How does KAYAK find such low prices on flights from Illinois to San Sebastian?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to San Sebastian. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San Sebastian?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Sebastian from Illinois is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Illinois to San Sebastian?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Sebastian with an airline and back to Illinois with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to San Sebastian?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Sebastian from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$343 Cheap Flights from Illinois to San Sebastian

EAS

KAYAK searches hundreds of travel sites at once for deals on flights to San Sebastian

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Cheapest round-trip

$582

Iberia

Fri 1/30Fri 2/6

STL - EAS • 2 stops

Cheapest one-way

$343

Multiple Airlines

Wed 1/28

ORD - EAS • 3 stops

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to San Sebastian!

Flight Deals

Cheap Flights from Illinois to San Sebastian

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to San Sebastian that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from Illinois to San Sebastian

Fri, Jan 30 - Fri, Feb 6

2:54 pm - 8:50 pm

STL

EAS

22h 56m2 stops

9:20 am - 6:14 pm

EAS

STL

15h 54m2 stops

$582Iberia

Fri, Jan 30 - Fri, Feb 6

5:40 pm - 8:50 pm

ORD

EAS

20h 10m1 stop

9:20 am - 2:55 pm

EAS

ORD

12h 35m1 stop

$767Iberia

Wed, Jan 28 - Sun, Feb 1

1:34 pm - 1:00 pm

ORD

EAS

16h 26m2 stops

9:20 am - 2:55 pm

EAS

ORD

12h 35m1 stop

$771Iberia

Wed, Jan 28 - Sun, Feb 1

8:12 am - 8:40 am

ORD

EAS

17h 28m2 stops

9:20 am - 8:10 pm

EAS

ORD

17h 50m2 stops

$781American Airlines

Thu, Jan 15 - Mon, Jan 19

8:16 am - 8:40 am

ORD

EAS

17h 24m2 stops

9:30 pm - 2:55 pm

EAS

ORD

24h 25m1 stop

$782American Airlines

Wed, Jan 28 - Sun, Feb 1

11:52 am - 1:00 pm

ORD

EAS

18h 08m2 stops

9:30 pm - 8:10 pm

EAS

ORD

29h 40m2 stops

$792Iberia

Sat, Jan 31 - Sat, Feb 7

5:50 pm - 8:40 am

ORD

EAS

31h 50m2 stops

9:30 pm - 2:55 pm

EAS

ORD

24h 25m1 stop

$794Iberia

Wed, Feb 4 - Sun, Feb 8

9:33 am - 8:50 pm

STL

EAS

28h 17m2 stops

1:40 pm - 9:03 am

EAS

STL

26h 23m2 stops

$810Iberia

Thu, Jan 15 - Mon, Jan 19

8:16 am - 8:40 am

ORD

EAS

17h 24m2 stops

9:30 pm - 1:50 pm

EAS

ORD

23h 20m2 stops

$816American Airlines

Wed, Feb 4 - Sun, Feb 8

11:55 am - 8:40 am

STL

EAS

37h 45m2 stops

9:20 am - 9:15 pm

EAS

STL

18h 55m2 stops

$817Iberia

Useful Info

Cheapest flight	$343

Flight from Chicago to San Sebastian

How does KAYAK find such low prices on flights from Illinois to San Sebastian?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to San Sebastian.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San Sebastian?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Sebastian from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to San Sebastian?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Sebastian with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to San Sebastian?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Sebastian from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Irun

Hondarribia

Everything you need to know for your flight to San Sebastian

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in San Sebastian

San Sebastian (EAS)

EAS

$343 Find Cheap Flights from Illinois to San Sebastian

KAYAK searches hundreds of travel sites at once for deals on flights to San Sebastian

Everything you should know

Cheap Flights from Illinois to San Sebastian

Recent round-trip flight deals from Illinois to San Sebastian

Recent one-way flight deals from Illinois to San Sebastian

Good to know

FAQs for booking flights from Illinois to San Sebastian

How does KAYAK find such low prices on flights from Illinois to San Sebastian?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to San Sebastian.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San Sebastian?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Sebastian from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Illinois to San Sebastian?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Sebastian with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to San Sebastian?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Sebastian from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near San Sebastian?

Everything you need to know for your flight to San Sebastian

Information on the airport you'll fly into in San Sebastian

Cabin class types available on flights to Illinois

Complete your trip to San Sebastian with a hotel stay or car rental

Find direct flights for San Sebastian

Flights to other popular destinations

Flights from domestic origins to San Sebastian

Choose which airport to fly into in San Sebastian

Find deals for your return flight