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Bilbao

$374+ 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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIO
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap 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 December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/251:40 pmONT - BIO
2 stops48h 40mUnited Airlines
Sat 1/1012:50 pmBIO - ONT
2 stops43h 03mUnited Airlines
Deal found 12/10$1,276
This United Airlines deal was found by Cheapflights users on 12/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:42 amONT - BIO
2 stops27h 23mUnited Airlines
Wed 12/3112:50 pmBIO - ONT
2 stops42h 35mUnited Airlines
Deal found 12/9$1,764
This oojo deal was found by Cheapflights users on 12/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:50 amONT - BIO
2 stops21h 05mIberia
Thu 1/19:15 amBIO - ONT
2 stops21h 59mIberia
Deal found 12/9$1,842
This oojo deal was found by Cheapflights users on 12/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2210:50 amONT - BIO
2 stops17h 00mIberia
Thu 1/19:15 amBIO - ONT
2 stops21h 59mIberia
Deal found 12/11$1,904
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/221:40 pmONT - BIO
2 stops42h 00mUnited Airlines
Tue 12/3011:35 amBIO - ONT
2 stops42h 32mUnited Airlines
Deal found 12/10$2,155
This Iberia deal was found by Cheapflights users on 12/10. 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.
Thu 12/257:10 amONT - BIO
2 stops16h 20mIberia
Mon 1/129:35 pmBIO - ONT
2 stops25h 43mIberia
Deal found 12/10$2,164
This oojo deal was found by Cheapflights users on 12/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2210:50 amONT - BIO
2 stops17h 00mIberia
Mon 12/299:15 amBIO - ONT
2 stops21h 59mIberia
Deal found 12/9$2,512
This oojo deal was found by Cheapflights users on 12/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/117:03 amONT - BIO
2 stops16h 27mIberia
Fri 1/99:15 amBIO - ONT
2 stops22h 33mIberia
Deal found 12/9$2,549
This oojo deal was found by Cheapflights users on 12/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2210:50 amONT - BIO
2 stops17h 00mIberia
Tue 12/309:15 amBIO - ONT
2 stops23h 31mIberia
Deal found 12/9$2,628
This oojo deal was found by Cheapflights users on 12/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:50 amONT - BIO
2 stops17h 00mIberia
Wed 1/75:35 pmBIO - ONT
2 stops29h 43mIberia
Deal found 12/10$2,841

Find 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$485
(Delta)

One-way from

$374
(Iberia)

Popular in

December

Cheapest in

January

Average price

$1,559
Provider with most accurate pricing for Ontario-Bilbao flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Bilbao flights.
Search Deals
From Ontario to Bilbao
Search Deals
One-way flight from Ontario to Bilbao
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($135 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($58 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 12, 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

Tue 1/20

7:30 am-11:30 am

2 stops19h 00m

Bilbao

Fri 1/30

6:50 am-10:51 pm

2 stops25h 01m

$485

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Wed 1/21

5:10 pm-11:30 am

2 stops33h 20m

Bilbao

Fri 1/30

6:50 am-10:51 pm

2 stops25h 01m

$485

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Wed 2/11

6:00 am-6:05 pm

2 stops27h 05m

Bilbao

Tue 2/17

6:45 am-5:41 pm

2 stops19h 56m

$486

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Tue 1/20

5:05 am-9:55 pm

2 stops31h 50m

Bilbao

Fri 1/30

12:50 pm-10:53 pm

2 stops19h 03m

$486

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Wed 1/21

1:24 pm-9:55 pm

2 stops47h 31m

Bilbao

Fri 1/30

6:45 am-10:53 pm

2 stops25h 08m

$486

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Wed 2/11

6:00 am-6:05 pm

2 stops27h 05m

Bilbao

Sun 2/15

12:45 pm-10:57 pm

2 stops19h 12m

$486

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Tue 1/20

1:24 pm-6:05 pm

2 stops43h 41m

Bilbao

Sun 2/1

6:45 am-11:18 am

2 stops37h 33m

$486

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Tue 2/10

1:53 pm-9:55 pm

2 stops23h 02m

Bilbao

Mon 2/16

7:25 am-5:41 pm

2 stops43h 16m

$488

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Tue 1/20

6:00 am-9:55 pm

2 stops30h 55m

Bilbao

Thu 1/29

7:40 am-10:53 pm

2 stops24h 13m

$488

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Tue 1/20

5:05 am-9:55 pm

2 stops31h 50m

Bilbao

Sat 1/31

7:25 am-5:51 pm

2 stops19h 26m

$488

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 21 results
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2
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  • 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 $485, Delta can have you in Bilbao from Ontario in 19h. 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.

See more FAQs

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