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$377+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
BCN — ONT
Apr 8 — Apr 151
Wed 4/8
Wed 4/15
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 9, 2026.

This United Airlines deal was found by Cheapflights users on 3/4. 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 stops22h 50m
United Airlines
Tue 4/215:10 am
ONT
-
BCN
2 stops18h 50m
United Airlines
Deal found 3/4$741
This British Airways deal was found by Cheapflights users on 3/3. 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 4/1610:45 am
BCN
-
ONT
1 stop32h 24m
British Airways
Sun 4/1911:59 pm
ONT
-
BCN
1 stop22h 36m
British Airways
Deal found 3/3$751
This United Airlines deal was found by Cheapflights users on 3/3. 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 4/1612:00 pm
BCN
-
ONT
2 stops19h 31m
United Airlines
Sun 4/197:00 am
ONT
-
BCN
2 stops17h 00m
United Airlines
Deal found 3/3$752
This Delta deal was found by Cheapflights users on 3/4. 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 3/4$753
This Kissandfly.com deal was found by Cheapflights users on 3/5. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/46:40 am
BCN
-
ONT
2 stops24h 10m
Lufthansa
Sat 4/187:00 am
ONT
-
BCN
2 stops41h 00m
Lufthansa
Deal found 3/5$755
This American Airlines deal was found by Cheapflights users on 3/7. 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 11/2011:35 am
BCN
-
ONT
2 stops19h 24m
American Airlines
Thu 12/310:47 am
ONT
-
BCN
2 stops17h 33m
American Airlines
Deal found 3/7$765
This British Airways deal was found by Cheapflights users on 3/5. 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.
Fri 5/19:30 pm
BCN
-
ONT
2 stops30h 07m
British Airways
Tue 5/54:52 pm
ONT
-
BCN
2 stops31h 28m
British Airways
Deal found 3/5$768
This Kissandfly.com deal was found by Cheapflights users on 3/5. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/98:00 am
BCN
-
ONT
2 stops22h 50m
Lufthansa
Fri 4/2411:05 am
ONT
-
BCN
2 stops18h 50m
Lufthansa
Deal found 3/5$769
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:50 am
BCN
-
ONT
2 stops22h 30m
United Airlines
Mon 11/95:00 am
ONT
-
BCN
2 stops18h 20m
United Airlines
Deal found 3/8$776
This Kissandfly.com 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/38:00 am
BCN
-
ONT
2 stops22h 50m
Lufthansa
Fri 4/176:45 pm
ONT
-
BCN
2 stops18h 40m
Lufthansa
Deal found 3/8$778

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 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$741
(United Airlines)

One-way from

$377
(FlightHub)
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.
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From Barcelona-El Prat to Ontario
Search Deals
One-way flight from Barcelona-El Prat to Ontario
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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 9, 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

Thu 4/16

10:45 am-10:09 am

1 stop32h 24m

Ontario

Sun 4/19

11:59 pm-7:35 am

1 stop22h 36m

$751

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 4/16

3:15 pm-10:31 pm

1 stop16h 16m

Ontario

Sun 4/19

5:10 am-1:15 pm

2 stops23h 05m

$752
Quickest round-trip

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Tue 4/21

11:00 am-6:33 pm

1 stop16h 33m

Ontario

Sun 4/26

12:49 pm-12:50 pm

1 stop15h 01m

$752

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Fri 4/17

10:45 am-6:37 pm

1 stop16h 52m

Ontario

Sun 4/19

7:30 am-7:35 am

1 stop15h 05m

$785

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Fri 5/1

12:00 pm-10:59 pm

2 stops19h 59m

Ontario

Tue 5/5

5:00 am-9:00 am

2 stops19h 00m

$786
Cheapest one-way

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Fri 5/8

9:30 pm-6:37 pm

2 stops30h 07m

$531

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Tue 5/12

7:40 am-10:36 pm

2 stops23h 56m

$619

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Tue 5/19

7:40 am-11:56 pm

2 stops25h 16m

$619

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Wed 5/13

10:45 am-6:37 pm

1 stop16h 52m

$647

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Sat 5/23

7:40 am-7:56 pm

2 stops21h 16m

$736

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/8

Showing 1-10 of 17 resultsSorted by cheapest first
1
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  • 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.

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 16m. 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.

See more FAQs

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