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฿19,861+ 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 16/6. Fares are subject to change and may not be available on all flights or dates of travel.
— IAD
25 Jun — 2 Jul1
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 26 May 2026.

Mon 15/607:00
BKK
-
IAD
2 stops35h 22m
United Airlines
Fri 7/822:20
IAD
-
BKK
2 stops48h 15m
United Airlines
Deal found 25/5฿31,350
Tue 23/609:35
BKK
-
IAD
2 stops48h 44m
United Airlines
Fri 24/722:20
IAD
-
BKK
2 stops48h 15m
United Airlines
Deal found 23/5฿31,642
Mon 7/909:35
BKK
-
IAD
2 stops46h 53m
United Airlines
Sun 20/915:15
IAD
-
BKK
2 stops31h 20m
United Airlines
Deal found 25/5฿31,707
Sun 1/1109:10
BKK
-
IAD
2 stops25h 50m
United Airlines
Wed 4/1108:35
IAD
-
BKK
2 stops27h 45m
United Airlines
Deal found 21/5฿31,739
Mon 28/907:00
BKK
-
IAD
2 stops26h 59m
United Airlines
Wed 30/912:35
IAD
-
BKK
1 stop29h 00m
United Airlines
Deal found 25/5฿31,966
Wed 9/915:45
BKK
-
IAD
3 stops30h 41m
United Airlines
Wed 30/913:03
IAD
-
BKK
2 stops33h 32m
United Airlines
Deal found 24/5฿31,999
Wed 16/1209:10
BKK
-
IAD
2 stops43h 04m
United Airlines
Mon 4/111:10
IAD
-
BKK
2 stops60h 15m
United Airlines
Deal found 23/5฿32,193
Mon 15/607:00
BKK
-
IAD
2 stops27h 19m
ANA
Fri 7/822:20
IAD
-
BKK
1 stop48h 15m
ANA
Deal found 25/5฿32,550
Sun 14/607:00
BKK
-
IAD
2 stops27h 19m
ANA
Fri 7/822:20
IAD
-
BKK
1 stop48h 15m
ANA
Deal found 25/5฿33,556
Tue 9/607:00
BKK
-
IAD
2 stops25h 00m
ANA
Tue 7/722:21
IAD
-
BKK
2 stops48h 14m
ANA
Deal found 23/5฿33,784
Tue 3/1122:55
DMK
-
IAD
1 stop45h 15m
Emirates
Sat 7/1110:30
IAD
-
DMK
1 stop35h 30m
Emirates
Deal found 22/5฿48,160
Tue 20/1023:50
DMK
-
IAD
1 stop43h 50m
Emirates
Sun 25/1011:15
IAD
-
DMK
1 stop22h 00m
Emirates
Deal found 23/5฿48,322

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 26 May 2026.

Return from

฿31,350

One-way from

฿19,861

Popular in

April

Cheapest in

October

Average price

฿41,442
United Airlines
  • United Airlines
  • 15/6-7/8
  • 4 total stops
  • 83h 37m total
  • Bangkok to Washington, D.C.
Search Deals
AIR PREMIA
  • AIR PREMIA
  • 16/6
  • 1 total stop
  • 23h 05m total
  • Bangkok to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (฿8,148 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (฿2,104 potential savings vs. average return price).
Search Deals
Average for return flights in May 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 26 May 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

Mon 28/9

07:00-22:59

2 stops26h 59m

Washington, D.C. Dulles Intl

Wed 30/9

12:35-04:35

1 stop29h 00m

฿31,966

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 25/10

14:05-05:40

2 stops26h 35m

Washington, D.C. Dulles Intl

Thu 12/11

17:14-09:50

2 stops28h 36m

฿36,964

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 22/7

09:35-14:12

2 stops39h 37m

Washington, D.C. Dulles Intl

Wed 19/8

12:50-04:35

1 stop28h 45m

฿37,094

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 3/7

01:50-15:40

1 stop24h 50m

Washington, D.C. Dulles Intl

Sat 25/7

15:10-18:10

1 stop40h 00m

฿37,645

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 18/6

09:35-15:50

1 stop41h 15m

Washington, D.C. Dulles Intl

Wed 5/8

15:15-09:35

2 stops31h 20m

฿38,911
Fastest return journey

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 6/7

02:30-15:40

1 stop24h 10m

Washington, D.C. Dulles Intl

Tue 14/7

11:05-19:25

1 stop21h 20m

฿38,944

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 25/10

09:50-10:50

1 stop36h 00m

Washington, D.C. Dulles Intl

Thu 12/11

11:50-13:25

1 stop37h 35m

฿39,203

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 17/6

01:50-15:40

1 stop24h 50m

Washington, D.C. Dulles Intl

Fri 7/8

18:50-13:45

1 stop31h 55m

฿39,917

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 13/6

15:45-06:58

2 stops26h 13m

Washington, D.C. Dulles Intl

Sat 8/8

17:42-09:35

3 stops28h 53m

฿39,982

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 22/7

12:50-16:45

1 stop38h 55m

Washington, D.C. Dulles Intl

Wed 19/8

17:40-09:50

1 stop29h 10m

฿40,988

Flights are sorted by cheapest return flights first.

Deals found on 22/5

Showing 1-10 of 43 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

How long is the flight to Dulles Intl?

On average, a flight from Bangkok to Dulles Intl takes 26 hours 22 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 ฿31,372
Korean Air
Korean Air
From ฿32,817
ANA
ANA
From ฿34,285
เอทิฮัดแอร์เวย์
เอทิฮัดแอร์เวย์
From ฿32,372

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).

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

To ensure you get the cheapest price possible for a flight to Dulles Intl, you should look to book at least 17 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.

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 26 May 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
1,217 reviews
Check prices

Boarding

8.5

Crew

8.7

Food

8.1

Overall

8.4

Entertainment

8.2

Comfort

8.3

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
1,217 reviews
Korean Air
8.4
Very Good
1,217 reviews
Check prices

Boarding

8.5

Crew

8.7

Food

8.1

Overall

8.4

Entertainment

8.2

Comfort

8.3

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
8.3
Very Good
1,215 reviews
Korean Air
8.4
Very Good
1,217 reviews
Check prices

Boarding

8.5

Crew

8.7

Food

8.1

Overall

8.4

Entertainment

8.2

Comfort

8.3

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
3,726 reviews
Korean Air
8.4
Very Good
1,217 reviews
Check prices

Boarding

8.5

Crew

8.7

Food

8.1

Overall

8.4

Entertainment

8.2

Comfort

8.3

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
9,753 reviews
Korean Air
8.4
Very Good
1,217 reviews
Check prices

Boarding

8.5

Crew

8.7

Food

8.1

Overall

8.4

Entertainment

8.2

Comfort

8.3

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
1,445 reviews
Korean Air
8.4
Very Good
1,217 reviews
Check prices

Boarding

8.5

Crew

8.7

Food

8.1

Overall

8.4

Entertainment

8.2

Comfort

8.3

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 50 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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