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Flights from Chicago to Bilbao

Find flight deals from Chicago to Bilbao for the next 3 months. Book one way flights from $479 or round trip flights from $889.

      • ORD 6:00 PM
        22h 25m
        1 stop
        BIO 11:25 PM
        Chicago - Bilbao | Sun, May 31 | United Airlines
        BIO 6:50 AM
        13h 5m
        1 stop
        ORD 12:55 PM
        Bilbao - Chicago | Mon, Jun 8 | Lufthansa
        $889 $1,047
        15% off
        15% off
        $1,047 $889
      • ORD 9:40 PM
        18h 45m
        1 stop
        BIO 11:25 PM
        Chicago - Bilbao | Tue, May 19 | Lufthansa
        BIO 6:45 AM
        15h 10m
        1 stop
        ORD 2:55 PM
        Bilbao - Chicago | Wed, May 27 | Lufthansa
        $896 $1,047
        14% off
        14% off
        $1,047 $896
      • ORD 5:10 PM
        21h 50m
        1 stop
        BIO 10:00 PM
        Chicago - Bilbao | Sun, Jul 12 | Air France
        BIO 5:15 PM
        28h 15m
        1 stop
        ORD 2:30 PM
        Bilbao - Chicago | Sun, Jul 19 | KLM
        $931 $1,047
        11% off
        11% off
        $1,047 $931
      • ORD 5:10 PM
        21h 50m
        1 stop
        BIO 10:00 PM
        Chicago - Bilbao | Mon, Jul 13 | Air France
        BIO 5:15 PM
        28h
        1 stop
        ORD 2:15 PM
        Bilbao - Chicago | Mon, Jul 20 | KLM
        $931
        11% off
        $1,047 $931
      • ORD 10:30 PM
        17h 45m
        1 stop
        BIO 11:15 PM
        Chicago - Bilbao | Mon, Jun 1 | Finnair
        BIO 6:45 AM
        16h 15m
        1 stop
        ORD 4:00 PM
        Bilbao - Chicago | Tue, Jun 9 | Finnair
        $939
        10% off
        $1,047 $939
      • ORD 10:30 PM
        17h 45m
        1 stop
        BIO 11:15 PM
        Chicago - Bilbao | Sun, May 31 | Iberia
        BIO 9:35 PM
        25h 25m
        1 stop
        ORD 4:00 PM
        Bilbao - Chicago | Mon, Jun 8 | Iberia
        $945
        10% off
        $1,047 $945
      • ORD 4:55 PM
        17h
        1 stop
        BIO 4:55 PM
        Chicago - Bilbao | Sat, Jul 11 | British Airways
        BIO 9:35 PM
        25h 25m
        1 stop
        ORD 4:00 PM
        Bilbao - Chicago | Sat, Jul 18 | British Airways
        $950
        9% off
        $1,047 $950
      • ORD 4:55 PM
        17h
        1 stop
        BIO 4:55 PM
        Chicago - Bilbao | Mon, Jul 13 | British Airways
        BIO 9:35 PM
        25h 25m
        1 stop
        ORD 4:00 PM
        Bilbao - Chicago | Mon, Jul 20 | British Airways
        $950
        9% off
        $1,047 $950
      • ORD 10:30 PM
        17h 45m
        1 stop
        BIO 11:15 PM
        Chicago - Bilbao | Sun, May 31 | Finnair
        BIO 9:35 PM
        25h 25m
        1 stop
        ORD 4:00 PM
        Bilbao - Chicago | Mon, Jun 8 | Iberia
        $951
        9% off
        $1,047 $951
      • ORD 10:30 PM
        17h 45m
        1 stop
        BIO 11:15 PM
        Chicago - Bilbao | Sat, Jul 11 | Finnair
        BIO 9:35 PM
        25h 25m
        1 stop
        ORD 4:00 PM
        Bilbao - Chicago | Sat, Jul 18 | Iberia
        $952
        9% off
        $1,047 $952
      • CHI 1:00 PM
        17h 25m
        1 stop
        BIO 2:00 PM
        Chicago - Bilbao | Wed, May 20 | Normal Airline
        BIO 3:00 PM
        6h
        Nonstop
        CHI 4:00 PM
        Bilbao - Chicago | Fri, May 22 | Normal Airline
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        Find more flights
      • ORD 4:55 PM
        12h 50m
        1 stop
        BIO 12:45 PM
        Chicago - Bilbao | Sun, Jun 14 | Iberia
        $479 $625
        23% off
        23% off
        $625 $479
      • ORD 10:30 PM
        17h 45m
        1 stop
        BIO 11:15 PM
        Chicago - Bilbao | Mon, Jun 15 | Iberia
        $479 $625
        23% off
        23% off
        $625 $479
      • ORD 3:45 PM
        18h 40m
        1 stop
        BIO 5:25 PM
        Chicago - Bilbao | Mon, Jun 15 | Aer Lingus
        $525 $625
        16% off
        16% off
        $625 $525
      • ORD 9:00 PM
        13h 25m
        1 stop
        BIO 5:25 PM
        Chicago - Bilbao | Mon, Jun 1 | Aer Lingus
        $525
        16% off
        $625 $525
      • ORD 9:00 PM
        13h 25m
        1 stop
        BIO 5:25 PM
        Chicago - Bilbao | Mon, May 25 | Aer Lingus
        $527
        16% off
        $625 $527
      • ORD 9:00 PM
        13h 25m
        1 stop
        BIO 5:25 PM
        Chicago - Bilbao | Sun, Jun 14 | Aer Lingus
        $541
        13% off
        $625 $541
      • ORD 9:00 PM
        13h 30m
        1 stop
        BIO 5:30 PM
        Chicago - Bilbao | Wed, Jun 17 | Aer Lingus
        $553
        12% off
        $625 $553
      • ORD 4:45 PM
        11h 45m
        1 stop
        BIO 11:30 AM
        Chicago - Bilbao | Thu, Jul 9 | TAP Air Portugal
        $565
        10% off
        $625 $565
      • ORD 9:00 PM
        13h 25m
        1 stop
        BIO 5:25 PM
        Chicago - Bilbao | Mon, Jun 15 | American Airlines
        $565
        10% off
        $625 $565
      • ORD 4:55 PM
        16h
        1 stop
        BIO 3:55 PM
        Chicago - Bilbao | Mon, Jun 1 | American Airlines
        $568
        9% off
        $625 $568
      • CHI 1:00 PM
        17h 25m
        1 stop
        BIO 2:00 PM
        Chicago - Bilbao | Wed, May 20 | Normal Airline
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Displayed flight fares from Chicago to Bilbao are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Frequently Asked Questions

  • What are the cheapest flights from Chicago to Bilbao (CHI-BIO)?

    Based on Trip.com data, Iberia offers one-way fares as low as $479 on Cheapest nonstop routes (e.g. ORD to BIO on Sun, Jun 14), while United Airlines offers Cheapest nonstop round-trips from $889 departing on Sun, May 31 and returning on Mon, Jun 8.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Chicago to Bilbao is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Chicago to Bilbao, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sun, Jun 14, with one-way flights priced at just $479.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Iberia.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Bilbao travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Chicago to Bilbao is October, when demand for travel is lower.
  • After crunching the numbers on our May flight calendar, it's currently cheapest to fly from Chicago to Bilbao on May 26, 2026 with United Airlines, with prices starting at $889.
  • The time difference between Bilbao and Chicago is 7h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

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Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.