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$251+ Cheap flights from Dulles Intl (IAD) to Brussels

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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BRU
Jul 30 — Aug 61
Wed 7/30
Wed 8/6
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Brussels are usually found in September or January, booked 74 days in advance, depart on a Wednesday or Friday and return on a Thursday

Cheap flight deals from Dulles Intl to Brussels

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Brussels (BR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 25, 2025.

Round-trip from

$570
(Scandinavian Airlines)

One-way from

$251
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$988
From Washington, D.C. Dulles Intl to Brussels
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One-way flight from Washington, D.C. Dulles Intl to Brussels
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Highest demand for flights based on searches. 0% potential increase in price ($7 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Dulles Intl to Brussels

Cheapest flights from Dulles Intl to Brussels
Explore the most affordable flight options available from Dulles Intl to Brussels. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 25, 2025.

This Scandinavian Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:30 pmIAD - BRU
1 stop31h 10mScandinavian Airlines
Wed 12/3110:20 amBRU - IAD
1 stop12h 55mScandinavian Airlines
Deal found 7/24$570
This Icelandair deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/178:30 pmIAD - BRU
1 stop10h 20mIcelandair
Sat 10/251:50 pmBRU - IAD
1 stop11h 30mIcelandair
Deal found 7/21$571
This CheapOair deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/265:05 pmIAD - BRU
1 stop10h 30mAer Lingus
Tue 12/210:15 amBRU - IAD
1 stop11h 20mAer Lingus
Deal found 7/23$574
This Mytrip deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/75:45 pmIAD - CRL
2 stops18h 00mMultiple Airlines
Tue 9/1612:05 pmCRL - IAD
2 stops33h 15mMultiple Airlines
Deal found 7/24$577
This Flighttix deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/189:35 amIAD - BRU
1 stop16h 25mMultiple Airlines
Tue 8/2612:00 pmBRU - IAD
Nonstop8h 25mMultiple Airlines
Deal found 7/22$578
This lol.travel deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1812:35 pmIAD - BRU
1 stop13h 10mUnited Airlines
Tue 8/2612:00 pmBRU - IAD
Nonstop8h 25mUnited Airlines
Deal found 7/24$579
This FlightHub deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/199:40 pmIAD - BRU
1 stop35h 35mTurkish Airlines
Tue 9/237:15 amBRU - IAD
1 stop18h 30mTurkish Airlines
Deal found 7/23$587
This Flighttix deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/185:45 pmIAD - BRU
Nonstop7h 30mLufthansa
Tue 8/2612:00 pmBRU - IAD
Nonstop8h 25mLufthansa
Deal found 7/22$588
This Brussels Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/135:35 pmIAD - BRU
Nonstop7h 50mBrussels Airlines
Wed 8/2010:45 amBRU - IAD
Nonstop8h 45mBrussels Airlines
Deal found 7/23$591
This Gotogate deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/125:00 pmIAD - BRU
1 stop16h 05mTAP AIR PORTUGAL
Wed 10/228:55 pmBRU - IAD
1 stop24h 25mTAP AIR PORTUGAL
Deal found 7/24$607
This CheapOair deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/135:55 pmIAD - BRU
1 stop10h 00mBritish Airways
Mon 8/189:15 pmBRU - IAD
2 stops27h 37mBritish Airways
Deal found 7/22$610

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Brussels that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 25, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Brussels that are best for you.

Fly from

Dulles Intl

Fly to

Brussels

Route

Depart

Return

Price

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Thu 12/25

8:30 pm-9:40 am

1 stop31h 10m

Brussels Bruxelles-National

Wed 12/31

10:20 am-5:15 pm

1 stop12h 55m

$570

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Fri 10/17

8:30 pm-12:50 pm

1 stop10h 20m

Brussels Bruxelles-National

Sat 10/25

1:50 pm-7:20 pm

1 stop11h 30m

$571

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Wed 11/26

5:05 pm-9:35 am

1 stop10h 30m

Brussels Bruxelles-National

Tue 12/2

10:15 am-3:35 pm

1 stop11h 20m

$574

Washington, D.C.Brussels

IAD - CRL

IADCRL

Washington, D.C. Dulles Intl

Sun 9/7

5:45 pm-5:45 pm

2 stops18h 00m

Charleroi Brussels

Tue 9/16

12:05 pm-3:20 pm

2 stops33h 15m

$577

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Mon 8/18

9:35 am-8:00 am

1 stop16h 25m

Brussels Bruxelles-National

Tue 8/26

12:00 pm-2:25 pm

Nonstop8h 25m

$578

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Mon 8/18

12:35 pm-7:45 am

1 stop13h 10m

Brussels Bruxelles-National

Tue 8/26

12:00 pm-2:25 pm

Nonstop8h 25m

$579

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Fri 9/19

9:40 pm-3:15 pm

1 stop35h 35m

Brussels Bruxelles-National

Tue 9/23

7:15 am-7:45 pm

1 stop18h 30m

$587

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Mon 8/18

5:45 pm-7:15 am

Nonstop7h 30m

Brussels Bruxelles-National

Tue 8/26

12:00 pm-2:25 pm

Nonstop8h 25m

$588

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Wed 8/13

5:35 pm-7:25 am

Nonstop7h 50m

Brussels Bruxelles-National

Wed 8/20

10:45 am-1:30 pm

Nonstop8h 45m

$591

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Tue 8/12

5:00 pm-3:05 pm

1 stop16h 05m

Brussels Bruxelles-National

Wed 10/22

8:55 pm-3:20 pm

1 stop24h 25m

$607

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/24

Showing 1-10 of 16 results
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The best insider tips for Washington, D.C. Dulles Intl Airport to Brussels flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Brussels trip
Airlines
United Airlines

United's Polaris Business Class offers lie-flat seats and Saks Fifth Avenue bedding.


United's Premium Plus includes priority check-in and two checked bags on international flights.

Read more about United Airlinesby Harriet Baskas
Brussels Airlines

Brussels Airlines offers lie-flat beds in business class with direct aisle access for most seats.


Economy class includes a free meal and seatback entertainment on long-haul flights.

Read more about Brussels Airlinesby John Walton
Lufthansa

Lufthansa's Allegris cabins offer advanced comfort features on long-haul flights.


Lufthansa's economy includes meals and beverages on international flights.

Read more about Lufthansaby Blane Bachelor
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
John Walton

John Walton

Expert on Brussels Airlines

John Walton

John Walton

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Read more
Blane Bachelor

Blane Bachelor

Expert on Lufthansa

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more

Best time to book a flight from Dulles Intl to Brussels

Have a flexible travel schedule? Discover the best time to fly to Brussels from Dulles Intl with our price prediction graph.
Estimated round-trip 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 from Washington, D.C. Dulles Intl Airport to Brussels

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Brussels?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Brussels. Price data was last updated on July 18, 2025.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Brussels is 74 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Brussels (average of $614). Flying from Washington, D.C. Dulles Intl Airport to Brussels in June is currently the most expensive (average of $1,081). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IAD to BRU?

Find hourly flight availability from Dulles Intl to Brussels. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 25, 2025.

One of the essential ways to save on airfare from Washington, D.C. Dulles Intl Airport to Brussels is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 49% on airfare.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to Brussels

Explore weekly flight availability from Dulles Intl to Brussels. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 25, 2025.

The most flights from IAD to BR1 are scheduled on a Wednesday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (6 on average).

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Brussels?

Reviews of airlines servicing Brussels

Get insights into the airlines that provide service to Brussels. 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 Brussels. Reviews last updated July 25, 2025.
See what other customers who have flown with United Airlines, Virgin Atlantic, and Turkish Airlines from Washington, D.C. Dulles Intl Airport to Brussels have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,880 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,880 reviews
United Airlines
7.4
Good
8,880 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Virgin Atlantic
7.4
Good
655 reviews
United Airlines
7.4
Good
8,880 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Turkish Airlines
7.3
Good
3,916 reviews
United Airlines
7.4
Good
8,880 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Scandinavian Airlines
7.3
Good
1,442 reviews
United Airlines
7.4
Good
8,880 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Brussels Airlines
7.3
Good
350 reviews
United Airlines
7.4
Good
8,880 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Brussels. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Brussels round-trip?

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Brussels is Scandinavian Airlines. Our recent data shows that you can find tickets from as low as $570 on this airline. Additional options worth looking into are Icelandair and Aer Lingus, starting at $572 and $574 round-trip. These flights start at 32% lower than the current average price 3 months from now.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Brussels?

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Brussels are Brussels Airlines (62%), United Airlines (62%) and Air Canada (40%).

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Brussels?

    The cheapest flight price from Washington, D.C. Dulles Intl Airport to Brussels is $420. On average you can expect to pay $2,179. The most popular route, (Washington, D.C. Dulles Intl - Brussels Bruxelles-National), can usually be booked for $441.

  • Can I find deals for flights from Dulles Intl to Brussels that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Brussels flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Brussels?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Brussels.

  • Can I find deals for business class flights from Dulles Intl to Brussels?

    Yes. Cheapflights offers flight deals from Dulles Intl to Brussels by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Brussels (average of $614). Flying from Washington, D.C. Dulles Intl Airport to Brussels in June is currently the most expensive (average of $1,081). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from Dulles Intl to Brussels

Discover the top 10 airlines that operate flights from Dulles Intl to Brussels. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$369Average$606FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$403Average$571FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$449Average$758FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$492Average$954FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$496Average$748FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$516Average$726FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$552Average$650FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$564Average$790FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$607Average$1,036FlexibilityNo cancel feeOn-time69%
Brussels AirlinesCheapest$633Average$1,061FlexibilityNo cancel feeOn-timeN/A

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