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

$406+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BCN
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
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

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 24, 2026.

This United Airlines deal was found by Cheapflights users on 7/22. 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 8/21:50 pm
ONT
-
BCN
1 stop15h 30m
United Airlines
Fri 9/253:15 pm
BCN
-
ONT
1 stop16h 34m
United Airlines
Deal found 7/22$711
This United Airlines deal was found by Cheapflights users on 7/22. 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 11/46:46 am
ONT
-
BCN
1 stop21h 29m
United Airlines
Fri 11/209:55 am
BCN
-
ONT
2 stops19h 11m
United Airlines
Deal found 7/22$714
This United Airlines deal was found by Cheapflights users on 7/21. 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 10/2011:10 am
ONT
-
BCN
1 stop18h 10m
United Airlines
Thu 10/2910:30 am
BCN
-
ONT
2 stops18h 26m
United Airlines
Deal found 7/21$715
This United Airlines deal was found by Cheapflights users on 7/23. 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 11/245:00 am
ONT
-
BCN
2 stops19h 35m
United Airlines
Tue 12/89:55 am
BCN
-
ONT
2 stops22h 11m
United Airlines
Deal found 7/23$717
This United Airlines deal was found by Cheapflights users on 7/21. 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 9/121:56 pm
ONT
-
BCN
2 stops33h 04m
United Airlines
Fri 9/2512:15 pm
BCN
-
ONT
2 stops43h 34m
United Airlines
Deal found 7/21$724
This United Airlines deal was found by Cheapflights users on 7/23. 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 9/301:24 pm
ONT
-
BCN
2 stops21h 21m
United Airlines
Wed 10/73:15 pm
BCN
-
ONT
1 stop16h 34m
United Airlines
Deal found 7/23$729
This United Airlines deal was found by Cheapflights users on 7/22. 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 8/31:49 pm
ONT
-
BCN
1 stop15h 31m
United Airlines
Wed 8/263:15 pm
BCN
-
ONT
1 stop16h 20m
United Airlines
Deal found 7/22$741
This United Airlines deal was found by Cheapflights users on 7/23. 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 11/79:00 am
ONT
-
BCN
2 stops39h 35m
United Airlines
Mon 11/161:35 pm
BCN
-
ONT
2 stops37h 54m
United Airlines
Deal found 7/23$744
This United Airlines deal was found by Cheapflights users on 7/23. 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 9/89:01 am
ONT
-
BCN
2 stops19h 14m
United Airlines
Tue 9/153:15 pm
BCN
-
ONT
1 stop16h 44m
United Airlines
Deal found 7/23$745
This United Airlines deal was found by Cheapflights users on 7/21. 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 10/1011:10 am
ONT
-
BCN
1 stop18h 10m
United Airlines
Tue 10/206:40 am
BCN
-
ONT
2 stops20h 01m
United Airlines
Deal found 7/21$764

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 July 24, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$714
(United Airlines)

One-way from

$406
(Iberia)

Popular in

December

Cheapest in

September

Average price

$1,373
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. 3% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 24, 2026.
Use the filters below to find and compare flights from Ontario to Barcelona-El Prat Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 8/12

9:01 am-2:20 pm

1 stop20h 19m

Barcelona-El Prat

Mon 8/17

3:15 pm-10:35 pm

1 stop16h 20m

$856

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 8/11

1:56 pm-2:20 pm

1 stop15h 24m

Barcelona-El Prat

Mon 8/17

3:15 pm-10:35 pm

1 stop16h 20m

$856

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 9/14

9:10 pm-11:15 pm

2 stops41h 05m

Barcelona-El Prat

Thu 10/8

7:40 am-11:42 pm

2 stops25h 02m

$1,036

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 10/5

9:10 pm-11:15 pm

2 stops41h 05m

Barcelona-El Prat

Mon 10/19

7:40 am-11:42 pm

2 stops25h 02m

$1,036

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Thu 9/10

6:20 am-11:10 am

1 stop19h 50m

Barcelona-El Prat

Thu 9/17

11:00 am-10:24 pm

1 stop20h 24m

$1,049

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 10/7

11:56 am-5:10 pm

2 stops20h 14m

Barcelona-El Prat

Sun 10/18

1:20 pm-11:16 am

1 stop30h 56m

$1,055

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 9/13

9:10 pm-10:45 am

2 stops28h 35m

Barcelona-El Prat

Sun 9/20

2:35 pm-8:13 pm

2 stops62h 38m

$1,056
Quickest round-trip

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 8/19

10:29 am-10:10 am

1 stop14h 41m

Barcelona-El Prat

Wed 8/26

10:45 am-6:47 pm

1 stop17h 02m

$1,087

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 9/1

11:56 am-11:10 am

1 stop14h 14m

Barcelona-El Prat

Thu 9/10

11:00 am-10:04 pm

2 stops20h 04m

$1,096

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 9/8

11:50 pm-5:40 pm

2 stops32h 50m

Barcelona-El Prat

Wed 9/16

7:05 pm-8:13 pm

2 stops34h 08m

$1,156

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/19

Showing 1-10 of 22 resultsSorted by cheapest first
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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
BusinessClassPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Ontario-Barcelona-El Prat Airport flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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.

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 24, 2026.
Read reviews from past customers who have flown United 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
10,025 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
10,025 reviews
United Airlines
7.4
Good
10,025 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
Iberia
7.0
Good
3,256 reviews
United Airlines
7.4
Good
10,025 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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. 2 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 and Delta fly from Ontario to Barcelona-El Prat Airport in about 19h 50m. The time it takes to get you to your destination can typically vary by up to 29m. 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 $605, Iberia will fly you from Ontario to Barcelona-El Prat Airport and back. In addition to Iberia, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on United Airlines for as low as $714. Iberia 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.

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
Roses
Calella
L'Hospitalet de Llobregat
Cadaques
El Prat de Llobregat

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.

Top 2 airlines flying from Ontario to Barcelona-El Prat

Discover the top 2 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 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$605Average$737FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$714Average$1,111FlexibilityNo cancel feeOn-time69%

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.