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Cheap flights from Ontario to Barcelona from $368

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 8/18. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Barcelona

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:54 am - 10:10 pm
ONT
-
BCN
26h 16m
2 stops
Multiple Airlines Logo
8:00 am - 9:45 pm
BCN
-
ONT
22h 45m
2 stops
$830Multiple Airlines
Mon, Aug 17 - Thu, Aug 27
United Airlines Logo
6:46 am - 1:15 pm
ONT
-
BCN
21h 29m
1 stop
United Airlines Logo
1:35 pm - 6:29 pm
BCN
-
ONT
37h 54m
2 stops
$853United Airlines
Sun, Nov 8 - Thu, Nov 12
United Airlines Logo
6:46 am - 9:35 am
ONT
-
BCN
17h 49m
2 stops
United Airlines Logo
1:35 pm - 6:29 pm
BCN
-
ONT
37h 54m
2 stops
$856United Airlines
Sun, Nov 8 - Thu, Nov 12
United Airlines Logo
7:00 am - 2:25 pm
ONT
-
BCN
22h 25m
2 stops
United Airlines Logo
12:15 pm - 10:49 pm
BCN
-
ONT
43h 34m
2 stops
$860United Airlines
Wed, Oct 7 - Wed, Oct 21
Air Canada Logo
5:00 am - 9:20 am
ONT
-
BCN
19h 20m
2 stops
Air Canada Logo
12:15 pm - 8:58 pm
BCN
-
ONT
41h 43m
2 stops
$861Air Canada
Sun, Oct 18 - Thu, Oct 22
Iberia Logo
10:25 am - 10:10 am
ONT
-
BCN
14h 45m
1 stop
Iberia Logo
10:40 am - 6:44 pm
BCN
-
ONT
16h 04m
1 stop
$863Iberia
Wed, Oct 21 - Thu, Oct 29
Delta Logo
11:56 am - 11:10 am
ONT
-
BCN
14h 14m
1 stop
Delta Logo
1:20 pm - 10:43 pm
BCN
-
ONT
18h 23m
1 stop
$873Delta
Tue, Oct 6 - Wed, Oct 14
United Airlines Logo
1:52 pm - 2:20 pm
ONT
-
BCN
15h 28m
1 stop
United Airlines Logo
6:40 am - 8:31 pm
BCN
-
ONT
22h 51m
2 stops
$876United Airlines
Sun, Oct 4 - Tue, Oct 13
Delta Logo
11:56 am - 5:10 pm
ONT
-
BCN
20h 14m
2 stops
Delta Logo
1:20 pm - 10:43 pm
BCN
-
ONT
18h 23m
1 stop
$877Delta
Wed, Oct 7 - Wed, Oct 21
United Airlines Logo
6:00 am - 9:35 am
ONT
-
BCN
18h 35m
2 stops
United Airlines Logo
9:55 am - 11:06 pm
BCN
-
ONT
22h 11m
2 stops
$879United Airlines
Wed, Jan 6 - Wed, Jan 20

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Air Canada flights from Ontario to Barcelona-El Prat Airport

Our best Air Canada deals on Ontario to Barcelona-El Prat Airport flight tickets
Air Canada
Oct 18
ONT5:00 amOntario
19h 20m
2 stops
BCN9:20 amBarcelona-El Prat
Oct 22
BCN12:15 pmBarcelona-El Prat
41h 43m
2 stops
ONT8:58 pmOntario
$861
Air Canada
Aug 25
ONT5:00 amOntario
19h 20m
2 stops
BCN9:20 amBarcelona-El Prat
Sep 11
BCN12:15 pmBarcelona-El Prat
41h 38m
2 stops
ONT8:53 pmOntario
$972
Air Canada
Sep 4
ONT7:13 pmOntario
51h 47m
2 stops
BCN8:00 amBarcelona-El Prat
Sep 15
BCN1:15 pmBarcelona-El Prat
31h 57m
2 stops
ONT12:12 pmOntario
$978

Delta flights from Ontario to Barcelona-El Prat Airport

Our best Delta deals on Ontario to Barcelona-El Prat Airport flight tickets
Delta
Oct 6
ONT11:56 amOntario
14h 14m
1 stop
BCN11:10 amBarcelona-El Prat
Oct 14
BCN1:20 pmBarcelona-El Prat
18h 23m
1 stop
ONT10:43 pmOntario
$873
Delta
Oct 7
ONT11:56 amOntario
20h 14m
2 stops
BCN5:10 pmBarcelona-El Prat
Oct 21
BCN1:20 pmBarcelona-El Prat
18h 23m
1 stop
ONT10:43 pmOntario
$877
Delta
Sep 17
ONT6:20 amOntario
19h 50m
1 stop
BCN11:10 amBarcelona-El Prat
Oct 1
BCN11:00 amBarcelona-El Prat
20h 26m
1 stop
ONT10:26 pmOntario
$923

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 July 10, 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

Mon 8/17

10:54 am-10:10 pm

2 stops26h 16m

Barcelona-El Prat

Thu 8/27

8:00 am-9:45 pm

2 stops22h 45m

$830

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 11/8

6:46 am-1:15 pm

1 stop21h 29m

Barcelona-El Prat

Thu 11/12

1:35 pm-6:29 pm

2 stops37h 54m

$853

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 11/8

6:46 am-9:35 am

2 stops17h 49m

Barcelona-El Prat

Thu 11/12

1:35 pm-6:29 pm

2 stops37h 54m

$856

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 10/7

7:00 am-2:25 pm

2 stops22h 25m

Barcelona-El Prat

Wed 10/21

12:15 pm-10:49 pm

2 stops43h 34m

$860

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 10/18

5:00 am-9:20 am

2 stops19h 20m

Barcelona-El Prat

Thu 10/22

12:15 pm-8:58 pm

2 stops41h 43m

$861
Quickest round-trip

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 10/21

10:25 am-10:10 am

1 stop14h 45m

Barcelona-El Prat

Thu 10/29

10:40 am-6:44 pm

1 stop16h 04m

$863

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 10/6

11:56 am-11:10 am

1 stop14h 14m

Barcelona-El Prat

Wed 10/14

1:20 pm-10:43 pm

1 stop18h 23m

$873

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 10/4

1:52 pm-2:20 pm

1 stop15h 28m

Barcelona-El Prat

Tue 10/13

6:40 am-8:31 pm

2 stops22h 51m

$876

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 10/7

11:56 am-5:10 pm

2 stops20h 14m

Barcelona-El Prat

Wed 10/21

1:20 pm-10:43 pm

1 stop18h 23m

$877

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 1/6

6:00 am-9:35 am

2 stops18h 35m

Barcelona-El Prat

Wed 1/20

9:55 am-11:06 pm

2 stops22h 11m

$879

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 cheapest month to fly to Barcelona-El Prat Airport?

The cheapest month to fly to Barcelona-El Prat Airport from Ontario is in January. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Barcelona-El Prat Airport from Ontario during September instead. Flights to Barcelona-El Prat Airport in September, while not as cheap as those in January, still average around $607.

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 $804. 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 Wednesday because tickets tend to average around $933. 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 afternoon is the least expensive time of day to depart. momondo users have found prices as low as $507 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $885 on average. Flights to Barcelona-El Prat Airport from Ontario in the evening 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 10% 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

14h 11m

Direct flights

None
The fastest flight from Ontario to Barcelona-El Prat Airport takes 14h 11m
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

Frequently asked questions about flying from Ontario to Barcelona-El Prat Airport

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

    Barcelona-El Prat is 5972.8 mi away from Ontario. 14h 11m 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 $587Free CancellationRating
7.0
3,251 reviews
Search Iberia flights
United AirlinesPriceFrom $714Free CancellationRating
7.4
9,959 reviews
Search United Airlines flights
British AirwaysPriceFrom $747Free CancellationRating
6.7
8,105 reviews
Search British Airways 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
Tarragona
Tossa de Mar
Castelldefels
El Prat de Llobregat
L'Hospitalet de Llobregat
Cambrils
Calella
Cadaques
Badalona
Roses
Santa Susanna
Pals
Empuriabrava
Calella de Palafrugell
Palafrugell
Pineda de Mar
Malgrat de Mar

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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