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Barcelona-El Prat

$331+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BCN
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
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Cheap 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 January 26, 2026.

This United Airlines deal was found by Cheapflights users on 1/24. 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 3/2111:59 pm
ONT
-
BCN
2 stops25h 01m
United Airlines
Thu 4/912:15 pm
BCN
-
ONT
2 stops43h 11m
United Airlines
Deal found 1/24$829
This oojo deal was found by Cheapflights users on 1/25. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/242:39 pm
ONT
-
BCN
2 stops18h 46m
British Airways
Tue 3/310:40 am
BCN
-
ONT
1 stop17h 02m
British Airways
Deal found 1/25$832
This oojo deal was found by Cheapflights users on 1/25. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:47 pm
ONT
-
BCN
2 stops18h 03m
British Airways
Thu 10/81:30 pm
BCN
-
ONT
1 stop30h 32m
British Airways
Deal found 1/25$840
This oojo deal was found by Cheapflights users on 1/25. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:00 am
ONT
-
BCN
1 stop16h 35m
British Airways
Tue 4/1410:45 am
BCN
-
ONT
1 stop19h 09m
British Airways
Deal found 1/25$841
This American Airlines deal was found by Cheapflights users on 1/24. 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.
Sat 3/2111:58 pm
ONT
-
BCN
1 stop23h 52m
American Airlines
Thu 4/910:45 am
BCN
-
ONT
1 stop16h 52m
American Airlines
Deal found 1/24$844
This United Airlines deal was found by Cheapflights users on 1/24. 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.
Tue 3/105:15 am
ONT
-
BCN
2 stops19h 05m
United Airlines
Tue 3/176:50 am
BCN
-
ONT
2 stops18h 51m
United Airlines
Deal found 1/24$848
This oojo deal was found by Cheapflights users on 1/25. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:00 am
ONT
-
BCN
1 stop17h 50m
British Airways
Mon 3/99:00 pm
BCN
-
ONT
2 stops33h 07m
British Airways
Deal found 1/25$851
This United Airlines deal was found by Cheapflights users on 1/26. 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.
Tue 4/287:00 am
ONT
-
BCN
1 stop21h 15m
United Airlines
Tue 5/512:15 pm
BCN
-
ONT
2 stops43h 15m
United Airlines
Deal found 1/26$852
This oojo deal was found by Cheapflights users on 1/25. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/243:19 pm
ONT
-
BCN
2 stops19h 06m
British Airways
Tue 3/3110:45 am
BCN
-
ONT
1 stop16h 57m
British Airways
Deal found 1/25$855
This Air Canada deal was found by Cheapflights users on 1/25. 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 4/157:00 am
ONT
-
BCN
2 stops17h 20m
Multiple Airlines
Fri 4/2412:15 pm
BCN
-
ONT
2 stops19h 11m
Multiple Airlines
Deal found 1/25$856
This oojo deal was found by Cheapflights users on 1/25. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2110:59 am
ONT
-
BCN
2 stops17h 16m
British Airways
Tue 5/1210:45 am
BCN
-
ONT
1 stop19h 09m
British Airways
Deal found 1/25$860

Find 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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$829
(United Airlines)

One-way from

$331
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$540
Provider with most accurate pricing for Ontario-Barcelona-El Prat flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Barcelona-El Prat flights.
Search Deals
From Ontario to Barcelona-El Prat
Search Deals
One-way flight from Ontario to Barcelona-El Prat
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($284 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 26, 2026.
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

Tue 3/10

3:19 pm-6:25 pm

2 stops19h 06m

Barcelona-El Prat

Tue 3/17

9:35 am-10:49 pm

1 stop21h 14m

$832

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 4/15

12:49 pm-12:50 pm

1 stop15h 01m

Barcelona-El Prat

Fri 4/24

11:00 am-6:28 pm

1 stop16h 28m

$844

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 4/28

7:00 am-1:15 pm

1 stop21h 15m

Barcelona-El Prat

Tue 5/5

12:15 pm-10:30 pm

2 stops43h 15m

$852

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 4/6

12:57 pm-12:50 pm

1 stop14h 53m

Barcelona-El Prat

Tue 4/14

11:00 am-6:28 pm

1 stop16h 28m

$872

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 5/19

6:00 am-2:20 pm

1 stop23h 20m

Barcelona-El Prat

Tue 5/26

12:15 pm-11:06 pm

2 stops43h 51m

$879

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 3/28

10:25 pm-12:50 pm

1 stop29h 25m

Barcelona-El Prat

Thu 4/9

11:00 am-9:00 pm

1 stop19h 00m

$881

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 3/28

10:25 pm-12:50 pm

1 stop29h 25m

Barcelona-El Prat

Wed 4/8

1:25 pm-11:51 pm

2 stops19h 26m

$887

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 3/1

6:00 am-9:00 am

2 stops18h 00m

Barcelona-El Prat

Sun 3/8

10:30 am-9:18 pm

2 stops19h 48m

$899

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 4/13

6:05 am-8:20 am

2 stops17h 15m

Barcelona-El Prat

Sun 4/19

8:00 am-8:36 pm

2 stops21h 36m

$903

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 3/28

10:25 pm-12:50 pm

1 stop29h 25m

Barcelona-El Prat

Tue 4/7

11:10 am-10:34 pm

2 stops20h 24m

$914

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 23 results
1
2
3

Compare providers for flights from Ontario to Barcelona-El Prat

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 Ontario to Barcelona-El Prat in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 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 Ontario-Barcelona-El Prat Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Barcelona-El Prat Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Barcelona-El Prat Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Barcelona-El Prat Airport flights, Cheapflights users trust Expedia the most. Expedia 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 Ontario-Barcelona-El Prat Airport 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 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, October is the cheapest month in which you can book a flight from Ontario to Barcelona-El Prat Airport (average of $367). Flying from Ontario to Barcelona-El Prat Airport in June is currently the most expensive (average of $630). 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.

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 January 26, 2026.
Read reviews from past customers who have flown United Airlines, American Airlines, and Iberia 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.
United Airlines
7.4
Good
9,198 reviews

Boarding

7.7

Food

6.6

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
9,198 reviews
United Airlines
7.4
Good
9,198 reviews

Boarding

7.7

Food

6.6

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
11,189 reviews
United Airlines
7.4
Good
9,198 reviews

Boarding

7.7

Food

6.6

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Iberia
7.0
Good
3,098 reviews
United Airlines
7.4
Good
9,198 reviews

Boarding

7.7

Food

6.6

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.7
Okay
7,700 reviews
United Airlines
7.4
Good
9,198 reviews

Boarding

7.7

Food

6.6

Entertainment

7.1

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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. 4 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.

  • How long is the flight from Ontario to Barcelona-El Prat Airport?

    Airlines like British Airways, KLM, and United Airlines fly from Ontario to Barcelona-El Prat Airport in about 15h 01m. The time it takes to get you to your destination can typically vary by up to 6h 14m. Ontario and Barcelona-El Prat Airport are separated by a distance of 5971 mi. This flight may include one or multiple stops.

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

    Currently priced at $544, British Airways will fly you from Ontario to Barcelona-El Prat Airport and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Iberia and United Airlines - these airlines can fly you to your destination from $605 and $688, respectively. British Airways is priced at 45% lower than the current average price of a flight leaving 3 months from now.

  • 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, October is the cheapest month in which you can book a flight from Ontario to Barcelona-El Prat Airport (average of $367). Flying from Ontario to Barcelona-El Prat Airport in June is currently the most expensive (average of $630). 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 Barcelona-El Prat Airport?

Book flights to Barcelona-El Prat Airport if you plan to visit one of these locations
Calella
Roses
L'Hospitalet de Llobregat
Cadaques
El Prat de Llobregat
Badalona
Pineda de Mar

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Alternative routes for Ontario to Barcelona-El Prat

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Ontario to Barcelona-El Prat

Discover the top 4 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 January 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$544Average$955FlexibilityNo cancel feeOn-time70%
IberiaCheapest$605Average$993FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$688Average$1,102FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,005Average$1,165FlexibilityNo cancel feeOn-time71%

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