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San Sebastian

$417+ Cheap flights from Illinois to San Sebastian (EAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — EAS
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Illinois to San Sebastian

Cheapest flights from Illinois to San Sebastian
Explore the most affordable flight options available from Illinois to San Sebastian. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This American Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/304:30 pm
ORD
-
EAS
1 stop13h 30m
American Airlines
Wed 4/89:20 am
EAS
-
ORD
1 stop11h 55m
American Airlines
Deal found 1/27$798
This American Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/87:10 am
ORD
-
EAS
2 stops18h 30m
American Airlines
Tue 9/159:20 am
EAS
-
ORD
1 stop11h 55m
American Airlines
Deal found 1/28$805
This Iberia deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/304:30 pm
ORD
-
EAS
1 stop13h 30m
Iberia
Wed 4/89:30 pm
EAS
-
ORD
1 stop23h 45m
Iberia
Deal found 1/28$812
This Travelocity deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/121:59 pm
ORD
-
EAS
2 stops35h 41m
Iberia
Sun 9/279:30 pm
EAS
-
ORD
2 stops46h 50m
Iberia
Deal found 1/27$837
This American Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:00 am
ORD
-
EAS
2 stops17h 40m
American Airlines
Tue 6/29:20 am
EAS
-
ORD
1 stop11h 55m
American Airlines
Deal found 1/28$935
This Iberia deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/3011:55 am
STL
-
EAS
2 stops25h 55m
Iberia
Tue 2/39:20 am
EAS
-
STL
2 stops20h 39m
Iberia
Deal found 1/27$1,488

Find flight deals from Illinois to San Sebastian

Keep the following information in mind while searching for Illinois to San Sebastian flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$798
(American Airlines)

One-way from

$417
(Kiwi.com)
Provider with most accurate pricing for Chicago (CHI)-San Sebastián flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-San Sebastián flights.
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From Illinois to San Sebastián
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One-way flight from Illinois to San Sebastián
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois 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, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Illinois to San Sebastian that are best for you.

Fly from

Illinois

Fly to

San Sebastian

Route

Depart

Return

Price

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

9:30 pm-2:15 pm

1 stop23h 45m

$812

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

Thu 2/19

5:40 pm-1:00 pm

1 stop12h 20m

San Sebastián

Mon 2/23

9:30 pm-2:55 pm

1 stop24h 25m

$1,067

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Sat 5/16

9:00 pm-8:20 am

3 stops28h 20m

$417

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Sat 5/16

4:30 pm-1:00 pm

1 stop13h 30m

$715

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Best time to book a flight from Illinois to San Sebastian

Have a flexible travel schedule? Discover the best time to fly to San Sebastian from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to San Sebastian

What is the cheapest month to book a flight from Illinois to San Sebastian?

Currently, August is the cheapest month in which you can book a flight from Illinois to San Sebastian (average of $547). Flying from Illinois to San Sebastian in January is currently the most expensive (average of $901). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Illinois to San Sebastian. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to San Sebastian from Illinois?

    San Sebastián (EAS), located 9.7 mi from the city center, is the airport you fly into when you book flights from Illinois to San Sebastian.

  • How long is the flight from Illinois to San Sebastian?

    For as low as $812, American Airlines can have you in San Sebastian from Illinois in 13h 30m. The distance from Illinois to San Sebastian is about 4162 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Illinois to San Sebastian that include hotel bookings?

    Yes. In addition to deals on Illinois to San Sebastian flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to San Sebastian?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to San Sebastian.

  • Can I find deals for business class flights from Illinois to San Sebastian?

    Yes. Cheapflights offers flight deals from Illinois to San Sebastian by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to San Sebastian?

    Currently, August is the cheapest month in which you can book a flight from Illinois to San Sebastian (average of $547). Flying from Illinois to San Sebastian in January is currently the most expensive (average of $901). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Illinois to San Sebastian

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Illinois to San Sebastian

Discover the top airline that operate flights from Illinois to San Sebastian. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$694Average$1,754FlexibilityNo cancel feeOn-time71%

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