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฿3,495+ Cheap flights from Washington, D.C. Dulles Intl Airport

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
IAD — BKK
14 Nov — 21 Nov1
1 adult
1 adult, Economy

What to know about flights from Dulles Intl

Discover essential information about flights departing from Dulles Intl, including flight schedules, destinations, airlines operating at the Dulles Intl airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 15 October 2025.

Good round-trip deal

฿8,630 or less

Good one-way deal

฿9,816 or less
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl.
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Find flights from Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Dulles Intl
Explore the most affordable flight options available from Dulles Intl. Find the lowest fares based on data from user searches, with prices last updated on 15 October 2025.

Wed 5/1117:37IAD - PDX
Nonstop5h 52mUnited Airlines
Sat 8/1108:20PDX - IAD
Nonstop4h 55mUnited Airlines
Deal found 12/10฿9,049
Sat 8/1117:37IAD - PDX
Nonstop5h 52mUnited Airlines
Tue 11/1107:00PDX - IAD
1 stop7h 30mUnited Airlines
Deal found 15/10฿9,375
Wed 12/1107:43IAD - PDX
1 stop7h 55mอลาสกาแอร์ไลน์
Sat 15/1120:30PDX - IAD
1 stop6h 53mอลาสกาแอร์ไลน์
Deal found 13/10฿9,669
Tue 11/1117:37IAD - PDX
Nonstop5h 52mUnited Airlines
Tue 18/1108:20PDX - IAD
Nonstop4h 55mUnited Airlines
Deal found 14/10฿9,735
Tue 11/1106:00IAD - PDX
1 stop9h 13mUnited Airlines
Sat 15/1108:20PDX - IAD
Nonstop4h 55mUnited Airlines
Deal found 13/10฿9,767
Wed 5/1107:35IAD - PDX
1 stop10h 03mเดลต้า
Sun 9/1105:30PDX - IAD
1 stop16h 24mเดลต้า
Deal found 12/10฿9,865
Wed 5/1106:00IAD - PDX
1 stop9h 13mUnited Airlines
Sun 9/1108:20PDX - IAD
Nonstop4h 55mUnited Airlines
Deal found 12/10฿9,898
Wed 12/1117:37IAD - PDX
Nonstop5h 52mUnited Airlines
Mon 17/1108:20PDX - IAD
Nonstop4h 55mUnited Airlines
Deal found 14/10฿9,931
Sat 8/1107:43IAD - PDX
1 stop7h 55mอลาสกาแอร์ไลน์
Sat 15/1115:50PDX - IAD
1 stop11h 33mอลาสกาแอร์ไลน์
Deal found 14/10฿9,996
Tue 7/421:00IAD - BKK
1 stop28h 55mQatar Airways
Tue 21/402:30BKK - IAD
1 stop24h 10mQatar Airways
Deal found 15/10฿27,505
Sun 1/221:10IAD - BKK
1 stop32h 50mเอทิฮัดแอร์เวย์
Mon 16/219:35BKK - IAD
2 stops55h 55mเอทิฮัดแอร์เวย์
Deal found 14/10฿27,571
Wed 3/1221:10IAD - BKK
1 stop38h 10mเอทิฮัดแอร์เวย์
Wed 17/1217:40BKK - IAD
2 stops57h 50mเอทิฮัดแอร์เวย์
Deal found 15/10฿27,603

Find flights from Dulles Intl within your budget

 
Find flights departing from Dulles Intl that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 15 October 2025. In the last 7 days, Cheapflights users made a total of 17,341 searches

Fly to

Suvarnabhumi

Route

Depart

Return

Price

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Sat 28/2

16:10-22:59

1 stop9h 49m

Portland

Sat 7/3

23:10-07:58

Nonstop4h 48m

฿9,375

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Wed 12/11

07:43-12:38

1 stop7h 55m

Portland

Wed 12/11

17:30-06:23

1 stop9h 53m

฿9,669

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Wed 12/11

07:43-12:38

1 stop7h 55m

Portland

Tue 18/11

20:45-06:23

1 stop6h 38m

฿9,669

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Sat 8/11

16:10-22:51

1 stop9h 41m

Portland

Tue 11/11

07:00-17:30

1 stop7h 30m

฿9,702

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Fri 14/11

07:43-20:37

1 stop15h 54m

Portland

Tue 18/11

13:38-06:23

1 stop13h 45m

฿9,996

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Sat 6/12

07:34-12:42

1 stop8h 08m

Portland

Mon 8/12

19:44-06:06

1 stop7h 22m

฿9,996

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Wed 5/11

06:18-12:49

2 stops9h 31m

Portland

Thu 13/11

14:23-00:54

1 stop7h 31m

฿10,192

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Fri 7/11

16:10-00:26

1 stop11h 16m

Portland

Wed 12/11

08:20-16:15

Nonstop4h 55m

฿10,257

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Fri 9/1

17:26-23:48

1 stop9h 22m

Portland

Tue 13/1

06:00-16:26

1 stop7h 26m

฿10,323

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Wed 26/11

19:50-00:25

1 stop7h 35m

Portland

Tue 2/12

05:30-17:05

1 stop8h 35m

฿10,355

Flights are sorted by cheapest return flights first.

Deals found on 13/10

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Best time to book a flight from Dulles Intl

Have a flexible travel schedule? Discover the best time to fly from 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.

Travel insights for flights from Dulles Intl

Get recent, data-driven insights about flights from Dulles Intl including ideal travel times, pricing trends, and more.

When is the best time to book a flight from Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a return flight from Dulles Intl to Suvarnabhumi. Price data was last updated on 10 October 2025.

Booking 11 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, May is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport (average of ฿20,515). Flying from Washington, D.C. Dulles Intl Airport in June will prove the most costly (average of ฿35,803). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

Which airlines fly from Washington, D.C. Dulles Intl Airport?

Only one airline operates round-trip flights from Washington, D.C. Dulles Intl Airport: Qatar Airways. This airline flies to the following popular destinations: Bangkok.

เอทิฮัดแอร์เวย์
เอทิฮัดแอร์เวย์
From ฿33,663
Qatar Airways
Qatar Airways
From ฿36,096

What are popular destinations to fly to from Washington, D.C. Dulles Intl Airport?

If you’re flying from Washington, D.C. Dulles Intl Airport, these routes are more frequently taken by airlines Chicago (360 flights per day), Detroit (346 flights per day) and London (338 flights per day).

Atlanta Hartsfield-Jackson
Atlanta Hartsfield-Jackson
From ฿25,427
Mexico City Benito Juarez
Mexico City Benito Juarez
From ฿9,816
Detroit
Detroit
From ฿8,034

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

The cheapest city to fly to from Washington, D.C. Dulles Intl Airport is Detroit, with prices starting at ฿8,034. Explore other affordable destinations below.

Detroit
Detroit
From ฿8,034
Mexico City Benito Juarez
Mexico City Benito Juarez
From ฿9,816

Airline reviews for flights from Dulles Intl

Get insights into the airlines that provide service from 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 airline for your flight from Dulles Intl. In the last 7 days, Cheapflights users made a total of 17,341 searches.
See what other customers who have flown with Qatar Airways from Washington, D.C. Dulles Intl Airport have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Qatar Airways
7.4
Good
3,651 reviews
Check prices

Entertainment

7.4

Comfort

7.4

Food

7.3

Boarding

7.5

Crew

7.9

Overall

7.4

Reviews

1 / 20
6.0
Good

Chris,Jul 2025

DFW - DOH

Too crammed for the amount you have to pay. That was very uncomfortable
Qatar Airways
7.4
Good
3,651 reviews
Qatar Airways
7.4
Good
3,651 reviews
Check prices

Entertainment

7.4

Comfort

7.4

Food

7.3

Boarding

7.5

Crew

7.9

Overall

7.4

Reviews

1 / 20
6.0
Good

Chris,Jul 2025

DFW - DOH

Too crammed for the amount you have to pay. That was very uncomfortable

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Alternate flight departure points to Dulles Intl

Consider leaving from one of these other departure points that are located a short distance from Dulles Intl. Flight origins were last updated on 15 October 2025.
Flights from Reagan-National

Related info for your journey

Access useful and relevant information related to your journey from Dulles Intl. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 15 October 2025.

  • What are the most popular destinations to fly to from Washington, D.C. Dulles Intl Airport?

    The most selected flight destinations from Washington, D.C. Dulles Intl Airport for the current month are Cairo, Mumbai, Ahmedabad. While Mumbai, Cairo, Ahmedabad are the top choices made by travellers year-round.

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to anywhere?

    Users have flown out of Washington, D.C. Dulles Intl Airport for as low as ฿8,034 to Detroit Metropolitan Wayne County Airport (prices may vary depending on the airline and departure time). On average, users have booked flights for ฿31,315 to fly from Washington, D.C. Dulles Intl Airport.

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

    At the present moment the cheapest month to fly from Washington, D.C. Dulles Intl Airport is currently May; with June being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.

  • Where are the cheapest places to fly to from Washington, D.C. Dulles Intl Airport?

    Here are some of the cheapest flight destinations from Washington, D.C. Dulles Intl Airport:
    Fly from Washington, D.C. to Bangkok from ฿26,003

  • How does Cheapflights help users find flights from Dulles Intl?

    Cheapflights helps you search for flights from Dulles Intl via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

  • Why should you use Cheapflights to find cheap flight tickets from Dulles Intl?

    Cheapflights helps you find that perfect flight from Dulles Intl by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

  • Can Cheapflights find flights from Dulles Intl with no change fees?

    Yes! Cheapflights helps users easily find flights from Dulles Intl with no change fees.

  • Can Cheapflights notify me if prices for flights from Dulles Intl become cheaper?

    Yes, Cheapflights offers price alerts on flights from Dulles Intl so you can book your travels when it’s right. The Price Alerts feature is available by clicking the bell icon next to the flight deals above and providing your email address.

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How does Cheapflights help users find flights from Dulles Intl?

Cheapflights helps you search for flights from Dulles Intl via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl?

Cheapflights helps you find that perfect flight from Dulles Intl by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Dulles Intl with no change fees?

Yes! Cheapflights helps users easily find flights from Dulles Intl with no change fees.

Can Cheapflights notify me if prices for flights from Dulles Intl become cheaper?

Yes, Cheapflights offers price alerts on flights from Dulles Intl so you can book your travels when it’s right. The Price Alerts feature is available by clicking the bell icon next to the flight deals above and providing your email address.

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