ORD - EAS

$663 Find Cheap Flights from Chicago to San Sebastian - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to San Sebastian departing on 9/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$816
Iberia
Wed 9/16Wed 9/23
ORD - EAS • 2 stops
Cheapest one-way
$663
Multiple Airlines
Mon 9/21
ORD - EAS • 2 stops
Top airlines
Iberia
Cheapest • from $816 (round-trip)
American Airlines
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Chicago and San Sebastian. You'll need at least 1 connection.
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Flight Deals

Cheap Flights from Chicago to San Sebastian (ORD-EAS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Chicago 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.

Recent round-trip flight deals from Chicago to San Sebastian

Wed, Sep 16 - Wed, Sep 23
Iberia Logo
11:59 am - 1:00 pm
ORD
-
EAS
18h 01m
2 stops
Iberia Logo
9:20 am - 2:25 pm
EAS
-
ORD
12h 05m
1 stop
$816Iberia
Wed, Sep 16 - Wed, Sep 23
Iberia Logo
4:55 pm - 8:50 pm
ORD
-
EAS
20h 55m
1 stop
Iberia Logo
9:20 am - 2:25 pm
EAS
-
ORD
12h 05m
1 stop
$816Iberia
Tue, Sep 15 - Tue, Sep 22
Iberia Logo
11:37 am - 8:40 am
ORD
-
EAS
14h 03m
2 stops
Iberia Logo
9:20 am - 9:35 pm
EAS
-
ORD
19h 15m
2 stops
$821Iberia
Wed, Sep 16 - Wed, Sep 23
Iberia Logo
11:59 am - 1:00 pm
ORD
-
EAS
18h 01m
2 stops
Iberia Logo
9:20 am - 9:35 pm
EAS
-
ORD
19h 15m
2 stops
$821Iberia
Tue, Sep 15 - Tue, Sep 22
Iberia Logo
4:55 pm - 5:35 pm
ORD
-
EAS
17h 40m
1 stop
Iberia Logo
9:20 am - 9:35 pm
EAS
-
ORD
19h 15m
2 stops
$821Iberia
Tue, Sep 15 - Tue, Sep 22
Iberia Logo
10:15 pm - 8:50 pm
ORD
-
EAS
15h 35m
1 stop
Iberia Logo
9:20 am - 2:25 pm
EAS
-
ORD
12h 05m
1 stop
$862Iberia
Sun, Jan 10 - Fri, May 7
American Airlines Logo
6:45 am - 8:40 am
ORD
-
EAS
18h 55m
2 stops
American Airlines Logo
9:20 am - 7:32 pm
EAS
-
ORD
17h 12m
2 stops
$867American Airlines
Tue, Oct 13 - Tue, Oct 20
Iberia Logo
5:55 pm - 8:50 pm
ORD
-
EAS
19h 55m
2 stops
Iberia Logo
9:30 pm - 2:25 pm
EAS
-
ORD
23h 55m
1 stop
$873Iberia
Tue, Oct 13 - Tue, Oct 20
Iberia Logo
10:20 pm - 8:40 am
ORD
-
EAS
27h 20m
1 stop
Iberia Logo
9:30 pm - 2:25 pm
EAS
-
ORD
23h 55m
1 stop
$878Iberia
Sun, Jan 10 - Fri, May 7
American Airlines Logo
6:45 am - 8:40 am
ORD
-
EAS
18h 55m
2 stops
American Airlines Logo
9:20 am - 2:25 pm
EAS
-
ORD
12h 05m
1 stop
$889American Airlines
Booking Insights

KAYAK's insights & trends for Chicago to San Sebastian flights

Get data-powered insights and trends into flights from Chicago to San Sebastian to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Chicago to San Sebastian?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from Chicago to San Sebastian were found on Iberia ($816) and American Airlines ($867).

Find deals

Good to know

Cheapest flight

$663
Flight from Chicago to San Sebastian

When to book flights from Chicago to San Sebastian

Are your dates flexible? Find out the best times to travel from Chicago to San Sebastian based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Chicago to San Sebastian flights

  • What is the cheapest flight from Chicago O'Hare Intl Airport to San Sebastian?

    In the last 5 days, the lowest price for a flight from Chicago O'Hare Intl Airport to San Sebastian was $663 for a one-way ticket and $816 for a round-trip.

  • Do I need a passport to fly between Chicago and San Sebastian?

    Yes, you’ll need a passport to travel to San Sebastian from Chicago.

  • Which aircraft models fly most regularly from Chicago to San Sebastian?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Chicago to San Sebastian?

    oneworld is the only airline alliance operating flights between Chicago and San Sebastian.

  • How does KAYAK find such low prices on flights from Chicago 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 Chicago to San Sebastian.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Sebastian from Chicago 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 Chicago 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 Chicago with another airline. Booking your flights between Chicago and EAS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago 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 Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Chicago to San Sebastian

 
See real verified KAYAK customer reviews for airlines flying from Chicago to San Sebastian. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Chicago to San Sebastian? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11850 reviews
6.8Entertainment
6.4Food
7.5Boarding
7.2Comfort
7.9Crew
Airline reviews

Terrible. The flight I booked had a convenient departure time. Quick layover. And an arrival timed that worked for the people who had to pick me up. Thanks to delays and rebooking I got none of those things

6.0 GoodJoshua, Aug 2026
ORD - CLE
Read more American Airlines reviews

Terrible. The flight I booked had a convenient departure time. Quick layover. And an arrival timed that worked for the people who had to pick me up. Thanks to delays and rebooking I got none of those things

I had my flight of Cedar Rapids. THen Chicago to Boston. Flight out of Cedar rapids was delayed by 12 hrs. Had to drive to Chicago to catch my flight

Long delays to board due to mechanical issues with plane.

Flight was delayed, boarded, sat at the gate for more than 30 minutes, left the gate then waited on the pad for another 30 to 60 minutes then returned to the gate, deboarded and was cancelled... alternative flight was not booked automatically. Waited in line for 30 minutes but fortunately an alternate flight to a different destination was found ... no thanks to the travel agent used by kayak

The flight from Milwaukee to Dallas was great the staff absolutely amazing. After that EVERYTHING WENT DOWN HILL!!! ABSOLUTELY HORRIBLE!!! WILL NOT FLY THIS AIRLINE AGAIN

I was very unhappy with the lack of communication from the cockpit. It took close to a half an hour before we took off after the doors were closed, and we got no announcements as to progress. It would be nice to get some acknowledgement of the situation and updates as to when we are taking off.

The seat was not even cleaned. It has full of cookie crums probably from last flight's passenger. Its basic expectation that, seats are clean.

Very turbulent flight, no drinks, very little service, unorganized boarding, gate changed multiple times

The flight was delayed significantly. Communication during the flight was abrupt and caused some panic as we were navigating turbulence. It was also too loud and every announcement felt startling. The flight attendants did not offer any assurances and I felt unsettled most of the flight. The seats, floor and tray table was very dirty. The seat next to me was broken and the passenger sitting there was very uncomfortable. He had a spring in his back and his seat made terrible squeaking noises through the flight.

Significant delays on my trip to Chicago and my trip back to NY

Everything you need to know for your flight from Chicago to San Sebastian

Information on your arrival and departure airports

Chicago (ORD)
San Sebastian (EAS)