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Cheap flights from Rome Fiumicino Airport to Los Angeles from $371

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 5/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
British Airways Logo
1:10 pm - 10:06 am
FCO
-
ONT
29h 56m
1 stop
British Airways Logo
10:59 am - 12:05 pm
ONT
-
FCO
16h 06m
1 stop
$609British Airways
Wed, Apr 1 - Wed, Apr 8
British Airways Logo
1:10 pm - 6:42 pm
FCO
-
ONT
38h 32m
1 stop
British Airways Logo
2:08 pm - 12:05 pm
ONT
-
FCO
36h 57m
1 stop
$620British Airways
Fri, Apr 3 - Fri, Apr 10
Multiple Airlines Logo
12:20 pm - 11:59 pm
FCO
-
ONT
20h 39m
2 stops
Multiple Airlines Logo
7:00 am - 7:40 pm
ONT
-
FCO
27h 40m
2 stops
$627Multiple Airlines
Fri, Feb 13 - Tue, Feb 17
United Airlines Logo
6:50 am - 10:45 pm
FCO
-
ONT
24h 55m
2 stops
United Airlines Logo
7:00 am - 7:55 am
ONT
-
FCO
15h 55m
1 stop
$633United Airlines
Wed, Apr 1 - Tue, Apr 14
United Airlines Logo
7:05 am - 10:57 pm
FCO
-
ONT
24h 52m
2 stops
United Airlines Logo
6:15 am - 11:00 pm
ONT
-
FCO
32h 45m
2 stops
$637United Airlines
Thu, Feb 12 - Wed, Mar 18
American Airlines Logo
8:20 pm - 1:49 pm
FCO
-
ONT
26h 29m
2 stops
American Airlines Logo
5:02 pm - 9:55 pm
ONT
-
FCO
20h 53m
2 stops
$640American Airlines
Wed, Feb 11 - Tue, Mar 17
United Airlines Logo
12:20 pm - 5:41 pm
FCO
-
ONT
38h 21m
2 stops
United Airlines Logo
1:50 pm - 8:30 am
ONT
-
FCO
33h 40m
3 stops
$646United Airlines
Thu, Feb 12 - Mon, Feb 16
United Airlines Logo
2:20 pm - 8:36 pm
FCO
-
ONT
15h 16m
1 stop
United Airlines Logo
7:00 am - 7:55 am
ONT
-
FCO
15h 55m
1 stop
$650United Airlines
Wed, Apr 1 - Tue, Apr 14
United Airlines Logo
10:30 am - 9:59 pm
FCO
-
ONT
44h 29m
2 stops
United Airlines Logo
1:40 pm - 11:00 pm
ONT
-
FCO
25h 20m
2 stops
$653United Airlines
Wed, Feb 11 - Wed, Mar 18
United Airlines Logo
7:00 am - 10:53 pm
FCO
-
ONT
24h 53m
2 stops
United Airlines Logo
6:00 am - 7:55 am
ONT
-
FCO
17h 55m
2 stops
$681United Airlines
Tue, Feb 10 - Tue, Mar 17

Alaska Airlines flights from Rome Fiumicino Airport to Ontario

Our best Alaska Airlines deals on Rome Fiumicino Airport to Ontario flight tickets
Alaska Airlines
May 1
FCO3:25 pmRome Fiumicino
17h 34m
1 stop
ONT11:59 pmOntario
May 12
ONT6:00 amOntario
22h 15m
1 stop
FCO1:15 pmRome Fiumicino
$987
Alaska Airlines
May 1
FCO3:25 pmRome Fiumicino
27h 20m
1 stop
ONT9:45 amOntario
May 16
ONT4:03 pmOntario
36h 12m
1 stop
FCO1:15 pmRome Fiumicino
$992

United Airlines flights from Rome Fiumicino Airport to Ontario

Our best United Airlines deals on Rome Fiumicino Airport to Ontario flight tickets
United Airlines
Apr 1
FCO6:50 amRome Fiumicino
24h 55m
2 stops
ONT10:45 pmOntario
Apr 14
ONT7:00 amOntario
15h 55m
1 stop
FCO7:55 amRome Fiumicino
$633
United Airlines
Feb 12
FCO7:05 amRome Fiumicino
24h 52m
2 stops
ONT10:57 pmOntario
Mar 18
ONT6:15 amOntario
32h 45m
2 stops
FCO11:00 pmRome Fiumicino
$637
United Airlines
Feb 12
FCO12:20 pmRome Fiumicino
19h 37m
2 stops
ONT10:57 pmOntario
Feb 16
ONT1:50 pmOntario
33h 40m
2 stops
FCO8:30 amRome Fiumicino
$646

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 January 29, 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

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 4/1

1:10 pm-10:06 am

1 stop29h 56m

Ontario

Wed 4/8

10:59 am-12:05 pm

1 stop16h 06m

$609

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Fri 4/3

1:10 pm-6:42 pm

1 stop38h 32m

Ontario

Fri 4/10

2:08 pm-12:05 pm

1 stop36h 57m

$620

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Fri 2/13

12:20 pm-11:59 pm

2 stops20h 39m

Ontario

Tue 2/17

7:00 am-7:40 pm

2 stops27h 40m

$627

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 4/1

6:50 am-10:45 pm

2 stops24h 55m

Ontario

Tue 4/14

7:00 am-7:55 am

1 stop15h 55m

$633

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 2/12

7:05 am-10:57 pm

2 stops24h 52m

Ontario

Wed 3/18

6:15 am-11:00 pm

2 stops32h 45m

$637

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 2/11

8:20 pm-1:49 pm

2 stops26h 29m

Ontario

Tue 3/17

5:02 pm-9:55 pm

2 stops20h 53m

$640

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 2/12

12:20 pm-5:41 pm

2 stops38h 21m

Ontario

Mon 2/16

1:50 pm-8:30 am

3 stops33h 40m

$646

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 4/1

2:20 pm-8:36 pm

1 stop15h 16m

Ontario

Tue 4/14

7:00 am-7:55 am

1 stop15h 55m

$650

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 2/11

10:30 am-9:59 pm

2 stops44h 29m

Ontario

Wed 3/18

1:40 pm-11:00 pm

2 stops25h 20m

$653

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Tue 2/10

7:00 am-10:53 pm

2 stops24h 53m

Ontario

Tue 3/17

6:00 am-7:55 am

2 stops17h 55m

$681

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 10% 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

16h 05m

Direct flights

None
The fastest flight from Rome Fiumicino Airport to Ontario takes 16h 05m
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 16h 05m.

  • 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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