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Cheap flights from Rome Fiumicino Airport to Los Angeles from $537

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 8/26. 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 Fiumicino Airport to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
11:05 am - 9:29 am
FCO
-
ONT
31h 24m
2 stops
American Airlines Logo
2:22 pm - 8:05 pm
ONT
-
FCO
20h 43m
2 stops
$570American Airlines
Fri, Oct 16 - Tue, Oct 20
American Airlines Logo
11:05 am - 11:27 am
FCO
-
ONT
33h 22m
2 stops
American Airlines Logo
6:00 am - 11:25 am
ONT
-
FCO
20h 25m
2 stops
$571American Airlines
Fri, Oct 16 - Tue, Oct 20
KLM Logo
1:10 pm - 10:14 pm
FCO
-
ONT
18h 04m
1 stop
KLM Logo
7:00 am - 7:35 am
ONT
-
FCO
15h 35m
1 stop
$592KLM
Thu, Oct 8 - Wed, Oct 21
KLM Logo
9:45 am - 6:18 pm
FCO
-
ONT
17h 33m
1 stop
KLM Logo
7:00 am - 7:35 am
ONT
-
FCO
15h 35m
1 stop
$598KLM
Wed, Oct 14 - Wed, Oct 21
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
KLM Logo
9:45 am - 6:04 pm
FCO
-
ONT
17h 19m
1 stop
KLM Logo
7:00 am - 7:35 am
ONT
-
FCO
15h 35m
1 stop
$602KLM
Thu, Oct 1 - Sat, Oct 17
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
$612Multiple Airlines
Thu, Oct 29 - Thu, Nov 5
KLM Logo
12:20 pm - 10:43 pm
FCO
-
ONT
19h 23m
1 stop
KLM Logo
5:05 pm - 6:45 pm
ONT
-
FCO
16h 40m
2 stops
$620KLM
Thu, Oct 8 - Wed, Oct 21
KLM Logo
12:20 pm - 10:45 pm
FCO
-
ONT
19h 25m
1 stop
KLM Logo
7:00 am - 10:10 am
ONT
-
FCO
18h 10m
1 stop
$623KLM
Thu, Sep 3 - Sun, Sep 13
British Airways Logo
1:30 pm - 10:34 pm
FCO
-
ONT
18h 04m
1 stop
British Airways Logo
12:35 pm - 12:05 pm
ONT
-
FCO
14h 30m
1 stop
$626British Airways
Tue, Jul 14 - Mon, Jul 20

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KLM flights from Rome Fiumicino Airport to Ontario

Our best KLM deals on Rome Fiumicino Airport to Ontario flight tickets
KLM
Oct 8
FCO1:10 pmRome Fiumicino
18h 04m
1 stop
ONT10:14 pmOntario
Oct 21
ONT7:00 amOntario
15h 35m
1 stop
FCO7:35 amRome Fiumicino
$592
KLM
Oct 14
FCO9:45 amRome Fiumicino
17h 33m
1 stop
ONT6:18 pmOntario
Oct 21
ONT7:00 amOntario
15h 35m
1 stop
FCO7:35 amRome Fiumicino
$598
KLM
Oct 1
FCO9:45 amRome Fiumicino
17h 19m
1 stop
ONT6:04 pmOntario
Oct 17
ONT7:00 amOntario
15h 35m
1 stop
FCO7:35 amRome Fiumicino
$602

British Airways flights from Rome Fiumicino Airport to Ontario

Our best British Airways deals on Rome Fiumicino Airport to Ontario flight tickets
British Airways
Jun 25
FCO1:30 pmRome Fiumicino
18h 06m
1 stop
ONT10:36 pmOntario
Sep 20
ONT2:22 pmOntario
23h 18m
2 stops
FCO10:40 pmRome Fiumicino
$595
British Airways
Jun 25
FCO1:30 pmRome Fiumicino
18h 06m
1 stop
ONT10:36 pmOntario
Aug 31
ONT2:27 pmOntario
20h 38m
2 stops
FCO8:05 pmRome Fiumicino
$596
British Airways
Jun 25
FCO1:30 pmRome Fiumicino
18h 06m
1 stop
ONT10:36 pmOntario
Sep 15
ONT12:37 pmOntario
24h 58m
2 stops
FCO10:35 pmRome Fiumicino
$597

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 June 18, 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

Fri 10/16

11:05 am-9:29 am

2 stops31h 24m

Ontario

Tue 10/20

2:22 pm-8:05 pm

2 stops20h 43m

$570

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Fri 10/16

11:05 am-11:27 am

2 stops33h 22m

Ontario

Tue 10/20

6:00 am-11:25 am

2 stops20h 25m

$571

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 10/8

1:10 pm-10:14 pm

1 stop18h 04m

Ontario

Wed 10/21

7:00 am-7:35 am

1 stop15h 35m

$592

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 10/14

9:45 am-6:18 pm

1 stop17h 33m

Ontario

Wed 10/21

7:00 am-7:35 am

1 stop15h 35m

$598

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

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 10/1

9:45 am-6:04 pm

1 stop17h 19m

Ontario

Sat 10/17

7:00 am-7:35 am

1 stop15h 35m

$602

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 10/29

10:25 am-10:14 pm

1 stop19h 49m

Ontario

Thu 11/5

12:00 pm-11:20 am

1 stop14h 20m

$612

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 10/8

12:20 pm-10:43 pm

1 stop19h 23m

Ontario

Wed 10/21

5:05 pm-6:45 pm

2 stops16h 40m

$620

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 9/3

12:20 pm-10:45 pm

1 stop19h 25m

Ontario

Sun 9/13

7:00 am-10:10 am

1 stop18h 10m

$623
Quickest round-trip

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Tue 7/14

1:30 pm-10:34 pm

1 stop18h 04m

Ontario

Mon 7/20

12:35 pm-12:05 pm

1 stop14h 30m

$626

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 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

15h 22m

Direct flights

None
The fastest flight from Rome Fiumicino Airport to Ontario takes 15h 22m
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

Frequently asked questions about flying from Rome Fiumicino Airport to Ontario

  • 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 22m.

  • 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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