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$369+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
BCN — ONT
Apr 11 — Apr 181
Sat 4/11
Sat 4/18
1 adult, Economy
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Cheap 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 March 12, 2026.

This Delta deal was found by Cheapflights users on 3/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/711:10 am
BCN
-
ONT
2 stops33h 37m
Delta
Tue 4/142:20 pm
ONT
-
BCN
2 stops17h 50m
Delta
Deal found 3/9$744
This British Airways deal was found by Cheapflights users on 3/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:30 pm
BCN
-
ONT
1 stop17h 21m
British Airways
Tue 11/310:47 am
ONT
-
BCN
1 stop13h 03m
British Airways
Deal found 3/10$748
This Delta deal was found by Cheapflights users on 3/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/206:00 am
BCN
-
ONT
2 stops19h 12m
Delta
Thu 12/312:00 pm
ONT
-
BCN
2 stops17h 00m
Delta
Deal found 3/10$750
This KLM deal was found by Cheapflights users on 3/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2211:00 am
BCN
-
ONT
1 stop16h 36m
KLM
Thu 6/411:52 am
ONT
-
BCN
1 stop14h 18m
KLM
Deal found 3/9$752
This American Airlines deal was found by Cheapflights users on 3/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/206:40 am
BCN
-
ONT
2 stops20h 42m
American Airlines
Thu 12/310:47 am
ONT
-
BCN
2 stops17h 33m
American Airlines
Deal found 3/8$766
This Expedia deal was found by Cheapflights users on 3/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/110:45 am
BCN
-
ONT
1 stop15h 54m
British Airways
Sat 10/1710:57 am
ONT
-
BCN
1 stop14h 13m
British Airways
Deal found 3/11$770
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Fri 4/38:00 am
BCN
-
ONT
2 stops21h 36m
United Airlines
Sat 4/187:00 am
ONT
-
BCN
2 stops17h 00m
United Airlines
Deal found 3/10$773
This United Airlines deal was found by Cheapflights users on 3/12. 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 9/28:00 am
BCN
-
ONT
2 stops21h 52m
United Airlines
Wed 9/307:00 am
ONT
-
BCN
2 stops17h 00m
United Airlines
Deal found 3/12$774

Find 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 March 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$744
(Delta)

One-way from

$369
(Avianca)

Popular in

July

Cheapest in

February

Average price

$656
Provider with most accurate pricing for Barcelona-El Prat-Ontario flight deals.
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Provider most trusted by Cheapflights users for Barcelona-El Prat-Ontario flights.
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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 ($125 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in March 2026
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 March 12, 2026.
Use the filters below to find and compare flights from Barcelona-El Prat Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Sat 4/25

8:00 am-10:45 pm

2 stops23h 45m

Ontario

Sat 5/2

6:00 am-8:20 am

2 stops17h 20m

$777
Quickest round-trip

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Fri 5/1

12:00 pm-10:35 pm

2 stops19h 35m

Ontario

Tue 5/5

7:00 am-9:00 am

2 stops17h 00m

$784

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Mon 8/17

11:00 am-9:56 pm

1 stop19h 56m

Ontario

Sun 9/6

6:00 am-2:50 pm

2 stops23h 50m

$929

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 8/6

3:15 pm-10:46 pm

1 stop16h 31m

Ontario

Wed 8/12

7:00 am-1:15 pm

1 stop21h 15m

$969
Cheapest one-way

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 5/7

7:40 am-10:36 pm

2 stops23h 56m

$558

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 8/27

7:40 am-6:17 pm

2 stops19h 37m

$635

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Sat 7/11

5:50 am-9:07 am

3 stops36h 17m

$770

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 3/19

7:50 am-11:59 pm

2 stops24h 09m

$807

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Wed 6/17

1:30 pm-10:40 pm

1 stop18h 10m

$811

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Tue 8/25

10:15 am-10:14 pm

2 stops20h 59m

$838

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Showing 1-10 of 15 resultsSorted by cheapest first
1
2
  • 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, February is the cheapest month in which you can book a flight from Barcelona-El Prat Airport to Ontario (average of $400). Flying from Barcelona-El Prat Airport to Ontario in July is currently the most expensive (average of $589). 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 16h 36m. The distance between Barcelona-El Prat Airport and Ontario is about 5971 mi. This flight may include one or multiple stops.

  • 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, February is the cheapest month in which you can book a flight from Barcelona-El Prat Airport to Ontario (average of $400). Flying from Barcelona-El Prat Airport to Ontario in July is currently the most expensive (average of $589). 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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