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$530+ 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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — EAS
Mar 9 — Mar 161
Sun 3/9
Sun 3/16
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 March 4, 2025.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$679
(Mytrip)

One-way from

$530
(Kiwi.com)

Popular in

December

Cheapest in

January
Provider with most accurate pricing for Chicago (CHI)-San Sebastián flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-San Sebastián flights.
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From Chicago (CHI) to San Sebastián
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One-way flight from Chicago (CHI) to San Sebastián
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High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 7% potential price decrease ($75 potential savings vs. average RT price).
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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 March 4, 2025.

This Mytrip deal was found by Cheapflights users on 3/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/12:05 pmORD - EAS
2 stops20h 15mMultiple Airlines
Tue 4/81:30 pmEAS - ORD
2 stops30h 25mMultiple Airlines
Deal found 3/3$679
This Iberia deal was found by Cheapflights users on 3/3. 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 4/14:30 pmORD - EAS
1 stop13h 30mIberia
Tue 4/89:30 pmEAS - ORD
1 stop23h 45mIberia
Deal found 3/3$713
This American Airlines deal was found by Cheapflights users on 3/3. 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 4/178:27 amORD - EAS
2 stops17h 13mAmerican Airlines
Thu 4/249:20 amEAS - ORD
1 stop11h 55mAmerican Airlines
Deal found 3/3$968
This Flysmarter deal was found by Cheapflights users on 3/4. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/182:35 pmORD - EAS
2 stops35h 05mAvianca
Fri 4/259:30 pmEAS - ORD
2 stops22h 45mAvianca
Deal found 3/4$1,516

Find flights from Chicago to San Sebastian within your budget

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 March 4, 2025.

Fly from

Chicago

Fly to

San Sebastian

Route

Depart

Return

Price

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 4/1

2:05 pm-5:20 pm

2 stops20h 15m

San Sebastián

Tue 4/8

1:30 pm-12:55 pm

2 stops30h 25m

$679

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Tue 4/1

4:30 pm-1:00 pm

1 stop13h 30m

San Sebastián

Tue 4/8

9:30 pm-2:15 pm

1 stop23h 45m

$713

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Thu 4/17

8:27 am-8:40 am

2 stops17h 13m

San Sebastián

Thu 4/24

9:20 am-2:15 pm

1 stop11h 55m

$968

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Fri 4/18

2:35 pm-8:40 am

2 stops35h 05m

San Sebastián

Fri 4/25

9:30 pm-1:15 pm

2 stops22h 45m

$1,516

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Fri 4/18

11:25 am-8:50 am

3 stops38h 25m

$530

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Thu 4/17

2:35 pm-8:50 pm

2 stops23h 15m

$663

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Thu 4/17

4:30 pm-8:50 pm

1 stop21h 20m

$715

ChicagoSan Sebastian

ORD - EAS

ORDEAS

Chicago O'Hare Intl

Fri 4/18

10:10 pm-8:40 am

1 stop27h 30m

$725

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/4

  • Most accurate provider: When it comes to deals on Chicago-San Sebastian flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Chicago-San Sebastian flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Chicago-San Sebastian flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-San Sebastian flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago-San Sebastian flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Travel insights for flights from Chicago to San Sebastian

Get recent, data-driven insights about flights from Chicago to San Sebastian including ideal travel times, pricing trends, and more.
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 March 4, 2025.
American Airlines
7.2
Good
10,000 reviews

Comfort

7.3

Boarding

7.5

Food

6.5

Entertainment

7.0

Crew

8.0

Overall

7.2

Reviews

1 / 20

10.0
Excellent

Anonymous,Jan 2025

PIT - DFW

Due to gate changes,we nearly missed our flight. The gate agent reassigned our seats and would NOT give us our assigned seats,but she did honor that same request to the man who arrived after us. Her rudeness and difficulty was not appropriate.

American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Comfort

7.3

Boarding

7.5

Food

6.5

Entertainment

7.0

Crew

8.0

Overall

7.2

Reviews

1 / 20

10.0
Excellent

Anonymous,Jan 2025

PIT - DFW

Due to gate changes,we nearly missed our flight. The gate agent reassigned our seats and would NOT give us our assigned seats,but she did honor that same request to the man who arrived after us. Her rudeness and difficulty was not appropriate.

Iberia
7.0
Good
2,641 reviews
American Airlines
7.2
Good
10,000 reviews

Comfort

7.3

Boarding

7.5

Food

6.5

Entertainment

7.0

Crew

8.0

Overall

7.2

Reviews

1 / 20

10.0
Excellent

Anonymous,Jan 2025

PIT - DFW

Due to gate changes,we nearly missed our flight. The gate agent reassigned our seats and would NOT give us our assigned seats,but she did honor that same request to the man who arrived after us. Her rudeness and difficulty was not appropriate.

Avianca
6.8
Okay
2,344 reviews
American Airlines
7.2
Good
10,000 reviews

Comfort

7.3

Boarding

7.5

Food

6.5

Entertainment

7.0

Crew

8.0

Overall

7.2

Reviews

1 / 20

10.0
Excellent

Anonymous,Jan 2025

PIT - DFW

Due to gate changes,we nearly missed our flight. The gate agent reassigned our seats and would NOT give us our assigned seats,but she did honor that same request to the man who arrived after us. Her rudeness and difficulty was not appropriate.

British Airways
6.6
Okay
6,740 reviews
American Airlines
7.2
Good
10,000 reviews

Comfort

7.3

Boarding

7.5

Food

6.5

Entertainment

7.0

Crew

8.0

Overall

7.2

Reviews

1 / 20

10.0
Excellent

Anonymous,Jan 2025

PIT - DFW

Due to gate changes,we nearly missed our flight. The gate agent reassigned our seats and would NOT give us our assigned seats,but she did honor that same request to the man who arrived after us. Her rudeness and difficulty was not appropriate.

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 $713. Additional round-trip tickets that might be worth considering are offered by American Airlines and British Airways, with the lowest prices starting at $1,032 and $1,353, respectively. Iberia is priced at 35% 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.

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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
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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 March 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$689Average$1,134FlexibilityNo cancel feeOn-time77%
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