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Cheap flights from Ontario to Barcelona from $406

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 9/22. 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.
United Airlines Logo
6:46 am - 1:15 pm
ONT
-
BCN
21h 29m
1 stop
United Airlines Logo
9:55 am - 8:06 pm
BCN
-
ONT
19h 11m
2 stops
$714United Airlines
Wed, Nov 4 - Fri, Nov 20
United Airlines Logo
11:10 am - 2:20 pm
ONT
-
BCN
18h 10m
1 stop
United Airlines Logo
10:30 am - 8:56 pm
BCN
-
ONT
18h 26m
2 stops
$715United Airlines
Tue, Oct 20 - Thu, Oct 29
United Airlines Logo
5:00 am - 9:35 am
ONT
-
BCN
19h 35m
2 stops
United Airlines Logo
9:55 am - 11:06 pm
BCN
-
ONT
22h 11m
2 stops
$717United Airlines
Tue, Nov 24 - Tue, Dec 8
United Airlines Logo
1:56 pm - 8:00 am
ONT
-
BCN
33h 04m
2 stops
United Airlines Logo
12:15 pm - 10:49 pm
BCN
-
ONT
43h 34m
2 stops
$724United Airlines
Sat, Sep 12 - Fri, Sep 25
United Airlines Logo
1:24 pm - 7:45 pm
ONT
-
BCN
21h 21m
2 stops
United Airlines Logo
3:15 pm - 10:49 pm
BCN
-
ONT
16h 34m
1 stop
$729United Airlines
Wed, Sep 30 - Wed, Oct 7
United Airlines Logo
1:24 pm - 7:45 pm
ONT
-
BCN
21h 21m
2 stops
United Airlines Logo
12:15 pm - 12:18 pm
BCN
-
ONT
33h 03m
2 stops
$733United Airlines
Wed, Sep 30 - Wed, Oct 7
United Airlines Logo
1:49 pm - 2:20 pm
ONT
-
BCN
15h 31m
1 stop
United Airlines Logo
3:15 pm - 10:35 pm
BCN
-
ONT
16h 20m
1 stop
$741United Airlines
Mon, Aug 3 - Wed, Aug 26
United Airlines Logo
9:00 am - 9:35 am
ONT
-
BCN
39h 35m
2 stops
United Airlines Logo
1:35 pm - 6:29 pm
BCN
-
ONT
37h 54m
2 stops
$744United Airlines
Sat, Nov 7 - Mon, Nov 16
United Airlines Logo
9:01 am - 1:15 pm
ONT
-
BCN
19h 14m
2 stops
United Airlines Logo
3:15 pm - 10:59 pm
BCN
-
ONT
16h 44m
1 stop
$745United Airlines
Tue, Sep 8 - Tue, Sep 15
United Airlines Logo
6:08 am - 8:20 am
ONT
-
BCN
17h 12m
2 stops
United Airlines Logo
6:40 am - 8:01 pm
BCN
-
ONT
22h 21m
2 stops
$748United Airlines
Tue, Sep 8 - Tue, Sep 15

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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 2
ONT1:50 pmOntario
15h 30m
1 stop
BCN2:20 pmBarcelona-El Prat
Sep 25
BCN3:15 pmBarcelona-El Prat
16h 34m
1 stop
ONT10:49 pmOntario
$711
United Airlines
Nov 4
ONT6:46 amOntario
21h 29m
1 stop
BCN1:15 pmBarcelona-El Prat
Nov 20
BCN9:55 amBarcelona-El Prat
19h 11m
2 stops
ONT8:06 pmOntario
$714
United Airlines
Oct 20
ONT11:10 amOntario
18h 10m
1 stop
BCN2:20 pmBarcelona-El Prat
Oct 29
BCN10:30 amBarcelona-El Prat
18h 26m
2 stops
ONT8:56 pmOntario
$715

Delta flights from Ontario to Barcelona-El Prat Airport

Our best Delta deals on Ontario to Barcelona-El Prat Airport flight tickets
Delta
Sep 29
ONT11:54 amOntario
14h 16m
1 stop
BCN11:10 amBarcelona-El Prat
Oct 16
BCN1:20 pmBarcelona-El Prat
18h 23m
1 stop
ONT10:43 pmOntario
$878
Delta
Oct 6
ONT11:56 amOntario
14h 14m
1 stop
BCN11:10 amBarcelona-El Prat
Oct 27
BCN6:00 amBarcelona-El Prat
24h 43m
2 stops
ONT10:43 pmOntario
$890

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 24, 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

Wed 11/4

6:46 am-1:15 pm

1 stop21h 29m

Barcelona-El Prat

Fri 11/20

9:55 am-8:06 pm

2 stops19h 11m

$714

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 10/20

11:10 am-2:20 pm

1 stop18h 10m

Barcelona-El Prat

Thu 10/29

10:30 am-8:56 pm

2 stops18h 26m

$715

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 11/24

5:00 am-9:35 am

2 stops19h 35m

Barcelona-El Prat

Tue 12/8

9:55 am-11:06 pm

2 stops22h 11m

$717

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 9/12

1:56 pm-8:00 am

2 stops33h 04m

Barcelona-El Prat

Fri 9/25

12:15 pm-10:49 pm

2 stops43h 34m

$724

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 9/30

1:24 pm-7:45 pm

2 stops21h 21m

Barcelona-El Prat

Wed 10/7

3:15 pm-10:49 pm

1 stop16h 34m

$729

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Wed 9/30

1:24 pm-7:45 pm

2 stops21h 21m

Barcelona-El Prat

Wed 10/7

12:15 pm-12:18 pm

2 stops33h 03m

$733
Quickest round-trip

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Mon 8/3

1:49 pm-2:20 pm

1 stop15h 31m

Barcelona-El Prat

Wed 8/26

3:15 pm-10:35 pm

1 stop16h 20m

$741

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Sat 11/7

9:00 am-9:35 am

2 stops39h 35m

Barcelona-El Prat

Mon 11/16

1:35 pm-6:29 pm

2 stops37h 54m

$744

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 9/8

9:01 am-1:15 pm

2 stops19h 14m

Barcelona-El Prat

Tue 9/15

3:15 pm-10:59 pm

1 stop16h 44m

$745

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Tue 9/8

6:08 am-8:20 am

2 stops17h 12m

Barcelona-El Prat

Tue 9/15

6:40 am-8:01 pm

2 stops22h 21m

$748

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 $493 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 $896 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 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 40m

Direct flights

None
The fastest flight from Ontario to Barcelona-El Prat Airport takes 13h 40m
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. 13h 40m 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
3,256 reviews
Search Iberia flights
United AirlinesPriceFrom $714Free CancellationRating
7.4
10,025 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
Tarragona
Tossa de Mar
Castelldefels
El Prat de Llobregat
L'Hospitalet de Llobregat
Calella
Cambrils
Badalona
Cadaques
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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