$444+ Cheap flights from Chicago (CHI) to Bilbao (BIO)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BIO
Oct 9 — Oct 161
Round-trip
1 adult, Economy
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Find cheap flights from Chicago to Bilbao with Cheapflights
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Chicago to BilbaoExplore the most affordable flight options available from Chicago to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 9, 2026.
Explore the most affordable flight options available from Chicago to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 9, 2026.
This lol.travel deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/510:20 pm -
1 stop17h 55m
Wed 10/216:45 am -
1 stop14h 40m
Deal found 9/8![Finnair logo]()
$576
This Justfly.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/154:55 pm -
1 stop32h 35m
Tue 9/229:35 pm -
1 stop23h 50m
Deal found 9/8![British Airways logo]()
$643
This Expedia deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/59:02 am -
2 stops16h 28m
Wed 10/219:15 am -
1 stop12h 10m
Deal found 9/8![British Airways logo]()
$696
This Gotogate deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:25 am -
1 stop23h 00m
Tue 10/2711:55 am -
1 stop29h 05m
Deal found 9/5![Turkish Airlines logo]()
$704
This Finnair deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/153:50 pm -
2 stops24h 25m
Tue 9/229:35 pm -
1 stop25h 25m
Deal found 9/8![Multiple Airlines logo]()
$713
This Turkish Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:25 am -
1 stop23h 00m
Thu 10/295:15 pm -
1 stop23h 45m
Deal found 9/7![Turkish Airlines logo]()
$724
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/69:50 pm -
1 stop17h 05m
Thu 12/106:45 am -
1 stop13h 25m
Deal found 9/7![United Airlines logo]()
$728
This Mytrip deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:25 am -
2 stops18h 00m
Tue 10/277:00 am -
3 stops34h 00m
Deal found 9/5![Multiple Airlines logo]()
$745
This Mytrip deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/187:25 pm -
3 stops29h 50m
Sat 10/246:50 am -
2 stops18h 25m
Deal found 9/6![Multiple Airlines logo]()
$749
This Justfly.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2311:45 am -
1 stop16h 10m
Tue 12/111:55 am -
1 stop37h 25m
Deal found 9/7![Turkish Airlines logo]()
$754
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:27 pm -
2 stops14h 48m
Thu 10/297:10 am -
2 stops16h 50m
Deal found 9/4![Delta logo]()
$812
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/712:49 pm -
2 stops14h 01m
Wed 10/1410:30 am -
2 stops19h 03m
Deal found 9/7![Delta logo]()
$895
Best flights from Chicago to BilbaoDiscover carefully curated flight deals from Chicago to Bilbao that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
Discover carefully curated flight deals from Chicago to Bilbao that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
This Turkish Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:25 am -
1 stop23h 00m
Thu 10/295:15 pm -
1 stop23h 45m
Deal found 9/5![Turkish Airlines logo]()
$724
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:00 pm -
2 stops16h 30m
Thu 10/296:50 am -
1 stop14h 35m
Deal found 9/8![Delta logo]()
$791
This United Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/79:50 pm -
1 stop30h 10m
Thu 12/107:30 am -
1 stop17h 55m
Deal found 9/5![United Airlines logo]()
$809
This TAP AIR PORTUGAL deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/68:10 pm -
1 stop15h 25m
Thu 12/1012:10 pm -
1 stop34h 20m
Deal found 9/8![TAP AIR PORTUGAL logo]()
$818
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:27 pm -
2 stops14h 48m
Thu 10/297:10 am -
2 stops16h 50m
Deal found 9/4![Delta logo]()
$812
This Turkish Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/309:15 pm -
1 stop37h 00m
Sun 11/85:15 pm -
1 stop23h 45m
Deal found 9/4![Turkish Airlines logo]()
$824
This United Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/251:30 pm -
2 stops14h 30m
Tue 12/16:45 am -
2 stops16h 59m
Deal found 9/5![United Airlines logo]()
$832
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/29:50 pm -
1 stop18h 30m
Sat 1/96:45 am -
1 stop15h 35m
Deal found 9/7![United Airlines logo]()
$833
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/26:15 pm -
2 stops16h 10m
Sat 1/97:10 am -
2 stops22h 00m
Deal found 9/8![Delta logo]()
$853
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/153:35 pm -
1 stop19h 20m
Thu 10/226:50 am -
1 stop15h 05m
Deal found 9/7![United Airlines logo]()
$838
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/712:49 pm -
2 stops14h 01m
Wed 10/1410:30 am -
2 stops19h 03m
Deal found 9/7![Delta logo]()
$895
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:27 pm -
2 stops14h 48m
Tue 10/277:10 am -
2 stops21h 23m
Deal found 9/5![Delta logo]()
$900
This Delta deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/219:29 am -
2 stops18h 46m
Wed 10/287:10 am -
2 stops21h 23m
Deal found 9/6![Delta logo]()
$900
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:44 pm -
2 stops14h 46m
Tue 10/2010:30 am -
2 stops19h 03m
Deal found 9/5![Delta logo]()
$950
Last-minute flights from Chicago to BilbaoDiscover last-minute flight deals from Chicago to Bilbao. Data last updated September 9, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Bilbao. Data last updated September 9, 2026 and is based on user searches.
This Justfly.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/154:55 pm -
1 stop32h 35m
Tue 9/229:35 pm -
1 stop23h 50m
Deal found 9/8![British Airways logo]()
$643
This Finnair deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/153:50 pm -
2 stops24h 25m
Tue 9/229:35 pm -
1 stop25h 25m
Deal found 9/8![Multiple Airlines logo]()
$713
This lol.travel deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/510:20 pm -
1 stop17h 55m
Wed 10/216:45 am -
1 stop14h 40m
Deal found 9/8![Finnair logo]()
$576
This Expedia deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/59:02 am -
2 stops16h 28m
Wed 10/219:15 am -
1 stop12h 10m
Deal found 9/8![British Airways logo]()
$696
This Turkish Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/78:10 pm -
1 stop31h 55m
Wed 10/146:25 pm -
1 stop22h 15m
Deal found 9/7![Turkish Airlines logo]()
$773
This Turkish Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/88:10 pm -
1 stop32h 00m
Mon 10/2611:55 am -
1 stop29h 05m
Deal found 9/4![Turkish Airlines logo]()
$764
This Mytrip deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/187:25 pm -
3 stops29h 50m
Sat 10/246:50 am -
2 stops18h 25m
Deal found 9/6![Multiple Airlines logo]()
$749
This Gotogate deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:25 am -
1 stop23h 00m
Tue 10/2711:55 am -
1 stop29h 05m
Deal found 9/5![Turkish Airlines logo]()
$704
This Turkish Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:25 am -
1 stop23h 00m
Thu 10/295:15 pm -
1 stop23h 45m
Deal found 9/7![Turkish Airlines logo]()
$724
This Mytrip deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:25 am -
2 stops18h 00m
Tue 10/277:00 am -
3 stops34h 00m
Deal found 9/5![Multiple Airlines logo]()
$745
This Gotogate deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/209:40 pm -
1 stop13h 15m
Thu 10/296:45 am -
2 stops19h 13m
Deal found 9/6![Multiple Airlines logo]()
$777
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:27 pm -
2 stops14h 48m
Thu 10/297:10 am -
2 stops16h 50m
Deal found 9/4![Delta logo]()
$812
One-way flights from Chicago to BilbaoSearch for one-way flight options from Chicago to Bilbao. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
Search for one-way flight options from Chicago to Bilbao. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/112:20 pm -
1 stop12h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![SWISS logo]()
$444
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/193:50 pm -
2 stops47h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$463
This Delta deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1110:59 am -
2 stops15h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Delta logo]()
$468
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1110:24 am -
2 stops16h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Delta logo]()
$468
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/191:06 pm -
3 stops50h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$475
This Cheapflightsfares deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/199:00 pm -
1 stop13h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Aer Lingus logo]()
$475
This KAYAK deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:10 pm -
1 stop38h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Turkish Airlines logo]()
$637
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/219:40 pm -
1 stop13h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![United Airlines logo]()
$648
This Delta deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1911:35 am -
2 stops15h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Delta logo]()
$700
This BusinessClass deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected ” under the list of providers to see comparable flight deals.
Tue 11/2412:02 pm -
2 stops17h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![British Airways logo]()
$925
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/245:40 pm -
1 stop22h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$949
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/246:44 pm -
3 stops42h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$1,525
Find flight deals from Chicago to Bilbao
Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Bilbao (BIO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 9, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $686 (Mytrip) |
One-way from | $444 (Cheapflightsfares) |
Popular in | December |
Cheapest in | March |
Average price | $796 |
Cheapflights Fare Finder
Customize your flight search to find flights from Chicago to Bilbao that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 9, 2026.
Use the filters below to find and compare flights from Chicago to Bilbao that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
ChicagoBilbao
ORD Chicago O'Hare Intl - BIO Bilbao
ORDBIO
Chicago O'Hare Intl
Sun 10/11
2:20 pm-9:25 am
1 stop12h 05m
Bilbao
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$444
ChicagoBilbao
MDW Chicago Midway - BIO Bilbao
MDWBIO
Chicago Midway
Sun 10/11
12:49 pm-9:50 am
2 stops14h 01m
Bilbao
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$468
ChicagoBilbao
MDW Chicago Midway - BIO Bilbao
MDWBIO
Chicago Midway
Sun 10/11
10:59 am-9:50 am
2 stops15h 51m
Bilbao
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$468
ChicagoBilbao
ORD Chicago O'Hare Intl - BIO Bilbao
ORDBIO
Chicago O'Hare Intl
Sun 10/11
10:24 am-9:50 am
2 stops16h 26m
Bilbao
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$468
ChicagoBilbao
ORD Chicago O'Hare Intl - BIO Bilbao
ORDBIO
Chicago O'Hare Intl
Sat 9/19
4:35 pm-10:40 pm
3 stops47h 05m
Bilbao
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$471
ChicagoBilbao
MDW Chicago Midway - BIO Bilbao
MDWBIO
Chicago Midway
Sat 9/19
1:06 pm-10:40 pm
3 stops50h 34m
Bilbao
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$475
ChicagoBilbao
ORD Chicago O'Hare Intl - BIO Bilbao
ORDBIO
Chicago O'Hare Intl
Mon 9/21
9:39 pm-10:45 am
2 stops30h 06m
Bilbao
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$651
ChicagoBilbao
MDW Chicago Midway - BIO Bilbao
MDWBIO
Chicago Midway
Sat 9/19
11:35 am-9:50 am
2 stops15h 15m
Bilbao
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$700
ChicagoBilbao
ORD Chicago O'Hare Intl - BIO Bilbao
ORDBIO
Chicago O'Hare Intl
Tue 10/20
11:25 am-5:25 pm
1 stop23h 00m
Bilbao
Thu 10/29
5:15 pm-11:00 am
1 stop23h 45m
$724
ChicagoBilbao
ORD Chicago O'Hare Intl - BIO Bilbao
ORDBIO
Chicago O'Hare Intl
Tue 10/20
6:00 pm-5:30 pm
2 stops16h 30m
Bilbao
Thu 10/29
6:50 am-3:25 pm
1 stop14h 35m
$791
Showing 1-10 of 24 resultsSorted by cheapest first
Compare providers for flights from Chicago to Bilbao
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Chicago to Bilbao in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Chicago-Bilbao flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Chicago-Bilbao flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Chicago-Bilbao flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago-Bilbao flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago-Bilbao flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Chicago to Bilbao
Have a flexible travel schedule? Discover the best time to fly to Bilbao from Chicago with our price prediction graph.
CHI-BIO
ORD-BIO
MDW-BIO
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Chicago to Bilbao
CHI-BIO
ORD-BIO
MDW-BIO
What is the cheapest month to book a flight from Chicago to Bilbao?
Currently, March is the cheapest month in which you can book a flight from Chicago to Bilbao (average of $640). Flying from Chicago to Bilbao in July is currently the most expensive (average of $1,291). 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.
Related info for your journey
Find useful and relevant information for your journey from Chicago to Bilbao. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Chicago and Bilbao flights
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Top 2 airlines flying from Chicago to Bilbao
Discover the top 2 airlines that operate flights from Chicago to Bilbao. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$584 | Average$992 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$699 | Average$925 | FlexibilityNo cancel fee | On-time69% |