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?

The number of operators available for flights from Chicago to San Sebastián Airport is 1 as of January 2026.

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.

$417 Cheap Flights from Chicago to San Sebastian in 2026

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Find the cheapest flights from Chicago to San Sebastian

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:30 pm - 1:00 pm

ORD

EAS

13h 30m

1 stop

9:20 am - 2:15 pm

EAS

ORD

11h 55m

1 stop

$798American Airlines

Mon, Mar 30 - Wed, Apr 8

8:11 am - 8:40 am

ORD

EAS

17h 29m

2 stops

9:20 am - 2:15 pm

EAS

ORD

11h 55m

1 stop

$803American Airlines

Mon, Mar 30 - Wed, Apr 8

4:30 pm - 1:00 pm

ORD

EAS

13h 30m

1 stop

1:40 pm - 12:27 am

EAS

ORD

17h 47m

2 stops

$811American Airlines

Mon, Mar 30 - Wed, Apr 8

4:30 pm - 1:00 pm

ORD

EAS

13h 30m

1 stop

9:30 pm - 2:15 pm

EAS

ORD

23h 45m

1 stop

$812Iberia

Mon, Mar 30 - Wed, Apr 8

7:52 am - 8:40 am

ORD

EAS

17h 48m

2 stops

9:20 am - 7:54 pm

EAS

ORD

17h 34m

2 stops

$813American Airlines

Mon, Mar 30 - Wed, Apr 8

11:40 am - 8:40 am

ORD

EAS

14h 00m

2 stops

1:40 pm - 12:27 am

EAS

ORD

17h 47m

2 stops

$815American Airlines

Mon, Mar 30 - Wed, Apr 8

8:00 am - 8:40 am

ORD

EAS

17h 40m

2 stops

9:20 am - 2:15 pm

EAS

ORD

11h 55m

1 stop

$935American Airlines

Mon, May 18 - Tue, Jun 2

10:25 pm - 8:40 am

ORD

EAS

27h 15m

1 stop

9:30 pm - 4:01 pm

EAS

ORD

25h 31m

2 stops

$947Iberia

Mon, May 18 - Tue, Jun 2

10:25 pm - 8:40 am

ORD

EAS

27h 15m

1 stop

9:30 pm - 2:15 pm

EAS

ORD

23h 45m

1 stop

$948Iberia

Mon, May 18 - Tue, Jun 2

10:25 pm - 8:40 am

ORD

EAS

27h 15m

1 stop

9:30 pm - 2:15 pm

EAS

ORD

23h 45m

1 stop

$951Iberia

Mon, May 18 - Tue, Jun 2

Iberia flights from Chicago to San Sebastian

Our best Iberia deals on Chicago to San Sebastian flight tickets

Iberia

Mar 30

ORD4:30 pmChicago O'Hare Intl

13h 30m

1 stop

EAS1:00 pmSan Sebastián

Apr 8

EAS9:30 pmSan Sebastián

23h 45m

1 stop

ORD2:15 pmChicago O'Hare Intl

$812

Iberia

May 18

ORD10:25 pmChicago O'Hare Intl

27h 15m

1 stop

EAS8:40 amSan Sebastián

Jun 2

EAS9:30 pmSan Sebastián

25h 31m

2 stops

ORD4:01 pmChicago O'Hare Intl

$947

Iberia

May 18

ORD10:25 pmChicago O'Hare Intl

27h 15m

1 stop

EAS8:40 amSan Sebastián

Jun 2

EAS9:30 pmSan Sebastián

23h 45m

1 stop

ORD2:15 pmChicago O'Hare Intl

$948

American Airlines flights from Chicago to San Sebastian

Our best American Airlines deals on Chicago to San Sebastian flight tickets

American Airlines

Mar 30

ORD4:30 pmChicago O'Hare Intl

13h 30m

1 stop

EAS1:00 pmSan Sebastián

Apr 8

EAS9:20 amSan Sebastián

11h 55m

1 stop

ORD2:15 pmChicago O'Hare Intl

$798

American Airlines

Mar 30

ORD8:11 amChicago O'Hare Intl

17h 29m

2 stops

EAS8:40 amSan Sebastián

Apr 8

EAS9:20 amSan Sebastián

11h 55m

1 stop

ORD2:15 pmChicago O'Hare Intl

$803

American Airlines

Mar 30

ORD4:30 pmChicago O'Hare Intl

13h 30m

1 stop

EAS1:00 pmSan Sebastián

Apr 8

EAS1:40 pmSan Sebastián

17h 47m

2 stops

ORD12:27 amChicago O'Hare Intl

$811

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 3/30

4:30 pm-1:00 pm

1 stop13h 30m

San Sebastián

Wed 4/8

9:20 am-2:15 pm

1 stop11h 55m

$798

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 3/30

8:11 am-8:40 am

2 stops17h 29m

San Sebastián

Wed 4/8

9:20 am-2:15 pm

1 stop11h 55m

$803

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 3/30

4:30 pm-1:00 pm

1 stop13h 30m

San Sebastián

Wed 4/8

1:40 pm-12:27 am

2 stops17h 47m

$811

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 3/30

4:30 pm-1:00 pm

1 stop13h 30m

San Sebastián

Wed 4/8

9:30 pm-2:15 pm

1 stop23h 45m

$812

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 3/30

7:52 am-8:40 am

2 stops17h 48m

San Sebastián

Wed 4/8

9:20 am-7:54 pm

2 stops17h 34m

$813

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 3/30

11:40 am-8:40 am

2 stops14h 00m

San Sebastián

Wed 4/8

1:40 pm-12:27 am

2 stops17h 47m

$815

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 5/18

8:00 am-8:40 am

2 stops17h 40m

San Sebastián

Tue 6/2

9:20 am-2:15 pm

1 stop11h 55m

$935

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 5/18

10:25 pm-8:40 am

1 stop27h 15m

San Sebastián

Tue 6/2

9:30 pm-4:01 pm

2 stops25h 31m

$947

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 5/18

10:25 pm-8:40 am

1 stop27h 15m

San Sebastián

Tue 6/2

9:30 pm-2:15 pm

1 stop23h 45m

$948

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 5/18

10:25 pm-8:40 am

1 stop27h 15m

San Sebastián

Tue 6/2

9:30 pm-2:15 pm

1 stop23h 45m

$951

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

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?

United Airlines, Lufthansa and Iberia are the top three most popular airlines that fly to San Sebastian from Chicago according to our data. United Airlines is the first choice among our users, with 33% 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	12h 20m
Direct flights	None

The fastest flight from Chicago to San Sebastian takes 12h 20m

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 12h 20m 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?
The number of operators available for flights from Chicago to San Sebastián Airport is 1 as of January 2026.
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.
What is the most popular airline from Chicago to San Sebastian?
Based on momondo bookings for flights between Chicago and San Sebastian, the leading airline is Iberia, making up 100% of the total bookings.

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 Airlines	PriceFrom $694	Free Cancellation	Rating 7.2 11,205 reviews		Search American Airlines flights

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.