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฿20,048+ 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 1/4. Fares are subject to change and may not be available on all flights or dates of travel.
— IAD
21 Apr — 28 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 22 March 2026.

Fri 26/609:35
BKK
-
IAD
2 stops48h 44m
United Airlines
Fri 28/806:30
IAD
-
BKK
2 stops35h 05m
United Airlines
Deal found 21/3฿26,194
Tue 8/909:35
BKK
-
IAD
2 stops48h 24m
United Airlines
Tue 22/920:30
IAD
-
BKK
2 stops26h 05m
United Airlines
Deal found 19/3฿26,490
Wed 9/907:00
BKK
-
IAD
2 stops25h 09m
United Airlines
Tue 22/917:35
IAD
-
BKK
2 stops29h 00m
United Airlines
Deal found 19/3฿26,589
Tue 10/1107:10
BKK
-
IAD
2 stops29h 40m
United Airlines
Tue 1/1208:15
IAD
-
BKK
2 stops28h 05m
United Airlines
Deal found 17/3฿26,819
Tue 12/522:45
BKK
-
IAD
1 stop23h 05m
AIR PREMIA
Wed 3/613:20
IAD
-
BKK
1 stop44h 50m
AIR PREMIA
Deal found 22/3฿29,744
Thu 7/522:45
BKK
-
IAD
1 stop23h 05m
AIR PREMIA
Sun 10/513:20
IAD
-
BKK
1 stop44h 50m
AIR PREMIA
Deal found 18/3฿30,368
Tue 28/422:45
BKK
-
IAD
1 stop23h 05m
AIR PREMIA
Sun 19/713:20
IAD
-
BKK
1 stop44h 50m
AIR PREMIA
Deal found 20/3฿30,598
Wed 26/813:25
BKK
-
IAD
2 stops29h 03m
Philippine Airlines
Wed 9/917:38
IAD
-
BKK
2 stops31h 32m
Philippine Airlines
Deal found 19/3฿30,828
Fri 24/420:50
DMK
-
IAD
2 stops29h 55m
Multiple Airlines
Mon 4/515:10
IAD
-
DMK
2 stops26h 30m
Multiple Airlines
Deal found 21/3฿39,275
Wed 22/403:15
DMK
-
IAD
1 stop42h 35m
Multiple Airlines
Wed 6/518:10
IAD
-
DMK
2 stops41h 35m
Multiple Airlines
Deal found 21/3฿43,712
Mon 1/613:40
DMK
-
IAD
2 stops30h 00m
Multiple Airlines
Tue 30/611:05
IAD
-
DMK
2 stops24h 40m
Multiple Airlines
Deal found 21/3฿44,698
Fri 26/621:05
DMK
-
IAD
2 stops29h 35m
Multiple Airlines
Fri 28/815:10
IAD
-
DMK
2 stops26h 30m
Multiple Airlines
Deal found 21/3฿44,994

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 22 March 2026.

Return from

฿26,194

One-way from

฿20,048

Popular in

August

Cheapest in

October

Average price

฿45,980
United Airlines
  • United Airlines
  • 26/6-28/8
  • 4 total stops
  • 83h 49m total
  • Bangkok to Washington, D.C.
Search Deals
1/4
  • 1/4
  • 2 total stops
  • 36h 00m total
  • Bangkok to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (฿942 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (฿1,071 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 22 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

Cheapest return flight

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 26/6

09:35-23:19

2 stops48h 44m

Washington, D.C. Dulles Intl

Fri 28/8

06:30-04:35

2 stops35h 05m

฿26,194

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 14/6

02:35-23:55

2 stops32h 20m

Washington, D.C. Dulles Intl

Tue 14/7

06:00-23:35

2 stops30h 35m

฿33,753

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 9/9

09:50-11:05

1 stop36h 15m

Washington, D.C. Dulles Intl

Wed 23/9

13:15-01:05

1 stop24h 50m

฿36,185

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 3/7

09:15-15:40

1 stop41h 25m

Washington, D.C. Dulles Intl

Sat 25/7

21:00-19:05

1 stop35h 05m

฿39,045

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

Fri 24/4

20:50-15:45

2 stops29h 55m

Washington, D.C. Dulles Intl

Mon 4/5

15:10-04:40

2 stops26h 30m

฿39,275

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 26/8

09:50-23:51

2 stops25h 01m

Washington, D.C. Dulles Intl

Wed 9/9

10:05-13:35

2 stops40h 30m

฿39,406

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 3/8

09:35-07:22

2 stops32h 47m

Washington, D.C. Dulles Intl

Tue 3/11

08:15-00:20

2 stops28h 05m

฿41,280

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 6/5

09:50-11:42

2 stops36h 52m

Washington, D.C. Dulles Intl

Wed 13/5

07:00-23:35

2 stops29h 35m

฿41,707

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 20/4

15:45-16:22

3 stops35h 37m

Washington, D.C. Dulles Intl

Fri 1/5

22:20-09:35

2 stops48h 15m

฿42,101

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 16/4

15:45-23:34

3 stops42h 49m

Washington, D.C. Dulles Intl

Thu 23/4

22:05-09:35

2 stops48h 30m

฿42,529

Flights are sorted by cheapest return flights first.

Deals found on 21/3

Showing 1-10 of 44 resultsSorted by cheapest first
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5

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 13 March 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 52 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 ฿31,892
ANA
ANA
From ฿34,822
Korean Air
Korean Air
From ฿33,138
เอทิฮัดแอร์เวย์
เอทิฮัดแอร์เวย์
From ฿32,784

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 22 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
1,205 reviews
Check prices

Crew

8.7

Boarding

8.5

Comfort

8.3

Food

8.1

Entertainment

8.2

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
1,205 reviews
Korean Air
8.4
Very Good
1,205 reviews
Check prices

Crew

8.7

Boarding

8.5

Comfort

8.3

Food

8.1

Entertainment

8.2

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
8.4
Very Good
1,136 reviews
Korean Air
8.4
Very Good
1,205 reviews
Check prices

Crew

8.7

Boarding

8.5

Comfort

8.3

Food

8.1

Entertainment

8.2

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!!
Qatar Airways
7.4
Good
3,733 reviews
Korean Air
8.4
Very Good
1,205 reviews
Check prices

Crew

8.7

Boarding

8.5

Comfort

8.3

Food

8.1

Entertainment

8.2

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
9,458 reviews
Korean Air
8.4
Very Good
1,205 reviews
Check prices

Crew

8.7

Boarding

8.5

Comfort

8.3

Food

8.1

Entertainment

8.2

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
1,430 reviews
Korean Air
8.4
Very Good
1,205 reviews
Check prices

Crew

8.7

Boarding

8.5

Comfort

8.3

Food

8.1

Entertainment

8.2

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!!

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, Chiang Mai offers the quickest one-way flight (21 hours 25 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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