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$669+ 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
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$731
(United Airlines)

One-way from

$669
(Thrive Travel)

Popular in

July

Cheapest in

February

Average price

$672
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
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One-way flight from Barcelona-El Prat to Ontario
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Highest demand for flights based on searches. 17% potential increase in price ($155 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This United Airlines deal was found by Cheapflights users on 4/30. 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.
Wed 5/1412:15 pmBCN - ONT
2 stops17h 38mUnited Airlines
Wed 5/211:45 pmONT - BCN
1 stop15h 15mUnited Airlines
Deal found 4/30$731
This Trip.com deal was found by Cheapflights users on 4/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1412:20 pmBCN - ONT
1 stop20h 16mIberia
Sat 9/2710:54 amONT - BCN
1 stop14h 16mIberia
Deal found 4/30$737
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/169:20 amBCN - ONT
2 stops22h 15mDelta
Tue 5/2010:01 amONT - BCN
2 stops22h 09mDelta
Deal found 4/30$766
This KLM deal was found by Cheapflights users on 4/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/610:55 amBCN - ONT
1 stop20h 46mKLM
Sat 12/1310:59 pmONT - BCN
1 stop24h 41mKLM
Deal found 4/30$925
This Air Canada deal was found by Cheapflights users on 4/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/161:15 pmBCN - ONT
2 stops32h 09mMultiple Airlines
Tue 5/201:20 pmONT - BCN
3 stops33h 30mMultiple Airlines
Deal found 4/30$941
This Booking.com deal was found by Cheapflights users on 4/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2412:20 pmBCN - ONT
1 stop15h 33mBritish Airways
Sat 8/910:50 amONT - BCN
1 stop14h 20mBritish Airways
Deal found 4/30$951
This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2412:20 pmBCN - ONT
1 stop15h 33mAmerican Airlines
Sun 8/1710:50 amONT - BCN
1 stop14h 20mAmerican Airlines
Deal found 4/30$1,096
This Air Canada deal was found by Cheapflights users on 4/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/166:50 amBCN - ONT
3 stops23h 03mAir Canada
Tue 5/201:20 pmONT - BCN
3 stops33h 30mAir Canada
Deal found 4/30$1,418
This Booking.com deal was found by Cheapflights users on 4/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/22:00 pmBCN - ONT
2 stops40h 55mAvianca
Tue 5/1311:25 pmONT - BCN
2 stops24h 35mAvianca
Deal found 4/30$1,425

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 May 1, 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 5/14

12:15 pm-8:53 pm

2 stops17h 38m

Ontario

Wed 5/21

1:45 pm-2:00 pm

1 stop15h 15m

$731

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Sun 9/14

12:20 pm-11:36 pm

1 stop20h 16m

Ontario

Sat 9/27

10:54 am-10:10 am

1 stop14h 16m

$737

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Fri 5/16

9:20 am-10:35 pm

2 stops22h 15m

Ontario

Tue 5/20

10:01 am-5:10 pm

2 stops22h 09m

$766

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Fri 5/16

1:15 pm-12:24 pm

2 stops32h 09m

Ontario

Tue 5/20

1:20 pm-7:50 am

3 stops33h 30m

$941

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 7/24

12:20 pm-6:53 pm

1 stop15h 33m

Ontario

Sat 8/9

10:50 am-10:10 am

1 stop14h 20m

$951

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Tue 5/13

11:35 am-10:29 pm

1 stop19h 54m

Ontario

Mon 5/26

7:05 am-9:20 am

1 stop17h 15m

$1,022

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 7/24

12:20 pm-6:53 pm

1 stop15h 33m

Ontario

Sun 8/17

10:50 am-10:10 am

1 stop14h 20m

$1,096

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Fri 5/16

6:50 am-8:53 pm

3 stops23h 03m

Ontario

Tue 5/20

1:20 pm-7:50 am

3 stops33h 30m

$1,418

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Fri 5/16

2:00 pm-9:55 pm

2 stops40h 55m

Ontario

Tue 5/20

11:25 pm-9:00 am

2 stops24h 35m

$1,458

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 5/8

12:20 pm-9:58 pm

1 stop18h 38m

$669

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 19 results
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Compare providers for flights from Barcelona-El Prat to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Barcelona-El Prat to Ontario in May.
ProviderPrice AccuracyTrust Score*
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Barcelona-El Prat Airport-Ontario flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Barcelona-El Prat Airport-Ontario flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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, 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 May 1, 2025.
Get a feel of what it's like to fly with Delta, KLM and United Airlines from Barcelona to Ontario by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

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
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

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
1,334 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

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
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

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
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

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
2,826 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

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 United Airlines. Our recent data shows that you can find tickets from as low as $731 on this airline. Additional options worth looking into are Iberia and Delta, starting at $737 and $766 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 British Airways, which is currently one of the cheapest options available, starting at $693. Avianca flights start at $768 while deals on KLM start at $773 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.

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