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Bilbao

$426+ 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 6/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIO
feb. 25 — mar. 41
mié. 2/25
mié. 3/4
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 enero 26, 2026.

This United Airlines deal was found by Cheapflights users on 1/25. 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.
mar. 4/71:34 pm
ONT
-
BIO
2 stops18h 36m
United Airlines
mié. 4/2911:55 am
BIO
-
ONT
2 stops19h 50m
United Airlines
Deal found 1/25$647
This United Airlines deal was found by Cheapflights users on 1/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/35:05 am
ONT
-
BIO
2 stops31h 50m
United Airlines
sáb. 2/1412:50 pm
BIO
-
ONT
2 stops43h 07m
United Airlines
Deal found 1/26$708
This United Airlines deal was found by Cheapflights users on 1/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/126:00 am
ONT
-
BIO
2 stops31h 55m
United Airlines
jue. 3/197:40 am
BIO
-
ONT
2 stops21h 10m
United Airlines
Deal found 1/26$889
This Iberia deal was found by Cheapflights users on 1/25. 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.
dom. 5/102:08 pm
ONT
-
BIO
2 stops21h 42m
Iberia
mié. 5/271:30 pm
BIO
-
ONT
2 stops19h 29m
Iberia
Deal found 1/25$942
This United Airlines deal was found by Cheapflights users on 1/25. 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.
vie. 5/1510:37 am
ONT
-
BIO
2 stops22h 18m
United Airlines
lun. 5/256:50 am
BIO
-
ONT
2 stops22h 27m
United Airlines
Deal found 1/25$1,019
This United Airlines deal was found by Cheapflights users on 1/25. 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.
sáb. 5/1610:43 am
ONT
-
BIO
2 stops17h 42m
United Airlines
mar. 5/266:50 am
BIO
-
ONT
2 stops25h 16m
United Airlines
Deal found 1/25$1,041
This United Airlines deal was found by Cheapflights users on 1/25. 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.
sáb. 5/1610:43 am
ONT
-
BIO
2 stops22h 12m
United Airlines
sáb. 5/3011:55 am
BIO
-
ONT
2 stops20h 11m
United Airlines
Deal found 1/25$1,126
This United Airlines deal was found by Cheapflights users on 1/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/1610:43 am
ONT
-
BIO
2 stops17h 42m
United Airlines
sáb. 6/132:00 pm
BIO
-
ONT
2 stops18h 06m
United Airlines
Deal found 1/26$1,132
This United Airlines deal was found by Cheapflights users on 1/25. 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.
lun. 5/1110:37 am
ONT
-
BIO
2 stops22h 18m
United Airlines
lun. 5/256:50 am
BIO
-
ONT
2 stops22h 27m
United Airlines
Deal found 1/25$1,147
This oojo deal was found by Cheapflights users on 1/25. 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.
mié. 5/132:08 pm
ONT
-
BIO
2 stops18h 42m
Iberia
mié. 5/271:30 pm
BIO
-
ONT
2 stops19h 29m
Iberia
Deal found 1/25$1,184
This Iberia deal was found by Cheapflights users on 1/25. 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.
sáb. 5/162:08 pm
ONT
-
BIO
2 stops24h 07m
Iberia
vie. 5/299:15 am
BIO
-
ONT
2 stops23h 44m
Iberia
Deal found 1/25$1,212
This Iberia deal was found by Cheapflights users on 1/26. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 7/510:25 am
ONT
-
BIO
2 stops25h 25m
Iberia
mar. 7/146:45 am
BIO
-
ONT
2 stops26h 14m
Iberia
Deal found 1/26$1,253

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 enero 26, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$647
(United Airlines)

One-way from

$426
(Finnair)

Popular in

December

Cheapest in

January

Average price

$638
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. 10% potential increase in price ($100 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 enero 26, 2026.
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

mar. 4/7

1:34 pm-5:10 pm

2 stops18h 36m

Bilbao

mié. 4/29

11:55 am-10:45 pm

2 stops19h 50m

$647

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

jue. 3/12

6:00 am-9:55 pm

2 stops31h 55m

Bilbao

jue. 3/19

7:40 am-8:50 pm

2 stops21h 10m

$889

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

dom. 5/10

2:08 pm-8:50 pm

2 stops21h 42m

Bilbao

mié. 5/27

1:30 pm-11:59 pm

2 stops19h 29m

$942

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

vie. 5/15

10:37 am-5:55 pm

2 stops22h 18m

Bilbao

lun. 5/25

6:50 am-8:17 pm

2 stops22h 27m

$1,019

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

sáb. 5/16

10:43 am-1:25 pm

2 stops17h 42m

Bilbao

mar. 5/26

6:50 am-11:06 pm

2 stops25h 16m

$1,041

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

sáb. 5/16

10:43 am-5:55 pm

2 stops22h 12m

Bilbao

sáb. 5/30

11:55 am-11:06 pm

2 stops20h 11m

$1,126

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

sáb. 5/16

10:43 am-1:25 pm

2 stops17h 42m

Bilbao

sáb. 6/13

2:00 pm-11:06 pm

2 stops18h 06m

$1,132

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

lun. 5/11

10:37 am-5:55 pm

2 stops22h 18m

Bilbao

lun. 5/25

6:50 am-8:17 pm

2 stops22h 27m

$1,147

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

sáb. 5/16

2:08 pm-11:15 pm

2 stops24h 07m

Bilbao

vie. 5/29

9:15 am-11:59 pm

2 stops23h 44m

$1,212

OntarioBilbao

ONT - BIO

ONTBIO

Ontario

dom. 7/5

10:25 am-8:50 pm

2 stops25h 25m

Bilbao

mar. 7/14

6:45 am-11:59 pm

2 stops26h 14m

$1,253

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

Showing 1-10 of 24 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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Ontario-Bilbao flight deals on Cheapflights vs. Ovago 90-95% 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 Ovago the most. Ovago 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 $505). 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 $647, United Airlines can have you in Bilbao from Ontario in 18h 36m. 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 $505). 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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