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Cheap flights from Rome Fiumicino Airport to Los Angeles from $498

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 Fiumicino Airport to Los Angeles departing on 8/24. 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

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Find the cheapest flights from Rome Fiumicino Airport to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:10 am - 10:31 pm
FCO
-
ONT
24h 21m
2 stops
United Airlines Logo
5:10 am - 7:55 am
ONT
-
FCO
17h 45m
2 stops
$589United Airlines
Thu, Apr 2 - Mon, Apr 6
United Airlines Logo
7:10 am - 10:31 pm
FCO
-
ONT
24h 21m
2 stops
United Airlines Logo
11:05 am - 1:40 pm
ONT
-
FCO
17h 35m
1 stop
$592United Airlines
Thu, Apr 2 - Mon, Apr 6
United Airlines Logo
6:50 am - 5:47 pm
FCO
-
ONT
19h 57m
2 stops
United Airlines Logo
1:27 pm - 1:40 pm
ONT
-
FCO
15h 13m
1 stop
$595United Airlines
Sat, Apr 4 - Mon, Apr 20
United Airlines Logo
8:00 am - 9:50 pm
FCO
-
ONT
22h 50m
2 stops
United Airlines Logo
6:59 pm - 1:40 pm
ONT
-
FCO
33h 41m
1 stop
$602United Airlines
Tue, Mar 31 - Thu, Apr 30
British Airways Logo
1:10 pm - 10:36 pm
FCO
-
ONT
18h 26m
1 stop
British Airways Logo
10:59 am - 12:05 pm
ONT
-
FCO
16h 06m
1 stop
$603British Airways
Thu, Apr 16 - Fri, Apr 24
American Airlines Logo
10:00 am - 11:31 am
FCO
-
ONT
34h 31m
2 stops
American Airlines Logo
9:53 am - 10:40 pm
ONT
-
FCO
27h 47m
2 stops
$604American Airlines
Thu, Apr 2 - Mon, Apr 6
United Airlines Logo
2:20 pm - 8:36 pm
FCO
-
ONT
15h 16m
1 stop
United Airlines Logo
5:10 am - 12:20 pm
ONT
-
FCO
22h 10m
1 stop
$605United Airlines
Tue, Mar 31 - Sat, Apr 4
United Airlines Logo
8:00 am - 6:02 pm
FCO
-
ONT
19h 02m
2 stops
United Airlines Logo
5:10 am - 12:20 pm
ONT
-
FCO
22h 10m
1 stop
$608United Airlines
Tue, Apr 7 - Fri, Apr 24
British Airways Logo
1:10 pm - 10:14 pm
FCO
-
ONT
18h 04m
1 stop
British Airways Logo
12:47 pm - 5:20 pm
ONT
-
FCO
19h 33m
2 stops
$610British Airways
Fri, Aug 14 - Sat, Aug 22
United Airlines Logo
9:45 am - 10:26 pm
FCO
-
ONT
21h 41m
1 stop
United Airlines Logo
7:00 am - 7:55 am
ONT
-
FCO
15h 55m
1 stop
$611United Airlines
Mon, Mar 30 - Sat, Apr 18

Iberia flights from Rome Fiumicino Airport to Ontario

Our best Iberia deals on Rome Fiumicino Airport to Ontario flight tickets
Iberia
May 6
FCO12:00 pmRome Fiumicino
20h 46m
2 stops
ONT11:46 pmOntario
Jul 7
ONT12:39 pmOntario
14h 26m
1 stop
FCO12:05 pmRome Fiumicino
$686
Iberia
Mar 19
FCO11:35 amRome Fiumicino
20h 24m
1 stop
ONT11:59 pmOntario
Apr 4
ONT7:00 amOntario
20h 05m
1 stop
FCO12:05 pmRome Fiumicino
$925
Iberia
Mar 26
FCO11:35 amRome Fiumicino
20h 24m
1 stop
ONT11:59 pmOntario
Apr 9
ONT10:59 amOntario
16h 06m
1 stop
FCO12:05 pmRome Fiumicino
$1,249

British Airways flights from Rome Fiumicino Airport to Ontario

Our best British Airways deals on Rome Fiumicino Airport to Ontario flight tickets
British Airways
Apr 16
FCO1:10 pmRome Fiumicino
18h 26m
1 stop
ONT10:36 pmOntario
Apr 24
ONT10:59 amOntario
16h 06m
1 stop
FCO12:05 pmRome Fiumicino
$603
British Airways
Aug 14
FCO1:10 pmRome Fiumicino
18h 04m
1 stop
ONT10:14 pmOntario
Aug 22
ONT12:47 pmOntario
19h 33m
2 stops
FCO5:20 pmRome Fiumicino
$610
British Airways
Sep 1
FCO1:30 pmRome Fiumicino
16h 58m
1 stop
ONT9:28 pmOntario
Oct 15
ONT12:48 pmOntario
14h 17m
1 stop
FCO12:05 pmRome Fiumicino
$612

momondo Fare Finder

 
Customize your flight search to find flights from Rome Fiumicino 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 March 15, 2026.
Use the filters below to find and compare flights from Rome Fiumicino Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 4/2

7:10 am-10:31 pm

2 stops24h 21m

Ontario

Mon 4/6

5:10 am-7:55 am

2 stops17h 45m

$589

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 4/2

7:10 am-10:31 pm

2 stops24h 21m

Ontario

Mon 4/6

11:05 am-1:40 pm

1 stop17h 35m

$592

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Sat 4/4

6:50 am-5:47 pm

2 stops19h 57m

Ontario

Mon 4/20

1:27 pm-1:40 pm

1 stop15h 13m

$595

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Tue 3/31

8:00 am-9:50 pm

2 stops22h 50m

Ontario

Thu 4/30

6:59 pm-1:40 pm

1 stop33h 41m

$602
Quickest round-trip

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 4/16

1:10 pm-10:36 pm

1 stop18h 26m

Ontario

Fri 4/24

10:59 am-12:05 pm

1 stop16h 06m

$603

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 4/2

10:00 am-11:31 am

2 stops34h 31m

Ontario

Mon 4/6

9:53 am-10:40 pm

2 stops27h 47m

$604

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Tue 3/31

2:20 pm-8:36 pm

1 stop15h 16m

Ontario

Sat 4/4

5:10 am-12:20 pm

1 stop22h 10m

$605

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Tue 4/7

8:00 am-6:02 pm

2 stops19h 02m

Ontario

Fri 4/24

5:10 am-12:20 pm

1 stop22h 10m

$608

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Fri 8/14

1:10 pm-10:14 pm

1 stop18h 04m

Ontario

Sat 8/22

12:47 pm-5:20 pm

2 stops19h 33m

$610

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Mon 3/30

9:45 am-10:26 pm

1 stop21h 41m

Ontario

Sat 4/18

7:00 am-7:55 am

1 stop15h 55m

$611

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 Rome Fiumicino 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 Rome Fiumicino Airport to Ontario flights?

You could potentially save up to 6% on your flight if you consider stops on a Rome Fiumicino Airport to Ontario flight.

When to book flights from Rome Fiumicino Airport to Ontario

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

Cheap Rome Fiumicino Airport to Ontario (FCO to ONT) flight deals and tips

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

Fastest flight time

15h 16m

Direct flights

None
The fastest flight from Rome Fiumicino Airport to Ontario takes 15h 16m
There are no direct flights from Rome Fiumicino Airport to Ontario. There are no popular flight routes from Rome Fiumicino Airport to Ontario.
Search flight deals

  • How far is Rome Fiumicino to Ontario by plane?

    There are 6304.8 mi between Rome Fiumicino and Ontario. By plane, this route typically takes 15h 16m.

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

    Prices for flights from Rome Fiumicino Airport to Ontario Airport are refreshed on a daily basis.

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

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

    The required travel and health documents for your Ontario 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 Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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?

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

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

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

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

Of course. momondo tracks the price of Rome to Ontario 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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