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$354+ Cheap flights from Chicago (CHI) 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 7/24. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — EAS
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Chicago to San Sebastian

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to San Sebastian (EAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2025.

Round-trip from

$745
(Iberia)

One-way from

$354
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$1,225
From Chicago (CHI) to San Sebastián
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One-way flight from Chicago (CHI) to San Sebastián
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Highest demand for flights based on searches. 1% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($79 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Chicago to San Sebastian

Cheapest flights from Chicago to San Sebastian
Explore the most affordable flight options available from Chicago to San Sebastian. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Iberia deal was found by Cheapflights users on 6/10. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/94:30 pmORD - EAS
1 stop21h 20mIberia
Thu 9/189:20 amEAS - ORD
1 stop11h 55mIberia
Deal found 6/10$745
This Orbitz deal was found by Cheapflights users on 6/9. 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.
Wed 9/34:55 pmORD - EAS
2 stops32h 45mMultiple Airlines
Tue 9/99:30 pmEAS - ORD
1 stop23h 45mMultiple Airlines
Deal found 6/9$760
This American Airlines deal was found by Cheapflights users on 6/9. 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.
Thu 9/48:38 amORD - EAS
2 stops17h 02mAmerican Airlines
Tue 9/99:20 amEAS - ORD
2 stops19h 03mAmerican Airlines
Deal found 6/9$820
This Avianca deal was found by Cheapflights users on 6/9. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/42:35 pmORD - EAS
2 stops35h 05mAvianca
Wed 9/101:40 pmEAS - ORD
2 stops30h 35mAvianca
Deal found 6/9$1,507
This AranGrant deal was found by Cheapflights users on 6/12. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/144:30 pmORD - EAS
1 stop21h 20mBritish Airways
Sun 9/211:40 pmEAS - ORD
1 stop11h 35mBritish Airways
Deal found 6/12$1,834

Cheapflights Fare Finder

Customize your flight search to find flights from Chicago 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 June 12, 2025.
Use the filters below to find and compare flights from Chicago to San Sebastian that are best for you.

Fly from

Chicago

Fly to

San Sebastian

Route

Depart

Return

Price

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 9/9

4:30 pm-8:50 pm

1 stop21h 20m

San Sebastián

Thu 9/18

9:20 am-2:15 pm

1 stop11h 55m

$745

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Wed 9/3

4:55 pm-8:40 am

2 stops32h 45m

San Sebastián

Tue 9/9

9:30 pm-2:15 pm

1 stop23h 45m

$760

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Thu 9/4

8:38 am-8:40 am

2 stops17h 02m

San Sebastián

Tue 9/9

9:20 am-9:23 pm

2 stops19h 03m

$820

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Thu 9/4

2:35 pm-8:40 am

2 stops35h 05m

San Sebastián

Wed 9/10

1:40 pm-1:15 pm

2 stops30h 35m

$1,507

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Sun 9/14

4:30 pm-8:50 pm

1 stop21h 20m

San Sebastián

Sun 9/21

1:40 pm-6:15 pm

1 stop11h 35m

$1,834

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Thu 7/24

7:25 pm-8:20 am

2 stops29h 55m

$354

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Thu 7/24

4:30 pm-8:50 pm

1 stop21h 20m

$693

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Thu 7/24

7:25 am-8:40 am

2 stops18h 15m

$698

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Best time to book a flight from Chicago to San Sebastian

Have a flexible travel schedule? Discover the best time to fly to San Sebastian from Chicago 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 Chicago to San Sebastian
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing San Sebastian

Get insights into the airlines that provide service to San Sebastian. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Sebastian. Reviews last updated June 12, 2025.
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Food

6.5

Crew

8.0

Comfort

7.2

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Leonardo,May 2025

JFK - BGI

Good airline and so far i give them 8 out of 10.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Food

6.5

Crew

8.0

Comfort

7.2

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Leonardo,May 2025

JFK - BGI

Good airline and so far i give them 8 out of 10.
Iberia
7.0
Good
2,776 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Food

6.5

Crew

8.0

Comfort

7.2

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Leonardo,May 2025

JFK - BGI

Good airline and so far i give them 8 out of 10.
Avianca
6.7
Okay
2,345 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Food

6.5

Crew

8.0

Comfort

7.2

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Leonardo,May 2025

JFK - BGI

Good airline and so far i give them 8 out of 10.
British Airways
6.6
Okay
7,008 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Food

6.5

Crew

8.0

Comfort

7.2

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Leonardo,May 2025

JFK - BGI

Good airline and so far i give them 8 out of 10.

Related info for your journey

Find useful and relevant information for your journey from Chicago 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 Chicago?

    San Sebastián (EAS), located 9.7 mi from the city center, is the airport you fly into when you book flights from Chicago to San Sebastian. 1 airline have flights to San Sebastián from Chicago on a regular basis. Booking flights from Chicago to San Sebastián should not be difficult; the airport handles an average of 0 inbound flights from Chicago per day.

  • What are the cheapest airlines flying from Chicago to San Sebastian round-trip?

    Flying on Iberia is currently your cheapest option to San Sebastian, with prices starting at $745. Additional round-trip tickets that might be worth considering are offered by American Airlines and Avianca, with the lowest prices starting at $820 and $1,507, respectively. Iberia is priced at 30% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Chicago to San Sebastian that include hotel bookings?

    Yes. In addition to deals on Chicago to San Sebastian flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to San Sebastian?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to San Sebastian.

  • Can I find deals for business class flights from Chicago to San Sebastian?

    Yes. Cheapflights offers flight deals from Chicago 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.

See more FAQs

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Alternative routes for Chicago to San Sebastian

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Bilbao flights
O'Hare Intl to San Sebastian flights
Midway to Bilbao flights
St. Louis to Bilbao flights
St. Louis to San Sebastian flights

Top airline flying from Chicago to San Sebastian

Discover the top airline that operate flights from Chicago 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$679Average$1,134FlexibilityNo cancel feeOn-time77%

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