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Cheap flights from Ontario to Barcelona from $310

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Barcelona departing on 4/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Barcelona

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
7:30 am - 7:35 am
ONT
-
BCN
15h 05m
1 stop
British Airways Logo
10:45 am - 6:37 pm
BCN
-
ONT
16h 52m
1 stop
$860British Airways
Tue, Apr 14 - Tue, Apr 21
British Airways Logo
7:30 am - 7:35 am
ONT
-
BCN
15h 05m
1 stop
British Airways Logo
10:45 am - 6:37 pm
BCN
-
ONT
16h 52m
1 stop
$861British Airways
Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
1:44 pm - 2:20 pm
ONT
-
BCN
15h 36m
1 stop
United Airlines Logo
4:10 pm - 10:58 pm
BCN
-
ONT
15h 48m
1 stop
$866United Airlines
Tue, Aug 18 - Thu, Sep 10
Multiple Airlines Logo
8:49 am - 4:25 pm
ONT
-
BCN
22h 36m
1 stop
Multiple Airlines Logo
12:30 pm - 11:46 pm
BCN
-
ONT
20h 16m
2 stops
$871Multiple Airlines
Sun, Apr 12 - Mon, Apr 27
British Airways Logo
7:30 am - 7:35 am
ONT
-
BCN
15h 05m
1 stop
British Airways Logo
10:45 am - 6:37 pm
BCN
-
ONT
16h 52m
1 stop
$889British Airways
Sun, Apr 26 - Fri, May 8
Delta Logo
12:57 pm - 12:50 pm
ONT
-
BCN
14h 53m
1 stop
Delta Logo
11:00 am - 6:33 pm
BCN
-
ONT
16h 33m
1 stop
$894Delta
Mon, Apr 6 - Thu, Apr 16
United Airlines Logo
7:00 am - 1:15 pm
ONT
-
BCN
21h 15m
1 stop
United Airlines Logo
12:15 pm - 10:31 pm
BCN
-
ONT
43h 16m
2 stops
$896United Airlines
Thu, Apr 16 - Thu, Apr 23
United Airlines Logo
1:30 pm - 2:20 pm
ONT
-
BCN
15h 50m
1 stop
United Airlines Logo
11:15 am - 10:59 pm
BCN
-
ONT
20h 44m
2 stops
$898United Airlines
Sun, May 10 - Tue, May 19
Delta Logo
12:57 pm - 12:50 pm
ONT
-
BCN
14h 53m
1 stop
Delta Logo
6:20 am - 4:28 pm
BCN
-
ONT
19h 08m
2 stops
$899Delta
Mon, Mar 30 - Wed, Apr 8
United Airlines Logo
7:00 am - 1:15 pm
ONT
-
BCN
21h 15m
1 stop
United Airlines Logo
1:15 pm - 8:36 pm
BCN
-
ONT
40h 21m
2 stops
$901United Airlines
Fri, Apr 17 - Fri, Apr 24

United Airlines flights from Ontario to Barcelona-El Prat Airport

Our best United Airlines deals on Ontario to Barcelona-El Prat Airport flight tickets
United Airlines
Aug 18
ONT1:44 pmOntario
15h 36m
1 stop
BCN2:20 pmBarcelona-El Prat
Sep 10
BCN4:10 pmBarcelona-El Prat
15h 48m
1 stop
ONT10:58 pmOntario
$866
United Airlines
Apr 16
ONT7:00 amOntario
21h 15m
1 stop
BCN1:15 pmBarcelona-El Prat
Apr 23
BCN12:15 pmBarcelona-El Prat
43h 16m
2 stops
ONT10:31 pmOntario
$896
United Airlines
May 10
ONT1:30 pmOntario
15h 50m
1 stop
BCN2:20 pmBarcelona-El Prat
May 19
BCN11:15 amBarcelona-El Prat
20h 44m
2 stops
ONT10:59 pmOntario
$898

Delta flights from Ontario to Barcelona-El Prat Airport

Our best Delta deals on Ontario to Barcelona-El Prat Airport flight tickets
Delta
Apr 6
ONT12:57 pmOntario
14h 53m
1 stop
BCN12:50 pmBarcelona-El Prat
Apr 16
BCN11:00 amBarcelona-El Prat
16h 33m
1 stop
ONT6:33 pmOntario
$894
Delta
Mar 30
ONT12:57 pmOntario
14h 53m
1 stop
BCN12:50 pmBarcelona-El Prat
Apr 8
BCN6:20 amBarcelona-El Prat
19h 08m
2 stops
ONT4:28 pmOntario
$899
Delta
Apr 5
ONT10:25 pmOntario
29h 25m
1 stop
BCN12:50 pmBarcelona-El Prat
Apr 14
BCN11:00 amBarcelona-El Prat
16h 33m
1 stop
ONT6:33 pmOntario
$903

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Barcelona-El Prat Airport 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, momondo users made 832,500 searches. Data last updated March 6, 2026.
Use the filters below to find and compare flights from Ontario to Barcelona-El Prat Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 4/14

7:30 am-7:35 am

1 stop15h 05m

Barcelona-El Prat

Tue 4/21

10:45 am-6:37 pm

1 stop16h 52m

$860

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 4/14

7:30 am-7:35 am

1 stop15h 05m

Barcelona-El Prat

Tue 4/21

10:45 am-6:37 pm

1 stop16h 52m

$861
Quickest round-trip

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 8/18

1:44 pm-2:20 pm

1 stop15h 36m

Barcelona-El Prat

Thu 9/10

4:10 pm-10:58 pm

1 stop15h 48m

$866

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 4/12

8:49 am-4:25 pm

1 stop22h 36m

Barcelona-El Prat

Mon 4/27

12:30 pm-11:46 pm

2 stops20h 16m

$871

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 4/26

7:30 am-7:35 am

1 stop15h 05m

Barcelona-El Prat

Fri 5/8

10:45 am-6:37 pm

1 stop16h 52m

$889

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 4/6

12:57 pm-12:50 pm

1 stop14h 53m

Barcelona-El Prat

Thu 4/16

11:00 am-6:33 pm

1 stop16h 33m

$894

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Thu 4/16

7:00 am-1:15 pm

1 stop21h 15m

Barcelona-El Prat

Thu 4/23

12:15 pm-10:31 pm

2 stops43h 16m

$896

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 5/10

1:30 pm-2:20 pm

1 stop15h 50m

Barcelona-El Prat

Tue 5/19

11:15 am-10:59 pm

2 stops20h 44m

$898

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 3/30

12:57 pm-12:50 pm

1 stop14h 53m

Barcelona-El Prat

Wed 4/8

6:20 am-4:28 pm

2 stops19h 08m

$899

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Fri 4/17

7:00 am-1:15 pm

1 stop21h 15m

Barcelona-El Prat

Fri 4/24

1:15 pm-8:36 pm

2 stops40h 21m

$901

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Barcelona from

How to get the cheapest flight ticket from Ontario to Barcelona-El Prat Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Ontario and Barcelona-El Prat Airport?

What is the cheapest day to depart on your flight to Barcelona-El Prat Airport?

The cheapest day to depart on your flight to Barcelona-El Prat Airport is on a Tuesday when prices can be found for as low as $695. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around $844. These prices are subject to change though, so be sure to set up a Price Alert for flights to Barcelona-El Prat Airport.

What is the cheapest time of day to depart on your flight to Barcelona-El Prat Airport?

Flying to Barcelona-El Prat Airport from Ontario in the evening is the least expensive time of day to depart. momondo users have found prices as low as $801 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,043 on average. Flights to Barcelona-El Prat Airport from Ontario in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Can stopping save me money on Ontario to Barcelona-El Prat Airport flights?

You could potentially save up to 5% on your flight if you consider stops on a Ontario to Barcelona-El Prat Airport flight.

When to book flights from Ontario to Barcelona-El Prat Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Barcelona-El Prat Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Barcelona-El Prat Airport (ONT to BCN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Barcelona-El Prat Airport

Fastest flight time

13h 43m

Direct flights

None
The fastest flight from Ontario to Barcelona-El Prat Airport takes 13h 43m
There are no direct flights from Ontario to Barcelona-El Prat Airport. There are no popular flight routes from Ontario to Barcelona-El Prat Airport.
Search flight deals

  • How far is Ontario to Barcelona-El Prat by plane?

    Barcelona-El Prat is 5972.8 mi away from Ontario. 13h 43m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Ontario Airport to Barcelona-El Prat Airport?

    Prices for flights from Ontario Airport to Barcelona-El Prat Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario Airport to Barcelona-El Prat Airport?

  • How old do you have to be to fly from Ontario Airport to Barcelona-El Prat Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Barcelona-El Prat Airport.

  • What documentation or ID do you need to fly to Barcelona-El Prat Airport?

    The required travel and health documents for your Barcelona-El Prat Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Barcelona-El Prat Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Ontario to Barcelona-El Prat Airport?

Best airlines flying from Ontario to Barcelona-El Prat Airport

Compare and see reviews for airlines that fly from Ontario to Barcelona-El Prat Airport with momondo
Airline
Rating
Free Cancellation
Price
IberiaPriceFrom $605Free CancellationRating
7.0
3,133 reviews
Search Iberia flights
British AirwaysPriceFrom $645Free CancellationRating
6.7
7,778 reviews
Search British Airways flights
United AirlinesPriceFrom $682Free CancellationRating
7.4
9,403 reviews
Search United Airlines flights

Traveling to a place near Barcelona?

Book flights to Barcelona if you plan to visit one of these locations
Lloret de Mar
Sitges
Salou
Tossa de Mar
Tarragona
Castelldefels
El Prat de Llobregat
L'Hospitalet de Llobregat
Calella
Santa Susanna
Cadaques
Cambrils
Pals
Pineda de Mar
Roses
Empuriabrava
Badalona
Malgrat de Mar
Calella de Palafrugell
Palafrugell

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Barcelona?

It is quick and easy to find Ontario to Barcelona flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Barcelona that suits you.

Can I find flights from Ontario to Barcelona with flexible booking policies on momondo?

All flight searches from Ontario to Barcelona on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Barcelona?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Barcelona.

I’m not ready to book a flight from Ontario to Barcelona right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Barcelona flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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