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฿2,912+ 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 10/1. 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
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

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 5 December 2025.

Good round-trip deal

฿8,454 or less

Good one-way deal

฿9,616 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 5 December 2025.

Mon 5/113:50IAD - PDX
1 stop9h 55mเซาท์เวสต์แอร์ไลน์
Thu 8/106:00PDX - IAD
1 stop7h 50mเซาท์เวสต์แอร์ไลน์
Deal found 2/12฿9,408
Thu 5/218:04IAD - PDX
1 stop21h 34mอลาสกาแอร์ไลน์
Sat 7/206:00PDX - IAD
1 stop7h 26mอลาสกาแอร์ไลน์
Deal found 3/12฿9,440
Wed 25/207:05IAD - PDX
2 stops16h 40mอลาสกาแอร์ไลน์
Sat 28/206:00PDX - IAD
1 stop8h 20mอลาสกาแอร์ไลน์
Deal found 4/12฿9,536
Sun 11/105:30IAD - PDX
2 stops15h 10mเซาท์เวสต์แอร์ไลน์
Wed 14/105:05PDX - IAD
2 stops13h 50mเซาท์เวสต์แอร์ไลน์
Deal found 3/12฿9,632
Fri 23/115:42IAD - PDX
1 stop10h 03mเดลต้า
Sun 25/113:30PDX - IAD
1 stop6h 40mเดลต้า
Deal found 4/12฿9,664
Mon 5/118:29IAD - PDX
1 stop18h 15mอลาสกาแอร์ไลน์
Fri 9/114:31PDX - IAD
2 stops23h 33mอลาสกาแอร์ไลน์
Deal found 3/12฿9,728
Fri 6/218:04IAD - PDX
1 stop18h 19mอลาสกาแอร์ไลน์
Thu 19/207:05PDX - IAD
1 stop7h 15mอลาสกาแอร์ไลน์
Deal found 4/12฿9,760
Mon 5/105:05IAD - PDX
1 stop7h 40mเซาท์เวสต์แอร์ไลน์
Mon 12/106:00PDX - IAD
1 stop7h 50mเซาท์เวสต์แอร์ไลน์
Deal found 4/12฿9,856
Tue 13/107:30IAD - PDX
1 stop16h 29mเดลต้า
Tue 20/119:37PDX - IAD
2 stops13h 15mเดลต้า
Deal found 4/12฿9,984
Mon 2/317:40IAD - PDX
1 stop7h 50mเซาท์เวสต์แอร์ไลน์
Thu 5/314:50PDX - IAD
1 stop6h 25mเซาท์เวสต์แอร์ไลน์
Deal found 4/12฿10,048
Sun 18/107:05IAD - PDX
1 stop8h 27mเดลต้า
Mon 19/100:40PDX - IAD
1 stop9h 55mเดลต้า
Deal found 4/12฿10,144
Thu 19/207:05IAD - PDX
2 stops16h 40mอลาสกาแอร์ไลน์
Sun 22/214:31PDX - IAD
1 stop23h 56mอลาสกาแอร์ไลน์
Deal found 4/12฿10,176

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 5 December 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

Wed 25/2

07:05-20:45

2 stops16h 40m

Portland

Sat 28/2

06:00-17:20

1 stop8h 20m

฿9,536

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Mon 5/1

18:29-09:44

1 stop18h 15m

Portland

Mon 12/1

14:31-17:04

2 stops23h 33m

฿9,728

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Fri 6/2

05:30-10:15

1 stop7h 45m

Portland

Wed 18/2

06:00-21:55

2 stops12h 55m

฿9,856

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Wed 14/1

07:05-16:30

2 stops12h 25m

Portland

Sat 17/1

13:30-23:10

1 stop6h 40m

฿9,984

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Tue 17/3

07:00-13:12

1 stop9h 12m

Portland

Tue 24/3

23:15-11:32

1 stop9h 17m

฿9,984

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Thu 5/3

17:45-20:40

Nonstop5h 55m

Portland

Sun 8/3

23:10-07:03

Nonstop4h 53m

฿10,144

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Wed 25/2

06:00-15:11

2 stops12h 11m

Portland

Fri 27/2

07:10-23:55

2 stops13h 45m

฿10,176

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Mon 5/1

18:29-09:44

1 stop18h 15m

Portland

Thu 8/1

14:31-17:04

2 stops23h 33m

฿10,368

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Mon 12/1

14:20-20:12

1 stop8h 52m

Portland

Thu 15/1

13:30-23:10

1 stop6h 40m

฿10,784

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Sat 7/2

06:00-12:44

2 stops9h 44m

Portland

Thu 19/2

07:10-23:55

2 stops13h 45m

฿10,816

Flights are sorted by cheapest return flights first.

Deals found on 4/12

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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 28 November 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 ฿20,097). Flying from Washington, D.C. Dulles Intl Airport in June will prove the most costly (average of ฿34,946). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

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 London (356 flights per day), Detroit (298 flights per day) and New York (220 flights per day).

Mexico City Benito Juarez
Mexico City Benito Juarez
From ฿9,616
Detroit
Detroit
From ฿7,871

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 ฿7,871. Explore other affordable destinations below.

Detroit
Detroit
From ฿7,871
Mexico City Benito Juarez
Mexico City Benito Juarez
From ฿9,616

Browse thousands of different options on Cheapflights for your next trip

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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 5 December 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 5 December 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 Mumbai, Ahmedabad, Bengaluru. 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 ฿7,871 to Detroit Metropolitan Wayne County Airport (prices may vary depending on the airline and departure time). On average, users have booked flights for ฿31,058 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 ฿26,209
    Fly from Washington, D.C. to Phuket City from ฿29,889

  • 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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