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Cheap flights from Chicago to San Sebastian from $454

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 3/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Chicago to San Sebastian

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:25 pm - 8:20 am
ORD
-
EAS
29h 55m
3 stops
Multiple Airlines Logo
5:55 pm - 4:00 pm
EAS
-
ORD
29h 05m
2 stops
$809Multiple Airlines
Sat, Apr 25 - Sat, May 2
American Airlines Logo
4:55 pm - 1:00 pm
ORD
-
EAS
13h 05m
1 stop
American Airlines Logo
9:20 am - 2:25 pm
EAS
-
ORD
12h 05m
1 stop
$842American Airlines
Mon, Apr 13 - Wed, Apr 29
American Airlines Logo
1:11 pm - 1:00 pm
ORD
-
EAS
16h 49m
2 stops
American Airlines Logo
9:20 am - 2:25 pm
EAS
-
ORD
12h 05m
1 stop
$846American Airlines
Mon, Apr 13 - Wed, Apr 29
Iberia Logo
4:55 pm - 8:50 pm
ORD
-
EAS
20h 55m
1 stop
Iberia Logo
1:40 pm - 2:25 pm
EAS
-
ORD
31h 45m
1 stop
$853Iberia
Mon, Apr 13 - Mon, Apr 20
American Airlines Logo
1:11 pm - 1:00 pm
ORD
-
EAS
16h 49m
2 stops
American Airlines Logo
9:20 am - 8:00 pm
EAS
-
ORD
17h 40m
2 stops
$856American Airlines
Mon, Apr 13 - Wed, Apr 29
Iberia Logo
11:22 am - 8:40 am
ORD
-
EAS
14h 18m
2 stops
Iberia Logo
9:30 pm - 4:00 pm
EAS
-
ORD
25h 30m
1 stop
$857Iberia
Mon, Apr 13 - Mon, Apr 20
Iberia Logo
4:55 pm - 8:50 pm
ORD
-
EAS
20h 55m
1 stop
Iberia Logo
9:20 am - 2:25 pm
EAS
-
ORD
12h 05m
1 stop
$922Iberia
Tue, Sep 8 - Tue, Sep 15
Iberia Logo
10:15 pm - 8:40 am
ORD
-
EAS
27h 25m
1 stop
Iberia Logo
9:20 am - 2:25 pm
EAS
-
ORD
12h 05m
1 stop
$931Iberia
Tue, Sep 8 - Tue, Sep 15
Iberia Logo
4:55 pm - 8:50 pm
ORD
-
EAS
20h 55m
1 stop
Iberia Logo
9:30 pm - 2:25 pm
EAS
-
ORD
23h 55m
1 stop
$933Iberia
Tue, Sep 8 - Tue, Sep 15
Iberia Logo
7:00 pm - 8:50 pm
ORD
-
EAS
42h 50m
2 stops
Iberia Logo
9:30 pm - 2:25 pm
EAS
-
ORD
23h 55m
1 stop
$938Iberia
Sat, Apr 25 - Sat, May 2

Iberia flights from Chicago to San Sebastian

Our best Iberia deals on Chicago to San Sebastian flight tickets
Iberia
Apr 13
ORD4:55 pmChicago O'Hare Intl
20h 55m
1 stop
EAS8:50 pmSan Sebastián
Apr 20
EAS1:40 pmSan Sebastián
31h 45m
1 stop
ORD2:25 pmChicago O'Hare Intl
$853
Iberia
Apr 13
ORD11:22 amChicago O'Hare Intl
14h 18m
2 stops
EAS8:40 amSan Sebastián
Apr 20
EAS9:30 pmSan Sebastián
25h 30m
1 stop
ORD4:00 pmChicago O'Hare Intl
$857
Iberia
Sep 8
ORD4:55 pmChicago O'Hare Intl
20h 55m
1 stop
EAS8:50 pmSan Sebastián
Sep 15
EAS9:20 amSan Sebastián
12h 05m
1 stop
ORD2:25 pmChicago O'Hare Intl
$922

American Airlines flights from Chicago to San Sebastian

Our best American Airlines deals on Chicago to San Sebastian flight tickets
American Airlines
Apr 13
ORD4:55 pmChicago O'Hare Intl
13h 05m
1 stop
EAS1:00 pmSan Sebastián
Apr 29
EAS9:20 amSan Sebastián
12h 05m
1 stop
ORD2:25 pmChicago O'Hare Intl
$842
American Airlines
Apr 13
ORD1:11 pmChicago O'Hare Intl
16h 49m
2 stops
EAS1:00 pmSan Sebastián
Apr 29
EAS9:20 amSan Sebastián
12h 05m
1 stop
ORD2:25 pmChicago O'Hare Intl
$846
American Airlines
Apr 13
ORD1:11 pmChicago O'Hare Intl
16h 49m
2 stops
EAS1:00 pmSan Sebastián
Apr 29
EAS9:20 amSan Sebastián
17h 40m
2 stops
ORD8:00 pmChicago O'Hare Intl
$856

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 March 15, 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

Sat 4/25

7:25 pm-8:20 am

3 stops29h 55m

San Sebastián

Sat 5/2

5:55 pm-4:00 pm

2 stops29h 05m

$809
Quickest round-trip

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 4/13

4:55 pm-1:00 pm

1 stop13h 05m

San Sebastián

Wed 4/29

9:20 am-2:25 pm

1 stop12h 05m

$842

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 4/13

1:11 pm-1:00 pm

2 stops16h 49m

San Sebastián

Wed 4/29

9:20 am-2:25 pm

1 stop12h 05m

$846

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 4/13

4:55 pm-8:50 pm

1 stop20h 55m

San Sebastián

Mon 4/20

1:40 pm-2:25 pm

1 stop31h 45m

$853

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 4/13

1:11 pm-1:00 pm

2 stops16h 49m

San Sebastián

Wed 4/29

9:20 am-8:00 pm

2 stops17h 40m

$856

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 4/13

11:22 am-8:40 am

2 stops14h 18m

San Sebastián

Mon 4/20

9:30 pm-4:00 pm

1 stop25h 30m

$857

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 9/8

4:55 pm-8:50 pm

1 stop20h 55m

San Sebastián

Tue 9/15

9:20 am-2:25 pm

1 stop12h 05m

$922

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 9/8

10:15 pm-8:40 am

1 stop27h 25m

San Sebastián

Tue 9/15

9:20 am-2:25 pm

1 stop12h 05m

$931

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 9/8

4:55 pm-8:50 pm

1 stop20h 55m

San Sebastián

Tue 9/15

9:30 pm-2:25 pm

1 stop23h 55m

$933

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Sat 4/25

7:00 pm-8:50 pm

2 stops42h 50m

San Sebastián

Sat 5/2

9:30 pm-2:25 pm

1 stop23h 55m

$938

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?

Iberia is the most popular carrier 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 34% of people opting to fly with this airline when traveling to San Sebastian. Keep in mind that there are 4 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

  • 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
11,472 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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