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$277+ Cheap flights from Dulles Intl (IAD) to Belgium

IAD — BRU
Dec 3 — Dec 101
Thu 12/3
Thu 12/10
1 adult, Economy
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Cheap flight deals from Dulles Intl to Belgium

Cheapest flights from Dulles Intl to Belgium

Sat 12/57:40 pm -
1 stop10h 15m
Sun 12/1312:50 pm -
1 stop11h 40m
Deal found 11/2$676
Sun 11/297:40 pm -
2 stops32h 00m
Sun 12/66:55 am -
1 stop17h 35m
Deal found 10/30$683
Thu 12/248:30 pm -
1 stop12h 00m
Fri 1/153:10 pm -
1 stop33h 40m
Deal found 10/29$688
Wed 11/117:40 pm -
1 stop10h 15m
Thu 11/1912:50 pm -
1 stop11h 40m
Deal found 10/30$691
Thu 12/248:30 pm -
1 stop12h 00m
Tue 1/128:30 pm -
1 stop26h 45m
Deal found 11/1$695
Mon 11/308:30 pm -
1 stop16h 05m
Mon 12/710:20 am -
1 stop12h 55m
Deal found 10/31$698
Tue 11/177:40 pm -
1 stop12h 55m
Tue 11/243:10 pm -
2 stops33h 20m
Deal found 11/1$701
Sat 12/58:30 pm -
1 stop17h 20m
Sun 12/137:45 pm -
2 stops27h 30m
Deal found 10/30$704
Thu 12/38:30 pm -
2 stops16h 10m
Thu 12/1010:20 am -
1 stop12h 55m
Deal found 11/2$705
Wed 11/258:30 pm -
1 stop16h 05m
Tue 12/13:10 pm -
1 stop32h 05m
Deal found 11/2$706

Find flight deals from Dulles Intl to Belgium

Round-trip from

$673
(Cheapflightsfares)

One-way from

$277
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$922

Good round-trip deal

$1,050 or less

Good one-way deal

$799 or less
From Washington, D.C. Dulles Intl to Belgium
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One-way flight from Washington, D.C. Dulles Intl to Belgium
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Highest demand for flights based on searches. 19% potential increase in price ($230 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in November 2026
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Belgium.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Belgium.
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Belgium 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

Sat 11/14

5:25 pm-10:15 am

3 stops34h 50m

Brussels Bruxelles-National

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$364

Washington, D.C.Brussels

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

IADBRU

Washington, D.C. Dulles Intl

Tue 4/6

5:40 pm-8:45 pm

2 stops21h 05m

Brussels Bruxelles-National

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$481

Washington, D.C.Brussels

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

IADBRU

Washington, D.C. Dulles Intl

Fri 11/13

10:30 pm-11:50 pm

1 stop19h 20m

Brussels Bruxelles-National

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$494

Washington, D.C.Brussels

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

IADBRU

Washington, D.C. Dulles Intl

Sat 11/14

5:25 pm-11:50 pm

1 stop24h 25m

Brussels Bruxelles-National

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$494
Quickest round-trip

Washington, D.C.Brussels

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

IADBRU

Washington, D.C. Dulles Intl

Sun 11/29

5:45 pm-7:15 am

Nonstop7h 30m

Brussels Bruxelles-National

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$704

Washington, D.C.Brussels

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

IADBRU

Washington, D.C. Dulles Intl

Wed 11/25

5:45 pm-7:15 am

Nonstop7h 30m

Brussels Bruxelles-National

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$754

Washington, D.C.Brussels

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

IADBRU

Washington, D.C. Dulles Intl

Mon 12/14

12:38 pm-11:50 pm

2 stops29h 12m

Brussels Bruxelles-National

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$799

Washington, D.C.Brussels

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

IADBRU

Washington, D.C. Dulles Intl

Sat 11/28

5:45 pm-7:15 am

Nonstop7h 30m

Brussels Bruxelles-National

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$804

Washington, D.C.Brussels

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

IADBRU

Washington, D.C. Dulles Intl

Sun 11/29

9:55 am-7:50 am

1 stop15h 55m

Brussels Bruxelles-National

Tue 12/8

8:25 am-2:35 pm

1 stop12h 10m

$806

Washington, D.C.Brussels

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

IADBRU

Washington, D.C. Dulles Intl

Fri 11/13

5:45 pm-7:15 am

Nonstop7h 30m

Brussels Bruxelles-National

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$854

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Dulles Intl to Belgium

Have a flexible travel schedule? Discover the best time to fly to Belgium from Dulles Intl with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Belgium

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

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Belgium (average of $708). Flying from Washington, D.C. Dulles Intl Airport to Belgium 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 BE?

When flying from Washington, D.C. Dulles Intl Airport to Belgium, 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 Belgium

The most flights from IAD to BE0 are scheduled on a Monday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).

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

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to Belgium, you should look to book at least 65 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 Belgium

Get a feel of what it's like to fly with Scandinavian Airlines,Aer Lingus, andBrussels Airlines from Washington, D.C. Dulles Intl Airport to Belgium by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Scandinavian Airlines
7.4
Good
2,030 reviews

Overall

7.4

Comfort

7.4

Boarding

7.7

Entertainment

6.8

Crew

8.1

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
2,030 reviews
Scandinavian Airlines
7.4
Good
2,030 reviews

Overall

7.4

Comfort

7.4

Boarding

7.7

Entertainment

6.8

Crew

8.1

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
1,877 reviews
Scandinavian Airlines
7.4
Good
2,030 reviews

Overall

7.4

Comfort

7.4

Boarding

7.7

Entertainment

6.8

Crew

8.1

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
437 reviews
Scandinavian Airlines
7.4
Good
2,030 reviews

Overall

7.4

Comfort

7.4

Boarding

7.7

Entertainment

6.8

Crew

8.1

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
7.3
Good
10,463 reviews
Scandinavian Airlines
7.4
Good
2,030 reviews

Overall

7.4

Comfort

7.4

Boarding

7.7

Entertainment

6.8

Crew

8.1

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
766 reviews
Scandinavian Airlines
7.4
Good
2,030 reviews

Overall

7.4

Comfort

7.4

Boarding

7.7

Entertainment

6.8

Crew

8.1

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

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

    United Airlines, KLM, and Turkish Airlines can get you from Washington, D.C. Dulles Intl Airport to Belgium in just under 14h. Your travel time can differ by up to 13h 20m. There are 3879 mi between Washington, D.C. Dulles Intl Airport and Belgium. This flight may include one or multiple stops.

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

    One-way options have recently been found by users for as low as $232 on Icelandair. Other airlines that offer cheap prices include Aer Lingus from $401 and Scandinavian Airlines from $456 one-way.

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

    While some choose either Washington, D.C. Dulles Intl - Charleroi Brussels or Washington, D.C. Dulles Intl - Antwerp Deurne, Washington, D.C. Dulles Intl - Brussels Bruxelles-National is the most popular route from Washington, D.C. Dulles Intl Airport to Belgium.

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. Dulles Intl Airport to Belgium consider choosing Brussels Airlines (78%), United Airlines (78%) or Air Canada (73%) as they are the most reliable in getting you off to your destination on time.

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

    The cheapest flight price from Washington, D.C. Dulles Intl Airport to Belgium is $554. On average you can expect to pay $2,489. The most popular route, (Washington, D.C. Dulles Intl - Brussels Bruxelles-National), can usually be booked for $431.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Belgium 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 Belgium?

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Belgium (average of $708). Flying from Washington, D.C. Dulles Intl Airport to Belgium 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

Top 7 airlines flying from Dulles Intl to Belgium

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$385Average$676FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$467Average$637FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$602Average$654FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$680Average$865FlexibilityNo cancel feeOn-timeN/A
Brussels AirlinesCheapest$762Average$1,611FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$763Average$1,192FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$786Average$1,331FlexibilityNo cancel feeOn-time76%

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