United's Polaris offers lie-flat seats with noise-reducing headphones and large entertainment screens.
Premium Plus seats offer extra legroom and upgraded food and drink on international flights.

Most accurate provider | Justfly.com 3 stars |
|---|---|
Most trusted provider | Justfly.com 3 stars |
Round-trip from | $513 (Flighttix) |
One-way from | $261 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $873 |
Good round-trip deal | $921 or less |
Good one-way deal | $620 or less |
Fly from
Fly to
Route
Depart
Return
Price
Washington, D.C.Brussels
IAD - BRU
IADBRU
Washington, D.C. Dulles Intl
Mon 2/9
8:30 pm-7:50 pm
1 stop17h 20m
Brussels Bruxelles-National
Sat 2/21
10:20 am-6:50 pm
1 stop14h 30m
Washington, D.C.Brussels
IAD - BRU
IADBRU
Washington, D.C. Dulles Intl
Wed 3/11
7:20 pm-1:15 pm
1 stop12h 55m
Brussels Bruxelles-National
Fri 3/20
11:55 am-3:35 pm
Nonstop8h 40m
Washington, D.C.Brussels
IAD - BRU
IADBRU
Washington, D.C. Dulles Intl
Mon 3/9
7:20 pm-1:15 pm
1 stop12h 55m
Brussels Bruxelles-National
Fri 3/20
11:55 am-3:35 pm
Nonstop8h 40m
Washington, D.C.Brussels
IAD - BRU
IADBRU
Washington, D.C. Dulles Intl
Wed 3/11
7:20 pm-1:15 pm
1 stop12h 55m
Brussels Bruxelles-National
Wed 3/18
11:55 am-3:35 pm
Nonstop8h 40m
Washington, D.C.Brussels
IAD - BRU
IADBRU
Washington, D.C. Dulles Intl
Sun 2/8
10:15 pm-8:55 am
1 stop28h 40m
Brussels Bruxelles-National
Fri 2/20
11:55 am-2:35 pm
Nonstop8h 40m
Washington, D.C.Brussels
IAD - BRU
IADBRU
Washington, D.C. Dulles Intl
Sun 2/1
6:20 pm-1:15 pm
1 stop12h 55m
Brussels Bruxelles-National
Tue 2/10
11:55 am-2:35 pm
Nonstop8h 40m
Washington, D.C.Brussels
IAD - BRU
IADBRU
Washington, D.C. Dulles Intl
Tue 3/10
6:45 pm-7:15 am
Nonstop7h 30m
Brussels Bruxelles-National
Fri 3/20
11:55 am-3:35 pm
Nonstop8h 40m
Washington, D.C.Brussels
IAD - BRU
IADBRU
Washington, D.C. Dulles Intl
Sun 3/8
6:45 pm-7:15 am
Nonstop7h 30m
Brussels Bruxelles-National
Thu 3/19
11:55 am-3:35 pm
Nonstop8h 40m
Washington, D.C.Brussels
IAD - BRU
IADBRU
Washington, D.C. Dulles Intl
Wed 2/11
5:45 pm-7:15 am
Nonstop7h 30m
Brussels Bruxelles-National
Thu 2/19
11:55 am-2:35 pm
Nonstop8h 40m
Washington, D.C.Brussels
IAD - BRU
IADBRU
Washington, D.C. Dulles Intl
Wed 2/11
5:45 pm-7:15 am
Nonstop7h 30m
Brussels Bruxelles-National
Fri 2/20
11:55 am-2:35 pm
Nonstop8h 40m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars |
The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Brussels Bruxelles-National Airport may vary depending on when you book. For the best chance of a lower fare, look to book 74 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Brussels Bruxelles-National Airport (average of $436). Flying from Washington, D.C. Dulles Intl Airport to Brussels Bruxelles-National Airport in June is currently the most expensive (average of $679). 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.
One of the essential ways to save on airfare from Washington, D.C. Dulles Intl Airport to Brussels Bruxelles-National Airport 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 48% on airfare.
Istanbul (IST) – chosen by Cheapflights users on 82% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to Brussels Bruxelles-National Airport on Cheapflights.
Istanbul (IST) is the most affordable 1-stop option, with an average round-trip price of $654.
Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 10h 20m.
Flights via Dublin (DUB) offer the fastest connection on this route, with an average layover time of 1h 43m.
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Kent,Aug 2025
CPH - SEA
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Kent,Aug 2025
CPH - SEA
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Kent,Aug 2025
CPH - SEA
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Kent,Aug 2025
CPH - SEA
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Kent,Aug 2025
CPH - SEA
Food
Boarding
Comfort
Overall
Entertainment
Crew
Reviews
Kent,Aug 2025
CPH - SEA
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$419 | Average$572 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$441 | Average$759 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$480 | Average$713 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$480 | Average$796 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$511 | Average$704 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$539 | Average$786 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$540 | Average$624 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$555 | Average$726 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$592 | Average$929 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$633 | Average$1,073 | FlexibilityNo cancel fee | On-timeN/A |