Barcelona

$364+ 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 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BCN
Jul 9 — Jul 161
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Cheap 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 9, 2026.

This KLM deal was found by Cheapflights users on 6/7. 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 10/47:05 am
ONT
-
BCN
1 stop20h 45m
KLM
Fri 10/91:20 pm
BCN
-
ONT
1 stop18h 23m
KLM
Deal found 6/7$873
This Delta deal was found by Cheapflights users on 6/7. 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 10/46:00 am
ONT
-
BCN
2 stops23h 50m
Delta
Fri 10/911:00 am
BCN
-
ONT
1 stop20h 14m
Delta
Deal found 6/7$877
This American Airlines deal was found by Cheapflights users on 6/8. 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.
Wed 9/3010:25 am
ONT
-
BCN
2 stops16h 35m
American Airlines
Thu 10/810:45 am
BCN
-
ONT
2 stops19h 23m
American Airlines
Deal found 6/8$878
This American Airlines deal was found by Cheapflights users on 6/7. 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 10/48:25 am
ONT
-
BCN
1 stop16h 45m
American Airlines
Fri 10/912:30 pm
BCN
-
ONT
2 stops19h 36m
American Airlines
Deal found 6/7$884
This Condor deal was found by Cheapflights users on 6/7. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2710:54 am
ONT
-
BCN
2 stops26h 16m
Multiple Airlines
Tue 8/118:00 am
BCN
-
ONT
2 stops21h 55m
Multiple Airlines
Deal found 6/7$886
This British Airways deal was found by Cheapflights users on 6/4. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/222:22 pm
ONT
-
BCN
2 stops19h 18m
British Airways
Tue 10/67:40 am
BCN
-
ONT
2 stops22h 28m
British Airways
Deal found 6/4$887
This Booking.com deal was found by Cheapflights users on 6/7. 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.
Mon 8/1010:54 am
ONT
-
BCN
2 stops26h 16m
Multiple Airlines
Thu 9/38:00 am
BCN
-
ONT
2 stops21h 24m
Multiple Airlines
Deal found 6/7$890
This British Airways deal was found by Cheapflights users on 6/4. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/238:25 am
ONT
-
BCN
2 stops17h 35m
British Airways
Tue 10/61:30 pm
BCN
-
ONT
1 stop18h 36m
British Airways
Deal found 6/4$891
This Iberia deal was found by Cheapflights users on 6/8. 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.
Wed 9/3010:25 am
ONT
-
BCN
1 stop14h 45m
Iberia
Thu 10/81:30 pm
BCN
-
ONT
1 stop18h 36m
Iberia
Deal found 6/8$893
This Trip.com deal was found by Cheapflights users on 6/7. 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 9/308:25 am
ONT
-
BCN
1 stop16h 45m
Iberia
Wed 10/71:30 pm
BCN
-
ONT
1 stop18h 36m
Iberia
Deal found 6/7$903
This Trip.com deal was found by Cheapflights users on 6/7. 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.
Sun 9/2010:25 am
ONT
-
BCN
1 stop14h 45m
Iberia
Tue 10/61:30 pm
BCN
-
ONT
1 stop16h 38m
Iberia
Deal found 6/7$904

Find 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 9, 2026.

Round-trip from

$873
(KLM)

One-way from

$364
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$1,384
From Ontario to Barcelona
One-way flight from Ontario to Barcelona
Highest demand for flights based on searches. 13% potential increase in price ($161 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
Average for round-trip flights in June 2026

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 9, 2026.
Use the filters below to find and compare flights from Ontario to Barcelona that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 9/23

8:25 am-11:00 am

2 stops17h 35m

Barcelona-El Prat

Tue 10/6

1:30 pm-11:06 pm

1 stop18h 36m

$891

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Fri 10/30

10:59 pm-8:35 am

2 stops25h 36m

Barcelona-El Prat

Sun 11/8

10:50 am-11:48 pm

2 stops21h 58m

$978
Quickest round-trip

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Fri 10/2

1:49 pm-2:20 pm

1 stop15h 31m

Barcelona-El Prat

Sat 10/10

3:15 pm-10:26 pm

1 stop16h 11m

$1,065

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Fri 8/14

10:29 am-10:10 am

1 stop14h 41m

Barcelona-El Prat

Sat 8/22

10:45 am-6:58 pm

1 stop17h 13m

$1,094

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 7/27

1:50 pm-8:00 am

3 stops33h 10m

Barcelona-El Prat

Tue 8/11

11:15 am-8:53 pm

2 stops42h 38m

$1,252

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 8/1

6:20 am-11:10 am

1 stop19h 50m

Barcelona-El Prat

Sat 8/15

6:20 am-10:45 pm

2 stops25h 25m

$1,277

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 7/22

7:05 am-9:00 am

2 stops16h 55m

Barcelona-El Prat

Wed 8/5

6:20 am-5:21 pm

2 stops20h 01m

$1,398

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 8/17

11:50 pm-10:45 am

2 stops49h 55m

Barcelona-El Prat

Sun 8/23

7:40 am-11:24 pm

2 stops24h 44m

$1,432

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Fri 8/28

10:29 am-10:10 am

1 stop14h 41m

Barcelona-El Prat

Sun 9/6

10:45 am-6:47 pm

1 stop17h 02m

$1,493

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 8/1

1:50 pm-2:20 pm

1 stop15h 30m

Barcelona-El Prat

Sat 8/15

3:15 pm-10:35 pm

1 stop16h 20m

$1,520

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/4

Showing 1-10 of 22 resultsSorted by cheapest first
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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

How much does it cost to fly round-trip from Ontario to Barcelona?

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 9, 2026.
Peruse reviews from past customers who have flown with United Airlines,Iberia, andBritish Airways 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.

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

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

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

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

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

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

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Comfort

7.3

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. 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. 3 airlines have flights to Barcelona from Ontario on a regular basis.

  • How long is the flight from Ontario to Barcelona?

    Airlines like British Airways, Delta, and United Airlines fly from Ontario to Barcelona in about 15h 31m. The time it takes to get you to your destination can typically vary by up to 10h 05m. Ontario and Barcelona are separated by a distance of 5971 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Currently priced at $587, Iberia will fly you from Ontario to Barcelona and back. In addition to Iberia, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and British Airways - these airlines can fly you to your destination from $714 and $747, respectively. Iberia is currently priced 43% below the average price you’ll pay for this route.

  • 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.

See more FAQs

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Top 3 airlines flying from Ontario to Barcelona

Discover the top 3 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 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$587Average$737FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$714Average$1,102FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$747Average$969FlexibilityNo cancel feeOn-time70%

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