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Cheap flights from Barcelona-El Prat Airport to Los Angeles from $399

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Barcelona-El Prat Airport to Los Angeles departing on 9/18. 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

Find the cheapest flights from Barcelona-El Prat Airport to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:50 am - 6:44 pm
BCN
-
ONT
20h 54m
2 stops
United Airlines Logo
6:00 am - 8:20 am
ONT
-
BCN
17h 20m
2 stops
$813United Airlines
Thu, Jan 21 - Sun, Jan 31
United Airlines Logo
6:50 am - 5:47 pm
BCN
-
ONT
19h 57m
2 stops
United Airlines Logo
6:00 am - 8:20 am
ONT
-
BCN
17h 20m
2 stops
$813United Airlines
Tue, Jan 12 - Thu, Jan 21
United Airlines Logo
6:50 am - 8:20 pm
BCN
-
ONT
22h 30m
2 stops
United Airlines Logo
5:00 am - 9:35 am
ONT
-
BCN
19h 35m
2 stops
$817United Airlines
Tue, Jan 12 - Wed, Jan 27
United Airlines Logo
11:00 am - 11:06 pm
BCN
-
ONT
21h 06m
2 stops
United Airlines Logo
6:00 am - 8:20 am
ONT
-
BCN
17h 20m
2 stops
$824United Airlines
Thu, Jan 14 - Thu, Jan 28
United Airlines Logo
11:00 am - 9:21 pm
BCN
-
ONT
19h 21m
2 stops
United Airlines Logo
6:00 am - 8:20 am
ONT
-
BCN
17h 20m
2 stops
$825United Airlines
Sun, Jan 17 - Sat, Jan 30
United Airlines Logo
11:00 am - 9:21 pm
BCN
-
ONT
19h 21m
2 stops
United Airlines Logo
6:00 am - 8:20 am
ONT
-
BCN
17h 20m
2 stops
$825United Airlines
Sun, Jan 17 - Sun, Jan 31
United Airlines Logo
1:50 pm - 11:06 pm
BCN
-
ONT
18h 16m
2 stops
United Airlines Logo
5:00 am - 8:20 am
ONT
-
BCN
18h 20m
2 stops
$826United Airlines
Fri, Jan 15 - Sat, Feb 6
Multiple Airlines Logo
8:00 am - 8:55 pm
BCN
-
ONT
21h 55m
2 stops
Multiple Airlines Logo
2:10 pm - 10:10 pm
ONT
-
BCN
23h 00m
2 stops
$856Multiple Airlines
Tue, Aug 25 - Tue, Sep 1
British Airways Logo
10:45 am - 9:29 am
BCN
-
ONT
31h 44m
1 stop
British Airways Logo
12:37 pm - 10:10 am
ONT
-
BCN
36h 33m
1 stop
$867British Airways
Wed, Sep 16 - Sun, Sep 20
KLM Logo
1:15 pm - 10:14 pm
BCN
-
ONT
17h 59m
1 stop
KLM Logo
12:00 pm - 11:20 am
ONT
-
BCN
14h 20m
1 stop
$867KLM
Sun, Jan 17 - Sun, Jan 31

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KLM flights from Barcelona-El Prat Airport to Ontario

Our best KLM deals on Barcelona-El Prat Airport to Ontario flight tickets
KLM
Jan 17
BCN1:15 pmBarcelona-El Prat
17h 59m
1 stop
ONT10:14 pmOntario
Jan 31
ONT12:00 pmOntario
14h 20m
1 stop
BCN11:20 amBarcelona-El Prat
$867
KLM
Aug 27
BCN11:00 amBarcelona-El Prat
16h 30m
1 stop
ONT6:30 pmOntario
Sep 24
ONT11:54 amOntario
14h 16m
1 stop
BCN11:10 amBarcelona-El Prat
$896
KLM
Sep 4
BCN11:30 amBarcelona-El Prat
16h 00m
1 stop
ONT6:30 pmOntario
Sep 24
ONT11:54 amOntario
14h 16m
1 stop
BCN11:10 amBarcelona-El Prat
$902

Iberia flights from Barcelona-El Prat Airport to Ontario

Our best Iberia deals on Barcelona-El Prat Airport to Ontario flight tickets
Iberia
Oct 22
BCN1:30 pmBarcelona-El Prat
16h 41m
1 stop
ONT9:11 pmOntario
Oct 29
ONT6:00 amOntario
17h 35m
1 stop
BCN7:35 amBarcelona-El Prat
$918
Iberia
Sep 24
BCN10:45 amBarcelona-El Prat
19h 24m
1 stop
ONT9:09 pmOntario
Oct 3
ONT10:25 amOntario
14h 45m
1 stop
BCN10:10 amBarcelona-El Prat
$924
Iberia
Sep 10
BCN10:45 amBarcelona-El Prat
19h 24m
1 stop
ONT9:09 pmOntario
Oct 22
ONT10:25 amOntario
14h 45m
1 stop
BCN10:10 amBarcelona-El Prat
$934

momondo Fare Finder

 
Customize your flight search to find flights from Barcelona-El Prat Airport to Ontario 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 August 2, 2026.
Use the filters below to find and compare flights from Barcelona-El Prat Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 1/21

6:50 am-6:44 pm

2 stops20h 54m

Ontario

Sun 1/31

6:00 am-8:20 am

2 stops17h 20m

$813

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Tue 1/12

6:50 am-5:47 pm

2 stops19h 57m

Ontario

Thu 1/21

6:00 am-8:20 am

2 stops17h 20m

$813

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Tue 1/12

6:50 am-8:20 pm

2 stops22h 30m

Ontario

Wed 1/27

5:00 am-9:35 am

2 stops19h 35m

$817

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Thu 1/14

11:00 am-11:06 pm

2 stops21h 06m

Ontario

Thu 1/28

6:00 am-8:20 am

2 stops17h 20m

$824

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Sun 1/17

11:00 am-9:21 pm

2 stops19h 21m

Ontario

Sat 1/30

6:00 am-8:20 am

2 stops17h 20m

$825

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Sun 1/17

11:00 am-9:21 pm

2 stops19h 21m

Ontario

Sun 1/31

6:00 am-8:20 am

2 stops17h 20m

$825

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Fri 1/15

1:50 pm-11:06 pm

2 stops18h 16m

Ontario

Sat 2/6

5:00 am-8:20 am

2 stops18h 20m

$826

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Tue 8/25

8:00 am-8:55 pm

2 stops21h 55m

Ontario

Tue 9/1

2:10 pm-10:10 pm

2 stops23h 00m

$856

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Wed 9/16

10:45 am-9:29 am

1 stop31h 44m

Ontario

Sun 9/20

12:37 pm-10:10 am

1 stop36h 33m

$867
Quickest round-trip

BarcelonaOntario

BCN - ONT

BCNONT

Barcelona-El Prat

Sun 1/17

1:15 pm-10:14 pm

1 stop17h 59m

Ontario

Sun 1/31

12:00 pm-11:20 am

1 stop14h 20m

$867

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Los Angeles from

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

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

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

You could potentially save up to 42% on your flight if you consider stops on a Barcelona-El Prat Airport to Ontario flight.

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

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

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

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

Fastest flight time

16h 36m

Direct flights

None
The fastest flight from Barcelona-El Prat Airport to Ontario takes 16h 36m
There are no direct flights from Barcelona-El Prat Airport to Ontario. There are no popular flight routes from Barcelona-El Prat Airport to Ontario.
Search flight deals

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

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

    The distance between Barcelona-El Prat and Ontario is about 5972.8 mi. Flights usually cover this in 16h 36m, depending on flying conditions and air traffic around both airports.

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Barcelona-El Prat Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Barcelona to Ontario. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to Ontario from Barcelona with this policy.

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

momondo provides multiple filters to help you find the best flight to Ontario from Barcelona. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Ontario from Barcelona are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Tue 9/1
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