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$345+ 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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BRU
Sep 9 — Sep 161
Wed 9/9
Wed 9/16
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Brussels are usually found in January or September, booked 71 days in advance, depart on a Thursday or Tuesday and return on a Tuesday

Cheap 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 August 10, 2026.

This Mytrip deal was found by Cheapflights users on 8/8. 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.
Mon 9/215:40 pm -
2 stops18h 00m
Tue 9/2910:55 am -
2 stops34h 15m
Deal found 8/8$690
This Mytrip deal was found by Cheapflights users on 8/5. 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.
Wed 10/1411:20 pm -
1 stop31h 35m
Tue 10/279:55 pm -
3 stops27h 10m
Deal found 8/5$693
This AirNGo deal was found by Cheapflights users on 8/6. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:20 pm -
1 stop12h 15m
Tue 9/296:55 pm -
2 stops28h 05m
Deal found 8/6$697
This AirNGo deal was found by Cheapflights users on 8/9. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:20 pm -
2 stops15h 55m
Wed 10/710:20 am -
1 stop12h 40m
Deal found 8/9$699
This Justfly.com deal was found by Cheapflights users on 8/5. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/104:45 pm -
1 stop19h 20m
Wed 11/1811:35 am -
1 stop33h 05m
Deal found 8/5$700
This Cheapflightsfares deal was found by Cheapflights users on 8/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:20 pm -
1 stop12h 15m
Thu 9/1710:20 am -
1 stop12h 40m
Deal found 8/7$701
This Expedia deal was found by Cheapflights users on 8/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/118:20 pm -
1 stop16h 10m
Sat 10/178:30 pm -
1 stop26h 30m
Deal found 8/10$702
This Cheapflightsfares deal was found by Cheapflights users on 8/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:20 pm -
1 stop17h 30m
Tue 10/69:15 pm -
2 stops25h 45m
Deal found 8/9$704
This Booking.com deal was found by Cheapflights users on 8/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/258:30 pm -
1 stop17h 20m
Wed 12/27:20 pm -
2 stops27h 55m
Deal found 8/10$705
This Scandinavian Airlines deal was found by Cheapflights users on 8/5. 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.
Mon 11/308:30 pm -
1 stop17h 20m
Sun 12/67:20 pm -
2 stops27h 55m
Deal found 8/5$706
This Cheapflightsfares deal was found by Cheapflights users on 8/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:20 pm -
1 stop16h 10m
Sun 9/209:20 pm -
2 stops25h 40m
Deal found 8/7$707
This Mytrip deal was found by Cheapflights users on 8/9. 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.
Tue 9/810:35 pm -
2 stops18h 20m
Tue 9/1512:20 pm -
2 stops32h 50m
Deal found 8/9$719

Find 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 August 10, 2026.

Round-trip from

$690
(Mytrip)

One-way from

$345
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$908
From Washington, D.C. Dulles Intl to Brussels
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Brussels
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($284 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($48 potential savings vs. average RT price).
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Average for round-trip flights in August 2026
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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 August 10, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Brussels

IAD Washington, D.C. Dulles Intl - BRU Brussels Bruxelles-National

IADBRU

Washington, D.C. Dulles Intl

Fri 9/11

8:20 pm-2:35 pm

1 stop12h 15m

Brussels Bruxelles-National

Tue 9/22

6:55 pm-5:00 pm

2 stops28h 05m

$726

Washington, D.C.Brussels

IAD Washington, D.C. Dulles Intl - BRU Brussels Bruxelles-National

IADBRU

Washington, D.C. Dulles Intl

Mon 9/21

8:20 pm-6:15 pm

2 stops15h 55m

Brussels Bruxelles-National

Tue 9/29

6:55 pm-5:00 pm

2 stops28h 05m

$738

Washington, D.C.Brussels

IAD Washington, D.C. Dulles Intl - BRU Brussels Bruxelles-National

IADBRU

Washington, D.C. Dulles Intl

Wed 8/26

8:20 pm-9:40 am

1 stop31h 20m

Brussels Bruxelles-National

Tue 9/8

7:10 pm-5:00 pm

1 stop27h 50m

$767

Washington, D.C.Brussels

IAD Washington, D.C. Dulles Intl - BRU Brussels Bruxelles-National

IADBRU

Washington, D.C. Dulles Intl

Sun 11/8

8:10 pm-6:50 pm

1 stop16h 40m

Brussels Bruxelles-National

Mon 11/16

8:10 pm-5:00 pm

1 stop26h 50m

$780

Washington, D.C.Brussels

IAD Washington, D.C. Dulles Intl - CRL Charleroi Brussels

IADCRL

Washington, D.C. Dulles Intl

Mon 10/12

5:00 pm-11:55 am

1 stop12h 55m

Charleroi Brussels

Mon 10/19

6:05 pm-6:50 pm

2 stops30h 45m

$811

Washington, D.C.Brussels

IAD Washington, D.C. Dulles Intl - BRU Brussels Bruxelles-National

IADBRU

Washington, D.C. Dulles Intl

Tue 9/22

10:05 pm-8:00 pm

1 stop15h 55m

Brussels Bruxelles-National

Tue 9/29

12:00 pm-2:15 pm

Nonstop8h 15m

$819
Quickest round-trip

Washington, D.C.Brussels

IAD Washington, D.C. Dulles Intl - BRU Brussels Bruxelles-National

IADBRU

Washington, D.C. Dulles Intl

Mon 9/21

5:45 pm-7:15 am

Nonstop7h 30m

Brussels Bruxelles-National

Tue 9/29

12:00 pm-2:15 pm

Nonstop8h 15m

$824

Washington, D.C.Brussels

IAD Washington, D.C. Dulles Intl - CRL Charleroi Brussels

IADCRL

Washington, D.C. Dulles Intl

Mon 11/9

5:50 pm-11:40 am

1 stop11h 50m

Charleroi Brussels

Tue 11/17

4:10 pm-4:20 pm

2 stops30h 10m

$838

Washington, D.C.Brussels

IAD Washington, D.C. Dulles Intl - CRL Charleroi Brussels

IADCRL

Washington, D.C. Dulles Intl

Tue 9/29

8:30 pm-10:55 pm

2 stops20h 25m

Charleroi Brussels

Fri 10/2

6:35 pm-8:05 pm

2 stops31h 30m

$856

Washington, D.C.Brussels

IAD Washington, D.C. Dulles Intl - CRL Charleroi Brussels

IADCRL

Washington, D.C. Dulles Intl

Sun 9/6

10:35 pm-10:55 pm

2 stops18h 20m

Charleroi Brussels

Tue 9/15

12:20 pm-3:10 pm

2 stops32h 50m

$858

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 41 resultsSorted by cheapest first
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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

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Brussels (average of $600). Flying from Washington, D.C. Dulles Intl Airport to Brussels in June is currently the most expensive (average of $1,377). 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 August 10, 2026.

When flying from Washington, D.C. Dulles Intl Airport to Brussels, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 August 10, 2026.

The most flights from IAD to BR1 are scheduled on a Monday (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?

Airfare is typical for this route at the moment.
Washington, D.C. Dulles Intl Airport to Brussels flights typically cost between $676 and $1,251 in September.
The cheapest round-trip price found within the last 5 days was $690 on Multiple Airlines (Sep 21-Sep 29).

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

The best time to book flights from Washington, D.C. Dulles Intl Airport to Brussels is 67 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.

The best insider tips for Washington, D.C. Dulles Intl Airport to Brussels flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Brussels trip
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on United Airlines

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

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 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

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 August 10, 2026.
See what other customers who have flown with Scandinavian Airlines,United Airlines, andAer Lingus 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.
Scandinavian Airlines
7.4
Good
1,936 reviews

Comfort

7.3

Crew

8.0

Boarding

7.7

Overall

7.4

Entertainment

6.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(
Scandinavian Airlines
7.4
Good
1,936 reviews
Scandinavian Airlines
7.4
Good
1,936 reviews

Comfort

7.3

Crew

8.0

Boarding

7.7

Overall

7.4

Entertainment

6.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(
United Airlines
7.4
Good
10,095 reviews
Scandinavian Airlines
7.4
Good
1,936 reviews

Comfort

7.3

Crew

8.0

Boarding

7.7

Overall

7.4

Entertainment

6.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(
Aer Lingus
7.3
Good
1,693 reviews
Scandinavian Airlines
7.4
Good
1,936 reviews

Comfort

7.3

Crew

8.0

Boarding

7.7

Overall

7.4

Entertainment

6.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(
Brussels Airlines
7.3
Good
430 reviews
Scandinavian Airlines
7.4
Good
1,936 reviews

Comfort

7.3

Crew

8.0

Boarding

7.7

Overall

7.4

Entertainment

6.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(
Icelandair
6.9
Okay
728 reviews
Scandinavian Airlines
7.4
Good
1,936 reviews

Comfort

7.3

Crew

8.0

Boarding

7.7

Overall

7.4

Entertainment

6.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(

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.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Brussels?

    Airlines like Scandinavian Airlines, SWISS, and United Airlines fly from Washington, D.C. Dulles Intl Airport to Brussels in about 12h 15m. The time it takes to get you to your destination can typically vary by up to 4h 25m. Airlines will cover a distance of 3879 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 Icelandair. Our recent data shows that you can find tickets from as low as $385 on this airline. Additional options worth looking into are TAP AIR PORTUGAL and Scandinavian Airlines, starting at $440 and $463 round-trip. These flights start at 54% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Brussels one-way?

    One-way options have recently been found by users for as low as $298 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Scandinavian Airlines from $370 and Aer Lingus from $523 one-way.

  • 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 (54%), United Airlines (54%) and Air Canada (35%).

  • 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 $491. On average you can expect to pay $2,655. The most popular route, (Washington, D.C. Dulles Intl - Brussels Bruxelles-National), can usually be booked for $508.

  • 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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Brussels (average of $600). Flying from Washington, D.C. Dulles Intl Airport to Brussels in June is currently the most expensive (average of $1,377). 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

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Alternative routes for Dulles Intl to Brussels

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Bruxelles-National flights
Baltimore to Bruxelles-National flights
Dulles Intl to Antwerp flights

Top 8 airlines flying from Dulles Intl to Brussels

Discover the top 8 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 August 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$393Average$676FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$440Average$730FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$463Average$586FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$531Average$633FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$539Average$797FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$652Average$1,093FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$762Average$1,270FlexibilityNo cancel feeOn-time76%
Brussels AirlinesCheapest$762Average$1,535FlexibilityNo cancel feeOn-timeN/A

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