ONT - BCN

$362 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 9/22. 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
$827
Typical prices: $1,196-$893
Air France, KLM
Wed 10/7Sun 10/18
ONT - BCN • 2 stops
Cheapest one-way
$362
KLM
Tue 9/22
ONT - BCN • 1 stop
Top airlines
Cheapest • from $873 (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 $682 (round-trip)
Shortest trip • 14h 50m (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

Wed, Oct 7 - Sun, Oct 18
Multiple Airlines Logo
12:00 pm - 2:50 pm
ONT
-
BCN
17h 50m
2 stops
Multiple Airlines Logo
1:20 pm - 10:43 pm
BCN
-
ONT
18h 23m
1 stop
$827Multiple Airlines
Wed, Oct 7 - Sun, Oct 18
Multiple Airlines Logo
12:00 pm - 3:35 pm
ONT
-
BCN
18h 35m
2 stops
Multiple Airlines Logo
6:20 am - 5:17 pm
BCN
-
ONT
19h 57m
2 stops
$832Multiple Airlines
Tue, Nov 10 - Wed, Nov 18
British Airways Logo
10:47 am - 8:50 am
ONT
-
BCN
13h 03m
1 stop
British Airways Logo
10:40 am - 6:22 pm
BCN
-
ONT
16h 42m
1 stop
$873British Airways
Wed, Aug 12 - Wed, Aug 19
Multiple Airlines Logo
10:29 am - 10:10 am
ONT
-
BCN
14h 41m
1 stop
Multiple Airlines Logo
1:50 pm - 9:45 pm
BCN
-
ONT
40h 55m
2 stops
$875Multiple Airlines
Sun, Oct 18 - Thu, Oct 29
Delta Logo
12:00 pm - 2:50 pm
ONT
-
BCN
17h 50m
2 stops
Delta Logo
10:50 am - 10:14 pm
BCN
-
ONT
19h 24m
1 stop
$877Delta
Sun, Oct 18 - Wed, Oct 28
Delta Logo
7:00 am - 12:50 pm
ONT
-
BCN
20h 50m
1 stop
Delta Logo
6:00 am - 11:48 pm
BCN
-
ONT
25h 48m
2 stops
$878Delta
Mon, Oct 19 - Wed, Oct 28
Delta Logo
10:59 pm - 9:00 am
ONT
-
BCN
25h 01m
2 stops
Delta Logo
6:00 am - 11:48 pm
BCN
-
ONT
25h 48m
2 stops
$882Delta
Sat, Oct 17 - Thu, Oct 29
Delta Logo
5:05 pm - 3:35 pm
ONT
-
BCN
37h 30m
2 stops
Delta Logo
10:50 am - 10:14 pm
BCN
-
ONT
19h 24m
1 stop
$883Delta
Mon, Oct 19 - Fri, Oct 30
Delta Logo
12:00 pm - 12:50 pm
ONT
-
BCN
15h 50m
1 stop
Delta Logo
6:00 am - 4:12 pm
BCN
-
ONT
18h 12m
2 stops
$885Delta
Tue, Sep 22 - Tue, Oct 6
British Airways Logo
2:22 pm - 6:40 pm
ONT
-
BCN
19h 18m
2 stops
British Airways Logo
10:15 am - 9:08 pm
BCN
-
ONT
19h 53m
2 stops
$887British Airways
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 October.

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 July, where the average cost of round-trip tickets is $1,384 and $1,373 respectively.

Good to know

Low seasonSeptember
Cheapest flight$362
Best time to beat the crowds with an average 37% drop in price.
Most popular time to fly with an average 3% 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 5 days, the lowest price for a flight from Ontario to Barcelona-El Prat Airport was $362 for a one-way ticket and $827 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 $1,102 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 9842 reviews
6.6Food
8.1Crew
7.1Entertainment
7.3Comfort
7.7Boarding
Airline reviews

I was promised by United Airline (operated by ANA) that I will be seated together with my kids as I am the only adult flying with two minors. We did not get seats together in our 11 hours flight from LA to Tokyo. When asked at the gate, ANA representative said United Airline should have informed them that there is a parent flying with two minors. He said they can’t do anything in the system as the flight is full. He ask me to ask passengers next to me and the kids if they are willing to change seats. This is ridiculous! However, I went in the flight and asked other passages but no one willing to change seats. 11 hours and we were seating separately. I was very disappointed with this. It made things super inconvenient for me.

2.0 MediocreAnonymous, Jun 2026
LAX - NRT
Read more United Airlines reviews

I was promised by United Airline (operated by ANA) that I will be seated together with my kids as I am the only adult flying with two minors. We did not get seats together in our 11 hours flight from LA to Tokyo. When asked at the gate, ANA representative said United Airline should have informed them that there is a parent flying with two minors. He said they can’t do anything in the system as the flight is full. He ask me to ask passengers next to me and the kids if they are willing to change seats. This is ridiculous! However, I went in the flight and asked other passages but no one willing to change seats. 11 hours and we were seating separately. I was very disappointed with this. It made things super inconvenient for me.

Service was professional and quick. Premium economy seat was comfortable given the class

It was perfect! United Airlines staff was extremely caring, super friendly and professional

The staff was extremely helpful and friendly at all times! They went above and beyond to get us into an earlier flight in San Diego to make our connection in SFO possible, because our original flight did actually not make it! I did so much appreciate the UA team and how they made this possible. We also didn’t have seats together on the long flight to Singapore, but they found us seats together last moment with no additional cost! Nobody sat next to us, so that we were able to sleep! Thanks to UA for improving their service and Underpricer for booking this trip! Please be careful: 1,5 hrs for transfer in San Francisco might not be enough time in the future

Over 2.5 hour maintenance delay on first morning flight with no acknowledgement, compensation or even gesture of good will. Aircraft had overnighted at airport so issue should have been addressed prior to boarding. Over 3.5 hours before first slow and deliberate beverage service.

United has maintenance issues and can then never recover. No operations ability and simple issues always turn into multiple hours long cascading delays. Worst airline on earth.

I paid for a confirmed upgraded aisle seat and was moved to a center seat in the back of the plane at the last minute.

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

Flight was delayed but more than 90 minutes. This caused me to miss my available windows for pick-up by a friend. I had to pay $125 for an uber back home from the airport which was an added expense that I had not budgeted for my trip. Staff was friendly.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

Terrible boarding procedures in Madrid. The airplane barely has any legroom and I am 68 inches.

Not bad but they lost 2 of my bags when I got to Florence

Couldn’t get boarding passes online, delayed an hour, and smallest amount of space on board I’ve ever encountered for such a long flight.

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.

Canceled flight late London to Florence. Help at airport very poor. Treated poorly. Had to sleep in the airport. Lost bags- still do not have them. Horrible. I should be reimbursed!

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

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

Information on your arrival and departure airports