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$499+ Cheap flights from Ontario (ONT) to Bilbao (BIO)

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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIO
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Cheap flight deals from Ontario to Bilbao

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Bilbao (BIO). 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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$788
(Air France)

One-way from

$499
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$784
Provider with most accurate pricing for Ontario-Bilbao flight deals.
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Provider most trusted by Cheapflights users for Ontario-Bilbao flights.
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From Ontario to Bilbao
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One-way flight from Ontario to Bilbao
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Highest demand for flights based on searches. 22% potential increase in price ($281 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($74 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Ontario to Bilbao

Cheapest flights from Ontario to Bilbao
Explore the most affordable flight options available from Ontario to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/46:38 pmONT - BIO
2 stops18h 17mUnited Airlines
Mon 11/106:45 amBIO - ONT
2 stops19h 49mUnited Airlines
Deal found 10/27$682
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:00 amONT - BIO
2 stops32h 20mUnited Airlines
Fri 12/196:45 amBIO - ONT
2 stops24h 40mUnited Airlines
Deal found 10/28$1,422
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/265:05 amONT - BIO
2 stops33h 15mUnited Airlines
Sun 1/46:45 amBIO - ONT
2 stops48h 40mUnited Airlines
Deal found 10/28$1,507
This Delta deal was found by Cheapflights users on 10/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/275:49 pmONT - BIO
2 stops37h 41mDelta
Sat 1/311:55 amBIO - ONT
2 stops44h 59mDelta
Deal found 10/28$2,001
This Delta deal was found by Cheapflights users on 10/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:38 amONT - BIO
2 stops43h 42mDelta
Sat 1/311:55 amBIO - ONT
2 stops44h 59mDelta
Deal found 10/28$2,042
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:59 pmONT - BIO
2 stops33h 06mUnited Airlines
Sun 1/46:45 amBIO - ONT
2 stops38h 53mUnited Airlines
Deal found 10/28$2,442
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Wed 10/296:10 amONT - BIO
2 stops42h 20mMultiple Airlines
Tue 11/119:15 amBIO - ONT
2 stops22h 14mMultiple Airlines
Deal found 10/28$3,245
This KLM deal was found by Cheapflights users on 10/26. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/269:50 amONT - BIO
2 stops17h 40mMultiple Airlines
Sun 11/27:25 amBIO - ONT
2 stops17h 28mMultiple Airlines
Deal found 10/26$9,510

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Bilbao 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 October 28, 2025.
Use the filters below to find and compare flights from Ontario to Bilbao that are best for you.

Fly from

Ontario

Fly to

Bilbao

Route

Depart

Return

Price

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Wed 3/4

6:00 am-11:30 am

2 stops20h 30m

Bilbao

Sun 3/8

6:05 pm-9:14 pm

2 stops59h 09m

$788

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Fri 3/27

5:40 am-11:20 pm

2 stops33h 40m

Bilbao

Tue 3/31

6:45 am-10:26 pm

2 stops24h 41m

$981

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Fri 12/12

6:00 am-11:20 pm

2 stops32h 20m

Bilbao

Fri 12/19

6:45 am-10:25 pm

2 stops24h 40m

$1,422

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Fri 12/26

5:05 am-11:20 pm

2 stops33h 15m

Bilbao

Sun 1/4

6:45 am-10:25 pm

2 stops48h 40m

$1,507

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Sat 12/27

5:49 pm-4:30 pm

2 stops37h 41m

Bilbao

Sat 1/3

11:55 am-11:54 pm

2 stops44h 59m

$2,001

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Fri 12/26

6:38 am-11:20 am

2 stops43h 42m

Bilbao

Sat 1/3

11:55 am-11:54 pm

2 stops44h 59m

$2,042

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Sat 12/27

11:59 pm-6:05 pm

2 stops33h 06m

Bilbao

Sun 1/4

6:45 am-12:38 pm

2 stops38h 53m

$2,442

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Tue 11/11

6:38 pm-9:55 pm

2 stops18h 17m

$499

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Tue 11/11

7:00 am-8:30 am

2 stops16h 30m

$3,834

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

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

Have a flexible travel schedule? Discover the best time to fly to Bilbao 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 Bilbao

What is the cheapest month to book a flight from Ontario to Bilbao?

Currently, January is the cheapest month in which you can book a flight from Ontario to Bilbao (average of $525). Flying from Ontario to Bilbao in June is currently the most expensive (average of $1,005). 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 Bilbao. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Bilbao?

    For as low as $788, Air France can have you in Bilbao from Ontario in 20h 30m. There are 5689 mi between Ontario and Bilbao. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

  • How can I find direct flights from Ontario to Bilbao?

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

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

    Yes. Cheapflights offers flight deals from Ontario to Bilbao 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 Ontario to Bilbao?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Bilbao (average of $525). Flying from Ontario to Bilbao in June is currently the most expensive (average of $1,005). 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.

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