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$682+ 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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIO
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
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 April 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$922
(United)

One-way from

$682
(Iberia)

Popular in

November

Cheapest in

February

Average price

$878
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. 14% potential increase in price ($174 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($51 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 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 April 2, 2025.

This United Airlines deal was found by Cheapflights users on 4/1. 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 11/207:00 amONT - BIO
2 stops20h 50mUnited Airlines
Fri 11/287:20 amBIO - ONT
2 stops21h 57mUnited Airlines
Deal found 4/1$777
This Iberia deal was found by Cheapflights users on 4/1. 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.
Fri 8/12:39 pmONT - BIO
2 stops17h 16mIberia
Mon 8/251:30 pmBIO - ONT
2 stops18h 59mIberia
Deal found 4/1$931
This Priceline deal was found by Cheapflights users on 3/31. 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 6/138:15 amONT - BIO
2 stops19h 30mMultiple Airlines
Sun 6/221:30 pmBIO - ONT
2 stops19h 29mMultiple Airlines
Deal found 3/31$3,867

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 April 2, 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

Fri 5/16

5:05 am-11:25 pm

2 stops33h 20m

Bilbao

Tue 5/20

6:45 am-8:34 pm

2 stops22h 49m

$922

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Fri 8/1

2:39 pm-4:55 pm

2 stops17h 16m

Bilbao

Mon 8/25

1:30 pm-11:29 pm

2 stops18h 59m

$931

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Fri 6/13

8:15 am-12:45 pm

2 stops19h 30m

Bilbao

Sun 6/22

1:30 pm-11:59 pm

2 stops19h 29m

$3,867

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Fri 8/22

2:59 pm-4:55 pm

2 stops16h 56m

$682

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Sat 6/14

11:45 pm-11:05 am

2 stops26h 20m

$1,061

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Sun 4/6

7:00 am-4:00 pm

2 stops24h 00m

$1,437

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

Fri 8/22

10:00 am-6:25 pm

3 stops23h 25m

$3,375

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

  • 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 $541). Flying from Ontario to Bilbao in June is currently the most expensive (average of $1,178). 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.

Rainfall in Bilbao by month

Plan your trip to Bilbao by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Bilbao ranges from 2.4 - 5.6 inches per month. November is typically the wettest month, when rainfall can reach 5.6 in. July is typically the driest time to visit Bilbao when rainfall is around 2.4 in.

Temperature in Bilbao by month

Plan your trip to Bilbao by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Bilbao, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

Reviews of airlines servicing Bilbao

Get insights into the airlines that provide service to Bilbao. 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 Bilbao. Reviews last updated April 2, 2025.
Delta
8.0
Very good
7,897 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,897 reviews
Delta
8.0
Very good
7,897 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,615 reviews
Delta
8.0
Very good
7,897 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Iberia
7.0
Good
2,657 reviews
Delta
8.0
Very good
7,897 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines to fly from Ontario to Bilbao one-way?

    One-way options have recently been found by users for as low as $682 on Iberia. Other airlines that offer cheap prices include Delta from $1,437 and United Airlines from $3,375 one-way.

  • 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 $541). Flying from Ontario to Bilbao in June is currently the most expensive (average of $1,178). 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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