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$418+ 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
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Round-trip from

$542
(Delta)

One-way from

$418
(Priceline)

Popular in

May

Cheapest in

January

Average price

$1,205
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 ($244 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This Delta deal was found by Cheapflights users on 4/29. 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.
Sat 9/2010:59 pmONT - BCN
1 stop23h 16mDelta
Thu 10/29:30 amBCN - ONT
1 stop19h 12mDelta
Deal found 4/29$542
This Travelocity deal was found by Cheapflights users on 4/29. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/233:00 pmONT - BCN
2 stops20h 25mIberia
Fri 10/312:20 pmBCN - ONT
1 stop18h 36mIberia
Deal found 4/29$545
This United Airlines deal was found by Cheapflights users on 4/30. 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 9/285:10 amONT - BCN
2 stops17h 40mUnited Airlines
Tue 10/74:00 pmBCN - ONT
1 stop15h 52mUnited Airlines
Deal found 4/30$582
This Air Canada deal was found by Cheapflights users on 4/30. 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.
Fri 9/196:00 amONT - BCN
2 stops16h 50mMultiple Airlines
Fri 10/312:10 pmBCN - ONT
2 stops17h 23mMultiple Airlines
Deal found 4/30$632
This KLM deal was found by Cheapflights users on 4/29. 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.
Wed 9/245:05 pmONT - BCN
2 stops16h 45mKLM
Thu 10/26:20 amBCN - ONT
2 stops19h 57mKLM
Deal found 4/29$667
This Booking.com deal was found by Cheapflights users on 4/30. 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 8/1910:50 amONT - BCN
1 stop14h 20mBritish Airways
Wed 9/1012:20 pmBCN - ONT
1 stop18h 36mBritish Airways
Deal found 4/30$688
This Virgin Atlantic deal was found by Cheapflights users on 4/30. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/237:05 amONT - BCN
1 stop17h 15mVirgin Atlantic
Wed 8/1311:35 amBCN - ONT
2 stops21h 08mVirgin Atlantic
Deal found 4/30$967
This Air Canada deal was found by Cheapflights users on 4/30. 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.
Fri 7/186:39 pmONT - BCN
2 stops52h 11mAir Canada
Tue 8/1212:10 pmBCN - ONT
2 stops38h 33mAir Canada
Deal found 4/30$1,000
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Thu 6/510:54 amONT - BCN
1 stop14h 16mAmerican Airlines
Wed 6/1812:20 pmBCN - ONT
1 stop15h 41mAmerican Airlines
Deal found 4/30$1,209

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 May 1, 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 9/20

10:59 pm-7:15 am

1 stop23h 16m

Barcelona-El Prat

Thu 10/2

9:30 am-7:42 pm

1 stop19h 12m

$542

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 9/23

3:00 pm-8:25 pm

2 stops20h 25m

Barcelona-El Prat

Fri 10/3

12:20 pm-9:56 pm

1 stop18h 36m

$545

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 9/28

5:10 am-7:50 am

2 stops17h 40m

Barcelona-El Prat

Tue 10/7

4:00 pm-10:52 pm

1 stop15h 52m

$582

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Fri 9/19

6:00 am-7:50 am

2 stops16h 50m

Barcelona-El Prat

Fri 10/3

12:10 pm-8:33 pm

2 stops17h 23m

$632

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 9/24

5:05 pm-6:50 pm

2 stops16h 45m

Barcelona-El Prat

Thu 10/2

6:20 am-5:17 pm

2 stops19h 57m

$667

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 8/19

10:50 am-10:10 am

1 stop14h 20m

Barcelona-El Prat

Wed 9/10

12:20 pm-9:56 pm

1 stop18h 36m

$688

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 7/23

7:05 am-9:20 am

1 stop17h 15m

Barcelona-El Prat

Wed 8/13

11:35 am-11:43 pm

2 stops21h 08m

$967

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Fri 7/18

6:39 pm-7:50 am

2 stops52h 11m

Barcelona-El Prat

Tue 8/12

12:10 pm-5:43 pm

2 stops38h 33m

$1,000

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 7/22

10:53 am-10:10 am

1 stop14h 17m

Barcelona-El Prat

Thu 8/14

12:20 pm-10:14 pm

1 stop18h 54m

$1,175

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 9/30

10:54 am-10:10 am

1 stop14h 16m

$418

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 20 results
1
2

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 $1,064). 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 May 1, 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 May 1, 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
7,934 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

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
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

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
1,334 reviews
Delta
8.0
Very good
7,934 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

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
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

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.
Virgin Atlantic
7.4
Good
643 reviews
Delta
8.0
Very good
7,934 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

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
7,934 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

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 $542, Delta will fly you from Ontario to Barcelona and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Iberia and United Airlines - these airlines can fly you to your destination from $545 and $582, respectively. Delta is currently priced 37% 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 $418 on British Airways. Other airlines that offer cheap prices include United Airlines from $438 and Iberia from $493 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 $1,064). 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$554Average$1,024FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$564Average$876FlexibilityNo cancel feeOn-time70%
DeltaCheapest$566Average$729FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$583Average$1,010FlexibilityNo cancel feeOn-time69%
IberiaCheapest$716Average$1,100FlexibilityNo cancel feeOn-time77%

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