San Francisco (SFO) to Bilbao (BIO) flights from USD750

*Modifying this information may result in a different fare

*All amounts are in USD. Taxes and surcharges are included. No booking fee is applicable. Fares displayed have been collected within the last 48hrs and may no longer be available at time of booking. Additional baggage fees may apply.

Why book directly on the KLM website?

Explore the benefits of booking through our website.

No hidden costs icon

No hidden costs

Book with confidence. Our rates hide no unpleasant surprises.

24/7 customer service icon

24/7 customer service

Count on direct, personal support whenever you need it, day or night.

Seamless travel icon

Seamless travel

Enjoy a smooth journey with timely updates and automatic rebooking.

Lowest fares between San Francisco and Bilbao

cmp-daily-histogram-bars-legend-min-price-aria-label USD866
cmp-daily-histogram-bars-legend-max-price-aria-label USD1.2K
Displaying fares for August-2026
  • SFO–BIO, 08/15/2026 – 09/05/2026: From USD988
    15

    Sa

    AUG

  • SFO–BIO, 08/16/2026 – 09/06/2026: From USD938
    16

    Su

  • SFO–BIO, 08/17/2026 – 08/31/2026: From USD983
    17

    Mo

  • SFO–BIO, 08/18/2026 – 09/08/2026: From USD900
    18

    Tu

  • SFO–BIO, 08/19/2026 – 09/09/2026: From USD888
    19

    We

  • SFO–BIO, 08/20/2026 – 09/10/2026: From USD988
    20

    Th

  • SFO–BIO, 08/21/2026 – 09/11/2026: From USD983
    21

    Fr

  • SFO–BIO, 08/22/2026 – 09/05/2026: From USD1,033
    22

    Sa

  • SFO–BIO, 08/23/2026 – 09/06/2026: From USD973
    23

    Su

  • SFO–BIO, 08/24/2026 – 09/21/2026: From USD991
    24

    Mo

  • SFO–BIO, 08/25/2026 – 09/22/2026: From USD935
    25

    Tu

  • SFO–BIO, 08/26/2026 – 09/09/2026: From USD1,030
    26

    We

  • SFO–BIO, 08/27/2026 – 09/17/2026: From USD1,131
    27

    Th

  • SFO–BIO, 08/28/2026 – 09/11/2026: From USD1,100
    28

    Fr

  • SFO–BIO, 08/29/2026 – 09/05/2026: From USD1,233
    29

    Sa

  • SFO–BIO, 08/30/2026 – 09/06/2026: From USD1,080
    30

    Su

  • SFO–BIO, 08/31/2026 – 09/28/2026: From USD1,080
    31

    Mo

  • SFO–BIO, 09/01/2026 – 09/22/2026: From USD1,012
    01

    Tu

    SEP

  • SFO–BIO, 09/02/2026 – 09/09/2026: From USD1,082
    02

    We

  • SFO–BIO, 09/03/2026 – 10/01/2026: From USD1,174
    03

    Th

  • SFO–BIO, 09/04/2026 – 09/18/2026: From USD1,210
    04

    Fr

  • SFO–BIO, 09/05/2026 – 10/03/2026: From USD1,086
    05

    Sa

  • SFO–BIO, 09/06/2026 – 10/04/2026: From USD1,029
    06

    Su

  • SFO–BIO, 09/07/2026 – 09/28/2026: From USD1,105
    07

    Mo

  • SFO–BIO, 09/08/2026 – 09/22/2026: From USD994
    08

    Tu

  • SFO–BIO, 09/09/2026 – 09/30/2026: From USD932
    09

    We

  • SFO–BIO, 09/10/2026 – 09/24/2026: From USD983
    10

    Th

  • SFO–BIO, 09/11/2026 – 09/18/2026: From USD886
    11

    Fr

  • SFO–BIO, 09/12/2026 – 10/03/2026: From USD931
    12

    Sa

  • SFO–BIO, 09/13/2026 – 10/11/2026: From USD873
    13

    Su

  • SFO–BIO, 09/14/2026 – 10/12/2026: From USD866
    14

    Mo

  • RangeUSD866-USD1,233