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฿18,529+ Cheap flights to Dulles Intl

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 18/3. Fares are subject to change and may not be available on all flights or dates of travel.
— IAD
4 Apr — 11 Apr1
1 adult
1 adult, Economy, 0 bags

Flights to Dulles Intl in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Dulles Intl Airport
Explore the most affordable flight options available to Dulles Intl Airport. Find the lowest fares based on data from user searches, with prices last updated on 5 March 2026.

Thu 16/401:30
BKK
-
IAD
1 stop29h 00m
Air China
Fri 24/423:00
IAD
-
BKK
1 stop38h 10m
Air China
Deal found 3/3฿23,832
Mon 9/319:30
BKK
-
IAD
1 stop35h 00m
Air China
Tue 7/423:00
IAD
-
BKK
1 stop38h 10m
Air China
Deal found 1/3฿24,084
Mon 25/501:30
BKK
-
IAD
1 stop29h 00m
Air China
Tue 26/523:00
IAD
-
BKK
1 stop32h 20m
Air China
Deal found 4/3฿24,747
Thu 27/809:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Thu 10/906:15
IAD
-
BKK
2 stops30h 40m
United Airlines
Deal found 4/3฿25,284
Wed 29/409:35
BKK
-
IAD
2 stops32h 52m
United Airlines
Mon 4/522:05
IAD
-
BKK
2 stops48h 30m
United Airlines
Deal found 4/3฿25,378
Mon 16/319:30
BKK
-
IAD
1 stop35h 00m
Air China
Fri 3/423:00
IAD
-
BKK
1 stop32h 20m
Air China
Deal found 2/3฿25,473
Sat 7/320:55
DMK
-
IAD
2 stops29h 50m
Multiple Airlines
Fri 24/413:20
IAD
-
DMK
1 stop39h 15m
Multiple Airlines
Deal found 28/2฿34,879
Mon 4/513:40
DMK
-
IAD
2 stops55h 05m
Multiple Airlines
Sun 12/713:20
IAD
-
DMK
1 stop39h 30m
Multiple Airlines
Deal found 1/3฿35,448
Wed 4/313:40
DMK
-
IAD
2 stops37h 05m
Multiple Airlines
Fri 24/413:20
IAD
-
DMK
1 stop39h 15m
Multiple Airlines
Deal found 28/2฿37,373
Tue 3/322:45
DMK
-
IAD
2 stops29h 10m
Multiple Airlines
Fri 24/413:20
IAD
-
DMK
1 stop39h 15m
Multiple Airlines
Deal found 28/2฿38,667
Thu 23/415:15
DMK
-
IAD
2 stops34h 15m
Multiple Airlines
Wed 6/520:20
IAD
-
DMK
2 stops24h 35m
Multiple Airlines
Deal found 28/2฿38,825
Mon 2/322:45
DMK
-
IAD
2 stops29h 10m
Multiple Airlines
Fri 24/413:20
IAD
-
DMK
1 stop39h 15m
Multiple Airlines
Deal found 28/2฿39,078

Find flight deals to Dulles Intl Airport

Find the latest flights to Dulles Intl in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 17,341 searches and data was last updated on 5 March 2026.

Return from

฿23,832

One-way from

฿18,529

Popular in

August

Cheapest in

October

Average price

฿43,339
Air China
  • Air China
  • 16/4-24/4
  • 2 total stops
  • 67h 10m total
  • Bangkok to Washington, D.C.
Search Deals
18/3
  • 18/3
  • 3 total stops
  • 39h 21m total
  • Bangkok to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (฿556 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (฿997 potential savings vs. average return price).
Search Deals
Average for return flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Locate flights to Dulles Intl that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 17,341 searches and data was last updated on 5 March 2026.
Use the filters below to find and compare flights to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Route

Depart

Return

Price

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 2/4

09:50-23:40

2 stops24h 50m

Washington, D.C. Dulles Intl

Sat 11/4

06:00-21:45

2 stops28h 45m

฿33,427

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 1/4

21:40-23:49

2 stops37h 09m

Washington, D.C. Dulles Intl

Mon 6/4

19:29-21:45

2 stops39h 16m

฿34,059

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 28/7

09:35-07:22

2 stops32h 47m

Washington, D.C. Dulles Intl

Tue 29/9

13:05-09:35

3 stops33h 30m

฿35,258

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 17/4

15:45-07:50

2 stops27h 05m

Washington, D.C. Dulles Intl

Sat 2/5

15:15-09:35

3 stops31h 20m

฿35,795

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 18/4

09:05-08:40

1 stop34h 35m

Washington, D.C. Dulles Intl

Sun 3/5

20:20-07:05

1 stop23h 45m

฿37,626

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

Thu 23/4

15:15-14:30

2 stops34h 15m

Washington, D.C. Dulles Intl

Wed 6/5

20:20-07:55

2 stops24h 35m

฿38,825

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 30/3

09:50-23:41

2 stops24h 51m

Washington, D.C. Dulles Intl

Mon 6/4

19:59-13:35

2 stops30h 36m

฿39,677

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 6/5

21:40-21:24

2 stops34h 44m

Washington, D.C. Dulles Intl

Wed 13/5

08:05-13:35

2 stops42h 30m

฿39,930

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 1/4

15:45-17:28

3 stops36h 43m

Washington, D.C. Dulles Intl

Mon 6/4

22:05-09:35

2 stops48h 30m

฿41,129

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 25/5

03:15-19:30

2 stops27h 15m

Washington, D.C. Dulles Intl

Tue 26/5

21:45-12:50

2 stops28h 05m

฿41,698

Flights are sorted by cheapest return flights first.

Deals found on 4/3

Showing 1-10 of 39 resultsSorted by cheapest first
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Best time to book a flight to Dulles Intl

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

When is the best time to book a flight to Dulles Intl?

Use this chart to determine the optimal time to book a return flight from Bangkok to Dulles Intl. Price data was last updated on 27 February 2026.

To ensure you get the cheapest price possible for a flight to Dulles Intl, you should look to book at least 81 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.

How long is the flight to Dulles Intl?

On average, a flight from Bangkok to Dulles Intl takes 26 hours 10 minutes. Flights to Dulles Intl from other popular cities in Thailand will vary in length. Below are a few examples of popular routes and their flight times.

What are the most popular airlines that fly to Dulles Intl?

The most popular airlines flying from Bangkok to Dulles Intl are United Airlines, Korean Air and ANA.

United Airlines
United Airlines
From ฿30,629
Korean Air
Korean Air
From ฿31,920
ANA
ANA
From ฿33,443
Qatar Airways
Qatar Airways
From ฿35,480

What are the cheapest airlines that fly to Dulles Intl?

The cheapest airlines flying from Bangkok to Dulles Intl are United Airlines, เอทิฮัดแอร์เวย์ and Korean Air.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

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

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Dulles Intl, 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).

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 March 2026.
Get a feel of what it's like to fly with Korean Air, ANA, andQatar Airways to the United States by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very Good
1,195 reviews
Check prices

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
1,195 reviews
Korean Air
8.4
Very Good
1,195 reviews
Check prices

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
1,108 reviews
Korean Air
8.4
Very Good
1,195 reviews
Check prices

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
3,746 reviews
Korean Air
8.4
Very Good
1,195 reviews
Check prices

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!!
United Airlines
7.4
Good
9,386 reviews
Korean Air
8.4
Very Good
1,195 reviews
Check prices

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!!
เอทิฮัดแอร์เวย์
7.3
Good
1,424 reviews
Korean Air
8.4
Very Good
1,195 reviews
Check prices

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!!

FAQs about flying to Dulles Intl

  • Can I find cheaper flights to Dulles Intl if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Dulles Intl on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Dulles Intl?

    Based on reviews from Cheapflights users, United Airlines is rated the highest out of the airlines that fly to Dulles Intl.

  • Where does the fastest flight to Dulles Intl depart from?

    For those looking to save time traveling to Dulles Intl, Bangkok offers the quickest one-way flight (24 hours 10 minutes).

  • Does Washington, D.C. Dulles Intl have rental cars?

    Yes. Those touching down at Washington, D.C. Dulles Intl can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Washington, D.C. Dulles Intl?

    Yes. Washington, D.C. Dulles Intl has hotels nearby for those requiring accommodations. Sleepbox Lounge Iad, Dulles International Airport is the closest property to Washington, D.C. Dulles Intl (0.0 km away from Washington, D.C. Dulles Intl).

See more FAQs

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