ONT - BCN

$401 Find Cheap Flights from Ontario to Barcelona

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Barcelona departing on 8/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Barcelona-El Prat Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Barcelona, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Barcelona, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$964
Typical prices: $920-$717
Multiple Airlines
Thu 8/20Mon 9/7
ONT - BCN • 2 stops
Cheapest one-way
$401
Multiple Airlines
Wed 8/5
ONT - BCN • 2 stops
Top airlines
Cheapest • from $1,060 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Barcelona. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $674 (round-trip)
Shortest trip • 14h 20m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Barcelona!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Barcelona (ONT-BCN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Barcelona that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Barcelona

Thu, Aug 20 - Mon, Sep 7
Multiple Airlines Logo
7:10 am - 4:05 pm
ONT
-
BCN
23h 55m
2 stops
Multiple Airlines Logo
8:00 am - 8:24 pm
BCN
-
ONT
21h 24m
2 stops
$964Multiple Airlines
Thu, Sep 3 - Sat, Sep 12
Multiple Airlines Logo
7:10 am - 4:05 pm
ONT
-
BCN
23h 55m
2 stops
Multiple Airlines Logo
8:00 am - 8:24 pm
BCN
-
ONT
21h 24m
2 stops
$991Multiple Airlines
Sat, Aug 8 - Sat, Aug 22
Multiple Airlines Logo
11:24 pm - 5:35 pm
ONT
-
BCN
33h 11m
2 stops
Multiple Airlines Logo
7:40 am - 11:24 pm
BCN
-
ONT
24h 44m
2 stops
$1,014Multiple Airlines
Mon, Jun 1 - Mon, Jun 8
Multiple Airlines Logo
7:00 am - 4:00 pm
ONT
-
BCN
24h 00m
2 stops
Multiple Airlines Logo
8:00 am - 11:56 pm
BCN
-
ONT
24h 56m
2 stops
$1,022Multiple Airlines
Tue, Oct 6 - Wed, Oct 14
British Airways Logo
7:20 am - 10:10 am
ONT
-
BCN
17h 50m
1 stop
British Airways Logo
1:30 pm - 11:06 pm
BCN
-
ONT
18h 36m
1 stop
$1,060British Airways
Tue, Oct 27 - Tue, Nov 10
American Airlines Logo
12:35 pm - 2:45 pm
ONT
-
BCN
18h 10m
2 stops
American Airlines Logo
10:40 am - 10:23 pm
BCN
-
ONT
20h 43m
1 stop
$1,062American Airlines
Wed, Aug 5 - Wed, Aug 19
Multiple Airlines Logo
11:50 pm - 5:40 pm
ONT
-
BCN
32h 50m
2 stops
Multiple Airlines Logo
7:40 am - 11:24 pm
BCN
-
ONT
24h 44m
2 stops
$1,063Multiple Airlines
Sun, Aug 9 - Wed, Sep 30
British Airways Logo
10:29 am - 10:10 am
ONT
-
BCN
14h 41m
1 stop
British Airways Logo
10:45 am - 6:57 pm
BCN
-
ONT
17h 12m
1 stop
$1,065British Airways
Tue, Oct 27 - Tue, Nov 10
American Airlines Logo
12:35 pm - 2:45 pm
ONT
-
BCN
18h 10m
2 stops
American Airlines Logo
10:40 am - 9:59 pm
BCN
-
ONT
20h 19m
2 stops
$1,067American Airlines
Sun, Nov 1 - Wed, Nov 11
United Airlines Logo
5:00 am - 9:35 am
ONT
-
BCN
19h 35m
2 stops
United Airlines Logo
3:05 pm - 10:26 pm
BCN
-
ONT
16h 21m
1 stop
$1,069United Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Barcelona flights

Get data-powered insights and trends into flights from Ontario to Barcelona to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Ontario to Barcelona-El Prat Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Ontario to Barcelona-El Prat Airport departing in August.

What is the cheapest month to fly from Ontario to Barcelona-El Prat Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Barcelona-El Prat Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Barcelona-El Prat Airport is January, where tickets cost $0 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $1,414 and $1,215 respectively.

Good to know

Low seasonSeptember
Cheapest flight$401
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly with an average 6% increase in price.
Flight from Ontario to Barcelona

When to book flights from Ontario to Barcelona

Are your dates flexible? Find out the best times to travel from Ontario to Barcelona based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Ontario to Barcelona flights

  • What is the cheapest flight from Ontario to Barcelona-El Prat Airport?

    In the last 3 days, the lowest price for a flight from Ontario to Barcelona-El Prat Airport was $401 for a one-way ticket and $964 for a round-trip.

  • Do I need a passport to fly between Ontario and Barcelona?

    Yes

  • Which airports will I be using when flying from Ontario to Barcelona?

    Ontario airport is called Ontario and the only airport in Barcelona is Barcelona-El Prat.

  • Which aircraft models fly most regularly from Ontario to Barcelona?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Barcelona?

    Star Alliance, and oneworld are the airline alliances operating flights between Ontario and Barcelona, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to Barcelona, United Airlines or Iberia?

    The two airlines most popular with KAYAK users for flights from Ontario to Barcelona are United Airlines and Iberia. With an average price for the route of $1,075 and an overall rating of 7.4, United Airlines is the most popular choice. Iberia is also a great choice for the route, with an average price of $737 and an overall rating of 7.0.

  • How does KAYAK find such low prices on flights from Ontario to Barcelona?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Barcelona.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Barcelona?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Barcelona from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Barcelona?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Barcelona with an airline and back to Ontario with another airline. Booking your flights between Ontario and BCN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Barcelona?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Barcelona from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Ontario to Barcelona

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Barcelona. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Barcelona? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9684 reviews
7.3Comfort
8.1Crew
7.1Entertainment
7.7Boarding
6.6Food
Airline reviews

No screens or meal options. Freezing cold. Dirty seats. Left late.

4.0 OkayMaya, May 2026
SFO - IAH
Read more United Airlines reviews

No screens or meal options. Freezing cold. Dirty seats. Left late.

I liked that my son and I were reseated next to each other (we had different bookings). I liked that it was a directg flight and mostly on time. I liked that you provided pillows and blankets. Flight attendants were generally courteous. The messaging through wifi did not work well. The food was not good. Seats are very narrow and I felt slightly claustraphobic in the window seat.

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

Flight itself excellent, but delayed so missed connection & got to destination 2 hrs later

Due to cancellation of connecting flight (Lufthansa) I didn’t fly with United

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

I’m an Iberia fan but this time They dropped the ball. I went from ALC to MAD to LHR. Boarding in ALC was by group… to get you in a bus. Then we sat for almost an hour when most people had connections. When we landed in Madrid we did so and they put us in another bus almost like if they wanted to make people lose their connection. We made ours by the skin of our teeth but our luggage did not. And on top of this we had to listen to the pilot bragging about Iberia being punctual. To be true we made it on time to LHR but we are Still waiting for our luggage

I have to compare it to the AA flight back home. AA was a little better. Perhaps it was that American English is my native tongue. My seat on AA was newer and more comfortable. The food was a little better. The entertainment was much better, more movies worth watching. The sound was lousy on both.

Excellent liked business class except wife’s luggage was lost on 10 Hours connecting flight to Miami and we were priority! 1:20 layover! Expect better From American Airlines partner

In general, I've had excellent experiences with Iberia flights and will continue to use them. In this last flight there were two things that didn't go right. I didn't get the kosher meal I had pre-requested when I had checked in on-line. Things worked out OK as we ended up eating the fish and vegetarian choices, which were really good. The other issue was that some movies for me and my wife started fine but after 8-12 minutes the content just switched to something else. The flight attendant reset our entertainment systems, but the problem persisted. We ended up choosing other movies/TV shows that did work fine.

Awful. They didn't even show concern that her connecting flight( Dallas to Mardrid) was gone/missing. I don't understand how that is even possible. Rudest answer from one of the crew was that American Airlines sold the tickets to somebody else. My daughter was not in the list.

The flight was canceled on a Thursday last minute. I lost thousands of dollars in hotels and car rental

Excellent lie flat seat for premium economy! Great staff. Bad food . Not so great entertainment. My bag didn’t make it either.

Really like the idea experience on this airline I will use again

It wasn’t great because the third-party from Kayak there was just no information about how to check in with Vueling. And the purchase of the ticket from under pricer just made everything really difficult. I’m unlikely to use Kayak again for these reasons.

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

Flight delayed, connection was not at gate listed and so missed, staff were rude at Heathrow, phone tree stupid and difficult, took me 21 actual hours to reach my destination. Almost lost my hotel reservation after walking in a strange city alone after midnight because they would not put me up in a hotel at sfo or heathrow. I will never fly BA again and will tell all people and Instagram followers never to fly BA.

Check-in in SAN was long. ORD was good. Flight delayed On board crew was ok. No warmth or personality. LHrR barely made connection

Wish the food and overall service was better. They treat Business class passengers same as economy

They had us seating down for one hour just waiting on the plane

Flying with BA is always a good experience—even in economy class. It is better if in business and first class. Timely, breeze through security and timely connections

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

Awful it always is unfortunately is the only way to fly direct to london

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

Everything you need to know for your flight from Ontario to Barcelona

Information on your arrival and departure airports