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Cheap flights from Ontario to Barcelona from $380

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 8/5. 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.
KLM Logo
7:05 am - 12:50 pm
ONT
-
BCN
20h 45m
1 stop
KLM Logo
1:20 pm - 10:43 pm
BCN
-
ONT
18h 23m
1 stop
$873KLM
Sun, Oct 4 - Fri, Oct 9
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
$874Multiple Airlines
Sun, Aug 16 - Wed, Aug 26
Delta Logo
6:00 am - 2:50 pm
ONT
-
BCN
23h 50m
2 stops
Delta Logo
11:00 am - 10:14 pm
BCN
-
ONT
20h 14m
1 stop
$877Delta
Sun, Oct 4 - Fri, Oct 9
American Airlines Logo
10:25 am - 12:00 pm
ONT
-
BCN
16h 35m
2 stops
American Airlines Logo
10:45 am - 9:08 pm
BCN
-
ONT
19h 23m
2 stops
$878American Airlines
Wed, Sep 30 - Thu, Oct 8
American Airlines Logo
8:25 am - 10:10 am
ONT
-
BCN
16h 45m
1 stop
American Airlines Logo
12:30 pm - 11:06 pm
BCN
-
ONT
19h 36m
2 stops
$884American Airlines
Sun, Oct 4 - Fri, Oct 9
Multiple Airlines Logo
10:54 am - 10:10 pm
ONT
-
BCN
26h 16m
2 stops
Multiple Airlines Logo
8:00 am - 8:55 pm
BCN
-
ONT
21h 55m
2 stops
$886Multiple Airlines
Mon, Jul 27 - Tue, Aug 11
British Airways Logo
4:47 pm - 6:25 pm
ONT
-
BCN
16h 38m
2 stops
British Airways Logo
6:40 am - 10:23 pm
BCN
-
ONT
24h 43m
2 stops
$887British Airways
Wed, Nov 18 - Thu, Nov 26
American Airlines Logo
6:15 am - 10:35 am
ONT
-
BCN
19h 20m
2 stops
American Airlines Logo
12:30 pm - 11:06 pm
BCN
-
ONT
19h 36m
2 stops
$888American Airlines
Sun, Oct 4 - Fri, Oct 9
Multiple Airlines Logo
10:54 am - 10:10 pm
ONT
-
BCN
26h 16m
2 stops
Multiple Airlines Logo
8:00 am - 8:24 pm
BCN
-
ONT
21h 24m
2 stops
$890Multiple Airlines
Mon, Aug 10 - Thu, Sep 3
Iberia Logo
10:25 am - 10:10 am
ONT
-
BCN
14h 45m
1 stop
Iberia Logo
1:30 pm - 11:06 pm
BCN
-
ONT
18h 36m
1 stop
$893Iberia
Wed, Sep 30 - Thu, Oct 8

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KLM flights from Ontario to Barcelona-El Prat Airport

Our best KLM deals on Ontario to Barcelona-El Prat Airport flight tickets
KLM
Oct 4
ONT7:05 amOntario
20h 45m
1 stop
BCN12:50 pmBarcelona-El Prat
Oct 9
BCN1:20 pmBarcelona-El Prat
18h 23m
1 stop
ONT10:43 pmOntario
$873
KLM
Oct 8
ONT7:00 amOntario
19h 10m
1 stop
BCN11:10 amBarcelona-El Prat
Oct 21
BCN11:00 amBarcelona-El Prat
20h 14m
1 stop
ONT10:14 pmOntario
$923
KLM
Aug 10
ONT12:00 pmOntario
15h 50m
1 stop
BCN12:50 pmBarcelona-El Prat
Sep 3
BCN11:00 amBarcelona-El Prat
16h 29m
1 stop
ONT6:29 pmOntario
$966

Delta flights from Ontario to Barcelona-El Prat Airport

Our best Delta deals on Ontario to Barcelona-El Prat Airport flight tickets
Delta
Oct 4
ONT6:00 amOntario
23h 50m
2 stops
BCN2:50 pmBarcelona-El Prat
Oct 9
BCN11:00 amBarcelona-El Prat
20h 14m
1 stop
ONT10:14 pmOntario
$877
Delta
Oct 7
ONT12:00 pmOntario
18h 35m
2 stops
BCN3:35 pmBarcelona-El Prat
Oct 18
BCN1:20 pmBarcelona-El Prat
30h 56m
1 stop
ONT11:16 amOntario
$933
Delta
Sep 25
ONT10:00 pmOntario
29h 50m
1 stop
BCN12:50 pmBarcelona-El Prat
Oct 4
BCN11:00 amBarcelona-El Prat
20h 26m
1 stop
ONT10:26 pmOntario
$978

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 June 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

Sun 10/4

7:05 am-12:50 pm

1 stop20h 45m

Barcelona-El Prat

Fri 10/9

1:20 pm-10:43 pm

1 stop18h 23m

$873

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 8/16

10:29 am-10:10 am

1 stop14h 41m

Barcelona-El Prat

Wed 8/26

1:50 pm-9:45 pm

2 stops40h 55m

$874

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 10/4

6:00 am-2:50 pm

2 stops23h 50m

Barcelona-El Prat

Fri 10/9

11:00 am-10:14 pm

1 stop20h 14m

$877

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 9/30

10:25 am-12:00 pm

2 stops16h 35m

Barcelona-El Prat

Thu 10/8

10:45 am-9:08 pm

2 stops19h 23m

$878

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 10/4

8:25 am-10:10 am

1 stop16h 45m

Barcelona-El Prat

Fri 10/9

12:30 pm-11:06 pm

2 stops19h 36m

$884

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 7/27

10:54 am-10:10 pm

2 stops26h 16m

Barcelona-El Prat

Tue 8/11

8:00 am-8:55 pm

2 stops21h 55m

$886

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 11/18

4:47 pm-6:25 pm

2 stops16h 38m

Barcelona-El Prat

Thu 11/26

6:40 am-10:23 pm

2 stops24h 43m

$887

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sun 10/4

6:15 am-10:35 am

2 stops19h 20m

Barcelona-El Prat

Fri 10/9

12:30 pm-11:06 pm

2 stops19h 36m

$888

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 8/10

10:54 am-10:10 pm

2 stops26h 16m

Barcelona-El Prat

Thu 9/3

8:00 am-8:24 pm

2 stops21h 24m

$890
Quickest round-trip

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 9/30

10:25 am-10:10 am

1 stop14h 45m

Barcelona-El Prat

Thu 10/8

1:30 pm-11:06 pm

1 stop18h 36m

$893

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

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 $682.

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 $755. 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 $900. 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 $858 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 28% 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 41m

Direct flights

None
The fastest flight from Ontario to Barcelona-El Prat Airport takes 14h 41m
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 41m 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
3,232 reviews
Search Iberia flights
United AirlinesPriceFrom $714Free CancellationRating
7.4
9,804 reviews
Search United Airlines flights
British AirwaysPriceFrom $747Free CancellationRating
6.7
8,035 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
Salou
Sitges
Tossa de Mar
Castelldefels
Tarragona
El Prat de Llobregat
L'Hospitalet de Llobregat
Calella
Cambrils
Cadaques
Badalona
Santa Susanna
Empuriabrava
Pineda de Mar
Calella de Palafrugell
Pals
Palafrugell
Roses
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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