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$458+ 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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BCN
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Round-trip from

$560
(Air Canada)

One-way from

$458
(United Airlines)

Popular in

May

Cheapest in

January

Average price

$970
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. 22% potential increase in price ($251 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 17, 2025.

This Air Canada deal was found by Cheapflights users on 4/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/116:30 pmONT - BCN
2 stops28h 20mMultiple Airlines
Fri 10/241:15 pmBCN - ONT
2 stops32h 17mMultiple Airlines
Deal found 4/15$560
This United Airlines deal was found by Cheapflights users on 4/15. 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 10/71:35 pmONT - BCN
1 stop15h 25mUnited Airlines
Tue 10/214:00 pmBCN - ONT
1 stop15h 52mUnited Airlines
Deal found 4/15$576
This Expedia deal was found by Cheapflights users on 4/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1611:59 pmONT - BCN
1 stop25h 11mBritish Airways
Tue 9/3012:20 pmBCN - ONT
1 stop18h 36mBritish Airways
Deal found 4/16$628
This Trip.com deal was found by Cheapflights users on 4/17. 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.
Wed 9/1710:54 amONT - BCN
1 stop14h 16mIberia
Wed 10/112:20 pmBCN - ONT
1 stop18h 36mIberia
Deal found 4/17$654
This KLM deal was found by Cheapflights users on 4/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/210:59 pmONT - BCN
1 stop24h 41mKLM
Wed 12/1010:55 amBCN - ONT
1 stop17h 47mKLM
Deal found 4/16$776
This Delta deal was found by Cheapflights users on 4/17. 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 5/206:00 amONT - BCN
2 stops24h 40mDelta
Thu 6/511:35 amBCN - ONT
1 stop16h 58mDelta
Deal found 4/17$1,050
This Air Canada deal was found by Cheapflights users on 4/16. 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.
Sat 5/34:15 pmONT - BCN
3 stops30h 35mAir Canada
Mon 5/1212:15 pmBCN - ONT
3 stops33h 23mAir Canada
Deal found 4/16$1,093
This American Airlines deal was found by Cheapflights users on 4/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/610:53 amONT - BCN
1 stop14h 17mAmerican Airlines
Mon 8/412:20 pmBCN - ONT
1 stop15h 39mAmerican Airlines
Deal found 4/16$1,243

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 April 17, 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

Sat 10/11

6:30 pm-7:50 am

2 stops28h 20m

Barcelona-El Prat

Fri 10/24

1:15 pm-12:32 pm

2 stops32h 17m

$560

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 10/7

1:35 pm-2:00 pm

1 stop15h 25m

Barcelona-El Prat

Tue 10/21

4:00 pm-10:52 pm

1 stop15h 52m

$576

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 9/16

11:59 pm-10:10 am

1 stop25h 11m

Barcelona-El Prat

Tue 9/30

12:20 pm-9:56 pm

1 stop18h 36m

$628

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 9/17

10:54 am-10:10 am

1 stop14h 16m

Barcelona-El Prat

Wed 10/1

12:20 pm-9:56 pm

1 stop18h 36m

$654

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 5/20

6:00 am-3:40 pm

2 stops24h 40m

Barcelona-El Prat

Thu 6/5

11:35 am-7:33 pm

1 stop16h 58m

$1,050

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 5/3

4:15 pm-7:50 am

3 stops30h 35m

Barcelona-El Prat

Mon 5/12

12:15 pm-12:38 pm

3 stops33h 23m

$1,093

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Fri 8/15

7:00 am-7:15 am

1 stop15h 15m

Barcelona-El Prat

Wed 9/17

11:35 am-10:41 pm

1 stop20h 06m

$1,120

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 7/6

10:53 am-10:10 am

1 stop14h 17m

Barcelona-El Prat

Mon 8/4

12:20 pm-6:59 pm

1 stop15h 39m

$1,243

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 9/30

7:00 am-9:20 am

1 stop17h 20m

$458

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 9/16

6:36 pm-2:00 pm

1 stop34h 24m

$470

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 18 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 $1,079). 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 April 17, 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.

What is the cheapest day to fly from Ontario to Barcelona?

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

Travelers seeking maximum savings on their Ontario to Barcelona 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 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 April 17, 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
7,916 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

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
7,916 reviews
Delta
8.0
Very good
7,916 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

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
1,327 reviews
Delta
8.0
Very good
7,916 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

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
8,667 reviews
Delta
8.0
Very good
7,916 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

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
7,916 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

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
2,809 reviews
Delta
8.0
Very good
7,916 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

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. 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. 6 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 $576, United Airlines will fly you from Ontario to Barcelona and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from British Airways and Iberia - these airlines can fly you to your destination from $628 and $654, respectively. United Airlines is currently priced 33% 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 $458 on United Airlines. Other airlines that offer cheap prices include KLM from $558 and British Airways from $601 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 $1,079). 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.

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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 6 airlines flying from Ontario to Barcelona

Discover the top 6 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$551Average$824FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$554Average$1,024FlexibilityNo cancel feeOn-time71%
DeltaCheapest$567Average$729FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$582Average$1,037FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$690Average$1,032FlexibilityNo cancel feeOn-time67%
IberiaCheapest$716Average$1,086FlexibilityNo cancel feeOn-time77%

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