Chicago (ORD) to Bilbao (BIO) flights from USD692

*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 Chicago and Bilbao

cmp-daily-histogram-bars-legend-min-price-aria-label USD692
cmp-daily-histogram-bars-legend-max-price-aria-label USD1.1K
Displaying fares for September-2026
  • ORD–BIO, 09/11/2026 – 09/18/2026: From USD989
    11

    Fr

    SEP

  • ORD–BIO, 09/12/2026 – 09/19/2026: From USD1,038
    12

    Sa

  • ORD–BIO, 09/13/2026 – 10/11/2026: From USD1,023
    13

    Su

  • ORD–BIO, 09/14/2026 – 10/05/2026: From USD978
    14

    Mo

  • ORD–BIO, 09/15/2026 – 10/13/2026: From USD924
    15

    Tu

  • ORD–BIO, 09/16/2026 – 09/23/2026: From USD1,098
    16

    We

  • ORD–BIO, 09/17/2026 – 09/24/2026: From USD1,013
    17

    Th

  • ORD–BIO, 09/18/2026 – 10/02/2026: From USD746
    18

    Fr

  • ORD–BIO, 09/19/2026 – 10/03/2026: From USD803
    19

    Sa

  • ORD–BIO, 09/20/2026 – 10/11/2026: From USD890
    20

    Su

  • ORD–BIO, 09/21/2026 – 10/12/2026: From USD746
    21

    Mo

  • ORD–BIO, 09/22/2026 – 10/06/2026: From USD692
    22

    Tu

  • ORD–BIO, 09/23/2026 – 09/30/2026: From USD922
    23

    We

  • ORD–BIO, 09/24/2026 – 10/15/2026: From USD846
    24

    Th

  • ORD–BIO, 09/25/2026 – 10/02/2026: From USD846
    25

    Fr

  • ORD–BIO, 09/26/2026 – 10/03/2026: From USD803
    26

    Sa

  • ORD–BIO, 09/27/2026 – 10/25/2026: From USD831
    27

    Su

  • ORD–BIO, 09/28/2026 – 10/12/2026: From USD746
    28

    Mo

  • ORD–BIO, 09/29/2026 – 10/13/2026: From USD696
    29

    Tu

  • ORD–BIO, 09/30/2026 – 10/14/2026: From USD822
    30

    We

  • ORD–BIO, 10/01/2026 – 10/29/2026: From USD939
    01

    Th

    OCT

  • ORD–BIO, 10/02/2026 – 10/23/2026: From USD943
    02

    Fr

  • ORD–BIO, 10/03/2026 – 10/31/2026: From USD994
    03

    Sa

  • ORD–BIO, 10/04/2026 – 10/25/2026: From USD946
    04

    Su

  • ORD–BIO, 10/05/2026 – 10/12/2026: From USD943
    05

    Mo

  • ORD–BIO, 10/06/2026 – 10/13/2026: From USD889
    06

    Tu

  • ORD–BIO, 10/07/2026 – 10/14/2026: From USD894
    07

    We

  • ORD–BIO, 10/08/2026 – 10/15/2026: From USD842
    08

    Th

  • ORD–BIO, 10/09/2026 – 11/06/2026: From USD969
    09

    Fr

  • ORD–BIO, 10/10/2026 – 11/07/2026: From USD881
    10

    Sa

  • RangeUSD692-USD1,098