Philadelphia (PHL) to Bilbao (BIO) flight deal in economy from $351

AAAmerican Airlines

One Way•Economy

PHL

Philadelphia International Airport

Philadelphia, United States

BIO

Bilbao Airport

Bilbao, Spain

$652 USD

-46%$351 USD

Verified 13 days ago

December 2026

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

30$3511$6502$6543$1,3764$9945$4056$9157$1,2768$6549$65410$1,09811$72212$40513$65014$81315$70916$70917$1,43618$1,10219$95220$1,03221$87822$87823$87824$40125$93726$70427$65028$35529$65430$65031$4011$9942$7043$650

Fair Availability

22% of dates checked are available within 10% of the lowest price

Wednesday, December 2nd, 2026

Outbound Flights

15h 30m·2 stops

$654 USD

PHLDec 2 11:00

→

BOSDec 2 12:21

AA 2615Boeing 737

4h 39m layover

BOSDec 2 17:00

→

MADDec 3 06:00

IB 348Airbus A321neo

1h 25m layover

MADDec 3 07:25

→

BIODec 3 08:30

IB 429Airbus A320

15h 5m·1 stop

$1,276 USD

PHLDec 2 19:50

→

MADDec 3 08:55

AA 740Boeing 787

6h 55m layover

MADDec 3 15:50

→

BIODec 3 16:55

IB 435Airbus A319

Google Flights