What airlines fly to San Sebastian?

Iberia, Lufthansa and United Airlines are the top three most popular airlines that fly to San Sebastian from Chicago according to our data. Iberia 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.

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

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

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 August 2025.

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.

$241 Cheap Flights from Chicago to San Sebastian (CHI-EAS) in 2025

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Find the cheapest flights from Chicago to San Sebastian (CHI-EAS)

Round-trip

One-way

Last minute

Cheap round-trip flights

4:45 pm - 1:00 pmORD-EAS

13h 15m1 stop

9:30 pm - 2:30 pmEAS-ORD

24h 00m1 stop

$677Iberia

Find Deal

Tue, Feb 17 - Thu, Feb 26

10:07 am - 8:40 amORD-EAS

15h 33m2 stops

9:20 am - 10:01 pmEAS-ORD

19h 41m2 stops

$681American Airlines

Find Deal

Tue, Feb 17 - Thu, Feb 26

11:40 am - 8:40 amORD-EAS

14h 00m2 stops

9:20 am - 2:30 pmEAS-ORD

12h 10m1 stop

$721Iberia

Find Deal

Thu, Jan 15 - Thu, Jan 22

11:40 am - 1:00 pmORD-EAS

18h 20m2 stops

9:30 pm - 5:38 pmEAS-ORD

27h 08m2 stops

$742Iberia

Find Deal

Thu, Jan 15 - Thu, Jan 22

4:20 pm - 8:50 pmORD-EAS

21h 30m2 stops

9:30 pm - 6:25 pmEAS-ORD

27h 55m2 stops

$806

Find Deal

Thu, Jan 8 - Wed, Jan 14

11:46 am - 8:40 amORD-EAS

13h 54m2 stops

9:20 am - 9:23 pmEAS-ORD

19h 03m2 stops

$848American Airlines

Find Deal

Sat, Sep 20 - Thu, Oct 9

4:45 pm - 1:00 pmORD-EAS

13h 15m1 stop

9:20 am - 2:30 pmEAS-ORD

12h 10m1 stop

$924Iberia

Find Deal

Thu, Jan 15 - Thu, Jan 22

4:45 pm - 8:50 pmORD-EAS

21h 05m1 stop

1:40 pm - 11:06 amEAS-ORD

28h 26m2 stops

$926American Airlines

Find Deal

Fri, Nov 7 - Tue, Nov 11

4:45 pm - 8:50 pmORD-EAS

21h 05m1 stop

1:40 pm - 2:30 pmEAS-ORD

31h 50m1 stop

$927American Airlines

Find Deal

Fri, Nov 7 - Tue, Nov 11

4:55 pm - 4:15 pmORD-EAS

16h 20m1 stop

1:25 pm - 4:05 pmEAS-ORD

57h 40m2 stops

$1,001British Airways

Find Deal

Sat, Sep 20 - Thu, Oct 9

Iberia flights from Chicago to San Sebastian

Our best Iberia deals on Chicago to San Sebastian flight tickets

Iberia

Feb 17

ORD4:45 pmChicago O'Hare Intl

13h 15m

1 stop

EAS1:00 pmSan Sebastián

Feb 26

EAS9:30 pmSan Sebastián

24h 00m

1 stop

ORD2:30 pmChicago O'Hare Intl

$677

Find similar

Iberia

Jan 15

ORD11:40 amChicago O'Hare Intl

14h 00m

2 stops

EAS8:40 amSan Sebastián

Jan 22

EAS9:20 amSan Sebastián

12h 10m

1 stop

ORD2:30 pmChicago O'Hare Intl

$721

Find similar

Iberia

Jan 15

ORD11:40 amChicago O'Hare Intl

18h 20m

2 stops

EAS1:00 pmSan Sebastián

Jan 22

EAS9:30 pmSan Sebastián

27h 08m

2 stops

ORD5:38 pmChicago O'Hare Intl

$742

Find similar

American Airlines flights from Chicago to San Sebastian

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

American Airlines

Feb 17

ORD10:07 amChicago O'Hare Intl

15h 33m

2 stops

EAS8:40 amSan Sebastián

Feb 26

EAS9:20 amSan Sebastián

19h 41m

2 stops

ORD10:01 pmChicago O'Hare Intl

$681

Find similar

American Airlines

Sep 20

ORD11:46 amChicago O'Hare Intl

13h 54m

2 stops

EAS8:40 amSan Sebastián

Oct 9

EAS9:20 amSan Sebastián

19h 03m

2 stops

ORD9:23 pmChicago O'Hare Intl

$848

Find similar

American Airlines

Nov 7

ORD4:45 pmChicago O'Hare Intl

21h 05m

1 stop

EAS8:50 pmSan Sebastián

Nov 11

EAS1:40 pmSan Sebastián

28h 26m

2 stops

ORD11:06 amChicago O'Hare Intl

$926

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 2/17

4:45 pm-1:00 pm

1 stop13h 15m

San Sebastián

Thu 2/26

9:30 pm-2:30 pm

1 stop24h 00m

$677

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 2/17

10:07 am-8:40 am

2 stops15h 33m

San Sebastián

Thu 2/26

9:20 am-10:01 pm

2 stops19h 41m

$681

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Thu 1/15

11:40 am-8:40 am

2 stops14h 00m

San Sebastián

Thu 1/22

9:20 am-2:30 pm

1 stop12h 10m

$721

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Thu 1/15

11:40 am-1:00 pm

2 stops18h 20m

San Sebastián

Thu 1/22

9:30 pm-5:38 pm

2 stops27h 08m

$742

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Thu 1/8

4:20 pm-8:50 pm

2 stops21h 30m

San Sebastián

Wed 1/14

9:30 pm-6:25 pm

2 stops27h 55m

$806

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Sat 9/20

11:46 am-8:40 am

2 stops13h 54m

San Sebastián

Thu 10/9

9:20 am-9:23 pm

2 stops19h 03m

$848

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Thu 1/15

4:45 pm-1:00 pm

1 stop13h 15m

San Sebastián

Thu 1/22

9:20 am-2:30 pm

1 stop12h 10m

$924

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Fri 11/7

4:45 pm-8:50 pm

1 stop21h 05m

San Sebastián

Tue 11/11

1:40 pm-11:06 am

2 stops28h 26m

$926

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Fri 11/7

4:45 pm-8:50 pm

1 stop21h 05m

San Sebastián

Tue 11/11

1:40 pm-2:30 pm

1 stop31h 50m

$927

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Sat 9/20

4:55 pm-4:15 pm

1 stop16h 20m

San Sebastián

Thu 10/9

1:25 pm-4:05 pm

2 stops57h 40m

$1,001

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

Prices

Airlines

What is the cheapest day to depart on your flight to San Sebastian?

On average, the least expensive day to fly to San Sebastian from Chicago is on a Friday. momondo users have found tickets for Friday departures for as low as $827. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Chicago to San Sebastian for around $1,488.

What is the cheapest time of day to depart on your flight to San Sebastian?

Flying to San Sebastian from Chicago in the morning is the least expensive time of day to depart. momondo users have found prices as low as $962 when looking at flights departing in the morning. Flights to San Sebastian are more costly in the afternoon, with an average ticket price of $1,256. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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

Direct flights	None

There are no direct flights from Chicago to San Sebastian. There are no popular flight routes from Chicago to San Sebastian.

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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 15m 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 August 2025.
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 $1,039	Free Cancellation	Rating 7.2 10,000 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.