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$489+ 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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
BCN — ONT
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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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 July 30, 2025.

Round-trip from

$666
(Booking.com)

One-way from

$489
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$883
From Barcelona-El Prat to Ontario
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One-way flight from Barcelona-El Prat to Ontario
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Highest demand for flights based on searches. 14% potential increase in price ($123 potential increase over avg. RT price).
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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 July 2025
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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 July 30, 2025.

This Booking.com deal was found by Cheapflights users on 7/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2712:20 pmBCN - ONT
1 stop15h 04mBritish Airways
Tue 9/1610:53 amONT - BCN
1 stop14h 17mBritish Airways
Deal found 7/28$666
This American Airlines deal was found by Cheapflights users on 7/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2712:20 pmBCN - ONT
1 stop15h 04mAmerican Airlines
Wed 9/310:53 amONT - BCN
1 stop14h 17mAmerican Airlines
Deal found 7/28$692
This Iberia deal was found by Cheapflights users on 7/29. 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.
Tue 9/2312:20 pmBCN - ONT
1 stop19h 13mIberia
Mon 10/610:57 amONT - BCN
1 stop14h 13mIberia
Deal found 7/29$728
This ResecentrumGruppen deal was found by Cheapflights users on 7/30. 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 ResecentrumGruppen is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1111:35 amBCN - ONT
1 stop16h 40mKLM
Sat 9/277:05 amONT - BCN
1 stop17h 15mKLM
Deal found 7/30$758
This United Airlines deal was found by Cheapflights users on 7/30. 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 9/1311:15 amBCN - ONT
2 stops20h 15mUnited Airlines
Sat 9/201:42 pmONT - BCN
1 stop15h 18mUnited Airlines
Deal found 7/30$780
This Air Canada deal was found by Cheapflights users on 7/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2712:10 pmBCN - ONT
2 stops17h 33mMultiple Airlines
Wed 9/37:00 amONT - BCN
2 stops15h 50mMultiple Airlines
Deal found 7/28$792
This Delta deal was found by Cheapflights users on 7/29. 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.
Mon 9/2211:35 amBCN - ONT
1 stop19h 48mDelta
Wed 10/17:05 amONT - BCN
1 stop17h 15mDelta
Deal found 7/29$810

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 July 30, 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 8/27

12:20 pm-6:24 pm

1 stop15h 04m

Ontario

Tue 9/16

10:53 am-10:10 am

1 stop14h 17m

$666

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Wed 8/27

12:20 pm-6:24 pm

1 stop15h 04m

Ontario

Wed 9/3

10:53 am-10:10 am

1 stop14h 17m

$692

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Tue 9/23

12:20 pm-10:33 pm

1 stop19h 13m

Ontario

Mon 10/6

10:57 am-10:10 am

1 stop14h 13m

$728

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 9/11

11:35 am-7:15 pm

1 stop16h 40m

Ontario

Sat 9/27

7:05 am-9:20 am

1 stop17h 15m

$758

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Sat 9/13

11:15 am-10:30 pm

2 stops20h 15m

Ontario

Sat 9/20

1:42 pm-2:00 pm

1 stop15h 18m

$780

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Wed 8/27

12:10 pm-8:43 pm

2 stops17h 33m

Ontario

Wed 9/3

7:00 am-7:50 am

2 stops15h 50m

$792

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Mon 9/22

11:35 am-10:23 pm

1 stop19h 48m

Ontario

Wed 10/1

7:05 am-9:20 am

1 stop17h 15m

$810

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 10/9

6:30 pm-11:50 pm

2 stops38h 20m

$489

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Wed 10/15

12:20 pm-7:03 pm

1 stop15h 43m

$746

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Sat 10/25

11:35 am-7:19 pm

1 stop16h 44m

$780

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 14 results
1
2

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, August is the cheapest month in which you can book a flight from Barcelona-El Prat Airport to Ontario (average of $246). Flying from Barcelona-El Prat Airport to Ontario in March is currently the most expensive (average of $328). 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.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated July 30, 2025.
Read reviews from past customers who have flown Delta, KLM, and United Airlines from Barcelona-El Prat Airport to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
WestJet
7.2
Good
2,975 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • What are the cheapest airlines flying from Barcelona-El Prat Airport to Ontario round-trip?

    Our cheapest airline available from Barcelona-El Prat Airport to Ontario is British Airways. Our recent data shows that you can find tickets from as low as $666 on this airline. Additional options worth looking into are American Airlines and Iberia, starting at $692 and $728 round-trip.

  • What are the cheapest airlines to fly from Barcelona-El Prat Airport to Ontario one-way?

    To fly one-way, consider booking your trip with Iberia, which is currently one of the cheapest options available, starting at $746. Delta flights start at $780 while deals on WestJet start at $783 one-way.

  • 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, August is the cheapest month in which you can book a flight from Barcelona-El Prat Airport to Ontario (average of $246). Flying from Barcelona-El Prat Airport to Ontario in March is currently the most expensive (average of $328). 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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