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฿19,697+ 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 25/5. Fares are subject to change and may not be available on all flights or dates of travel.
— IAD
5 May — 12 May1
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 April 2026.

Mon 15/609:35
BKK
-
IAD
2 stops61h 20m
United Airlines
Mon 20/722:20
IAD
-
BKK
2 stops48h 15m
United Airlines
Deal found 31/3฿25,883
Tue 16/607:00
BKK
-
IAD
2 stops59h 26m
United Airlines
Mon 20/722:20
IAD
-
BKK
2 stops48h 15m
United Airlines
Deal found 31/3฿26,176
Mon 5/1009:35
BKK
-
IAD
2 stops31h 28m
United Airlines
Mon 9/1106:00
IAD
-
BKK
2 stops30h 20m
United Airlines
Deal found 31/3฿26,371
Wed 24/609:35
BKK
-
IAD
2 stops48h 44m
United Airlines
Wed 9/907:00
IAD
-
BKK
2 stops39h 35m
United Airlines
Deal found 3/4฿26,404
Wed 1/707:00
BKK
-
IAD
2 stops25h 00m
United Airlines
Wed 9/912:35
IAD
-
BKK
1 stop29h 00m
United Airlines
Deal found 3/4฿26,501
Sun 21/607:00
BKK
-
IAD
2 stops25h 00m
United Airlines
Thu 23/712:50
IAD
-
BKK
1 stop28h 45m
United Airlines
Deal found 4/4฿26,534
Thu 17/909:35
BKK
-
IAD
2 stops31h 25m
United Airlines
Thu 15/1006:00
IAD
-
BKK
2 stops30h 55m
United Airlines
Deal found 2/4฿26,567
Tue 6/1009:35
BKK
-
IAD
2 stops45h 58m
United Airlines
Tue 3/1112:20
IAD
-
BKK
2 stops35h 05m
United Airlines
Deal found 31/3฿26,827
Wed 10/607:05
BKK
-
IAD
1 stop34h 17m
แอร์แคนาดา
Mon 10/816:20
IAD
-
BKK
2 stops25h 45m
แอร์แคนาดา
Deal found 3/4฿32,166
Sat 23/507:00
BKK
-
IAD
2 stops25h 09m
United Airlines
Fri 25/917:30
IAD
-
BKK
2 stops29h 05m
United Airlines
Deal found 31/3฿32,752
Fri 15/516:50
DMK
-
IAD
3 stops38h 39m
Multiple Airlines
Fri 29/515:10
IAD
-
DMK
2 stops25h 30m
Multiple Airlines
Deal found 2/4฿40,859
Wed 1/720:15
DMK
-
IAD
2 stops30h 25m
Multiple Airlines
Wed 22/715:10
IAD
-
DMK
2 stops26h 30m
Multiple Airlines
Deal found 31/3฿44,278

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 April 2026.

Return from

฿25,883

One-way from

฿19,697

Popular in

April

Cheapest in

October

Average price

฿60,296
United Airlines
  • United Airlines
  • 15/6-20/7
  • 4 total stops
  • 109h 35m total
  • Bangkok to Washington, D.C.
Search Deals
แอร์แคนาดา
  • แอร์แคนาดา
  • 25/5
  • 2 total stops
  • 49h 08m total
  • Bangkok to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (฿7,917 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (฿2,076 potential savings vs. average return price).
Search Deals
Average for return flights in April 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 April 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

Thu 17/9

09:35-06:00

2 stops31h 25m

Washington, D.C. Dulles Intl

Thu 15/10

06:00-23:55

2 stops30h 55m

฿26,567

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 6/5

19:00-16:05

1 stop32h 05m

Washington, D.C. Dulles Intl

Wed 13/5

11:00-19:50

1 stop21h 50m

฿33,957

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 3/5

02:30-16:05

1 stop24h 35m

Washington, D.C. Dulles Intl

Mon 11/5

20:20-14:15

1 stop30h 55m

฿34,120

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 1/10

09:35-10:05

1 stop35h 30m

Washington, D.C. Dulles Intl

Mon 5/10

15:30-04:35

2 stops26h 05m

฿35,943

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 12/6

19:45-18:10

1 stop33h 25m

Washington, D.C. Dulles Intl

Tue 11/8

21:00-06:20

1 stop22h 20m

฿36,464

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 15/6

07:00-10:05

1 stop38h 05m

Washington, D.C. Dulles Intl

Mon 20/7

22:15-04:35

2 stops43h 20m

฿37,766

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 8/6

07:00-00:45

2 stops28h 45m

Washington, D.C. Dulles Intl

Wed 12/8

15:02-09:35

3 stops31h 33m

฿40,306

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

Wed 1/7

20:15-15:40

2 stops30h 25m

Washington, D.C. Dulles Intl

Wed 22/7

15:10-04:40

2 stops26h 30m

฿44,278
Fastest return journey

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 25/5

01:45-16:05

1 stop25h 20m

Washington, D.C. Dulles Intl

Wed 1/7

21:00-07:15

1 stop23h 15m

฿44,896

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

Mon 22/6

10:05-08:45

2 stops33h 40m

Washington, D.C. Dulles Intl

Thu 23/7

15:10-04:40

2 stops26h 30m

฿45,026

Flights are sorted by cheapest return flights first.

Deals found on 1/4

Showing 1-10 of 40 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 3 April 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 28 hours 15 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, ANA and Korean Air.

United Airlines
United Airlines
From ฿31,592
ANA
ANA
From ฿34,494
Korean Air
Korean Air
From ฿32,923
เอทิฮัดแอร์เวย์
เอทิฮัดแอร์เวย์
From ฿32,476

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 April 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
1,203 reviews
Check prices

Crew

8.7

Comfort

8.3

Food

8.1

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
1,203 reviews
Korean Air
8.4
Very Good
1,203 reviews
Check prices

Crew

8.7

Comfort

8.3

Food

8.1

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
1,163 reviews
Korean Air
8.4
Very Good
1,203 reviews
Check prices

Crew

8.7

Comfort

8.3

Food

8.1

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
3,730 reviews
Korean Air
8.4
Very Good
1,203 reviews
Check prices

Crew

8.7

Comfort

8.3

Food

8.1

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
9,542 reviews
Korean Air
8.4
Very Good
1,203 reviews
Check prices

Crew

8.7

Comfort

8.3

Food

8.1

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
1,428 reviews
Korean Air
8.4
Very Good
1,203 reviews
Check prices

Crew

8.7

Comfort

8.3

Food

8.1

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 (25 hours 0 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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