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Cheap flights from Chicago to San Sebastian from $665

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to San Sebastian departing on 9/21. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago to San Sebastian

Cheap round-trip flights

Enter your travel dates to find the best prices.
Iberia Logo
10:35 pm - 8:40 am
ORD
-
EAS
27h 05m
2 stops
Iberia Logo
9:20 am - 2:25 pm
EAS
-
ORD
12h 05m
1 stop
$861Iberia
Wed, Oct 14 - Fri, Oct 23
Iberia Logo
10:20 pm - 8:40 am
ORD
-
EAS
27h 20m
1 stop
Iberia Logo
9:20 am - 2:25 pm
EAS
-
ORD
12h 05m
1 stop
$867Iberia
Wed, Oct 14 - Fri, Oct 23
Iberia Logo
10:34 am - 8:40 am
ORD
-
EAS
15h 06m
2 stops
Iberia Logo
9:20 am - 9:00 pm
EAS
-
ORD
18h 40m
2 stops
$873Iberia
Wed, Oct 7 - Fri, Oct 16
Iberia Logo
5:55 pm - 8:50 pm
ORD
-
EAS
19h 55m
2 stops
Iberia Logo
9:30 pm - 2:25 pm
EAS
-
ORD
23h 55m
1 stop
$873Iberia
Tue, Oct 13 - Tue, Oct 20
Iberia Logo
10:20 pm - 8:40 am
ORD
-
EAS
27h 20m
1 stop
Iberia Logo
9:20 am - 9:00 pm
EAS
-
ORD
18h 40m
2 stops
$877Iberia
Wed, Oct 7 - Fri, Oct 16
Iberia Logo
10:20 pm - 8:40 am
ORD
-
EAS
27h 20m
1 stop
Iberia Logo
9:30 pm - 2:25 pm
EAS
-
ORD
23h 55m
1 stop
$878Iberia
Tue, Oct 13 - Tue, Oct 20
Iberia Logo
5:55 pm - 8:50 pm
ORD
-
EAS
19h 55m
2 stops
Iberia Logo
9:30 pm - 1:50 pm
EAS
-
ORD
23h 20m
2 stops
$883Iberia
Tue, Oct 13 - Tue, Oct 20
Multiple Airlines Logo
10:15 pm - 8:50 pm
ORD
-
EAS
15h 35m
1 stop
Multiple Airlines Logo
9:30 pm - 4:00 pm
EAS
-
ORD
25h 30m
1 stop
$896Multiple Airlines
Mon, Sep 28 - Mon, Oct 5
American Airlines Logo
6:49 am - 8:40 am
ORD
-
EAS
18h 51m
2 stops
American Airlines Logo
9:20 am - 2:25 pm
EAS
-
ORD
12h 05m
1 stop
$919American Airlines
Tue, Sep 8 - Tue, Sep 15
American Airlines Logo
10:25 pm - 8:40 am
ORD
-
EAS
27h 15m
1 stop
American Airlines Logo
9:20 am - 2:25 pm
EAS
-
ORD
12h 05m
1 stop
$924American Airlines
Tue, Sep 8 - Tue, Sep 15

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Iberia flights from Chicago to San Sebastian

Our best Iberia deals on Chicago to San Sebastian flight tickets
Iberia
Oct 14
ORD10:35 pmChicago O'Hare Intl
27h 05m
2 stops
EAS8:40 amSan Sebastián
Oct 23
EAS9:20 amSan Sebastián
12h 05m
1 stop
ORD2:25 pmChicago O'Hare Intl
$861
Iberia
Oct 14
ORD10:20 pmChicago O'Hare Intl
27h 20m
1 stop
EAS8:40 amSan Sebastián
Oct 23
EAS9:20 amSan Sebastián
12h 05m
1 stop
ORD2:25 pmChicago O'Hare Intl
$867
Iberia
Oct 7
ORD10:34 amChicago O'Hare Intl
15h 06m
2 stops
EAS8:40 amSan Sebastián
Oct 16
EAS9:20 amSan Sebastián
18h 40m
2 stops
ORD9:00 pmChicago O'Hare Intl
$873

British Airways flights from Chicago to San Sebastian

Our best British Airways deals on Chicago to San Sebastian flight tickets
British Airways
Sep 14
ORD4:55 pmChicago O'Hare Intl
13h 05m
1 stop
EAS1:00 pmSan Sebastián
Sep 21
EAS9:30 pmSan Sebastián
30h 42m
2 stops
ORD9:12 pmChicago O'Hare Intl
$899
British Airways
Sep 14
ORD4:55 pmChicago O'Hare Intl
13h 05m
1 stop
EAS1:00 pmSan Sebastián
Sep 21
EAS9:30 pmSan Sebastián
30h 42m
2 stops
ORD9:12 pmChicago O'Hare Intl
$903
British Airways
Sep 14
ORD10:15 pmChicago O'Hare Intl
15h 35m
1 stop
EAS8:50 pmSan Sebastián
Sep 21
EAS9:30 pmSan Sebastián
25h 30m
1 stop
ORD4:00 pmChicago O'Hare Intl
$904

momondo Fare Finder

 
Customize your flight search to find flights from Chicago 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 July 31, 2026.
Use the filters below to find and compare flights from Chicago to San Sebastian that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Wed 10/14

10:35 pm-8:40 am

2 stops27h 05m

San Sebastián

Fri 10/23

9:20 am-2:25 pm

1 stop12h 05m

$861

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Wed 10/14

10:20 pm-8:40 am

1 stop27h 20m

San Sebastián

Fri 10/23

9:20 am-2:25 pm

1 stop12h 05m

$867

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Wed 10/7

10:34 am-8:40 am

2 stops15h 06m

San Sebastián

Fri 10/16

9:20 am-9:00 pm

2 stops18h 40m

$873

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 10/13

5:55 pm-8:50 pm

2 stops19h 55m

San Sebastián

Tue 10/20

9:30 pm-2:25 pm

1 stop23h 55m

$873

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Wed 10/7

10:20 pm-8:40 am

1 stop27h 20m

San Sebastián

Fri 10/16

9:20 am-9:00 pm

2 stops18h 40m

$877

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 10/13

10:20 pm-8:40 am

1 stop27h 20m

San Sebastián

Tue 10/20

9:30 pm-2:25 pm

1 stop23h 55m

$878

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 10/13

5:55 pm-8:50 pm

2 stops19h 55m

San Sebastián

Tue 10/20

9:30 pm-1:50 pm

2 stops23h 20m

$883

ChicagoSan Sebastian

ORD - EAS

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

$896
Quickest round-trip

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 9/8

6:49 am-8:40 am

2 stops18h 51m

San Sebastián

Tue 9/15

9:20 am-2:25 pm

1 stop12h 05m

$919

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 9/8

10:25 pm-8:40 am

1 stop27h 15m

San Sebastián

Tue 9/15

9:20 am-2:25 pm

1 stop12h 05m

$924

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 Chicago 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 Chicago to San Sebastián?

British Airways, Iberia, and American Airlines are the most popular carriers operating from Chicago to San Sebastián

What airlines fly to San Sebastian?

Lufthansa, United Airlines and American Airlines are the top three most popular airlines that fly to San Sebastian from Chicago according to our data. Lufthansa is the first choice among our users, with 43% of people opting to fly with this airline when traveling to San Sebastian. Keep in mind that there are 3 different airlines that fly to San Sebastian on a routine basis, so you have a few additional options to choose from.

When to book flights from Chicago to San Sebastian

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to San Sebastian according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chicago to San Sebastian (CHI to EAS) flight deals and tips

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

Fastest flight time

13h 05m

Direct flights

None
The fastest flight from Chicago to San Sebastian takes 13h 05m
There are no direct flights from Chicago to San Sebastian. There are no popular flight routes from Chicago to San Sebastian.
Search flight deals

Frequently asked questions about flying from Chicago to San Sebastian

  • How far is Chicago to San Sebastián by plane?

    Chicago and San Sebastián are 4147.4 mi apart from one another. Typically, this will take 13h 05m by plane in normal conditions.

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

    Prices for flights from Chicago to San Sebastián Airport refresh daily.

  • How many operators does momondo search for flights from Chicago to San Sebastián Airport?

  • How old do you have to be to fly from Chicago 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 Chicago to San Sebastián Airport.

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

    The travel and health documents you'll need for your trip to San Sebastián Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Sebastián Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Chicago to San Sebastian

Compare and see reviews for airlines that fly from Chicago to San Sebastian with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $694Free CancellationRating
7.1
11,845 reviews
Search American Airlines flights

Traveling to a place near San Sebastian?

Book flights to San Sebastian if you plan to visit one of these locations
Irun
Hondarribia

Why use momondo?

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

It is quick and easy to find Chicago to San Sebastian flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Sebastian that suits you.

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

All flight searches from Chicago to San Sebastian on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Chicago and San Sebastian by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Price alerts on flights to San Sebastian from Chicago are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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