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Cheap flights from Europe to Los Angeles from $383

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Europe to Los Angeles departing on 11/4. 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 Europe to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
9:00 am - 8:15 pmLHR  London Heathrow-ONT Ontario
19h 15m2 stops Zurich San Francisco
United Airlines Logo
6:00 am - 7:40 amONT  Ontario-LHR London Heathrow
17h 40m1 stop Houston George Bush Intcntl
$559United Airlines
Wed, Nov 18 - Thu, Nov 19
United Airlines Logo
9:00 am - 8:15 pmLHR  London Heathrow-ONT Ontario
19h 15m2 stops Zurich San Francisco
United Airlines Logo
6:00 am - 9:20 pmONT  Ontario-LHR London Heathrow
31h 20m2 stops Houston George Bush Intcntl Newark
$559United Airlines
Wed, Nov 18 - Thu, Nov 19
KLM Logo
10:55 am - 4:35 pmLHR  London Heathrow-ONT Ontario
13h 40m1 stop Salt Lake City
KLM Logo
1:04 pm - 10:00 amONT  Ontario-LHR London Heathrow
12h 56m1 stop Salt Lake City
$575KLM
Thu, Sep 10 - Wed, Sep 23
American Airlines Logo
2:20 pm - 9:29 amMXP  Milan Malpensa-ONT Ontario
28h 09m2 stops Philadelphia Dallas/Fort Worth
American Airlines Logo
2:22 pm - 11:35 pmONT  Ontario-MXP Milan Malpensa
24h 13m2 stops Dallas/Fort Worth London Heathrow
$580American Airlines
Thu, Sep 10 - Sun, Sep 13
KLM Logo
9:20 am - 6:07 pmLHR  London Heathrow-ONT Ontario
16h 47m1 stop Atlanta Hartsfield-Jackson
KLM Logo
12:19 pm - 1:15 pmONT  Ontario-LHR London Heathrow
16h 56m1 stop Atlanta Hartsfield-Jackson
$581KLM
Mon, Sep 28 - Mon, Oct 5
American Airlines Logo
2:20 pm - 11:47 amMXP  Milan Malpensa-ONT Ontario
30h 27m2 stops Philadelphia Dallas/Fort Worth
American Airlines Logo
2:22 pm - 11:35 pmONT  Ontario-MXP Milan Malpensa
24h 13m2 stops Dallas/Fort Worth London Heathrow
$581American Airlines
Thu, Sep 10 - Sun, Sep 13
United Airlines Logo
8:40 am - 8:01 pmLHR  London Heathrow-ONT Ontario
19h 21m2 stops Zurich San Francisco
United Airlines Logo
11:10 am - 1:00 pmONT  Ontario-LHR London Heathrow
17h 50m2 stops San Francisco Zurich
$582United Airlines
Mon, Sep 21 - Sun, Sep 27
United Airlines Logo
8:45 am - 8:01 pmLHR  London Heathrow-ONT Ontario
19h 16m2 stops Zurich San Francisco
United Airlines Logo
5:00 am - 5:55 amONT  Ontario-LHR London Heathrow
16h 55m2 stops Denver Intl Newark
$582United Airlines
Thu, Sep 10 - Wed, Sep 23
British Airways Logo
1:10 pm - 10:59 pmFCO  Rome Fiumicino-ONT Ontario
18h 49m1 stop Dallas/Fort Worth
British Airways Logo
8:01 pm - 9:10 amONT  Ontario-FCO Rome Fiumicino
28h 09m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl
$592British Airways
Thu, Sep 3 - Sun, Sep 6
British Airways Logo
1:00 pm - 11:43 pmFCO  Rome Fiumicino-ONT Ontario
19h 43m1 stop Dallas/Fort Worth
British Airways Logo
10:30 am - 10:45 amONT  Ontario-FCO Rome Fiumicino
15h 15m1 stop Dallas/Fort Worth
$599British Airways
Mon, Nov 16 - Mon, Nov 23

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Virgin Atlantic flights from Europe to Ontario

Our best Virgin Atlantic deals on Europe to Ontario flight tickets
Virgin Atlantic
Dec 16
LHR10:45 amLondon Heathrow
13h 45m
1 stop
ONT4:30 pmOntario
Jan 6
ONT1:00 pmOntario
13h 00m
1 stop
LHR10:00 amLondon Heathrow
$584
Virgin Atlantic
Dec 26
LHR10:45 amLondon Heathrow
13h 28m
1 stop
ONT4:13 pmOntario
Jan 2
ONT6:00 amOntario
20h 00m
1 stop
LHR10:00 amLondon Heathrow
$585
Virgin Atlantic
Sep 15
LHR5:45 pmLondon Heathrow
38h 02m
2 stops
ONT11:47 pmOntario
Sep 21
ONT6:00 amOntario
25h 35m
1 stop
LHR3:35 pmLondon Heathrow
$587

British Airways flights from Europe to Ontario

Our best British Airways deals on Europe to Ontario flight tickets
British Airways
Sep 3
FCO1:10 pmRome Fiumicino
18h 49m
1 stop
ONT10:59 pmOntario
Sep 6
ONT8:01 pmOntario
28h 09m
2 stops
FCO9:10 amRome Fiumicino
$592
British Airways
Aug 28
FCO1:10 pmRome Fiumicino
18h 49m
1 stop
ONT10:59 pmOntario
Sep 1
ONT12:59 pmOntario
24h 36m
2 stops
FCO10:35 pmRome Fiumicino
$603
British Airways
Oct 1
FCO6:50 amRome Fiumicino
21h 03m
2 stops
ONT6:53 pmOntario
Oct 15
ONT12:43 pmOntario
19h 12m
2 stops
FCO4:55 pmRome Fiumicino
$608

momondo Fare Finder

 
Customize your flight search to find flights from Europe 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 16, 2026.
Use the filters below to find and compare flights from Europe to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 11/18

9:00 am-8:15 pm

2 stops19h 15m

Ontario

Thu 11/19

6:00 am-7:40 am

1 stop17h 40m

$559

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 11/18

9:00 am-8:15 pm

2 stops19h 15m

Ontario

Thu 11/19

6:00 am-9:20 pm

2 stops31h 20m

$559
Quickest round-trip

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 9/10

10:55 am-4:35 pm

1 stop13h 40m

Ontario

Wed 9/23

1:04 pm-10:00 am

1 stop12h 56m

$575

MilanOntario

MXP Milan Malpensa - ONT Ontario

MXPONT

Milan Malpensa

Thu 9/10

2:20 pm-9:29 am

2 stops28h 09m

Ontario

Sun 9/13

2:22 pm-11:35 pm

2 stops24h 13m

$580

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 9/28

9:20 am-6:07 pm

1 stop16h 47m

Ontario

Mon 10/5

12:19 pm-1:15 pm

1 stop16h 56m

$581

MilanOntario

MXP Milan Malpensa - ONT Ontario

MXPONT

Milan Malpensa

Thu 9/10

2:20 pm-11:47 am

2 stops30h 27m

Ontario

Sun 9/13

2:22 pm-11:35 pm

2 stops24h 13m

$581

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 9/21

8:40 am-8:01 pm

2 stops19h 21m

Ontario

Sun 9/27

11:10 am-1:00 pm

2 stops17h 50m

$582

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 9/10

8:45 am-8:01 pm

2 stops19h 16m

Ontario

Wed 9/23

5:00 am-5:55 am

2 stops16h 55m

$582

RomeOntario

FCO Rome Fiumicino - ONT Ontario

FCOONT

Rome Fiumicino

Thu 9/3

1:10 pm-10:59 pm

1 stop18h 49m

Ontario

Sun 9/6

8:01 pm-9:10 am

2 stops28h 09m

$592

RomeOntario

FCO Rome Fiumicino - ONT Ontario

FCOONT

Rome Fiumicino

Mon 11/16

1:00 pm-11:43 pm

1 stop19h 43m

Ontario

Mon 11/23

10:30 am-10:45 am

1 stop15h 15m

$599

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 Los Angeles from

How to get the cheapest flight ticket from Europe 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

What is the cheapest month to fly to Ontario?

In general, February is the cheapest month to fly from Europe to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $597. If you aren’t able to travel during the month of February, then book flights to Ontario from Europe during January instead. Flights to Ontario in January, while not as cheap as those in February, still average around $613.

Can stopping save me money on Europe to Ontario flights?

You could potentially save up to 25% on your flight if you consider stops on a Europe to Ontario flight.

Cheap Europe to Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Europe to Ontario

Fastest flight time

13h 27m

Direct flights

None
The fastest flight from Europe to Ontario takes 13h 27m
There are no direct flights from Europe to Ontario. There are no popular flight routes from Europe to Ontario.
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Frequently asked questions about flying from Europe to Ontario

  • When did momondo last update prices for flights from Europe to Ontario Airport?

    Prices for flights from Europe to Ontario Airport are updated daily.

  • How many operators does momondo search for flights from Europe to Ontario Airport?

  • How old do you have to be to fly from Europe to Ontario 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 Europe 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.

Best airlines flying from Europe to Ontario

Compare and see reviews for airlines that fly from Europe to Ontario with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $567Free CancellationRating
6.7
8,167 reviews
Search British Airways flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Europe to Ontario for you.

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

momondo does allow users to show only those flights to Ontario from Europe which offer a flexible booking policy as well as other useful filters and features.

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

Once all potential Europe to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario from Europe and alert you when they change.

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