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$399+ Cheap flights from Ontario (ONT) to Barcelona

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 7/27. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BCN
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Ontario to Barcelona

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Barcelona (S37). 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 June 12, 2025.

Round-trip from

$481
(Booking.com)

One-way from

$399
(United Airlines)

Popular in

June

Cheapest in

January

Average price

$1,397
From Ontario to Barcelona
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One-way flight from Ontario to Barcelona
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Highest demand for flights based on searches. 27% potential increase in price ($340 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($46 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Ontario to Barcelona

Cheapest flights from Ontario to Barcelona
Explore the most affordable flight options available from Ontario to Barcelona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Booking.com deal was found by Cheapflights users on 6/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/145:05 amONT - BCN
2 stops19h 15mAir Canada
Fri 10/2412:10 pmBCN - ONT
2 stops17h 14mAir Canada
Deal found 6/11$481
This United Airlines deal was found by Cheapflights users on 6/11. 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 10/51:53 pmONT - BCN
1 stop15h 07mUnited Airlines
Tue 10/143:15 pmBCN - ONT
1 stop16h 15mUnited Airlines
Deal found 6/11$483
This Iberia deal was found by Cheapflights users on 6/10. 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.
Tue 10/288:44 amONT - BCN
2 stops23h 31mIberia
Tue 11/47:55 pmBCN - ONT
2 stops35h 05mIberia
Deal found 6/10$652
This Air Canada deal was found by Cheapflights users on 6/11. 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.
Tue 10/211:15 pmONT - BCN
3 stops33h 35mMultiple Airlines
Fri 10/3112:35 pmBCN - ONT
2 stops32h 02mMultiple Airlines
Deal found 6/11$695
This KLM deal was found by Cheapflights users on 6/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/67:05 amONT - BCN
1 stop15h 10mKLM
Thu 10/211:35 amBCN - ONT
1 stop20h 06mKLM
Deal found 6/10$703
This Delta deal was found by Cheapflights users on 6/10. 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.
Mon 10/2712:00 pmONT - BCN
1 stop35h 40mDelta
Wed 11/510:55 amBCN - ONT
1 stop17h 47mDelta
Deal found 6/10$720
This Priceline deal was found by Cheapflights users on 6/9. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/710:50 amONT - BCN
1 stop14h 20mBritish Airways
Wed 8/2012:20 pmBCN - ONT
1 stop19h 28mBritish Airways
Deal found 6/9$790
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Mon 8/48:15 amONT - BCN
1 stop16h 55mAmerican Airlines
Wed 8/2012:20 pmBCN - ONT
1 stop19h 28mAmerican Airlines
Deal found 6/11$904

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Barcelona 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 June 12, 2025.
Use the filters below to find and compare flights from Ontario to Barcelona that are best for you.

Fly from

Ontario

Fly to

Barcelona

Route

Depart

Return

Price

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 10/14

5:05 am-9:20 am

2 stops19h 15m

Barcelona-El Prat

Fri 10/24

12:10 pm-8:24 pm

2 stops17h 14m

$481

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 10/5

1:53 pm-2:00 pm

1 stop15h 07m

Barcelona-El Prat

Tue 10/14

3:15 pm-10:30 pm

1 stop16h 15m

$483

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 10/28

8:44 am-4:15 pm

2 stops23h 31m

Barcelona-El Prat

Tue 11/4

7:55 pm-10:00 pm

2 stops35h 05m

$652

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 10/21

1:15 pm-7:50 am

3 stops33h 35m

Barcelona-El Prat

Fri 10/31

12:35 pm-12:37 pm

2 stops32h 02m

$695

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 7/6

7:05 am-7:15 am

1 stop15h 10m

Barcelona-El Prat

Thu 10/2

11:35 am-10:41 pm

1 stop20h 06m

$703

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 10/27

12:00 pm-7:40 am

1 stop35h 40m

Barcelona-El Prat

Wed 11/5

10:55 am-7:42 pm

1 stop17h 47m

$720

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Thu 8/7

10:50 am-10:10 am

1 stop14h 20m

Barcelona-El Prat

Wed 8/20

12:20 pm-10:48 pm

1 stop19h 28m

$790

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 8/4

8:15 am-10:10 am

1 stop16h 55m

Barcelona-El Prat

Wed 8/20

12:20 pm-10:48 pm

1 stop19h 28m

$904

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 7/27

5:05 am-7:50 am

2 stops17h 45m

$399

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 10/18

5:05 am-9:20 am

2 stops43h 15m

$406

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 17 results
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Best time to book a flight from Ontario to Barcelona

Have a flexible travel schedule? Discover the best time to fly to Barcelona 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

What is the cheapest month to book a flight from Ontario to Barcelona?

Currently, January is the cheapest month in which you can book a flight from Ontario to Barcelona (average of $523). Flying from Ontario to Barcelona in June is currently the most expensive (average of $1,062). 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. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

It’s typically best to fly out from Ontario to Barcelona 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.

Rainfall in Barcelona by month

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

In terms of precipitation, rainfall in Barcelona 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 when rainfall is around 0.8 in.

Temperature in Barcelona by month

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

If weather is an important factor for your trip to Barcelona, 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

Get insights into the airlines that provide service to Barcelona. 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. Reviews last updated June 12, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and United Airlines from Ontario to Barcelona to help guide your decision. 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
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

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
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

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
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

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
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

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.
Air Canada
7.1
Good
9,531 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

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. 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?

    For a flight from Ontario to Barcelona, you will be flying from Ontario. Ontario (ONT) is just 3.1 mi from the center of the city. Ontario is the only Ontario airport and it handles 0 outbound flights to Barcelona per day. 5 airlines have flights to Barcelona from Ontario on a regular basis.

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

    Currently priced at $481, Air Canada will fly you from Ontario to Barcelona and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Iberia - these airlines can fly you to your destination from $483 and $652, respectively. Air Canada is currently priced 46% below the average price you’ll pay for this route.

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

    One-way options have recently been found by users for as low as $399 on United Airlines. Other airlines that offer cheap prices include Air Canada from $406 and British Airways from $507 one-way.

  • Can I find deals for flights from Ontario to Barcelona that include hotel bookings?

    Yes. In addition to deals on Ontario to Barcelona flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Barcelona?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Barcelona.

  • Can I find deals for business class flights from Ontario to Barcelona?

    Yes. Cheapflights offers flight deals from Ontario to Barcelona 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?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Barcelona (average of $523). Flying from Ontario to Barcelona in June is currently the most expensive (average of $1,062). 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

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Alternative routes for Ontario to Barcelona

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

Discover the top 5 airlines that operate flights from Ontario to Barcelona. 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$544Average$818FlexibilityNo cancel feeOn-time70%
DeltaCheapest$566Average$729FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$582Average$1,032FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$687Average$1,108FlexibilityNo cancel feeOn-time71%
IberiaCheapest$707Average$1,100FlexibilityNo cancel feeOn-time77%

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