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Barcelona-El Prat

$336+ Cheap flights from Ontario (ONT) to Barcelona-El Prat (BCN)

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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BCN
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap flight deals from Ontario to Barcelona-El Prat

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Barcelona-El Prat (BCN). 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 3, 2025.

Round-trip from

$660
(United Airlines)

One-way from

$336
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,135
From Ontario to Barcelona-El Prat
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One-way flight from Ontario to Barcelona-El Prat
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Highest demand for flights based on searches. 27% potential increase in price ($340 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($46 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 Ontario to Barcelona-El Prat

Cheapest flights from Ontario to Barcelona-El Prat
Explore the most affordable flight options available from Ontario to Barcelona-El Prat. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This United Airlines deal was found by Cheapflights users on 7/3. 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.
Mon 11/37:00 amONT - BCN
1 stop21h 05mUnited Airlines
Wed 11/121:35 pmBCN - ONT
3 stops42h 10mUnited Airlines
Deal found 7/3$660
This Iberia deal was found by Cheapflights users on 7/1. 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.
Sat 9/272:54 pmONT - BCN
2 stops19h 21mIberia
Wed 10/2212:20 pmBCN - ONT
1 stop19h 22mIberia
Deal found 7/1$676
This Air Canada deal was found by Cheapflights users on 7/2. 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.
Tue 12/96:42 pmONT - BCN
2 stops29h 53mMultiple Airlines
Tue 12/231:35 pmBCN - ONT
3 stops31h 58mMultiple Airlines
Deal found 7/2$685
This Virgin Atlantic deal was found by Cheapflights users on 7/3. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/97:00 amONT - BCN
1 stop16h 40mVirgin Atlantic
Tue 12/2310:55 amBCN - ONT
2 stops21h 56mVirgin Atlantic
Deal found 7/3$687
This Expedia deal was found by Cheapflights users on 7/1. 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.
Sat 9/276:51 pmONT - BCN
2 stops27h 59mAir Canada
Wed 10/2212:10 pmBCN - ONT
2 stops33h 03mAir Canada
Deal found 7/1$694
This Booking.com deal was found by Cheapflights users on 7/2. 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.
Sun 8/36:10 amONT - BCN
1 stop19h 00mBritish Airways
Tue 8/1912:20 pmBCN - ONT
1 stop19h 28mBritish Airways
Deal found 7/2$705
This American Airlines deal was found by Cheapflights users on 6/30. 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.
Mon 8/412:59 amONT - BCN
1 stop24h 11mAmerican Airlines
Thu 8/2812:50 pmBCN - ONT
2 stops17h 49mAmerican Airlines
Deal found 6/30$717
This Delta deal was found by Cheapflights users on 6/30. 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.
Sun 10/510:00 pmONT - BCN
1 stop26h 20mDelta
Tue 10/219:55 amBCN - ONT
2 stops21h 46mDelta
Deal found 6/30$718
This KLM deal was found by Cheapflights users on 7/1. 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.
Mon 8/187:05 amONT - BCN
1 stop17h 15mKLM
Sat 9/611:35 amBCN - ONT
1 stop16h 36mKLM
Deal found 7/1$733

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Barcelona-El Prat 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 3, 2025.
Use the filters below to find and compare flights from Ontario to Barcelona-El Prat Airport that are best for you.

Fly from

Ontario

Fly to

Barcelona-El Prat

Route

Depart

Return

Price

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 11/3

7:00 am-1:05 pm

1 stop21h 05m

Barcelona-El Prat

Wed 11/12

1:35 pm-10:45 pm

3 stops42h 10m

$660

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 9/27

2:54 pm-7:15 pm

2 stops19h 21m

Barcelona-El Prat

Wed 10/22

12:20 pm-10:42 pm

1 stop19h 22m

$676

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 12/9

6:42 pm-9:35 am

2 stops29h 53m

Barcelona-El Prat

Tue 12/23

1:35 pm-12:33 pm

3 stops31h 58m

$685

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 12/9

7:00 am-8:40 am

1 stop16h 40m

Barcelona-El Prat

Tue 12/23

10:55 am-11:51 pm

2 stops21h 56m

$687

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 9/27

6:51 pm-7:50 am

2 stops27h 59m

Barcelona-El Prat

Wed 10/22

12:10 pm-12:13 pm

2 stops33h 03m

$694

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 8/3

6:10 am-10:10 am

1 stop19h 00m

Barcelona-El Prat

Tue 8/19

12:20 pm-10:48 pm

1 stop19h 28m

$705

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 8/4

12:59 am-10:10 am

1 stop24h 11m

Barcelona-El Prat

Thu 8/28

12:50 pm-9:39 pm

2 stops17h 49m

$717

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 10/5

10:00 pm-9:20 am

1 stop26h 20m

Barcelona-El Prat

Tue 10/21

9:55 am-10:41 pm

2 stops21h 46m

$718

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 8/20

7:05 am-7:15 am

1 stop15h 10m

Barcelona-El Prat

Wed 9/3

11:35 am-7:11 pm

1 stop16h 36m

$743

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 9/10

8:59 pm-2:45 pm

2 stops32h 46m

$336

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 16 results
1
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Best time to book a flight from Ontario to Barcelona-El Prat

Have a flexible travel schedule? Discover the best time to fly to Barcelona-El Prat from Ontario 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 Ontario to Barcelona-El Prat Airport

What is the cheapest month to book a flight from Ontario to Barcelona-El Prat Airport?

Currently, January is the cheapest month in which you can book a flight from Ontario to Barcelona-El Prat Airport (average of $523). Flying from Ontario to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,059). 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.

What is the cheapest time of day to fly from ONT to BCN?

Find hourly flight availability from Ontario to Barcelona-El Prat. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

It’s typically best to fly out from Ontario to Barcelona-El Prat Airport in the afternoon. Doing so could potentially save you 18% on the flight price compared to flying in the evening, which is usually more expensive.

How much does it cost to fly round-trip from Ontario to Barcelona-El Prat Airport?

Reviews of airlines servicing Barcelona-El Prat

Get insights into the airlines that provide service to Barcelona-El Prat. 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 Barcelona-El Prat. Reviews last updated July 3, 2025.
Read reviews from past customers who have flown Delta, KLM, and United Airlines from Ontario to Barcelona-El Prat Airport. 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
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,970 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,366 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,845 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
654 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Barcelona-El Prat. 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 from for flights from Ontario to Barcelona-El Prat?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Barcelona-El Prat. 5 airlines have flights from Ontario to Barcelona-El Prat on a regular basis. Booking flights from Ontario to Barcelona-El Prat should not be difficult; the airport handles an average of 0 outbound flights to Barcelona-El Prat per day.

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

    Currently priced at $660, United Airlines will fly you from Ontario to Barcelona-El Prat Airport and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Iberia and Virgin Atlantic - these airlines can fly you to your destination from $676 and $687, respectively. United Airlines is priced at 27% lower than the current average price of a flight leaving 3 months from now.

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

    $513 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and British Airways, with prices starting from $518 and $519, respectively.

  • Can I find deals for flights from Ontario to Barcelona-El Prat that include hotel bookings?

    Yes. In addition to deals on Ontario to Barcelona-El Prat flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Barcelona-El Prat?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Barcelona-El Prat.

  • Can I find deals for business class flights from Ontario to Barcelona-El Prat?

    Yes. Cheapflights offers flight deals from Ontario to Barcelona-El Prat 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 Ontario to Barcelona-El Prat Airport?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Barcelona-El Prat Airport (average of $523). Flying from Ontario to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,059). 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

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Calella
Castelldefels
Cadaques
L'Hospitalet de Llobregat
El Prat de Llobregat
Badalona
Pineda de Mar
Santa Susanna

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Alternative routes for Ontario to Barcelona-El Prat

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Top 5 airlines flying from Ontario to Barcelona-El Prat

Discover the top 5 airlines that operate flights from Ontario to Barcelona-El Prat. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$544Average$818FlexibilityNo cancel feeOn-time70%
DeltaCheapest$566Average$729FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$583Average$1,032FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$687Average$1,108FlexibilityNo cancel feeOn-time71%
IberiaCheapest$707Average$1,100FlexibilityNo cancel feeOn-time77%

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