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Cheap flights from Illinois to San Sebastian from $454

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to San Sebastian departing on 9/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Illinois to San Sebastian

Cheap round-trip flights

Enter your travel dates to find the best prices.
Iberia Logo
10:15 pm - 8:50 pm
ORD
-
EAS
15h 35m
1 stop
Iberia Logo
9:30 pm - 4:00 pm
EAS
-
ORD
25h 30m
1 stop
$837Iberia
Mon, Sep 28 - Mon, Oct 5
British Airways Logo
10:15 pm - 8:50 pm
ORD
-
EAS
15h 35m
1 stop
British Airways Logo
9:30 pm - 4:00 pm
EAS
-
ORD
25h 30m
1 stop
$838British Airways
Mon, Sep 28 - Mon, Oct 5
Iberia Logo
4:45 pm - 1:00 pm
ORD
-
EAS
13h 15m
2 stops
Iberia Logo
9:30 pm - 4:00 pm
EAS
-
ORD
25h 30m
1 stop
$842Iberia
Mon, Sep 28 - Mon, Oct 5
Iberia Logo
4:45 pm - 1:00 pm
ORD
-
EAS
13h 15m
2 stops
Iberia Logo
9:30 pm - 3:10 pm
EAS
-
ORD
24h 40m
2 stops
$850Iberia
Mon, Sep 28 - Mon, Oct 5
Iberia Logo
9:27 am - 8:40 am
ORD
-
EAS
16h 13m
2 stops
Iberia Logo
9:30 pm - 3:10 pm
EAS
-
ORD
24h 40m
2 stops
$851Iberia
Mon, Sep 28 - Mon, Oct 5
Iberia Logo
10:15 pm - 8:40 am
ORD
-
EAS
27h 25m
1 stop
Iberia Logo
9:20 am - 4:00 pm
EAS
-
ORD
13h 40m
1 stop
$866Iberia
Tue, Sep 8 - Tue, Sep 15
British Airways Logo
12:04 pm - 1:00 pm
ORD
-
EAS
17h 56m
2 stops
British Airways Logo
9:30 pm - 11:53 pm
EAS
-
ORD
33h 23m
2 stops
$868British Airways
Mon, Sep 28 - Mon, Oct 5
Iberia Logo
10:15 pm - 8:40 am
ORD
-
EAS
27h 25m
1 stop
Iberia Logo
9:20 am - 7:45 pm
EAS
-
ORD
17h 25m
2 stops
$876Iberia
Tue, Sep 8 - Tue, Sep 15
Iberia Logo
10:15 pm - 8:40 am
ORD
-
EAS
27h 25m
1 stop
Iberia Logo
9:30 pm - 2:25 pm
EAS
-
ORD
23h 55m
1 stop
$877Iberia
Tue, Sep 8 - Tue, Sep 15
Multiple Airlines Logo
1:05 pm - 5:20 pm
STL
-
EAS
21h 15m
3 stops
Multiple Airlines Logo
5:55 pm - 8:25 pm
EAS
-
STL
33h 30m
3 stops
$2,874Multiple Airlines
Tue, May 12 - Tue, May 19

Iberia flights from Illinois to San Sebastian

Our best Iberia deals on Illinois to San Sebastian flight tickets
Iberia
Sep 28
ORD10:15 pmChicago O'Hare Intl
15h 35m
1 stop
EAS8:50 pmSan Sebastián
Oct 5
EAS9:30 pmSan Sebastián
25h 30m
1 stop
ORD4:00 pmChicago O'Hare Intl
$837
Iberia
Sep 28
ORD4:45 pmChicago O'Hare Intl
13h 15m
2 stops
EAS1:00 pmSan Sebastián
Oct 5
EAS9:30 pmSan Sebastián
25h 30m
1 stop
ORD4:00 pmChicago O'Hare Intl
$842
Iberia
Sep 28
ORD4:45 pmChicago O'Hare Intl
13h 15m
2 stops
EAS1:00 pmSan Sebastián
Oct 5
EAS9:30 pmSan Sebastián
24h 40m
2 stops
ORD3:10 pmChicago O'Hare Intl
$850

American Airlines flights from Illinois to San Sebastian

Our best American Airlines deals on Illinois to San Sebastian flight tickets
American Airlines
Aug 23
ORD8:35 amChicago O'Hare Intl
17h 05m
2 stops
EAS8:40 amSan Sebastián
Aug 30
EAS9:20 amSan Sebastián
17h 09m
2 stops
ORD7:29 pmChicago O'Hare Intl
$990
American Airlines
Jul 16
ORD7:59 amChicago O'Hare Intl
17h 41m
2 stops
EAS8:40 amSan Sebastián
Jul 24
EAS9:20 amSan Sebastián
17h 20m
2 stops
ORD7:40 pmChicago O'Hare Intl
$1,081
American Airlines
Jun 7
ORD8:48 amChicago O'Hare Intl
16h 52m
2 stops
EAS8:40 amSan Sebastián
Jun 14
EAS9:20 amSan Sebastián
17h 34m
2 stops
ORD7:54 pmChicago O'Hare Intl
$1,111

momondo 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, momondo users made 832,500 searches. Data last updated April 1, 2026.
Use the filters below to find and compare flights from Illinois to San Sebastian that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 9/28

10:15 pm-8:50 pm

1 stop15h 35m

San Sebastián

Mon 10/5

9:30 pm-4:00 pm

1 stop25h 30m

$837

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 9/28

10:15 pm-8:50 pm

1 stop15h 35m

San Sebastián

Mon 10/5

9:30 pm-4:00 pm

1 stop25h 30m

$838

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 9/28

4:45 pm-1:00 pm

2 stops13h 15m

San Sebastián

Mon 10/5

9:30 pm-4:00 pm

1 stop25h 30m

$842
Quickest round-trip

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 9/28

4:45 pm-1:00 pm

2 stops13h 15m

San Sebastián

Mon 10/5

9:30 pm-3:10 pm

2 stops24h 40m

$850

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 9/28

9:27 am-8:40 am

2 stops16h 13m

San Sebastián

Mon 10/5

9:30 pm-3:10 pm

2 stops24h 40m

$851

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 9/8

10:15 pm-8:40 am

1 stop27h 25m

San Sebastián

Tue 9/15

9:20 am-4:00 pm

1 stop13h 40m

$866

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Mon 9/28

12:04 pm-1:00 pm

2 stops17h 56m

San Sebastián

Mon 10/5

9:30 pm-11:53 pm

2 stops33h 23m

$868

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 9/8

10:15 pm-8:40 am

1 stop27h 25m

San Sebastián

Tue 9/15

9:20 am-7:45 pm

2 stops17h 25m

$876

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 9/8

10:15 pm-8:40 am

1 stop27h 25m

San Sebastián

Tue 9/15

9:30 pm-2:25 pm

1 stop23h 55m

$877

St. LouisSan Sebastian

STL - EAS

STLEAS

Lambert-St Louis

Tue 5/12

1:05 pm-5:20 pm

3 stops21h 15m

San Sebastián

Tue 5/19

5:55 pm-8:25 pm

3 stops33h 30m

$2,874

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to San Sebastian from

How to get the cheapest flight ticket from Illinois 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 airlines fly to San Sebastian?

Lufthansa, United Airlines and American Airlines are the top three most popular airlines that fly to San Sebastian from Illinois according to our data. Lufthansa is the first choice among our users, with 36% 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.

Cheap Illinois to San Sebastian flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to San Sebastian

Fastest flight time

13h 05m

Direct flights

None
The fastest flight from Illinois to San Sebastian takes 13h 05m
There are no direct flights from Illinois to San Sebastian. There are no popular flight routes from Illinois to San Sebastian.
Search flight deals

  • When did momondo last update prices for flights from Illinois to San Sebastián Airport?

    Prices for flights from Illinois to San Sebastián Airport were last updated today.

  • How many operators does momondo search for flights from Illinois to San Sebastián Airport?

  • How old do you have to be to fly from Illinois 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 Illinois 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.

Best airlines flying from Illinois to San Sebastian

Compare and see reviews for airlines that fly from Illinois to San Sebastian with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $694Free CancellationRating
7.1
11,544 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
Irun
Hondarribia

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to San Sebastian for you.

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

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

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

momondo provides multiple filters to help you find the best flight to San Sebastian from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Illinois to San Sebastian flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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