$470 Cheap Flights from Bilbao (BIO) to Ontario (ONT)

View $470 flight on Mon, Feb 23, 2026Opens in a new window

Popular airlines from Bilbao Airport (BIO) to Los Angeles - Ontario Intl. Airport (ONT)

Cheap Flights from Bilbao to Ontario (BIO-ONT)

Prices were available within the past 7 days and start at $470 for one-way flights and $824 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, Feb 23 - Sat, Mar 7
BIO
Bilbao
ONT
Ontario
$824 Roundtrip, found 3 days ago
$824
Roundtrip
found 3 days ago
Select American Airlines flight, departing Mon, Feb 23 from Bilbao to Ontario, returning Sat, Mar 7, priced at $824 found 3 days ago
Iberia
Mon, Feb 23 - Sat, Mar 7
BIO
Bilbao
ONT
Ontario
$934 Roundtrip, found 3 days ago
$934
Roundtrip
found 3 days ago
Select Iberia flight, departing Mon, Feb 23 from Bilbao to Ontario, returning Sat, Mar 7, priced at $934 found 3 days ago
Iberia
Mon, Feb 23 - Sat, Mar 7
BIO
Bilbao
ONT
Ontario
$1,092 Roundtrip, found 3 days ago
$1,092
Roundtrip
found 3 days ago
Select Iberia flight, departing Mon, Feb 23 from Bilbao to Ontario, returning Sat, Mar 7, priced at $1,092 found 3 days ago
American Airlines
Mon, Feb 23 - Sat, Mar 7
BIO
Bilbao
ONT
Ontario
$1,104 Roundtrip, found 3 days ago
$1,104
Roundtrip
found 3 days ago
Select American Airlines flight, departing Mon, Feb 23 from Bilbao to Ontario, returning Sat, Mar 7, priced at $1,104 found 3 days ago
Iberia
Mon, Feb 23 - Sat, Mar 7
BIO
Bilbao
ONT
Ontario
$1,284 Roundtrip, found 3 days ago
$1,284
Roundtrip
found 3 days ago
Select Iberia flight, departing Mon, Feb 23 from Bilbao to Ontario, returning Sat, Mar 7, priced at $1,284 found 3 days ago
Lufthansa
Thu, Apr 30 - Sat, Jun 13
BIO
Bilbao
ONT
Ontario
$1,398 Roundtrip, found 4 days ago
$1,398
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Thu, Apr 30 from Bilbao to Ontario, returning Sat, Jun 13, priced at $1,398 found 4 days ago
Iberia
Mon, Feb 23 - Sat, Mar 7
BIO
Bilbao
ONT
Ontario
$1,401 Roundtrip, found 3 days ago
$1,401
Roundtrip
found 3 days ago
Select Iberia flight, departing Mon, Feb 23 from Bilbao to Ontario, returning Sat, Mar 7, priced at $1,401 found 3 days ago
American Airlines
Mon, Feb 23 - Sat, Mar 7
BIO
Bilbao
ONT
Ontario
$1,413 Roundtrip, found 3 days ago
$1,413
Roundtrip
found 3 days ago
Select American Airlines flight, departing Mon, Feb 23 from Bilbao to Ontario, returning Sat, Mar 7, priced at $1,413 found 3 days ago
Lufthansa
Thu, Apr 30 - Sat, Jun 13
BIO
Bilbao
ONT
Ontario
$1,538 Roundtrip, found 4 days ago
$1,538
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Thu, Apr 30 from Bilbao to Ontario, returning Sat, Jun 13, priced at $1,538 found 4 days ago
American Airlines
Thu, Apr 30 - Sat, Jun 13
BIO
Bilbao
ONT
Ontario
$1,669 Roundtrip, found 4 days ago
$1,669
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, Apr 30 from Bilbao to Ontario, returning Sat, Jun 13, priced at $1,669 found 4 days ago
Flights from Bilbao (BIO) to Ontario (ONT)
Origin airport
Bilbao
Destination airport
Los Angeles - Ontario Intl.
Roundtrip price
$823
Distance
5692 mi

Bilbao to Ontario Flights

The cheapest times to fly from Bilbao to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Bilbao to Ontario are during the month of February. You can find some of the cheapest flights from Bilbao to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Bilbao to Ontario

Sunday is one of the best days to book for cheap flights from Bilbao to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Bilbao to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Bilbao to Ontario in 2026. You can also book with separate airlines for your outbound and return journeys, from $470 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Bilbao to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Bilbao to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Bilbao Airport (BIO) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Get a cheap one-way flight from $470 or cheap return flight from $824 from Bilbao Airport (BIO) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Bilbao Airport (BIO) to Los Angeles - Ontario Intl. Airport (ONT)?
February is the cheapest month to fly from BIO to ONT. Planning your trip for the off-season is often the key to finding better fares.
What is the cheapest airline that flies from Bilbao Airport (BIO) to Los Angeles - Ontario Intl. Airport (ONT)?
To find the cheapest airline that'll fly you from BIO to ONT, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Bilbao Airport (BIO) to Los Angeles - Ontario Intl. Airport (ONT)?
Nonstop flights from Bilbao Airport (BIO) to Los Angeles - Ontario Intl. Airport (ONT) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BIO to ONT?
Generally you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* However, this can vary based on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Bilbao Airport (BIO) to Los Angeles - Ontario Intl. Airport (ONT)?
Choose a flight from Bilbao Airport (BIO) to Los Angeles - Ontario Intl. Airport (ONT) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Bilbao Airport (BIO) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Last-minute bookings from BIO to ONT are usually more expensive. To lock in the lowest prices, start looking for flights ahead of time. That being said, if you're flexible with your travel plans, you may land a cheap ticket right before you leave.
Is it cheaper to book a BIO to ONT flight and hotel package?
Opting for a BIO to ONT flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Choose from our extensive range of hotels and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Bilbao Airport (BIO) to Los Angeles - Ontario Intl. Airport (ONT)?
In most cases, you can modify or cancel your BIO to ONT flight. However, there may be additional charges, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you want more details, go to our Customer Service portal.

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*Available to One Key members.