 10/29. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/309:10 pmIAD - BKK
1 stop38h 10mEtihad Airways
Sat 3/282:55 amBKK - IAD
1 stop41h 50mEtihad Airways
Deal found 10/29$856
This FlightHub deal was found by Cheapflights users on 10/28. 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.
Thu 11/278:05 pmIAD - BKK
1 stop34h 20mQatar Airways
Sun 12/148:30 pmBKK - IAD
1 stop31h 25mQatar Airways
Deal found 10/28$859
This oojo deal was found by Cheapflights users on 10/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/286:13 pmIAD - BKK
2 stops35h 17mSTARLUX Airlines
Mon 11/101:45 pmBKK - IAD
2 stops28h 38mSTARLUX Airlines
Deal found 10/28$863
This oojo deal was found by Cheapflights users on 10/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/36:13 pmIAD - BKK
2 stops34h 17mSTARLUX Airlines
Mon 11/171:45 pmBKK - IAD
2 stops28h 38mSTARLUX Airlines
Deal found 10/29$865
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/249:10 pmIAD - BKK
1 stop38h 10mEtihad Airways
Tue 12/239:25 amBKK - IAD
1 stop35h 40mEtihad Airways
Deal found 10/29$868
This EaseMyTrip deal was found by Cheapflights users on 10/28. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/169:15 pmIAD - BKK
2 stops35h 50mIndiGo
Wed 11/1910:50 amBKK - IAD
2 stops44h 30mIndiGo
Deal found 10/28$869
This oojo deal was found by Cheapflights users on 10/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/106:13 pmIAD - BKK
2 stops34h 17mMultiple Airlines
Mon 12/81:45 pmBKK - IAD
2 stops28h 21mMultiple Airlines
Deal found 10/30$870
This Trip.com deal was found by Cheapflights users on 10/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/299:10 pmIAD - DMK
2 stops37h 40mMultiple Airlines
Sun 12/71:40 pmDMK - IAD
2 stops37h 50mMultiple Airlines
Deal found 10/29$1,000
This Trip.com deal was found by Cheapflights users on 10/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/36:13 pmIAD - DMK
2 stops42h 02mMultiple Airlines
Sun 11/93:10 amDMK - IAD
2 stops39h 13mMultiple Airlines
Deal found 10/29$1,051

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Bangkok 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 October 30, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Bangkok that are best for you.

Fly from

Dulles Intl

Fly to

Bangkok

Route

Depart

Return

Price

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Mon 3/2

2:35 pm-6:00 pm

1 stop39h 25m

Bangkok Suvarnabhumi

Thu 3/26

2:55 am-10:05 am

1 stop42h 10m

$852

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Sun 2/8

2:35 pm-11:20 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Fri 2/20

7:35 pm-9:05 am

2 stops49h 30m

$852

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Thu 2/5

2:35 pm-11:20 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Sun 2/15

8:55 am-9:05 am

1 stop36h 10m

$852

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Mon 2/23

2:35 pm-7:10 am

1 stop28h 35m

Bangkok Suvarnabhumi

Sun 3/8

2:55 am-10:05 am

1 stop42h 10m

$852

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Mon 2/9

2:35 pm-11:20 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Mon 3/9

5:40 pm-10:05 am

2 stops51h 25m

$856

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Sun 1/11

2:35 pm-7:10 am

1 stop28h 35m

Bangkok Suvarnabhumi

Sun 4/26

9:10 am-9:45 am

1 stop35h 35m

$857

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Fri 3/27

3:35 pm-11:20 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Thu 4/2

8:55 pm-9:45 am

1 stop23h 50m

$916

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Mon 3/9

3:35 pm-11:20 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Mon 3/16

5:40 pm-10:05 am

2 stops51h 25m

$920

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Fri 3/6

2:35 pm-11:20 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Fri 3/13

5:40 pm-10:05 am

2 stops51h 25m

$920

Washington, D.C.Bangkok

IAD - BKK

IADBKK

Washington, D.C. Dulles Intl

Sat 1/10

2:35 pm-11:20 pm

1 stop20h 45m

Bangkok Suvarnabhumi

Sat 1/24

8:55 am-9:05 am

1 stop36h 10m

$921

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 39 results
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Best time to book a flight from Dulles Intl to Bangkok

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

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Bangkok. Price data was last updated on October 24, 2025.

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Bangkok may vary depending on when you book. For the best chance of a lower fare, look to book 11 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, May is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Bangkok (average of $629). Flying from Washington, D.C. Dulles Intl Airport to Bangkok in June is currently the most expensive (average of $1,097). 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 IAD to BKK?

Find hourly flight availability from Dulles Intl to Bangkok. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. Dulles Intl Airport to Bangkok in the afternoon. If you’re flexible enough to do this you can expect to save up to 28% on your trip compared to booking a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Bangkok. Price data was last updated on December 16, 2024.

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

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Bangkok?

Reviews of airlines servicing Bangkok

Get insights into the airlines that provide service to Bangkok. 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 Bangkok. Reviews last updated October 30, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Bangkok, such as Korean Air, ANA, and Qatar Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Food

8.1

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

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
1,155 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Food

8.1

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

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
998 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Food

8.1

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

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
3,661 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Food

8.1

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

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!!
Etihad Airways
7.4
Good
1,284 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Food

8.1

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

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!!
Turkish Airlines
7.3
Good
4,031 reviews
Korean Air
8.4
Very good
1,155 reviews

Crew

8.7

Food

8.1

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

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

    There are many flights that can get you from Washington, D.C. Dulles Intl Airport to Bangkok in 39h 25m. Fly via Etihad Airways to get the fastest option. The distance from Washington, D.C. Dulles Intl Airport to Bangkok is about 8792 mi.

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

    Air China, at $565, was found to be the cheapest airline from Washington, D.C. Dulles Intl Airport to Bangkok.Alternate airlines to your destination round-trip include Air India and Korean Air. Air China is priced at 53% lower than the current average price of a flight leaving 3 months from now.

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

    For one-way options, check prices for STARLUX Airlines. According to our data, you can fly for as low as $462. Users have also found prices from $475 and $509 on JetBlue and United Airlines, respectively.

  • Where are the most common layover locations when flying from Washington, D.C. Dulles Intl Airport to Bangkok?

    Most of the time, Washington, D.C. Dulles Intl Airport to Bangkok flights that have layovers will stop in Doha. Doha is followed by Istanbul in terms of the most popular layover location on flights from Washington, D.C. Dulles Intl Airport to Bangkok. Abu Dhabi ranks third in terms of the most popular layover location on Washington, D.C. Dulles Intl Airport to Bangkok flights.

  • What are some popular points of interest to see during a layover in Istanbul?

    The majority of Istanbul visitors spend their time at Taksim Square, Beyazit Meydani, and Laleli Camii. Taksim Square, Beyazit Meydani, and Laleli Camii can be visited by traveling about 20.8 mi, 21.7 mi, and 21.5 mi respectively from Istanbul. Travelers can rent a car at Istanbul for an average daily rate of $39 to make sightseeing during their layover a little easier.

  • What are points of interest worth seeing during a layover in Abu Dhabi?

    Most Abu Dhabi visitors opt to spend their time at Emirates Palace, Emirates Park Zoo, and Ferrari World Abu Dhabi. Emirates Palace, Emirates Park Zoo, and Ferrari World Abu Dhabi are located about 21.1 mi, 7.9 mi, and 4.5 mi, respectively from Abu Dhabi Zayed Intl. Those landing in Abu Dhabi looking to spend some time exploring during their layover can rent a car for about $27 per day.

  • Where are the least popular layover locations for Washington, D.C. Dulles Intl Airport to Bangkok flights?

    Flights departing from Washington, D.C. Dulles Intl Airport and landing in Bangkok layover in Jeddah least frequently. Jeddah is followed by Tokyo in terms of the least popular layover location on flights from Washington, D.C. Dulles Intl Airport to Bangkok. Seoul sees the third fewest flights with layovers for the Washington, D.C. Dulles Intl Airport to Bangkok route.

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

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

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

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

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

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

    Currently, May is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Bangkok (average of $629). Flying from Washington, D.C. Dulles Intl Airport to Bangkok in June is currently the most expensive (average of $1,097). 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

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Top 10 airlines flying from Dulles Intl to Bangkok

Discover the top 10 airlines that operate flights from Dulles Intl to Bangkok. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air ChinaCheapest$565Average$866FlexibilityNo cancel feeOn-time67%
Air IndiaCheapest$700Average$844FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$805Average$1,251FlexibilityNo cancel feeOn-time81%
Etihad AirwaysCheapest$827Average$1,080FlexibilityNo cancel feeOn-time75%
Qatar AirwaysCheapest$852Average$1,281FlexibilityNo cancel feeOn-time68%
ANACheapest$895Average$994FlexibilityNo cancel feeOn-time80%
Turkish AirlinesCheapest$897Average$1,180FlexibilityNo cancel feeOn-time77%
JetBlueCheapest$900Average$1,561FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$920Average$1,396FlexibilityNo cancel feeOn-time75%
DeltaCheapest$928Average$1,132FlexibilityNo cancel feeOn-timeN/A

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