United's Polaris Business Class includes lie-flat seats, Saks bedding, and upscale amenity kits.
United's Premium Plus offers extra legroom, upgraded meals, and two checked bags on international flights.

Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $332 (Kiwi.com) |
One-way from | $174 (Kiwi.com) |
Popular in | December |
Cheapest in | November |
Average price | $778 |
Good round-trip deal | $724 or less |
Fly from
Fly to
Route
Depart
Return
Price
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Wed 3/4
3:35 pm-6:05 pm
2 stops20h 30m
Bilbao
Wed 3/11
7:25 am-7:35 pm
1 stop17h 10m
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Tue 3/3
4:45 pm-8:30 am
1 stop9h 45m
Bilbao
Thu 3/19
6:45 am-4:15 pm
1 stop14h 30m
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Wed 3/4
8:40 pm-6:05 pm
1 stop15h 25m
Bilbao
Thu 3/12
11:35 am-7:35 pm
1 stop13h 00m
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Wed 2/25
4:45 pm-4:55 pm
1 stop18h 10m
Bilbao
Wed 3/4
6:45 am-10:48 pm
2 stops22h 03m
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Mon 3/2
2:20 pm-10:50 am
2 stops14h 30m
Bilbao
Tue 3/17
11:35 am-7:35 pm
1 stop13h 00m
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Tue 3/3
6:30 pm-11:30 am
1 stop11h 00m
Bilbao
Tue 3/17
7:25 am-5:20 pm
1 stop14h 55m
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Sun 3/1
6:30 pm-11:30 am
1 stop11h 00m
Bilbao
Wed 3/18
7:25 am-5:20 pm
1 stop14h 55m
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Wed 2/25
12:05 pm-10:50 am
2 stops16h 45m
Bilbao
Wed 3/4
11:35 am-6:35 pm
1 stop13h 00m
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Wed 3/18
9:40 pm-9:55 pm
1 stop19h 15m
Bilbao
Mon 3/23
6:50 pm-7:35 pm
1 stop29h 45m
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Tue 3/10
9:40 pm-9:55 pm
1 stop19h 15m
Bilbao
Mon 3/16
6:50 pm-7:35 pm
1 stop29h 45m
Currently, October is the cheapest month in which you can book a flight from USA to Bilbao (average of $361). Flying from USA to Bilbao in June is currently the most expensive (average of $534). 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.
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$391 | Average$925 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$393 | Average$948 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$424 | Average$893 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$427 | Average$770 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$427 | Average$807 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$439 | Average$831 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$447 | Average$723 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$453 | Average$803 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$470 | Average$822 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$470 | Average$804 | FlexibilityNo cancel fee | On-time75% |