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Cheap flights from Illinois to San Sebastian from $368

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to San Sebastian departing on 9/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Illinois to San Sebastian

Cheap round-trip flights

Enter your travel dates to find the best prices.
Iberia Logo
4:45 pm - 8:40 amORD  Chicago O'Hare Intl-EAS San Sebastián
32h 55m2 stops Charlotte Douglas Madrid Barajas
Iberia Logo
9:20 am - 2:55 pmEAS  San Sebastián-ORD Chicago O'Hare Intl
12h 35m1 stop Madrid Barajas
$815Iberia
Sat, Nov 14 - Wed, Nov 18
Finnair Logo
5:40 pm - 1:00 pmORD  Chicago O'Hare Intl-EAS San Sebastián
12h 20m1 stop Madrid Barajas
Finnair Logo
9:20 am - 3:10 pmEAS  San Sebastián-ORD Chicago O'Hare Intl
12h 50m1 stop Madrid Barajas
$848Finnair
Sat, Nov 14 - Wed, Nov 18
Finnair Logo
4:55 pm - 1:00 pmORD  Chicago O'Hare Intl-EAS San Sebastián
13h 05m1 stop Madrid Barajas
Finnair Logo
9:20 am - 4:00 pmEAS  San Sebastián-ORD Chicago O'Hare Intl
13h 40m1 stop Madrid Barajas
$862Finnair
Mon, Oct 5 - Tue, Oct 20
Finnair Logo
4:55 pm - 1:00 pmORD  Chicago O'Hare Intl-EAS San Sebastián
13h 05m1 stop Madrid Barajas
Finnair Logo
9:20 am - 7:55 pmEAS  San Sebastián-ORD Chicago O'Hare Intl
17h 35m2 stops Madrid Barajas Miami
$866Finnair
Mon, Oct 5 - Tue, Oct 20
Iberia Logo
5:10 pm - 8:50 pmORD  Chicago O'Hare Intl-EAS San Sebastián
20h 40m2 stops London Heathrow Madrid Barajas
Iberia Logo
1:40 pm - 2:55 pmEAS  San Sebastián-ORD Chicago O'Hare Intl
32h 15m1 stop Madrid Barajas
$867Iberia
Fri, Jan 15 - Tue, Jan 19
British Airways Logo
9:11 pm - 8:50 pmORD  Chicago O'Hare Intl-EAS San Sebastián
40h 39m2 stops Philadelphia Madrid Barajas
British Airways Logo
9:30 pm - 2:13 pmEAS  San Sebastián-ORD Chicago O'Hare Intl
23h 43m2 stops Madrid Barajas Dallas/Fort Worth
$876British Airways
Sat, Nov 14 - Wed, Nov 18
Iberia Logo
9:50 pm - 8:50 pmORD  Chicago O'Hare Intl-EAS San Sebastián
16h 00m2 stops London Heathrow Madrid Barajas
Iberia Logo
9:30 pm - 1:45 pmEAS  San Sebastián-ORD Chicago O'Hare Intl
23h 15m2 stops Madrid Barajas London Heathrow
$877Iberia
Fri, Jan 15 - Tue, Jan 19
Finnair Logo
12:59 pm - 1:00 pmORD  Chicago O'Hare Intl-EAS San Sebastián
17h 01m2 stops Dallas/Fort Worth Madrid Barajas
Finnair Logo
9:20 am - 8:12 pmEAS  San Sebastián-ORD Chicago O'Hare Intl
17h 52m2 stops Madrid Barajas Boston Logan Intl
$879Finnair
Mon, Oct 5 - Tue, Oct 20
Multiple Airlines Logo
10:15 pm - 8:50 pmORD  Chicago O'Hare Intl-EAS San Sebastián
15h 35m1 stop Madrid Barajas
Multiple Airlines Logo
9:30 pm - 4:00 pmEAS  San Sebastián-ORD Chicago O'Hare Intl
25h 30m1 stop Madrid Barajas
$879Multiple Airlines
Mon, Sep 28 - Mon, Oct 5
Multiple Airlines Logo
5:00 pm - 8:50 pmORD  Chicago O'Hare Intl-EAS San Sebastián
20h 50m2 stops London Heathrow Madrid Barajas
Multiple Airlines Logo
9:30 pm - 4:00 pmEAS  San Sebastián-ORD Chicago O'Hare Intl
25h 30m1 stop Madrid Barajas
$882Multiple Airlines
Mon, Sep 28 - Mon, Oct 5

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Iberia flights from Illinois to San Sebastian

Our best Iberia deals on Illinois to San Sebastian flight tickets
Iberia
Nov 14
ORD4:45 pmChicago O'Hare Intl
32h 55m
2 stops
EAS8:40 amSan Sebastián
Nov 18
EAS9:20 amSan Sebastián
12h 35m
1 stop
ORD2:55 pmChicago O'Hare Intl
$815
Iberia
Jan 15
ORD5:10 pmChicago O'Hare Intl
20h 40m
2 stops
EAS8:50 pmSan Sebastián
Jan 19
EAS1:40 pmSan Sebastián
32h 15m
1 stop
ORD2:55 pmChicago O'Hare Intl
$867
Iberia
Jan 15
ORD9:50 pmChicago O'Hare Intl
16h 00m
2 stops
EAS8:50 pmSan Sebastián
Jan 19
EAS9:30 pmSan Sebastián
23h 15m
2 stops
ORD1:45 pmChicago O'Hare Intl
$877

British Airways flights from Illinois to San Sebastian

Our best British Airways deals on Illinois to San Sebastian flight tickets
British Airways
Nov 14
ORD9:11 pmChicago O'Hare Intl
40h 39m
2 stops
EAS8:50 pmSan Sebastián
Nov 18
EAS9:30 pmSan Sebastián
23h 43m
2 stops
ORD2:13 pmChicago O'Hare Intl
$876
British Airways
Sep 28
ORD4:55 pmChicago O'Hare Intl
20h 55m
1 stop
EAS8:50 pmSan Sebastián
Oct 5
EAS9:30 pmSan Sebastián
25h 30m
1 stop
ORD4:00 pmChicago O'Hare Intl
$894
British Airways
Sep 14
ORD11:50 amChicago O'Hare Intl
18h 10m
2 stops
EAS1:00 pmSan Sebastián
Sep 21
EAS9:30 pmSan Sebastián
25h 30m
1 stop
ORD4:00 pmChicago O'Hare Intl
$903

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to San Sebastian 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, momondo users made 832,500 searches. Data last updated August 16, 2026.
Use the filters below to find and compare flights from Illinois to San Sebastian that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSan Sebastian

ORD Chicago O'Hare Intl - EAS San Sebastián

ORDEAS

Chicago O'Hare Intl

Sat 11/14

4:45 pm-8:40 am

2 stops32h 55m

San Sebastián

Wed 11/18

9:20 am-2:55 pm

1 stop12h 35m

$815
Quickest round-trip

ChicagoSan Sebastian

ORD Chicago O'Hare Intl - EAS San Sebastián

ORDEAS

Chicago O'Hare Intl

Sat 11/14

5:40 pm-1:00 pm

1 stop12h 20m

San Sebastián

Wed 11/18

9:20 am-3:10 pm

1 stop12h 50m

$848

ChicagoSan Sebastian

ORD Chicago O'Hare Intl - EAS San Sebastián

ORDEAS

Chicago O'Hare Intl

Mon 10/5

4:55 pm-1:00 pm

1 stop13h 05m

San Sebastián

Tue 10/20

9:20 am-4:00 pm

1 stop13h 40m

$862

ChicagoSan Sebastian

ORD Chicago O'Hare Intl - EAS San Sebastián

ORDEAS

Chicago O'Hare Intl

Mon 10/5

4:55 pm-1:00 pm

1 stop13h 05m

San Sebastián

Tue 10/20

9:20 am-7:55 pm

2 stops17h 35m

$866

ChicagoSan Sebastian

ORD Chicago O'Hare Intl - EAS San Sebastián

ORDEAS

Chicago O'Hare Intl

Fri 1/15

5:10 pm-8:50 pm

2 stops20h 40m

San Sebastián

Tue 1/19

1:40 pm-2:55 pm

1 stop32h 15m

$867

ChicagoSan Sebastian

ORD Chicago O'Hare Intl - EAS San Sebastián

ORDEAS

Chicago O'Hare Intl

Sat 11/14

9:11 pm-8:50 pm

2 stops40h 39m

San Sebastián

Wed 11/18

9:30 pm-2:13 pm

2 stops23h 43m

$876

ChicagoSan Sebastian

ORD Chicago O'Hare Intl - EAS San Sebastián

ORDEAS

Chicago O'Hare Intl

Fri 1/15

9:50 pm-8:50 pm

2 stops16h 00m

San Sebastián

Tue 1/19

9:30 pm-1:45 pm

2 stops23h 15m

$877

ChicagoSan Sebastian

ORD Chicago O'Hare Intl - EAS San Sebastián

ORDEAS

Chicago O'Hare Intl

Mon 10/5

12:59 pm-1:00 pm

2 stops17h 01m

San Sebastián

Tue 10/20

9:20 am-8:12 pm

2 stops17h 52m

$879

ChicagoSan Sebastian

ORD Chicago O'Hare Intl - EAS San Sebastián

ORDEAS

Chicago O'Hare Intl

Mon 9/28

10:15 pm-8:50 pm

1 stop15h 35m

San Sebastián

Mon 10/5

9:30 pm-4:00 pm

1 stop25h 30m

$879

ChicagoSan Sebastian

ORD Chicago O'Hare Intl - EAS San Sebastián

ORDEAS

Chicago O'Hare Intl

Mon 9/28

5:00 pm-8:50 pm

2 stops20h 50m

San Sebastián

Mon 10/5

9:30 pm-4:00 pm

1 stop25h 30m

$882

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Sebastian from

How to get the cheapest flight ticket from Illinois to San Sebastian

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Illinois to San Sebastián?

Iberia is the most popular carrier operating from Illinois to San Sebastián

Cheap Illinois to San Sebastian flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to San Sebastian

Fastest flight time

15h 35m

Direct flights

None
The fastest flight from Illinois to San Sebastian takes 15h 35m
There are no direct flights from Illinois to San Sebastian. There are no popular flight routes from Illinois to San Sebastian.
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Frequently asked questions about flying from Illinois to San Sebastian

  • When did momondo last update prices for flights from Illinois to San Sebastián Airport?

    Prices for flights from Illinois to San Sebastián Airport were last updated today.

  • How old do you have to be to fly from Illinois to San Sebastián Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to San Sebastián Airport.

  • What documentation or ID do you need to fly to San Sebastián Airport?

    The required travel and health documents for your San Sebastián Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Sebastián Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near San Sebastian?

Book flights to San Sebastian if you plan to visit one of these locations
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Why use momondo?

Why should I use momondo to find a flight deal from Illinois to San Sebastian?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to San Sebastian for you.

Can I find flights from Illinois to San Sebastian with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to San Sebastian from Illinois with this policy.

How can momondo help me find flights from Illinois to San Sebastian?

momondo provides multiple filters to help you find the best flight to San Sebastian from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Illinois to San Sebastian right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Illinois to San Sebastian flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Airports servicing Basque Country

Bilbao Airport