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ONT - BCN

Find cheap flights from Ontario to Barcelona from $416

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 5/9. 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
0 bags
Sun 5/26
Sun 6/2

Search hundreds of travel sites at once for deals on flights to Barcelona

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Barcelona.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Barcelona.
In the last 7 days travelers have searched 44,335,567 times on KAYAK, and here is why:

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Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
7:40 am - 2:00 pmONT-BCN
21h 20m1 stop
12:25 pm - 9:02 pmBCN-ONT
41h 37m2 stops
$797United Airlines
Find Deal
Wed, Aug 21 - Wed, Sep 11
7:40 am - 10:25 amONT-BCN
17h 45m2 stops
12:25 pm - 5:22 pmBCN-ONT
37h 57m2 stops
$803United Airlines
Find Deal
Wed, Aug 21 - Wed, Sep 11
2:00 pm - 5:10 pmONT-BCN
18h 10m2 stops
11:25 am - 10:28 pmBCN-ONT
20h 03m1 stop
$816Delta
Find Deal
Wed, Sep 18 - Fri, Sep 27
2:00 pm - 5:10 pmONT-BCN
18h 10m2 stops
8:55 am - 10:33 pmBCN-ONT
22h 38m2 stops
$821Delta
Find Deal
Wed, Sep 18 - Fri, Sep 27
12:45 pm - 3:50 pmONT-BCN
18h 05m2 stops
10:15 am - 9:42 pmBCN-ONT
20h 27m2 stops
$833British Airways
Find Deal
Wed, Aug 7 - Wed, Aug 21
12:43 pm - 5:20 pmONT-BCN
19h 37m2 stops
9:15 am - 11:26 pmBCN-ONT
23h 11m2 stops
$836Iberia
Find Deal
Sat, Aug 3 - Mon, Aug 26
12:43 pm - 8:20 pmONT-BCN
22h 37m2 stops
9:05 pm - 11:26 pmBCN-ONT
35h 21m2 stops
$848Iberia
Find Deal
Sat, Aug 3 - Sun, Aug 25
12:45 pm - 3:50 pmONT-BCN
18h 05m2 stops
10:15 am - 11:26 pmBCN-ONT
22h 11m2 stops
$860British Airways
Find Deal
Wed, Sep 18 - Wed, Sep 25
10:39 am - 1:00 pmONT-BCN
17h 21m2 stops
12:50 pm - 10:59 pmBCN-ONT
19h 09m2 stops
$1,021American Airlines
Find Deal
Tue, May 28 - Tue, Jun 11
6:00 am - 12:00 pmONT-BCN
21h 00m1 stop
12:50 pm - 10:59 pmBCN-ONT
19h 09m2 stops
$1,023American Airlines
Find Deal
Tue, May 28 - Tue, Jun 11

Flights from Ontario to Barcelona - Travel Insights & Trends

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.

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 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 February, where tickets cost $503 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $1,388 and $1,344 respectively.

How far in advance should I book a flight from Ontario to Barcelona-El Prat Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Ontario to Barcelona-El Prat Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Ontario to Barcelona-El Prat Airport, you should book around 2 days before departure. For the absolute cheapest price, our data suggests you should book 20 days before departure.

Which airlines provide the cheapest flights from Ontario to Barcelona?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Ontario to Barcelona found on KAYAK was with KLM for $703. United Airlines proposed a round-trip connection from $797 and Delta from $816.

Good to know

Low season

August

High season

March

Cheapest flight

$416
Best time to beat the crowds but there is an average 43% increase in price.
Most popular time to fly and prices are also 7% lower on average.
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 $416 for a one-way ticket and $797 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?

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

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

    The two airlines most popular with KAYAK users for flights from Ontario to Barcelona are Delta and United Airlines. With an average price for the route of $994 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $983 and an overall rating of 7.4.

  • 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.

See more FAQs

Top 5 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.
8.0
DeltaOverall score based on 10966 reviews
7.4food
8.6crew
8.2boarding
8.0entertainment
7.9comfort
Airline reviews

There was a loud squeaky sound the whole time we were flying.

6.0 GoodEliza, Apr 2024SAN - LAX
Read more about Delta reviews

There was a loud squeaky sound the whole time we were flying.

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

Honestly, I didn’t expect that I will experience this long time wait during the check in. There was only one person who was taking care of the passengers for the economy class and it took us to wait about one hour to do our check i. As a result we barely get to the airplane as the gate was at the end of the airport. That is totally not professional where one crue is working at the registration desk with economy and 3-4 crues are helping for the business class.

Like most domestic flights in the US, you are basically on your own with this airline when it comes to food, so be sure to purchase meals and drinks ahead of time or expect to arrive starving and dehydrated (like I was).

You need to be a hacker to get the (Free) WiFi

Due to one crew member not showing up to work, our flight was significantly delayed causing us to miss our connecting flight in Houston to Mississippi causing us to be delayed by more than 6 hours and missing our event all together. Very disappointing. All because ONE crew member called in sick. United did grant us a $15 meal voucher, which was a small but appreciated concession that I wasn’t able to use because I ordered my lunch and paid for it before applying the concession, and the staff said it was too late to use it. Ugh! We also had a TWO delay coming back from Mississippi, but that was on American Airlines and it was due to weather, so not their fault. Anyway, not at all impressed with United’s handling of our flight and the HUGE disappointment of missing our important family event for our 90 year old mother. All that money and all that stress and emotions for nothing. Having to wait the hour to bring an employee from LAX seemed like something that should not have happened. Why don’t you have a local back-up? Santa Ana is not a little airport in a rural area.

Hated every minute of it. This flight should have only taken 1.5hrs but was delayed over 10hours. Now I am being told I cannot be compensated or refunded my ticket price or extra leg room, which I purchased but did not receive, because the airline is throwing the blame on the 3rd party I purchased tickets through and 3rd party putting the blame on airline. No one wants to help. They received their money and that's all they care about. Im going on 3 days of still trying to get to my final destination, had to cancel car rental, car insurance and hotel. Currently staying in airport until hotels open up. Thank you Lufthansa, Kayak, Underpricer and United for making this trip the worst ever.

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.

Awful. I got stuck next to a person carrying a dog and behind someone with a dog. People need to board these dogs downstairs. The cabin is crowded enough with your pets

Packed in like sardines, very uncomfortable. Sitting the aisle my shoulder was rammed into numerous times by rushing flight attendants. Also flight was very cold.

the head jack on my seat didn't work and the power outlet didn't work for my seat

Beverage and food services are excellent. We enjoy paying the extra for economy plus for the 3 inches more leg room to be exact.

Left 2 hours later for delayed I had to take care a kid with special need since people don’t want to move to accommodate the rest of the family. . It wasn’t bad but that made me upset that people can be that selfish.

Flight was delayed by 3 hours. The pilot made up 1 hour during the flight, but that made the wait at the airport 5 hours once you factor getting there 2 hours early.

Not sure why JAL partnered with American Airlines because their service is no where near similar. Flight attendants were not friendly and didn’t smile. Food was horrible…

Seriously, not displaying departure gate until very last minute is awful. Specially when you have to take an elevator and then transport to go to the sub-terminal. That’s awful in such a busy airport as Heathrow. And I cannot choose seat on this flight because it’s run by British Airways, even entering locator code.

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Comfort of seats, ease of boarding. Food selection could be better

Food options were limited which is absolutely embarrassing for a Flight of this size The staff did not come around as much and I am not accustomed to such poor service from American Airlines Drinks I believe were limited to soda and water

Crew were attentive and friendly. Flight was smooth and early! I enjoyed the less crowded plane. Thank you!

We are gluten free, there were not any available complimentary gluten free options.

No meal on a cross country flight? SFO-MiA is pretty much the definition of a coast to coast flight. No meal provided. Sky high wi-fi rates too. Stop nickel and diming your customers.

The staff was unprofessional and didn’t communicate very well. The boarding process was very disheveled, potentially due to a power outage the previous day but there was no contingency plan to properly get passengers boarded the following day. Once boarded the aircraft stayed on the tarmac for over 45 minutes due to high winds. The communication was sporadic but an announcement was finally made an additional 30 minutes later that the flight was cancelled but we couldn’t get off the plane. Prior to deplaning one of the gate agents came on the plane and made an announcement for everyone to pickup their checked bags and take a card to rebook a new reservation because they didn’t have adequate staff. Flights were missed, passengers went to different airports and there was little to no assistance from AA.

You cancelled my flight by email then made it very difficult to get in contact with you. Then put me in a flight with a long layover in Mexico returning to the wrong airport in uk. Mind blowing my stressful. I missed see my grand dad because of you.

Flight was delayed by well over an hour. Communication was terrible.

I like the team but I don't like the food you provided with money. I want free food and free water.

An average flight experience. For our transatlantic portion, they provided a main meal and two snacks. However, the food was not very tasty and the drinks far too small and infrequent for such a long flight. The regrettable part of the flight was that the toilets were extremely filthy. I feel this is unacceptable.

Both flights were delayed. I lost my connection on the way back. No voucher or anything was givenx I had business ticket and no support to make it on time. I got to the door running 5 min after they close. Food really bad. Breakfast in business was worst that I what I remember in economy. Even though I have accumulated many miles, I don’t think Inwill keep buying Iberia. I am a frequent business traveler.

The food is really eco only level. Breakfast was shameful. I am considering to stop flying with Iberia. Business prices are as expensive as other companies with much better service.

Why no entertainment? Also water should be free, it is basic human right.

Late boarding. Delayed departure leading to rushed connection at Madrid Barajas. Not necessarily Iberia's fault but delay loading cargo didn't help.

I can’t comment on food as it was necessary to buy it. No entertainment.

Took too long to tak off but besides that it was good

They made my flight a disaster they had me pay for bags that I already paid for through Iberia airlines and the hostesses were super mean and racist they just turned my vacation to a total nightmare and disappointment in fact they even had me rethink even no to go to morroco ever again even if my whole stay at the country was so nice and fun and perfect but anything at the airport and with the airline was a disaster do not recommend will never take a flight with them

We paid to have overhead carry-on baggage. When we got to the gate we were told that our carry on bags would need to be checked and go below because the flight was full. Notably we were nowhere near the last people to board and about 30 other passengers also had to check their carry-on bags. Other than that the flight was fine.

Crew were very friendly and helpful. They explained to us in detail the delay in our takeoff due to the storm that rolled in from Belfast and did their best to make up the time. Always great to fly BA!

Not sure if the crew were experiencing something unknown to me,but the service of passing water was non-existent.In addition,please take consideration when providing yogurt as alternative for breakfast as some of us, could be lactose intolerant.. thanks

This was an American Airlines flight. The crew were very unhappy and quite grumpy. Abrupt to the point of being rude. The food was dreadful. Indeed the breakfast was in edible. I will avoid AA at all costs in the future.

We have business class seats from Los Angeles to London. The crew is friendly and provided great service. The flight was very comfortable and very smooth. Will use this airlines again in the future.

Asked for a wheelchair multiple times. Got denied the wheelchair in London layover.

No entertainment available on flight. Seating too cramped fir an average adult.

Flight delayed Got bags after 5 days Delivery of bags was done 500 meters as driver did not want to go into my street

It was below average experience overall. They did not have my food choice which was selected a month ago for 8+ hour flight. After landing I waited to collect my bag but my bag did not come and I wasn’t told it was delayed or lost. I had to find someone to help me to locate it and it was sent through next flight. Overall I would say at wasn’t very good experience

Great service and air hostesses, took care of all activities very well and smooth

Book cheap flights from Ontario to Barcelona

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Ontario to Barcelona found on KAYAK in the last 72 hours.
5/9Thu
2 stops
38h 51mONT-BCN
$416
5/9Thu
3 stops
43h 58mONT-BCN
$508
7/21Sun
1 stopIberia
14h 17mONT-BCN
$712
9/17Tue
2 stopsAmerican Airlines
22h 45mONT-BCN
$723
7/21Sun
1 stopBritish Airways
14h 17mONT-BCN
$724
9/22Sun
2 stopsAmerican Airlines
22h 45mONT-BCN
$728
8/3Sat
1 stopIberia
36h 20mONT-BCN
$729
9/18Wed
2 stopsBritish Airways
18h 05mONT-BCN
$755
6/3Mon
1 stopDelta
26h 10mONT-BCN
$871
6/1Sat
1 stopDelta
18h 10mONT-BCN
$898

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Last minute flights from Ontario to Barcelona

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Ontario to Barcelona that are departing in the next 10 days.
4/29Mon
multi-stopIberia
17h 47mONT-BCN
5/1Wed
multi-stopIberia
19h 02mBCN-ONT
$1,195
4/28Sun
multi-stop
25h 34mONT-BCN
5/3Fri
multi-stop
36h 09mBCN-ONT
$1,973
4/28Sun
multi-stopIberia
18h 38mONT-BCN
5/9Thu
multi-stopIberia
19h 01mBCN-ONT
$1,976
4/28Sun
multi-stopIberia
14h 07mONT-BCN
5/1Wed
multi-stopIberia
32h 04mBCN-ONT
$1,992
4/28Sun
multi-stopAmerican Airlines
18h 17mONT-BCN
5/3Fri
multi-stopAmerican Airlines
19h 02mBCN-ONT
$2,060
4/28Sun
multi-stop
22h 09mONT-BCN
5/3Fri
multi-stop
18h 19mBCN-ONT
$2,070
4/27Sat
multi-stopAmerican Airlines
16h 14mONT-BCN
5/2Thu
multi-stopAmerican Airlines
19h 02mBCN-ONT
$2,120
4/27Sat
multi-stopVirgin Atlantic
18h 10mONT-BCN
5/12Sun
multi-stopVirgin Atlantic
21h 18mBCN-ONT
$2,154
4/30Tue
multi-stopAvianca
24h 30mONT-BCN
5/3Fri
multi-stopAvianca
41h 00mBCN-ONT
$2,670
4/28Sun
multi-stopAvianca
24h 30mONT-BCN
5/1Wed
multi-stopAvianca
41h 00mBCN-ONT
$2,776

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Ontario - Barcelona Flights

Departure:

Ontario (ONT)United States

Destination:

Barcelona (BCN)Spain

Return flight deals:

Barcelona - Ontario

Cabin classes: