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Cheap flights from Rome to Los Angeles from $488

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Rome to Los Angeles departing on 9/10. 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 Rome to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
1:00 pm - 11:57 pm
FCO
-
ONT
19h 57m
1 stop
British Airways Logo
10:47 am - 10:45 am
ONT
-
FCO
14h 58m
1 stop
$534British Airways
Wed, Nov 4 - Thu, Nov 12
American Airlines Logo
10:00 am - 8:30 am
FCO
-
ONT
31h 30m
2 stops
American Airlines Logo
10:29 am - 10:40 pm
ONT
-
FCO
27h 11m
2 stops
$566American Airlines
Wed, Oct 7 - Sun, Oct 11
American Airlines Logo
6:45 am - 9:08 pm
FCO
-
ONT
23h 23m
2 stops
American Airlines Logo
1:31 pm - 7:20 pm
ONT
-
FCO
20h 49m
2 stops
$577American Airlines
Wed, Oct 7 - Sun, Oct 11
American Airlines Logo
11:15 am - 9:29 am
FCO
-
ONT
31h 14m
2 stops
American Airlines Logo
2:22 pm - 7:20 pm
ONT
-
FCO
19h 58m
2 stops
$578American Airlines
Wed, Oct 7 - Sun, Oct 11
British Airways Logo
11:10 am - 9:34 am
FCO
-
ONT
55h 24m
2 stops
British Airways Logo
4:07 pm - 9:45 am
ONT
-
FCO
32h 38m
2 stops
$580British Airways
Thu, Aug 20 - Fri, Aug 28
Multiple Airlines Logo
1:30 pm - 10:14 pm
FCO
-
ONT
17h 44m
1 stop
Multiple Airlines Logo
7:00 am - 8:15 am
ONT
-
FCO
16h 15m
1 stop
$586Multiple Airlines
Fri, Nov 13 - Mon, Nov 30
American Airlines Logo
6:45 am - 9:08 pm
FCO
-
ONT
23h 23m
2 stops
American Airlines Logo
7:20 am - 12:05 pm
ONT
-
FCO
19h 45m
1 stop
$587American Airlines
Wed, Oct 7 - Sun, Oct 11
American Airlines Logo
6:45 am - 6:57 pm
FCO
-
ONT
21h 12m
2 stops
American Airlines Logo
7:20 am - 12:05 pm
ONT
-
FCO
19h 45m
1 stop
$588American Airlines
Wed, Oct 7 - Sun, Oct 11
British Airways Logo
1:10 pm - 10:59 pm
FCO
-
ONT
18h 49m
1 stop
British Airways Logo
4:07 pm - 10:40 pm
ONT
-
FCO
21h 33m
2 stops
$590British Airways
Thu, Aug 20 - Sun, Aug 30
Multiple Airlines Logo
10:25 am - 10:14 pm
FCO
-
ONT
19h 49m
1 stop
Multiple Airlines Logo
12:00 pm - 11:20 am
ONT
-
FCO
14h 20m
1 stop
$600Multiple Airlines
Thu, Oct 29 - Wed, Nov 4

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United Airlines flights from Rome to Ontario

Our best United Airlines deals on Rome to Ontario flight tickets
United Airlines
Aug 20
FCO10:00 amRome Fiumicino
43h 01m
2 stops
ONT8:01 pmOntario
Aug 26
ONT7:00 amOntario
15h 55m
1 stop
FCO7:55 amRome Fiumicino
$672
United Airlines
Aug 20
FCO10:00 amRome Fiumicino
43h 01m
2 stops
ONT8:01 pmOntario
Aug 27
ONT9:01 amOntario
20h 04m
2 stops
FCO2:05 pmRome Fiumicino
$677
United Airlines
Oct 16
FCO6:50 amRome Fiumicino
23h 08m
2 stops
ONT8:58 pmOntario
Oct 20
ONT7:00 amOntario
18h 55m
2 stops
FCO10:55 amRome Fiumicino
$678

Iberia flights from Rome to Ontario

Our best Iberia deals on Rome to Ontario flight tickets
Iberia
Jul 8
FCO7:35 amRome Fiumicino
25h 24m
2 stops
ONT11:59 pmOntario
Jul 12
ONT7:00 amOntario
20h 05m
1 stop
FCO12:05 pmRome Fiumicino
$621
Iberia
Jul 2
FCO1:10 pmRome Fiumicino
18h 22m
1 stop
ONT10:32 pmOntario
Jul 13
ONT12:35 pmOntario
14h 30m
1 stop
FCO12:05 pmRome Fiumicino
$622
Iberia
Jun 29
FCO1:10 pmRome Fiumicino
18h 29m
1 stop
ONT10:39 pmOntario
Jul 6
ONT10:25 amOntario
16h 40m
1 stop
FCO12:05 pmRome Fiumicino
$623

momondo Fare Finder

 
Customize your flight search to find flights from Rome 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 June 22, 2026.
Use the filters below to find and compare flights from Rome to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 11/4

1:00 pm-11:57 pm

1 stop19h 57m

Ontario

Thu 11/12

10:47 am-10:45 am

1 stop14h 58m

$534

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 10/7

10:00 am-8:30 am

2 stops31h 30m

Ontario

Sun 10/11

10:29 am-10:40 pm

2 stops27h 11m

$566

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 10/7

6:45 am-9:08 pm

2 stops23h 23m

Ontario

Sun 10/11

1:31 pm-7:20 pm

2 stops20h 49m

$577

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 10/7

11:15 am-9:29 am

2 stops31h 14m

Ontario

Sun 10/11

2:22 pm-7:20 pm

2 stops19h 58m

$578

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 8/20

11:10 am-9:34 am

2 stops55h 24m

Ontario

Fri 8/28

4:07 pm-9:45 am

2 stops32h 38m

$580
Quickest round-trip

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Fri 11/13

1:30 pm-10:14 pm

1 stop17h 44m

Ontario

Mon 11/30

7:00 am-8:15 am

1 stop16h 15m

$586

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 10/7

6:45 am-9:08 pm

2 stops23h 23m

Ontario

Sun 10/11

7:20 am-12:05 pm

1 stop19h 45m

$587

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 10/7

6:45 am-6:57 pm

2 stops21h 12m

Ontario

Sun 10/11

7:20 am-12:05 pm

1 stop19h 45m

$588

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 8/20

1:10 pm-10:59 pm

1 stop18h 49m

Ontario

Sun 8/30

4:07 pm-10:40 pm

2 stops21h 33m

$590

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 10/29

10:25 am-10:14 pm

1 stop19h 49m

Ontario

Wed 11/4

12:00 pm-11:20 am

1 stop14h 20m

$600

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 Rome 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 Rome to Ontario flights?

You could potentially save up to 42% on your flight if you consider stops on a Rome to Ontario flight.

When to book flights from Rome to Ontario

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

Cheap Rome to Ontario (ROM to ONT) flight deals and tips

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

Fastest flight time

15h 22m

Direct flights

None
The fastest flight from Rome to Ontario takes 15h 22m
There are no direct flights from Rome to Ontario. There are no popular flight routes from Rome to Ontario.
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Frequently asked questions about flying from Rome to Ontario

  • How far is Rome to Ontario by plane?

    A flight from Rome to Ontario will travel around 6306.5 mi. A reasonable flight in good conditions will take 15h 22m.

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

    Prices for flights from Rome to Ontario Airport refresh daily.

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

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

    The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

It is quick and easy to find Rome to Ontario 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 Ontario that suits you.

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

Flights from Rome to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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 Rome to Ontario.

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

If you are not ready to book a flight from Rome to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.

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