United Polaris offers lie-flat seats with Saks Fifth Avenue bedding on long-haul routes.
United Premium Plus includes extra legroom and upgraded meals on international routes.

Round-trip from | $340 (Ticket) |
|---|---|
One-way from | $176 (Kiwi.com) |
Popular in | December |
Cheapest in | February |
Average price | $613 |
Fly from
Fly to
Route
Depart
Return
Price
BostonBrussels
BOS - BRU
BOSBRU
Boston Logan Intl
Sun 4/5
3:35 pm-7:10 am
1 stop9h 35m
Brussels Bruxelles-National
Thu 4/16
9:25 am-2:52 pm
1 stop11h 27m
BostonBrussels
BOS - BRU
BOSBRU
Boston Logan Intl
Sat 1/31
7:22 pm-7:15 am
1 stop29h 53m
Brussels Bruxelles-National
Mon 2/16
3:45 pm-2:05 pm
1 stop28h 20m
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Fri 5/1
7:00 pm-12:55 pm
1 stop32h 55m
Brussels Bruxelles-National
Sun 5/10
1:50 pm-8:40 pm
1 stop15h 50m
BostonBrussels
BOS - BRU
BOSBRU
Boston Logan Intl
Mon 4/6
5:40 pm-10:40 am
2 stops35h 00m
Brussels Bruxelles-National
Tue 4/14
9:10 pm-3:35 pm
2 stops24h 25m
BostonBrussels
BOS - BRU
BOSBRU
Boston Logan Intl
Wed 4/8
6:40 pm-1:15 pm
2 stops12h 35m
Brussels Bruxelles-National
Wed 4/15
9:25 am-6:19 pm
2 stops14h 54m
BostonBrussels
BOS - BRU
BOSBRU
Boston Logan Intl
Tue 1/20
9:50 pm-1:35 pm
1 stop9h 45m
Brussels Bruxelles-National
Mon 1/26
8:10 pm-8:20 pm
1 stop30h 10m
BostonBrussels
BOS - BRU
BOSBRU
Boston Logan Intl
Wed 4/8
8:50 pm-12:55 pm
1 stop10h 05m
Brussels Bruxelles-National
Sun 4/12
1:50 pm-6:50 pm
1 stop11h 00m
BostonBrussels
BOS - BRU
BOSBRU
Boston Logan Intl
Sun 4/12
8:50 pm-12:55 pm
1 stop10h 05m
Brussels Bruxelles-National
Thu 4/16
1:50 pm-10:10 pm
1 stop14h 20m
BostonBrussels
BOS - BRU
BOSBRU
Boston Logan Intl
Sun 4/5
8:50 pm-12:55 pm
1 stop10h 05m
Brussels Bruxelles-National
Sat 4/18
1:50 pm-6:50 pm
1 stop11h 00m
BostonBrussels
BOS - BRU
BOSBRU
Boston Logan Intl
Sun 3/15
3:35 pm-1:15 pm
2 stops16h 40m
Brussels Bruxelles-National
Mon 3/23
3:45 pm-3:05 pm
1 stop28h 20m
Currently, February is the cheapest month in which you can book a flight from USA to Brussels (average of $312). Flying from USA to Brussels in June is currently the most expensive (average of $452). 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.
When flying from USA 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.
About 42% of weekly flights between United States and Brussels have experienced delays in the past year, with the average delay time being 201 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
Monday tends to have the lowest number of delays on this route, whereas Saturday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Air Europa have had the lowest number of delays on this route, with just 18% of flights being delayed.
Food
Entertainment
Crew
Overall
Boarding
Comfort
Reviews
Dane,Jan 2026
TYS - IAD
Food
Entertainment
Crew
Overall
Boarding
Comfort
Reviews
Dane,Jan 2026
TYS - IAD
Food
Entertainment
Crew
Overall
Boarding
Comfort
Reviews
Dane,Jan 2026
TYS - IAD
Food
Entertainment
Crew
Overall
Boarding
Comfort
Reviews
Dane,Jan 2026
TYS - IAD
Food
Entertainment
Crew
Overall
Boarding
Comfort
Reviews
Dane,Jan 2026
TYS - IAD
Food
Entertainment
Crew
Overall
Boarding
Comfort
Reviews
Dane,Jan 2026
TYS - IAD
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$256 | Average$588 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$317 | Average$580 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$333 | Average$798 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$334 | Average$785 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$345 | Average$741 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$352 | Average$499 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$362 | Average$884 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$386 | Average$738 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$397 | Average$712 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$397 | Average$848 | FlexibilityNo cancel fee | On-time67% |