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Cheap flights from Ontario to San Sebastian from C$ 750

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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — EAS
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to San Sebastian

Keep the following information in mind while searching for Ontario to San Sebastian flight deals. Data was last updated 30 October 2025.

Round-trip from

C$ 1,047

One-way from

C$ 750
American Airlines
  • American Airlines
  • 29/3-2/4
  • 4 total stops
  • 39h 25m total
  • Ontario to San Sebastian
Search Deals
12/12
  • 12/12
  • 3 total stops
  • 21h 40m total
  • Ontario to San Sebastian
Search Deals

Find flight deals from Ontario to San Sebastian

Enter your travel dates to find the best prices.

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 30 October 2025.

Sun 7/127:14 a.m.YUL - EAS
2 stops19h 26mAmerican Airlines
Sun 14/121:40 p.m.EAS - YUL
2 stops39h 00mAmerican Airlines
Deal found 28/10C$ 1,113
Sat 6/123:45 p.m.YUL - EAS
2 stops47h 05mAmerican Airlines
Sun 14/121:40 p.m.EAS - YUL
2 stops39h 00mAmerican Airlines
Deal found 28/10C$ 1,145
Sun 7/127:14 a.m.YUL - EAS
2 stops19h 26mAmerican Airlines
Sat 13/129:30 p.m.EAS - YUL
2 stops31h 12mAmerican Airlines
Deal found 28/10C$ 1,172
Sat 6/122:29 p.m.YUL - EAS
2 stops36h 11mAmerican Airlines
Sat 13/129:30 p.m.EAS - YUL
2 stops31h 12mAmerican Airlines
Deal found 28/10C$ 1,204
Sat 6/127:14 a.m.YUL - EAS
2 stops19h 26mAmerican Airlines
Fri 12/129:20 a.m.EAS - YUL
2 stops19h 39mAmerican Airlines
Deal found 28/10C$ 1,218
Sun 7/129:40 p.m.YUL - EAS
3 stops33h 50mMultiple Airlines
Sat 13/122:05 p.m.EAS - YUL
3 stops40h 38mMultiple Airlines
Deal found 28/10C$ 1,289
Sun 7/126:45 p.m.YUL - EAS
1 stop12h 15mMultiple Airlines
Sun 14/129:30 p.m.EAS - YUL
2 stops20h 15mMultiple Airlines
Deal found 28/10C$ 1,427
Sat 6/124:45 p.m.YUL - EAS
2 stops14h 15mMultiple Airlines
Fri 12/129:20 a.m.EAS - YUL
1 stop12h 25mMultiple Airlines
Deal found 28/10C$ 1,571
Sun 7/126:45 p.m.YUL - EAS
1 stop12h 15mMultiple Airlines
Fri 12/129:20 a.m.EAS - YUL
1 stop12h 25mMultiple Airlines
Deal found 28/10C$ 1,604
Mon 3/1111:32 a.m.YYZ - EAS
2 stops19h 28mAmerican Airlines
Fri 7/119:20 a.m.EAS - YYZ
2 stops18h 09mAmerican Airlines
Deal found 29/10C$ 2,430

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 629,999 searches. Data last updated 30 October 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

TorontoSan Sebastian

YYZ - EAS

YYZEAS

Toronto Pearson Intl

Sun 29/3

7:00 a.m.-8:40 a.m.

2 stops19h 40m

San Sebastián

Thu 2/4

9:20 a.m.-11:45 a.m.

2 stops32h 25m

C$ 1,046

MontrealSan Sebastian

YUL - EAS

YULEAS

Montreal Pierre Elliott Trudeau Intl

Sun 7/12

7:14 a.m.-8:40 a.m.

2 stops19h 26m

San Sebastián

Sun 14/12

1:40 p.m.-10:40 p.m.

2 stops39h 00m

C$ 1,113

MontrealSan Sebastian

YUL - EAS

YULEAS

Montreal Pierre Elliott Trudeau Intl

Sat 6/12

3:45 p.m.-8:50 p.m.

2 stops47h 05m

San Sebastián

Sun 14/12

1:40 p.m.-10:40 p.m.

2 stops39h 00m

C$ 1,145

MontrealSan Sebastian

YUL - EAS

YULEAS

Montreal Pierre Elliott Trudeau Intl

Sun 7/12

7:14 a.m.-8:40 a.m.

2 stops19h 26m

San Sebastián

Sat 13/12

9:30 p.m.-10:42 p.m.

2 stops31h 12m

C$ 1,172

MontrealSan Sebastian

YUL - EAS

YULEAS

Montreal Pierre Elliott Trudeau Intl

Mon 8/12

12:59 p.m.-1:00 p.m.

2 stops18h 01m

San Sebastián

Sat 13/12

9:30 p.m.-10:59 p.m.

2 stops31h 29m

C$ 1,172

MontrealSan Sebastian

YUL - EAS

YULEAS

Montreal Pierre Elliott Trudeau Intl

Sat 6/12

2:29 p.m.-8:40 a.m.

2 stops36h 11m

San Sebastián

Sat 13/12

9:30 p.m.-10:42 p.m.

2 stops31h 12m

C$ 1,204

MontrealSan Sebastian

YUL - EAS

YULEAS

Montreal Pierre Elliott Trudeau Intl

Sat 6/12

7:14 a.m.-8:40 a.m.

2 stops19h 26m

San Sebastián

Fri 12/12

9:20 a.m.-10:59 p.m.

2 stops19h 39m

C$ 1,218

MontrealSan Sebastian

YUL - EAS

YULEAS

Montreal Pierre Elliott Trudeau Intl

Sat 11/4

9:30 p.m.-8:20 a.m.

3 stops28h 50m

San Sebastián

Sat 18/4

5:55 p.m.-9:10 p.m.

2 stops33h 15m

C$ 1,233

MontrealSan Sebastian

YUL - EAS

YULEAS

Montreal Pierre Elliott Trudeau Intl

Sun 7/12

6:45 p.m.-1:00 p.m.

1 stop12h 15m

San Sebastián

Sun 14/12

9:30 p.m.-11:45 a.m.

2 stops20h 15m

C$ 1,427

MontrealSan Sebastian

YUL - EAS

YULEAS

Montreal Pierre Elliott Trudeau Intl

Fri 12/12

5:10 p.m.-8:50 p.m.

3 stops21h 40m

C$ 750

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to San Sebastian

What is the cheapest month to book a flight from Region of Ontario to San Sebastian?

Currently, March is the cheapest month in which you can book a flight from Region of Ontario to San Sebastian (average of C$ 835). Flying from Region of Ontario to San Sebastian in August is currently the most expensive (average of C$ 1,089). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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.

  • What airport do you fly into for flights to San Sebastian from Ontario?

    For a flight from Ontario to San Sebastian, you will be flying into San Sebastián. San Sebastián (EAS) is just 15.7 km from the centre of the city.

  • How long is the flight from Region of Ontario to San Sebastian?

    American Airlines can get you from Region of Ontario to San Sebastian in just under 19h 40m. Your travel time can differ by up to . The distance between Region of Ontario and San Sebastian is about 6022 km.

  • What are the most popular routes from Region of Ontario to San Sebastian?

    When deciding which route to take from Region of Ontario to San Sebastian consider Toronto Pearson Intl - San Sebastián, Montreal Pierre Elliott Trudeau Intl - San Sebastián or Toronto Island - San Sebastián as they are the most popular.

  • 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.

  • What is the cheapest month to book a flight from Region of Ontario to San Sebastian?

    Currently, March is the cheapest month in which you can book a flight from Region of Ontario to San Sebastian (average of C$ 835). Flying from Region of Ontario to San Sebastian in August is currently the most expensive (average of C$ 1,089). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Sebastian?

Book flights to San Sebastian if you plan to visit one of these locations
Hondarribia

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