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Cheap flights from Rome to Los Angeles from $393

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 10/20. 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.
American Airlines Logo
1:10 pm - 9:29 amFCO  Rome Fiumicino-ONT Ontario
29h 19m2 stops Charlotte Douglas Dallas/Fort Worth
American Airlines Logo
2:22 pm - 10:40 pmONT  Ontario-FCO Rome Fiumicino
23h 18m2 stops Dallas/Fort Worth London Heathrow
$591American Airlines
Thu, Sep 10 - Mon, Sep 14
American Airlines Logo
1:10 pm - 9:29 amFCO  Rome Fiumicino-ONT Ontario
29h 19m2 stops Charlotte Douglas Dallas/Fort Worth
American Airlines Logo
2:22 pm - 8:05 pmONT  Ontario-FCO Rome Fiumicino
20h 43m2 stops Dallas/Fort Worth London Heathrow
$592American Airlines
Thu, Sep 10 - Mon, Sep 14
British Airways Logo
1:10 pm - 10:59 pmFCO  Rome Fiumicino-ONT Ontario
18h 49m1 stop Dallas/Fort Worth
British Airways Logo
6:00 am - 10:40 pmONT  Ontario-FCO Rome Fiumicino
31h 40m2 stops Dallas/Fort Worth London Heathrow
$595British Airways
Thu, Sep 3 - Sun, Sep 20
British Airways Logo
1:10 pm - 10:59 pmFCO  Rome Fiumicino-ONT Ontario
18h 49m1 stop Dallas/Fort Worth
British Airways Logo
2:22 pm - 12:05 pmONT  Ontario-FCO Rome Fiumicino
36h 43m1 stop Dallas/Fort Worth
$599British Airways
Sat, Sep 5 - Sat, Sep 19
Iberia Logo
1:10 pm - 10:59 pmFCO  Rome Fiumicino-ONT Ontario
18h 49m1 stop Dallas/Fort Worth
Iberia Logo
10:29 am - 12:05 pmONT  Ontario-FCO Rome Fiumicino
16h 36m1 stop Dallas/Fort Worth
$600Iberia
Fri, Sep 4 - Mon, Sep 7
American Airlines Logo
1:10 pm - 9:29 amFCO  Rome Fiumicino-ONT Ontario
29h 19m2 stops Charlotte Douglas Dallas/Fort Worth
American Airlines Logo
2:22 pm - 10:40 pmONT  Ontario-FCO Rome Fiumicino
23h 18m2 stops Dallas/Fort Worth London Heathrow
$601American Airlines
Thu, Sep 10 - Mon, Sep 14
British Airways Logo
1:10 pm - 10:59 pmFCO  Rome Fiumicino-ONT Ontario
18h 49m1 stop Dallas/Fort Worth
British Airways Logo
12:37 pm - 12:05 pmONT  Ontario-FCO Rome Fiumicino
14h 28m1 stop Dallas/Fort Worth
$602British Airways
Thu, Sep 3 - Mon, Sep 21
Delta Logo
6:10 am - 5:13 pmFCO  Rome Fiumicino-ONT Ontario
20h 03m2 stops Amsterdam Schiphol Seattle/Tacoma Intl
Delta Logo
6:00 am - 11:20 amONT  Ontario-FCO Rome Fiumicino
20h 20m2 stops Salt Lake City Atlanta Hartsfield-Jackson
$604Delta
Thu, Nov 19 - Sun, Nov 22
British Airways Logo
6:50 am - 6:53 pmFCO  Rome Fiumicino-ONT Ontario
21h 03m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
12:43 pm - 4:55 pmONT  Ontario-FCO Rome Fiumicino
19h 12m2 stops Dallas/Fort Worth London Heathrow
$608British Airways
Thu, Oct 1 - Thu, Oct 15
Delta Logo
12:20 pm - 10:40 pmFCO  Rome Fiumicino-ONT Ontario
19h 20m1 stop Seattle/Tacoma Intl
Delta Logo
11:56 am - 5:30 pmONT  Ontario-FCO Rome Fiumicino
20h 34m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle
$609Delta
Tue, Sep 29 - Thu, Oct 8

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American Airlines flights from Rome to Ontario

Our best American Airlines deals on Rome to Ontario flight tickets
American Airlines
Sep 10
FCO1:10 pmRome Fiumicino
29h 19m
2 stops
ONT9:29 amOntario
Sep 14
ONT2:22 pmOntario
23h 18m
2 stops
FCO10:40 pmRome Fiumicino
$591
American Airlines
Sep 10
FCO1:10 pmRome Fiumicino
29h 19m
2 stops
ONT9:29 amOntario
Sep 14
ONT2:22 pmOntario
20h 43m
2 stops
FCO8:05 pmRome Fiumicino
$592
American Airlines
Sep 10
FCO1:10 pmRome Fiumicino
29h 19m
2 stops
ONT9:29 amOntario
Sep 14
ONT2:22 pmOntario
23h 18m
2 stops
FCO10:40 pmRome Fiumicino
$601

Iberia flights from Rome to Ontario

Our best Iberia deals on Rome to Ontario flight tickets
Iberia
Sep 4
FCO1:10 pmRome Fiumicino
18h 49m
1 stop
ONT10:59 pmOntario
Sep 7
ONT10:29 amOntario
16h 36m
1 stop
FCO12:05 pmRome Fiumicino
$600
Iberia
Sep 5
FCO1:10 pmRome Fiumicino
18h 49m
1 stop
ONT10:59 pmOntario
Sep 21
ONT10:25 amOntario
16h 40m
1 stop
FCO12:05 pmRome Fiumicino
$619
Iberia
Sep 5
FCO7:35 amRome Fiumicino
20h 23m
2 stops
ONT6:58 pmOntario
Sep 19
ONT10:25 amOntario
28h 50m
2 stops
FCO12:15 amRome Fiumicino
$653

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 August 18, 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 Rome Fiumicino - ONT Ontario

FCOONT

Rome Fiumicino

Thu 9/10

1:10 pm-9:29 am

2 stops29h 19m

Ontario

Mon 9/14

2:22 pm-10:40 pm

2 stops23h 18m

$591

RomeOntario

FCO Rome Fiumicino - ONT Ontario

FCOONT

Rome Fiumicino

Thu 9/10

1:10 pm-9:29 am

2 stops29h 19m

Ontario

Mon 9/14

2:22 pm-8:05 pm

2 stops20h 43m

$592

RomeOntario

FCO Rome Fiumicino - ONT Ontario

FCOONT

Rome Fiumicino

Thu 9/3

1:10 pm-10:59 pm

1 stop18h 49m

Ontario

Sun 9/20

6:00 am-10:40 pm

2 stops31h 40m

$595

RomeOntario

FCO Rome Fiumicino - ONT Ontario

FCOONT

Rome Fiumicino

Sat 9/5

1:10 pm-10:59 pm

1 stop18h 49m

Ontario

Sat 9/19

2:22 pm-12:05 pm

1 stop36h 43m

$599

RomeOntario

FCO Rome Fiumicino - ONT Ontario

FCOONT

Rome Fiumicino

Fri 9/4

1:10 pm-10:59 pm

1 stop18h 49m

Ontario

Mon 9/7

10:29 am-12:05 pm

1 stop16h 36m

$600

RomeOntario

FCO Rome Fiumicino - ONT Ontario

FCOONT

Rome Fiumicino

Thu 9/10

1:10 pm-9:29 am

2 stops29h 19m

Ontario

Mon 9/14

2:22 pm-10:40 pm

2 stops23h 18m

$601
Quickest round-trip

RomeOntario

FCO Rome Fiumicino - ONT Ontario

FCOONT

Rome Fiumicino

Thu 9/3

1:10 pm-10:59 pm

1 stop18h 49m

Ontario

Mon 9/21

12:37 pm-12:05 pm

1 stop14h 28m

$602

RomeOntario

FCO Rome Fiumicino - ONT Ontario

FCOONT

Rome Fiumicino

Thu 11/19

6:10 am-5:13 pm

2 stops20h 03m

Ontario

Sun 11/22

6:00 am-11:20 am

2 stops20h 20m

$604

RomeOntario

FCO Rome Fiumicino - ONT Ontario

FCOONT

Rome Fiumicino

Thu 10/1

6:50 am-6:53 pm

2 stops21h 03m

Ontario

Thu 10/15

12:43 pm-4:55 pm

2 stops19h 12m

$608

RomeOntario

FCO Rome Fiumicino - ONT Ontario

FCOONT

Rome Fiumicino

Tue 9/29

12:20 pm-10:40 pm

1 stop19h 20m

Ontario

Thu 10/8

11:56 am-5:30 pm

2 stops20h 34m

$609

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 3% 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

Best Price Found

$393

Fastest flight time

15h 33m

Direct flights

None
The best one-way flight to Ontario from Rome in the past 72 hours is $393. The best round-trip flight deal from Rome to Ontario found on momondo in the last 72 hours is $591.
The fastest flight from Rome to Ontario takes 15h 33m
There are no direct flights from Rome to Ontario. There are no popular flight routes from Rome to Ontario.
Search flight deals

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 33m.

  • 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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