HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Barcelona-El Prat

$322+ 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
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Barcelona-El Prat with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 September 17, 2025.

Round-trip from

$520
(Air Canada)

One-way from

$322
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,038
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. 27% potential increase in price ($347 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 17, 2025.

This Air Canada deal was found by Cheapflights users on 9/16. 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 11/126:00 amONT - BCN
2 stops18h 35mMultiple Airlines
Tue 11/251:35 pmBCN - ONT
2 stops41h 56mMultiple Airlines
Deal found 9/16$520
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/141:53 pmONT - BCN
1 stop15h 07mUnited Airlines
Fri 10/243:15 pmBCN - ONT
1 stop16h 15mUnited Airlines
Deal found 9/16$543
This United Airlines deal was found by Cheapflights users on 9/15. 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 12/36:00 amONT - BCN
2 stops18h 00mUnited Airlines
Thu 12/1111:00 amBCN - ONT
2 stops18h 42mUnited Airlines
Deal found 9/15$547
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/141:53 pmONT - BCN
1 stop15h 07mMultiple Airlines
Wed 10/296:50 amBCN - ONT
2 stops21h 54mMultiple Airlines
Deal found 9/15$552
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Thu 10/307:00 amONT - BCN
1 stop22h 10mUnited Airlines
Thu 11/61:35 pmBCN - ONT
2 stops41h 56mUnited Airlines
Deal found 9/15$570
This Iberia deal was found by Cheapflights users on 9/15. 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.
Fri 11/287:00 amONT - BCN
2 stops25h 10mIberia
Mon 12/86:55 pmBCN - ONT
2 stops23h 59mIberia
Deal found 9/15$574
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 10/176:36 pmONT - BCN
1 stop34h 24mUnited Airlines
Fri 10/3112:35 pmBCN - ONT
2 stops41h 56mUnited Airlines
Deal found 9/16$575
This Delta deal was found by Cheapflights users on 9/15. 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.
Tue 10/1411:48 amONT - BCN
2 stops20h 22mDelta
Wed 10/296:00 amBCN - ONT
2 stops23h 20mDelta
Deal found 9/15$589
This United Airlines deal was found by Cheapflights users on 9/16. 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 11/265:05 amONT - BCN
2 stops19h 30mUnited Airlines
Sat 12/610:30 amBCN - ONT
2 stops19h 12mUnited Airlines
Deal found 9/16$597

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 September 17, 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

Wed 10/29

7:00 am-1:10 pm

1 stop22h 10m

Barcelona-El Prat

Thu 11/6

3:05 pm-10:31 pm

1 stop16h 26m

$543

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 11/19

5:05 am-9:35 am

2 stops19h 30m

Barcelona-El Prat

Wed 11/26

3:05 pm-10:31 pm

1 stop16h 26m

$543

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 10/29

7:00 am-1:10 pm

1 stop22h 10m

Barcelona-El Prat

Wed 11/12

10:30 am-10:51 pm

2 stops21h 21m

$543

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 1/20

6:00 am-9:00 am

2 stops18h 00m

Barcelona-El Prat

Tue 1/27

11:00 am-10:26 pm

2 stops20h 26m

$547

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 1/14

5:05 am-9:35 am

2 stops19h 30m

Barcelona-El Prat

Wed 1/28

11:00 am-10:26 pm

2 stops20h 26m

$547

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 1/13

6:00 am-9:00 am

2 stops18h 00m

Barcelona-El Prat

Tue 1/27

11:00 am-10:53 pm

2 stops20h 53m

$547

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Thu 10/30

6:00 am-8:35 am

2 stops18h 35m

Barcelona-El Prat

Thu 11/6

1:35 pm-10:31 pm

2 stops41h 56m

$570

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 11/3

5:05 am-9:35 am

2 stops19h 30m

Barcelona-El Prat

Sun 11/16

3:05 pm-10:31 pm

1 stop16h 26m

$593

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 11/9

5:05 am-9:35 am

2 stops19h 30m

Barcelona-El Prat

Sun 11/23

10:30 am-10:51 pm

2 stops21h 21m

$593

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Fri 1/16

5:05 am-9:35 am

2 stops19h 30m

Barcelona-El Prat

Fri 1/30

11:00 am-10:26 pm

2 stops20h 26m

$597

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 19 results
1
2

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 $1,061). 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 September 17, 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 September 17, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American 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
7,961 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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
7,961 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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.
Iberia
7.0
Good
2,925 reviews
Delta
8.0
Very good
7,961 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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.
British Airways
6.7
Okay
7,367 reviews
Delta
8.0
Very good
7,961 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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.

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

    Airlines like United Airlines fly from Ontario to Barcelona-El Prat Airport in about 22h 10m. The time it takes to get you to your destination can typically vary by up to . Ontario and Barcelona-El Prat Airport are separated by a distance of 5971 mi.

  • 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 Delta - these airlines can fly you to your destination from $605 and $609, respectively. British Airways is priced at 41% 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, 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 $1,061). 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
Castelldefels
L'Hospitalet de Llobregat
Cadaques
El Prat de Llobregat
Badalona
Pineda de Mar
Santa Susanna

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Barcelona-El Prat

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Barcelona-El Prat flights
Los Angeles to Barcelona-El Prat flights
Santa Ana to Barcelona-El Prat flights
San Jose to Barcelona-El Prat flights
San Diego to Barcelona-El Prat flights
Oakland to Barcelona-El Prat flights
Las Vegas to Barcelona-El Prat flights
Sacramento to Barcelona-El Prat flights
Burbank to Barcelona-El Prat flights
Santa Barbara to Barcelona-El Prat flights
Reno to Barcelona-El Prat flights
Fresno to Barcelona-El Prat flights
Long Beach to Barcelona-El Prat flights
Palm Springs to Barcelona-El Prat flights
Monterey to Barcelona-El Prat flights
San Luis Obispo to Barcelona-El Prat flights
San Francisco to Costa Brava flights
Medford to Barcelona-El Prat flights
San Francisco to Reus flights
Los Angeles to Reus flights
Los Angeles to Costa Brava flights
Las Vegas to Costa Brava flights

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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$544Average$936FlexibilityNo cancel feeOn-time70%
IberiaCheapest$605Average$1,030FlexibilityNo cancel feeOn-time77%
DeltaCheapest$609Average$729FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$662Average$1,040FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$687Average$1,164FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.