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>

$766 CHEAP FLIGHTS from Illinois to San Sebastian

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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, Nov 7 - Tue, Nov 11

3:08 pm - 1:00 pmORD-EAS

14h 52m2 stops

9:30 pm - 5:38 pmEAS-ORD

27h 08m2 stops

$766Iberia

Find Deal

Fri, Nov 7 - Tue, Nov 11

11:39 am - 1:00 pmSTL-EAS

18h 21m2 stops

9:20 am - 8:23 pmEAS-STL

18h 03m2 stops

$769Iberia

Find Deal

Sun, Sep 14 - Sun, Sep 21

1:03 pm - 8:40 amSTL-EAS

36h 37m2 stops

9:30 pm - 11:48 pmEAS-STL

33h 18m2 stops

$830Iberia

Find Deal

Thu, Nov 20 - Sun, Nov 30

7:20 pm - 8:50 pmORD-EAS

18h 30m2 stops

9:20 am - 4:45 pmEAS-ORD

38h 25m2 stops

$836

Find Deal

Fri, Sep 5 - Sat, Sep 13

4:30 pm - 8:40 amORD-EAS

33h 10m1 stop

9:30 pm - 5:23 pmEAS-ORD

26h 53m2 stops

$875Iberia

Find Deal

Fri, Nov 7 - Tue, Nov 11

8:30 am - 1:00 pmORD-EAS

21h 30m2 stops

1:40 pm - 2:30 pmEAS-ORD

31h 50m1 stop

$931American Airlines

Find Deal

Fri, Nov 7 - Tue, Nov 11

8:30 am - 1:00 pmORD-EAS

21h 30m2 stops

1:40 pm - 10:51 amEAS-ORD

28h 11m2 stops

$938American Airlines

Find Deal

Thu, Nov 20 - Sun, Nov 30

4:45 pm - 1:00 pmORD-EAS

13h 15m1 stop

9:20 am - 2:00 pmEAS-ORD

35h 40m2 stops

$1,165

Find Deal

Sun, Sep 14 - Sun, Sep 21

7:15 pm - 8:50 pmORD-EAS

18h 35m2 stops

1:40 pm - 11:50 amEAS-ORD

29h 10m2 stops

$1,819British Airways

Find Deal

Sun, Sep 14 - Sun, Sep 21

10:30 pm - 8:50 pmORD-EAS

15h 20m1 stop

1:40 pm - 11:50 amEAS-ORD

29h 10m2 stops

$1,820British Airways

Find Deal

Useful Info

High season	June
Cheapest flight	$766

Most popular time to fly with an average 20% increase in price.

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

Everything you need to know for your flight to San Sebastian

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

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Return flight deals

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

San Sebastian (EAS)

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EAS

$766 Find Cheap Flights from Illinois to San Sebastian

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

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