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Cheap flights from Chicago O'Hare Intl Airport to San Sebastian from $321

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 O'Hare Intl Airport to San Sebastian departing on 9/28. 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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Find the cheapest flights from Chicago O'Hare Intl Airport to San Sebastian

Cheap round-trip flights

Iberia Logo
10:11 am - 8:40 amORD-EAS
15h 29m2 stops
Iberia Logo
9:30 pm - 2:00 pmEAS-ORD
23h 30m2 stops
$779Iberia
Find Deal
Tue, Oct 7 - Tue, Oct 14
Iberia Logo
10:11 am - 8:40 amORD-EAS
15h 29m2 stops
Iberia Logo
9:30 pm - 6:50 pmEAS-ORD
28h 20m1 stop
$792Iberia
Find Deal
Tue, Oct 7 - Tue, Oct 14
American Airlines Logo
4:45 pm - 8:50 pmORD-EAS
21h 05m1 stop
American Airlines Logo
9:20 am - 12:37 amEAS-ORD
22h 17m2 stops
$807American Airlines
Find Deal
Fri, Nov 7 - Tue, Nov 11
American Airlines Logo
11:48 am - 8:50 pmORD-EAS
26h 02m2 stops
American Airlines Logo
9:20 am - 10:15 pmEAS-ORD
19h 55m2 stops
$811American Airlines
Find Deal
Fri, Nov 7 - Tue, Nov 11
Logo
9:41 am - 8:40 amORD-EAS
15h 59m2 stops
Logo
9:30 pm - 2:30 pmEAS-ORD
24h 00m1 stop
$871
Find Deal
Mon, Oct 20 - Mon, Nov 3
Logo
10:30 pm - 8:40 amORD-EAS
27h 10m1 stop
Logo
9:30 pm - 2:30 pmEAS-ORD
24h 00m1 stop
$875
Find Deal
Mon, Oct 20 - Mon, Nov 3
Iberia Logo
4:30 pm - 8:50 pmORD-EAS
21h 20m1 stop
Iberia Logo
9:30 pm - 6:50 pmEAS-ORD
28h 20m1 stop
$879Iberia
Find Deal
Tue, Oct 7 - Tue, Oct 14
Logo
10:30 pm - 8:40 amORD-EAS
27h 10m1 stop
Logo
9:20 am - 11:53 pmEAS-ORD
20h 33m2 stops
$970
Find Deal
Tue, Oct 21 - Sun, Oct 26
American Airlines Logo
8:20 am - 8:40 amORD-EAS
17h 20m2 stops
American Airlines Logo
9:20 am - 10:56 pmEAS-ORD
20h 36m2 stops
$1,279American Airlines
Find Deal
Tue, Nov 25 - Sun, Nov 30
American Airlines Logo
11:48 am - 8:40 amORD-EAS
13h 52m2 stops
American Airlines Logo
9:20 am - 10:56 pmEAS-ORD
20h 36m2 stops
$1,436American Airlines
Find Deal
Thu, Nov 20 - Sun, Nov 30

American Airlines flights from Chicago O'Hare Intl Airport to San Sebastian

Our best American Airlines deals on Chicago O'Hare Intl Airport to San Sebastian flight tickets
American Airlines
Nov 7
ORD4:45 pmChicago O'Hare Intl
21h 05m
1 stop
EAS8:50 pmSan Sebastián
Nov 11
EAS9:20 amSan Sebastián
22h 17m
2 stops
ORD12:37 amChicago O'Hare Intl
$807
Find similar
American Airlines
Nov 7
ORD11:48 amChicago O'Hare Intl
26h 02m
2 stops
EAS8:50 pmSan Sebastián
Nov 11
EAS9:20 amSan Sebastián
19h 55m
2 stops
ORD10:15 pmChicago O'Hare Intl
$811
Find similar
American Airlines
Nov 25
ORD8:20 amChicago O'Hare Intl
17h 20m
2 stops
EAS8:40 amSan Sebastián
Nov 30
EAS9:20 amSan Sebastián
20h 36m
2 stops
ORD10:56 pmChicago O'Hare Intl
$1,279
Find similar

Iberia flights from Chicago O'Hare Intl Airport to San Sebastian

Our best Iberia deals on Chicago O'Hare Intl Airport to San Sebastian flight tickets
Iberia
Oct 7
ORD10:11 amChicago O'Hare Intl
15h 29m
2 stops
EAS8:40 amSan Sebastián
Oct 14
EAS9:30 pmSan Sebastián
23h 30m
2 stops
ORD2:00 pmChicago O'Hare Intl
$779
Find similar
Iberia
Oct 7
ORD10:11 amChicago O'Hare Intl
15h 29m
2 stops
EAS8:40 amSan Sebastián
Oct 14
EAS9:30 pmSan Sebastián
28h 20m
1 stop
ORD6:50 pmChicago O'Hare Intl
$792
Find similar
Iberia
Oct 7
ORD4:30 pmChicago O'Hare Intl
21h 20m
1 stop
EAS8:50 pmSan Sebastián
Oct 14
EAS9:30 pmSan Sebastián
28h 20m
1 stop
ORD6:50 pmChicago O'Hare Intl
$879
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport 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 September 15, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to San Sebastian that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 10/7

10:11 am-8:40 am

2 stops15h 29m

San Sebastián

Tue 10/14

9:30 pm-2:00 pm

2 stops23h 30m

$779

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 10/7

10:11 am-8:40 am

2 stops15h 29m

San Sebastián

Tue 10/14

9:30 pm-6:50 pm

1 stop28h 20m

$792

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

9:20 am-12:37 am

2 stops22h 17m

$807

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Fri 11/7

11:48 am-8:50 pm

2 stops26h 02m

San Sebastián

Tue 11/11

9:20 am-10:15 pm

2 stops19h 55m

$811

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 10/20

9:41 am-8:40 am

2 stops15h 59m

San Sebastián

Mon 11/3

9:30 pm-2:30 pm

1 stop24h 00m

$871

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 10/20

10:30 pm-8:40 am

1 stop27h 10m

San Sebastián

Mon 11/3

9:30 pm-2:30 pm

1 stop24h 00m

$875

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 10/7

4:30 pm-8:50 pm

1 stop21h 20m

San Sebastián

Tue 10/14

9:30 pm-6:50 pm

1 stop28h 20m

$879

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 10/21

10:30 pm-8:40 am

1 stop27h 10m

San Sebastián

Sun 10/26

9:20 am-11:53 pm

2 stops20h 33m

$970

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 11/25

8:20 am-8:40 am

2 stops17h 20m

San Sebastián

Sun 11/30

9:20 am-10:56 pm

2 stops20h 36m

$1,279

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Thu 11/20

11:48 am-8:40 am

2 stops13h 52m

San Sebastián

Sun 11/30

9:20 am-10:56 pm

2 stops20h 36m

$1,436

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Chicago O'Hare Intl Airport 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 day to depart on your flight to San Sebastian?

On average, the least expensive day to fly to San Sebastian from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport 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 O'Hare Intl Airport 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 O'Hare Intl Airport to San Sebastian

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

Cheap Chicago O'Hare Intl Airport to San Sebastian (ORD to EAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to San Sebastian

Direct flights

None
There are no direct flights from Chicago O'Hare Intl Airport to San Sebastian. There are no popular flight routes from Chicago O'Hare Intl Airport to San Sebastian.
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  • How far is Chicago O'Hare Intl to San Sebastián by plane?

    The distance between Chicago O'Hare Intl and San Sebastián is about 4155.4 mi. Flights usually cover this in 13h 15m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Chicago O'Hare Intl Airport to San Sebastián Airport were last updated today.

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

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to San Sebastián Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago O'Hare Intl Airport 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.

  • What is the most popular airline from Chicago O'Hare Intl Airport to San Sebastian?

Best airlines flying from Chicago O'Hare Intl Airport to San Sebastian

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to San Sebastian with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $694Free CancellationRating
7.2
10,000 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
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Hondarribia

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Sebastian from Chicago.

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

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

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

Once all potential Chicago to San Sebastian flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to San Sebastian, momondo offers a useful price alert feature which will track prices for flights to San Sebastian from Chicago and alert you when they change.

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