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

$469+ 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 6/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BCN
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
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 March 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$859
(United Airlines)

One-way from

$469
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$666
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. 23% potential increase in price ($264 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 25, 2025.

This United Airlines deal was found by Cheapflights users on 3/24. 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.
Sun 10/1210:40 amONT - BCN
1 stop18h 20mUnited Airlines
Wed 10/223:15 pmBCN - ONT
1 stop16h 11mUnited Airlines
Deal found 3/24$749
This Delta deal was found by Cheapflights users on 3/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/77:05 amONT - BCN
1 stop17h 15mDelta
Tue 5/1311:35 amBCN - ONT
1 stop19h 54mDelta
Deal found 3/24$876
This Trip.com deal was found by Cheapflights users on 3/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1210:51 amONT - BCN
1 stop14h 19mIberia
Tue 8/2612:20 pmBCN - ONT
1 stop18h 24mIberia
Deal found 3/24$921
This Air Canada deal was found by Cheapflights users on 3/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/101:20 pmONT - BCN
3 stops33h 30mAir Canada
Sat 5/241:50 pmBCN - ONT
3 stops31h 41mAir Canada
Deal found 3/24$933
This Air Canada deal was found by Cheapflights users on 3/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/104:15 pmONT - BCN
2 stops30h 35mMultiple Airlines
Sat 5/241:50 pmBCN - ONT
3 stops31h 41mMultiple Airlines
Deal found 3/24$934
This oojo deal was found by Cheapflights users on 3/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1210:51 amONT - BCN
1 stop14h 19mBritish Airways
Thu 5/2212:20 pmBCN - ONT
1 stop20h 23mBritish Airways
Deal found 3/24$943
This American Airlines deal was found by Cheapflights users on 3/24. 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 5/1011:59 pmONT - BCN
1 stop25h 11mAmerican Airlines
Sat 5/247:40 amBCN - ONT
2 stops19h 43mAmerican Airlines
Deal found 3/24$965
This AirNGo deal was found by Cheapflights users on 3/24. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1910:15 pmONT - BCN
1 stop26h 05mKLM
Fri 5/211:35 amBCN - ONT
1 stop16h 53mKLM
Deal found 3/24$984

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 March 25, 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 5/12

6:48 pm-2:00 pm

1 stop34h 12m

Barcelona-El Prat

Thu 5/22

12:10 pm-5:25 pm

2 stops38h 15m

$859

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 5/7

7:05 am-9:20 am

1 stop17h 15m

Barcelona-El Prat

Tue 5/13

11:35 am-10:29 pm

1 stop19h 54m

$876

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 8/12

10:51 am-10:10 am

1 stop14h 19m

Barcelona-El Prat

Tue 8/26

12:20 pm-9:44 pm

1 stop18h 24m

$921

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 5/10

1:20 pm-7:50 am

3 stops33h 30m

Barcelona-El Prat

Sat 5/24

1:50 pm-12:31 pm

3 stops31h 41m

$933

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 5/10

4:15 pm-7:50 am

2 stops30h 35m

Barcelona-El Prat

Sat 5/24

1:50 pm-12:31 pm

3 stops31h 41m

$934

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 5/12

10:51 am-10:10 am

1 stop14h 19m

Barcelona-El Prat

Thu 5/22

12:20 pm-11:43 pm

1 stop20h 23m

$943

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 5/10

11:59 pm-10:10 am

1 stop25h 11m

Barcelona-El Prat

Sat 5/24

7:40 am-6:23 pm

2 stops19h 43m

$965

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 4/19

10:15 pm-9:20 am

1 stop26h 05m

Barcelona-El Prat

Fri 5/2

11:35 am-7:28 pm

1 stop16h 53m

$984

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Thu 5/15

11:25 pm-9:00 am

2 stops24h 35m

Barcelona-El Prat

Fri 5/23

2:00 pm-9:55 pm

2 stops40h 55m

$1,512

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 6/22

6:35 am-8:20 pm

3 stops28h 45m

$469

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 19 results
1
2

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
FlightHubPrice Accuracy3 starsTrust Score*3 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 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 FlightHub the most. FlightHub 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

How far ahead should I book a flight from Ontario to Barcelona-El Prat Airport?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Barcelona-El Prat. Price data was last updated on March 21, 2025.

To ensure you get the cheapest price possible for a flight from Ontario to Barcelona-El Prat Airport, you should look to book at least 41 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 $1,085). 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 March 25, 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.

What is the cheapest day to fly from Ontario to Barcelona-El Prat Airport?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Barcelona-El Prat. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to Barcelona-El Prat Airport flight should consider departing on Wednesday at noon when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Barcelona-El Prat by month

Plan your trip to Barcelona-El Prat by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Barcelona-El Prat Airport ranges from 0.8 - 3.6 inches per month. October is typically the wettest month, when rainfall can reach 3.6 in. July is typically the driest time to visit Barcelona-El Prat Airport when rainfall is around 0.8 in.

Temperature in Barcelona-El Prat by month

Plan your trip to Barcelona-El Prat by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Barcelona-El Prat Airport, 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 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 March 25, 2025.
To help decide which airline to fly from Ontario to Barcelona, see what other customers have to say about Delta, KLM and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,890 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

8.0

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
7,890 reviews
Delta
8.0
Very good
7,890 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

8.0

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
1,318 reviews
Delta
8.0
Very good
7,890 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

8.0

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
8,605 reviews
Delta
8.0
Very good
7,890 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

8.0

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
7,890 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

8.0

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.
WestJet
7.2
Good
2,785 reviews
Delta
8.0
Very good
7,890 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

8.0

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. 6 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 $859, 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 Delta and Iberia - these airlines can fly you to your destination from $876 and $921, respectively.

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

    $636 is the cheapest one-way deal found within the past few days, from KLM. You may also be able to find cheap deals on United Airlines and WestJet, with prices starting from $638 and $648, 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 $1,085). 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
Tossa de Mar

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.
Los Angeles to Barcelona-El Prat flights
San Francisco to Barcelona-El Prat flights
San Jose to Barcelona-El Prat flights
Las Vegas to Barcelona-El Prat flights
San Diego to Barcelona-El Prat flights
Oakland to Barcelona-El Prat flights
Sacramento to Barcelona-El Prat flights
Santa Ana to Barcelona-El Prat flights
Burbank to Barcelona-El Prat flights
Fresno to Barcelona-El Prat flights
Los Angeles to Reus flights
Palm Springs to Barcelona-El Prat flights
Long Beach to Barcelona-El Prat flights
Medford to Barcelona-El Prat flights
Santa Barbara to Barcelona-El Prat flights
Reno to Barcelona-El Prat flights
San Francisco to Reus flights
Monterey to Barcelona-El Prat flights
San Luis Obispo to Barcelona-El Prat flights
San Francisco to Costa Brava flights
Los Angeles to Costa Brava flights
Las Vegas to Costa Brava flights

Top 6 airlines flying from Ontario to Barcelona-El Prat

Discover the top 6 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 March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$551Average$936FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$554Average$1,159FlexibilityNo cancel feeOn-time71%
DeltaCheapest$567Average$729FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$582Average$1,032FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$690Average$1,032FlexibilityNo cancel feeOn-time67%
IberiaCheapest$716Average$1,086FlexibilityNo cancel feeOn-time77%
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.