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$508+ 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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
BCN — ONT
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$635
(British Airways)

One-way from

$508
(Thrive Travel)

Popular in

July

Cheapest in

February

Average price

$772
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 ($121 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This KLM deal was found by Cheapflights users on 6/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/1110:55 amBCN - ONT
1 stop20h 46mKLM
mié. 11/1910:59 pmONT - BCN
1 stop24h 41mKLM
Deal found 6/10$618
This United Airlines deal was found by Cheapflights users on 6/12. 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.
lun. 10/204:00 pmBCN - ONT
1 stop15h 42mUnited Airlines
lun. 10/276:09 amONT - BCN
2 stops18h 51mUnited Airlines
Deal found 6/12$620
This British Airways deal was found by Cheapflights users on 6/11. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/2612:20 pmBCN - ONT
1 stop15h 41mBritish Airways
jue. 7/1010:53 amONT - BCN
1 stop14h 17mBritish Airways
Deal found 6/11$635
This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/912:10 pmBCN - ONT
2 stops17h 44mMultiple Airlines
mié. 7/166:10 amONT - BCN
2 stops16h 40mMultiple Airlines
Deal found 6/11$644
This Iberia deal was found by Cheapflights users on 6/11. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/1312:20 pmBCN - ONT
1 stop19h 28mIberia
mar. 8/2610:50 amONT - BCN
1 stop14h 20mIberia
Deal found 6/11$692
This Air Canada deal was found by Cheapflights users on 6/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/2812:10 pmBCN - ONT
2 stops17h 33mAir Canada
jue. 3/195:40 amONT - BCN
2 stops18h 55mAir Canada
Deal found 6/10$773
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/1210:45 amBCN - ONT
2 stops21h 03mAmerican Airlines
dom. 8/3111:59 pmONT - BCN
1 stop25h 11mAmerican Airlines
Deal found 6/11$812
This Kissandfly.com deal was found by Cheapflights users on 6/11. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/104:00 pmBCN - ONT
1 stop15h 52mLufthansa
vie. 8/296:50 pmONT - BCN
1 stop34h 10mLufthansa
Deal found 6/11$1,158
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/3111:35 amBCN - ONT
1 stop19h 52mDelta
vie. 8/227:05 amONT - BCN
1 stop15h 10mDelta
Deal found 6/12$1,159

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 junio 12, 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

jue. 6/26

12:20 pm-7:01 pm

1 stop15h 41m

Ontario

jue. 7/10

10:53 am-10:10 am

1 stop14h 17m

$635

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

lun. 8/18

4:00 pm-10:52 pm

1 stop15h 52m

Ontario

lun. 9/1

5:10 am-7:50 am

2 stops17h 40m

$636

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

mié. 7/9

12:10 pm-8:54 pm

2 stops17h 44m

Ontario

mié. 7/16

6:10 am-7:50 am

2 stops16h 40m

$644

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

mié. 8/13

12:20 pm-10:48 pm

1 stop19h 28m

Ontario

mar. 8/26

10:50 am-10:10 am

1 stop14h 20m

$692

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

jue. 8/28

12:10 pm-8:43 pm

2 stops17h 33m

Ontario

jue. 3/19

5:40 am-8:35 am

2 stops18h 55m

$773

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

mar. 8/12

10:45 am-10:48 pm

2 stops21h 03m

Ontario

dom. 8/31

11:59 pm-10:10 am

1 stop25h 11m

$812

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

vie. 8/8

11:35 am-10:27 pm

1 stop19h 52m

Ontario

mié. 8/27

7:05 am-7:15 am

1 stop15h 10m

$946

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

dom. 8/10

4:00 pm-10:52 pm

1 stop15h 52m

Ontario

vie. 8/29

6:50 pm-2:00 pm

1 stop34h 10m

$1,158

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

jue. 7/31

11:35 am-10:27 pm

1 stop19h 52m

Ontario

vie. 8/22

7:05 am-7:15 am

1 stop15h 10m

$1,159

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

vie. 8/29

6:50 am-9:25 pm

2 stops23h 35m

$508

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 19 results
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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 junio 12, 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
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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
Air Canada
7.1
Good
9,537 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

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 $635 on this airline. Additional options worth looking into are United Airlines and Iberia, starting at $636 and $692 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 Lufthansa, which is currently one of the cheapest options available, starting at $508. Iberia flights start at $542 while deals on KLM start at $771 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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