HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$456+ Cheap flights from Barcelona-El Prat (BCN) to Ontario (ONT)

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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
BCN — ONT
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Barcelona-El Prat to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find flight deals from Barcelona-El Prat to Ontario

Cheapest flights from Barcelona-El Prat to Ontario
Explore the most affordable flight options available from Barcelona-El Prat to Ontario. 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 10/28. 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.
Thu 11/139:55 amBCN - ONT
2 stops21h 56mUnited Airlines
Tue 12/166:00 amONT - BCN
2 stops18h 00mUnited Airlines
Deal found 10/28$470
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.
Wed 11/126:50 amBCN - ONT
2 stops19h 44mUnited Airlines
Tue 12/26:00 amONT - BCN
2 stops18h 00mUnited Airlines
Deal found 10/28$472
This Finnair 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1212:30 pmBCN - ONT
2 stops32h 23mMultiple Airlines
Sun 11/1611:59 pmONT - BCN
2 stops22h 06mMultiple Airlines
Deal found 10/27$481
This Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/119:15 amBCN - ONT
2 stops23h 40mIberia
Thu 1/810:58 amONT - BCN
1 stop12h 52mIberia
Deal found 10/28$532
This Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/119:15 amBCN - ONT
2 stops23h 40mIberia
Sat 1/1010:58 amONT - BCN
1 stop12h 52mIberia
Deal found 10/28$550
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.
Wed 11/199:55 amBCN - ONT
2 stops21h 56mUnited Airlines
Tue 12/166:00 amONT - BCN
2 stops18h 00mUnited Airlines
Deal found 10/28$627
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 11/1110:30 amBCN - ONT
2 stops21h 21mUnited Airlines
Sat 11/295:05 amONT - BCN
2 stops19h 30mUnited Airlines
Deal found 10/27$658
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/79:55 amBCN - ONT
2 stops21h 56mUnited Airlines
Fri 11/146:05 amONT - BCN
2 stops17h 55mUnited Airlines
Deal found 10/26$682
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Mon 11/310:30 amBCN - ONT
2 stops21h 21mUnited Airlines
Mon 11/106:05 amONT - BCN
2 stops17h 55mUnited Airlines
Deal found 10/25$692
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.
Mon 12/2211:00 amBCN - ONT
2 stops20h 25mUnited Airlines
Wed 12/315:05 amONT - BCN
2 stops19h 30mUnited Airlines
Deal found 10/28$780
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.
Wed 12/249:55 amBCN - ONT
2 stops40h 56mUnited Airlines
Tue 12/305:05 amONT - BCN
2 stops18h 55mUnited Airlines
Deal found 10/28$791

Cheap flight deals from Barcelona-El Prat to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Barcelona-El Prat (BCN) to Ontario (ONT). 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

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$472
(United Airlines)

One-way from

$456
(Finnair)

Popular in

July

Cheapest in

February

Average price

$639
Provider with most accurate pricing for Barcelona-El Prat-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Barcelona-El Prat-Ontario flights.
Search Deals
From Barcelona-El Prat to Ontario
Search Deals
One-way flight from Barcelona-El Prat to Ontario
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($127 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Barcelona-El Prat to Ontario 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 Barcelona-El Prat Airport to Ontario that are best for you.

Fly from

Barcelona-El Prat

Fly to

Ontario

Route

Depart

Return

Price

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Wed 11/12

6:50 am-5:34 pm

2 stops19h 44m

Ontario

Tue 12/2

6:00 am-9:00 am

2 stops18h 00m

$472

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Wed 2/25

1:50 pm-10:57 pm

2 stops18h 07m

Ontario

Wed 3/4

1:45 pm-3:40 pm

1 stop16h 55m

$472

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Tue 11/25

1:50 pm-10:51 pm

2 stops18h 01m

Ontario

Tue 12/2

6:00 am-9:00 am

2 stops18h 00m

$472

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 2/5

5:50 am-8:58 pm

2 stops24h 08m

Ontario

Tue 2/10

6:00 am-9:00 am

2 stops18h 00m

$472

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 11/13

9:55 am-10:51 pm

2 stops21h 56m

Ontario

Tue 12/16

6:00 am-9:00 am

2 stops18h 00m

$472

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Tue 11/18

1:50 pm-10:51 pm

2 stops18h 01m

Ontario

Tue 12/16

6:00 am-9:00 am

2 stops18h 00m

$472

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Sat 1/31

9:55 am-10:53 pm

2 stops21h 58m

Ontario

Sun 2/8

6:00 am-9:00 am

2 stops18h 00m

$472

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 11/27

6:50 am-5:34 pm

2 stops19h 44m

Ontario

Thu 12/4

6:00 am-9:00 am

2 stops18h 00m

$472

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Fri 1/30

1:50 pm-10:53 pm

2 stops18h 03m

Ontario

Sun 2/8

6:00 am-9:00 am

2 stops18h 00m

$472

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Wed 11/12

12:30 pm-11:53 am

2 stops32h 23m

Ontario

Sun 11/16

11:59 pm-7:05 am

2 stops22h 06m

$481

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 21 results
1
2
3
  • Most accurate provider: When it comes to deals on Barcelona-El Prat Airport-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Barcelona-El Prat Airport-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Barcelona-El Prat Airport-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Barcelona-El Prat Airport-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub 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 Barcelona-El Prat Airport-Ontario 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 Barcelona-El Prat to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Barcelona-El Prat 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 Barcelona-El Prat Airport to Ontario

What is the cheapest month to book a flight from Barcelona-El Prat Airport to Ontario?

Currently, December is the cheapest month in which you can book a flight from Barcelona-El Prat Airport to Ontario (average of $362). Flying from Barcelona-El Prat Airport to Ontario in July is currently the most expensive (average of $601). 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 Barcelona-El Prat to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Barcelona-El Prat?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Ontario from Barcelona-El Prat. Booking flights from Barcelona-El Prat to Ontario (ONT) should be relatively easy as there are 0 daily inbound flights from Barcelona-El Prat from 0 different airlines.

  • How long is the flight from Barcelona-El Prat Airport to Ontario?

    Departing from Barcelona-El Prat Airport to Ontario will take you 19h 44m. The distance between Barcelona-El Prat Airport and Ontario is about 5971 mi.

  • Can I find deals for flights from Barcelona-El Prat to Ontario that include hotel bookings?

    Yes. In addition to deals on Barcelona-El Prat to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Barcelona-El Prat to Ontario?

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

  • Can I find deals for business class flights from Barcelona-El Prat to Ontario?

    Yes. Cheapflights offers flight deals from Barcelona-El Prat to Ontario 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 Barcelona-El Prat Airport to Ontario?

    Currently, December is the cheapest month in which you can book a flight from Barcelona-El Prat Airport to Ontario (average of $362). Flying from Barcelona-El Prat Airport to Ontario in July is currently the most expensive (average of $601). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.