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San Sebastian

$357+ 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 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — EAS
dic. 3 — dic. 101
mié. 12/3
mié. 12/10
1 adult, Economy
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Cheap 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 noviembre 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$731
(American Airlines)

One-way from

$357
(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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Find 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 noviembre 3, 2025.

This Gurufare deal was found by Cheapflights users on 11/2. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/2410:29 amORD - EAS
2 stops15h 11mMultiple Airlines
mié. 12/39:30 pmEAS - ORD
1 stop24h 00mMultiple Airlines
Deal found 11/2$821
This Expedia deal was found by Cheapflights users on 11/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/237:34 pmORD - EAS
2 stops34h 26mIberia
mar. 12/29:30 pmEAS - ORD
2 stops23h 20mIberia
Deal found 11/2$822
This FlightHub deal was found by Cheapflights users on 11/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/1810:29 amORD - EAS
2 stops15h 11mMultiple Airlines
mié. 12/39:30 pmEAS - ORD
1 stop24h 00mMultiple Airlines
Deal found 11/2$843
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/185:40 pmORD - EAS
1 stop12h 20mMultiple Airlines
mar. 12/29:30 pmEAS - ORD
2 stops23h 30mMultiple Airlines
Deal found 11/2$853
This Orbitz deal was found by Cheapflights users on 11/2. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/1911:48 amORD - EAS
2 stops18h 12mIberia
mié. 12/39:30 pmEAS - ORD
1 stop24h 25mIberia
Deal found 11/2$903
This Expedia deal was found by Cheapflights users on 11/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/1911:48 amORD - EAS
2 stops13h 52mIberia
mar. 12/29:30 pmEAS - ORD
2 stops23h 20mIberia
Deal found 11/2$908
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/245:40 pmORD - EAS
1 stop12h 20mMultiple Airlines
mar. 12/22:05 pmEAS - ORD
2 stops31h 55mMultiple Airlines
Deal found 11/2$947
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/245:40 pmORD - EAS
1 stop32h 00mMultiple Airlines
jue. 12/49:30 pmEAS - ORD
2 stops24h 55mMultiple Airlines
Deal found 11/2$964
This American Airlines deal was found by Cheapflights users on 11/1. 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.
mié. 11/128:13 amSTL - EAS
2 stops17h 27mAmerican Airlines
dom. 11/169:20 amEAS - STL
2 stops37h 51mAmerican Airlines
Deal found 11/1$1,420

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 noviembre 3, 2025.
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

mié. 1/28

11:52 am-1:00 pm

2 stops18h 08m

San Sebastián

dom. 2/1

9:20 am-8:10 pm

2 stops17h 50m

$731

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

lun. 11/24

4:45 pm-8:40 am

1 stop32h 55m

San Sebastián

mié. 12/3

9:30 pm-2:30 pm

1 stop24h 00m

$825

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

mié. 11/19

11:48 am-1:00 pm

2 stops18h 12m

San Sebastián

mié. 12/3

9:30 pm-2:55 pm

1 stop24h 25m

$903

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

mié. 11/19

11:48 am-8:40 am

2 stops13h 52m

San Sebastián

mar. 12/2

9:30 pm-1:50 pm

2 stops23h 20m

$908

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

lun. 11/24

5:40 pm-8:40 am

1 stop32h 00m

San Sebastián

jue. 12/4

9:30 pm-3:25 pm

2 stops24h 55m

$964

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

lun. 11/24

8:40 pm-8:40 am

2 stops29h 00m

San Sebastián

vie. 12/5

9:20 am-2:55 pm

1 stop12h 35m

$1,000

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

lun. 11/24

5:40 pm-1:00 pm

1 stop12h 20m

San Sebastián

jue. 12/4

9:20 am-2:55 pm

1 stop12h 35m

$1,004

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

mar. 1/6

6:30 pm-1:30 pm

3 stops36h 00m

$357

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

lun. 1/5

6:30 pm-1:30 pm

3 stops36h 00m

$366

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

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 July is currently the most expensive (average of $871). 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.

What is the cheapest time of day to fly from IL to EAS?

Find hourly flight availability from Illinois to San Sebastian. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated noviembre 3, 2025.

It’s typically best to fly out from Illinois to San Sebastian in the afternoon. Doing so could potentially save you 43% on the flight price compared to flying at noon, which is usually more expensive.

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 $731, American Airlines can have you in San Sebastian from Illinois in 18h 08m. The distance from Illinois to San Sebastian is about 4162 mi.

  • 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 July is currently the most expensive (average of $871). 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 noviembre 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$694Average$1,754FlexibilityNo cancel feeOn-time71%

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