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San Sebastian

$663+ Cheap flights from Ontario (ONT) 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — EAS
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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Cheap flight deals from Ontario to San Sebastian

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) 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 April 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
2 stars

Round-trip from

$1,966
(American Airlines)

One-way from

$663
(Iberia)

Popular in

November

Cheapest in

October

Average price

$1,195
Provider with most accurate pricing for Ontario-San Sebastián flight deals.
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Provider most trusted by Cheapflights users for Ontario-San Sebastián flights.
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From Ontario to San Sebastián
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One-way flight from Ontario to San Sebastián
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Highest demand for flights based on searches. 5% potential increase in price ($74 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($62 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Ontario to San Sebastian

Cheapest flights from Ontario to San Sebastian
Explore the most affordable flight options available from Ontario to San Sebastian. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This American Airlines deal was found by Cheapflights users on 4/17. 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.
Sun 5/1110:53 amONT - EAS
2 stops17h 07mAmerican Airlines
Sat 5/179:20 amEAS - ONT
2 stops18h 16mAmerican Airlines
Deal found 4/17$1,966
This Priceline deal was found by Cheapflights users on 4/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/410:54 amONT - EAS
2 stops36h 46mIberia
Sun 7/139:30 pmEAS - ONT
2 stops34h 28mIberia
Deal found 4/16$3,144
This American Airlines deal was found by Cheapflights users on 4/17. 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.
Sat 7/510:53 amONT - EAS
2 stops24h 57mMultiple Airlines
Tue 7/151:40 pmEAS - ONT
2 stops18h 18mMultiple Airlines
Deal found 4/17$3,565

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario 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 April 17, 2025.
Use the filters below to find and compare flights from Ontario to San Sebastian that are best for you.

Fly from

Ontario

Fly to

San Sebastian

Route

Depart

Return

Price

OntarioSan Sebastian

ONT - EAS

ONTEAS

Ontario

Sun 5/11

10:53 am-1:00 pm

2 stops17h 07m

San Sebastián

Sat 5/17

9:20 am-6:36 pm

2 stops18h 16m

$1,966

OntarioSan Sebastian

ONT - EAS

ONTEAS

Ontario

Fri 7/4

10:54 am-8:40 am

2 stops36h 46m

San Sebastián

Sun 7/13

9:30 pm-10:58 pm

2 stops34h 28m

$3,144

OntarioSan Sebastian

ONT - EAS

ONTEAS

Ontario

Sat 7/5

10:53 am-8:50 pm

2 stops24h 57m

San Sebastián

Tue 7/15

1:40 pm-10:58 pm

2 stops18h 18m

$3,565

OntarioSan Sebastian

ONT - EAS

ONTEAS

Ontario

Tue 9/2

12:46 pm-8:50 pm

2 stops23h 04m

$663

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

  • Most accurate provider: When it comes to deals on Ontario-San Sebastian flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-San Sebastian flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-San Sebastian flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-San Sebastian flights, Cheapflights users trust FlightHub the most. FlightHub 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 Ontario-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 Ontario to San Sebastian

Have a flexible travel schedule? Discover the best time to fly to San Sebastian from Ontario 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.

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 April 17, 2025.
American Airlines
7.2
Good
10,000 reviews

Food

6.5

Comfort

7.2

Entertainment

6.9

Boarding

7.5

Overall

7.2

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Apr 2025

MYR - CLT

This flight was impacted by a nearly 4, yes 4 hour delay. They replaced a 777 with another one and it had to be cleaned and catered before we could depart. Great crew did it without complaint.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Food

6.5

Comfort

7.2

Entertainment

6.9

Boarding

7.5

Overall

7.2

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Apr 2025

MYR - CLT

This flight was impacted by a nearly 4, yes 4 hour delay. They replaced a 777 with another one and it had to be cleaned and catered before we could depart. Great crew did it without complaint.
Iberia
7.0
Good
2,676 reviews
American Airlines
7.2
Good
10,000 reviews

Food

6.5

Comfort

7.2

Entertainment

6.9

Boarding

7.5

Overall

7.2

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Apr 2025

MYR - CLT

This flight was impacted by a nearly 4, yes 4 hour delay. They replaced a 777 with another one and it had to be cleaned and catered before we could depart. Great crew did it without complaint.

Related info for your journey

Find useful and relevant information for your journey from Ontario to San Sebastian. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario 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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