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Barcelona-El Prat

$591+ 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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BCN
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
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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 October 23, 2025.

This United Airlines deal was found by Cheapflights users on 10/21. 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 11/41:33 pmONT - BCN
2 stops35h 02mUnited Airlines
Thu 11/201:35 pmBCN - ONT
2 stops41h 56mUnited Airlines
Deal found 10/21$666
This Billigflug deal was found by Cheapflights users on 10/22. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2611:36 amONT - BCN
1 stop36h 04mAir France
Tue 11/1110:55 amBCN - ONT
1 stop17h 47mAir France
Deal found 10/22$672
This United Airlines deal was found by Cheapflights users on 10/22. 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 11/56:05 amONT - BCN
2 stops21h 55mUnited Airlines
Wed 11/121:35 pmBCN - ONT
2 stops41h 56mUnited Airlines
Deal found 10/22$679
This Delta deal was found by Cheapflights users on 10/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/97:05 amONT - BCN
1 stop16h 35mDelta
Wed 11/1910:55 amBCN - ONT
1 stop17h 47mDelta
Deal found 10/21$683
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/125:05 amONT - BCN
2 stops19h 30mUnited Airlines
Thu 11/276:50 amBCN - ONT
2 stops19h 44mUnited Airlines
Deal found 10/20$685
This United Airlines deal was found by Cheapflights users on 10/21. 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 11/47:00 amONT - BCN
2 stops16h 20mUnited Airlines
Tue 11/1110:30 amBCN - ONT
2 stops21h 21mUnited Airlines
Deal found 10/21$687
This United Airlines deal was found by Cheapflights users on 10/22. 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.
Tue 11/186:05 amONT - BCN
2 stops17h 55mUnited Airlines
Thu 11/276:50 amBCN - ONT
2 stops19h 44mUnited Airlines
Deal found 10/22$690
This United Airlines deal was found by Cheapflights users on 10/21. 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 11/225:05 amONT - BCN
2 stops42h 15mUnited Airlines
Tue 12/21:50 pmBCN - ONT
2 stops41h 59mUnited Airlines
Deal found 10/21$722
This United Airlines deal was found by Cheapflights users on 10/21. 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.
Mon 11/247:00 amONT - BCN
2 stops21h 00mUnited Airlines
Tue 12/21:50 pmBCN - ONT
2 stops41h 59mUnited Airlines
Deal found 10/21$724
This Delta deal was found by Cheapflights users on 10/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/237:05 amONT - BCN
1 stop17h 15mDelta
Thu 11/610:55 amBCN - ONT
1 stop17h 24mDelta
Deal found 10/22$725
This Gotogate deal was found by Cheapflights users on 10/21. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/65:05 amONT - BCN
2 stops19h 30mMultiple Airlines
Thu 11/135:50 amBCN - ONT
2 stops24h 59mMultiple Airlines
Deal found 10/21$726
This United Airlines deal was found by Cheapflights users on 10/22. 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.
Thu 11/65:05 amONT - BCN
2 stops19h 30mUnited Airlines
Fri 11/1410:30 amBCN - ONT
2 stops21h 21mUnited Airlines
Deal found 10/22$733

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 October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$626
(Iberia)

One-way from

$591
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$830
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. 27% potential increase in price ($348 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 23, 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 11/12

7:05 am-8:40 am

1 stop16h 35m

Barcelona-El Prat

Thu 11/20

10:55 am-11:04 pm

1 stop21h 09m

$683

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 11/11

5:05 am-9:35 am

2 stops19h 30m

Barcelona-El Prat

Tue 11/25

3:05 pm-10:31 pm

1 stop16h 26m

$683

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 11/9

7:05 am-8:40 am

1 stop16h 35m

Barcelona-El Prat

Wed 11/26

10:55 am-7:42 pm

1 stop17h 47m

$683

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 1/13

10:58 am-8:50 am

1 stop12h 52m

Barcelona-El Prat

Tue 1/20

10:40 am-6:45 pm

1 stop17h 05m

$683

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 11/9

7:05 am-8:40 am

1 stop16h 35m

Barcelona-El Prat

Wed 11/19

10:55 am-7:42 pm

1 stop17h 47m

$683

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 11/12

7:05 am-8:40 am

1 stop16h 35m

Barcelona-El Prat

Tue 11/18

10:55 am-11:04 pm

1 stop21h 09m

$683

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 11/9

7:05 am-8:40 am

1 stop16h 35m

Barcelona-El Prat

Thu 11/20

10:55 am-11:04 pm

1 stop21h 09m

$683

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 11/11

7:05 am-8:40 am

1 stop16h 35m

Barcelona-El Prat

Tue 11/18

10:55 am-11:04 pm

1 stop21h 09m

$683

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 12/9

7:05 am-8:40 am

1 stop16h 35m

Barcelona-El Prat

Wed 12/24

9:30 am-7:50 pm

1 stop19h 20m

$683

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 12/9

7:05 am-8:40 am

1 stop16h 35m

Barcelona-El Prat

Thu 12/25

10:55 am-7:50 pm

1 stop17h 55m

$683

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/23

Showing 1-10 of 20 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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 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 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

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 $378). Flying from Ontario to Barcelona-El Prat Airport in June is currently the most expensive (average of $610). 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 October 23, 2025.

It’s typically best to fly out from Ontario to Barcelona-El Prat Airport in the afternoon. Doing so could potentially save you 17% 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 October 23, 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
7.9
Good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

7.9

Boarding

8.2

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
7.9
Good
7,981 reviews
Delta
7.9
Good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

7.9

Boarding

8.2

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
8,991 reviews
Delta
7.9
Good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

7.9

Boarding

8.2

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
11,028 reviews
Delta
7.9
Good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

7.9

Boarding

8.2

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
2,997 reviews
Delta
7.9
Good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

7.9

Boarding

8.2

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
7,467 reviews
Delta
7.9
Good
7,981 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

7.9

Boarding

8.2

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 Delta and United Airlines fly from Ontario to Barcelona-El Prat Airport in about 16h 35m. The time it takes to get you to your destination can typically vary by up to 2h 55m. 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 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, October is the cheapest month in which you can book a flight from Ontario to Barcelona-El Prat Airport (average of $378). Flying from Ontario to Barcelona-El Prat Airport in June is currently the most expensive (average of $610). 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 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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$544Average$882FlexibilityNo cancel feeOn-time70%
IberiaCheapest$605Average$1,058FlexibilityNo cancel feeOn-time77%
DeltaCheapest$609Average$729FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$682Average$1,065FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$687Average$1,164FlexibilityNo cancel feeOn-time71%

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