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Cheap flights from Rome Fiumicino Airport to Los Angeles from $487

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 5/27. 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
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.
Multiple Airlines Logo
12:00 pm - 11:06 pm
FCO
-
ONT
20h 06m
2 stops
Multiple Airlines Logo
7:20 am - 11:25 am
ONT
-
FCO
19h 05m
2 stops
$549Multiple Airlines
Thu, Sep 10 - Tue, Sep 29
Iberia Logo
1:10 pm - 9:12 pm
FCO
-
ONT
17h 02m
1 stop
Iberia Logo
7:20 am - 12:05 pm
ONT
-
FCO
19h 45m
1 stop
$550Iberia
Thu, Sep 3 - Tue, Sep 29
British Airways Logo
1:10 pm - 10:58 pm
FCO
-
ONT
18h 48m
1 stop
British Airways Logo
1:31 pm - 4:25 pm
ONT
-
FCO
17h 54m
2 stops
$551British Airways
Thu, Sep 3 - Tue, Sep 29
Iberia Logo
1:30 pm - 11:06 pm
FCO
-
ONT
18h 36m
1 stop
Iberia Logo
10:47 am - 10:45 am
ONT
-
FCO
14h 58m
1 stop
$552Iberia
Wed, Sep 16 - Sat, Nov 14
American Airlines Logo
6:45 am - 5:47 pm
FCO
-
ONT
20h 02m
2 stops
American Airlines Logo
10:25 am - 12:05 pm
ONT
-
FCO
16h 40m
1 stop
$562American Airlines
Wed, Oct 7 - Sun, Oct 11
British Airways Logo
1:10 pm - 9:12 pm
FCO
-
ONT
17h 02m
1 stop
British Airways Logo
11:59 pm - 12:05 pm
ONT
-
FCO
27h 06m
1 stop
$568British Airways
Wed, Aug 12 - Thu, Aug 27
British Airways Logo
1:10 pm - 11:59 pm
FCO
-
ONT
19h 49m
1 stop
British Airways Logo
5:34 am - 12:05 pm
ONT
-
FCO
21h 31m
1 stop
$589British Airways
Thu, Jul 9 - Tue, Jul 21
American Airlines Logo
10:00 am - 11:27 am
FCO
-
ONT
34h 27m
2 stops
American Airlines Logo
1:31 pm - 3:50 pm
ONT
-
FCO
17h 19m
2 stops
$624American Airlines
Wed, Oct 7 - Sun, Oct 11
United Airlines Logo
6:50 am - 5:52 pm
FCO
-
ONT
20h 02m
2 stops
United Airlines Logo
6:39 pm - 1:40 pm
ONT
-
FCO
34h 01m
1 stop
$638United Airlines
Sat, May 16 - Sat, May 23
United Airlines Logo
6:50 am - 10:59 pm
FCO
-
ONT
25h 09m
2 stops
United Airlines Logo
6:30 pm - 12:20 pm
ONT
-
FCO
32h 50m
1 stop
$639United Airlines
Fri, May 15 - Mon, May 25

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American Airlines flights from Rome Fiumicino Airport to Ontario

Our best American Airlines deals on Rome Fiumicino Airport to Ontario flight tickets
American Airlines
Oct 7
FCO6:45 amRome Fiumicino
20h 02m
2 stops
ONT5:47 pmOntario
Oct 11
ONT10:25 amOntario
16h 40m
1 stop
FCO12:05 pmRome Fiumicino
$562
American Airlines
Oct 7
FCO10:00 amRome Fiumicino
34h 27m
2 stops
ONT11:27 amOntario
Oct 11
ONT1:31 pmOntario
17h 19m
2 stops
FCO3:50 pmRome Fiumicino
$624
American Airlines
Oct 7
FCO10:00 amRome Fiumicino
34h 27m
2 stops
ONT11:27 amOntario
Oct 11
ONT1:31 pmOntario
20h 49m
2 stops
FCO7:20 pmRome Fiumicino
$642

Iberia flights from Rome Fiumicino Airport to Ontario

Our best Iberia deals on Rome Fiumicino Airport to Ontario flight tickets
Iberia
Sep 3
FCO1:10 pmRome Fiumicino
17h 02m
1 stop
ONT9:12 pmOntario
Sep 29
ONT7:20 amOntario
19h 45m
1 stop
FCO12:05 pmRome Fiumicino
$550
Iberia
Sep 16
FCO1:30 pmRome Fiumicino
18h 36m
1 stop
ONT11:06 pmOntario
Nov 14
ONT10:47 amOntario
14h 58m
1 stop
FCO10:45 amRome Fiumicino
$552
Iberia
Sep 16
FCO12:00 pmRome Fiumicino
20h 06m
2 stops
ONT11:06 pmOntario
Oct 3
ONT2:22 pmOntario
18h 53m
2 stops
FCO6:15 pmRome Fiumicino
$669

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 May 2, 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 9/10

12:00 pm-11:06 pm

2 stops20h 06m

Ontario

Tue 9/29

7:20 am-11:25 am

2 stops19h 05m

$549

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 9/3

1:10 pm-9:12 pm

1 stop17h 02m

Ontario

Tue 9/29

7:20 am-12:05 pm

1 stop19h 45m

$550

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 9/3

1:10 pm-10:58 pm

1 stop18h 48m

Ontario

Tue 9/29

1:31 pm-4:25 pm

2 stops17h 54m

$551
Quickest round-trip

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 9/16

1:30 pm-11:06 pm

1 stop18h 36m

Ontario

Sat 11/14

10:47 am-10:45 am

1 stop14h 58m

$552

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 10/7

6:45 am-5:47 pm

2 stops20h 02m

Ontario

Sun 10/11

10:25 am-12:05 pm

1 stop16h 40m

$562

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 8/12

1:10 pm-9:12 pm

1 stop17h 02m

Ontario

Thu 8/27

11:59 pm-12:05 pm

1 stop27h 06m

$568

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 7/9

1:10 pm-11:59 pm

1 stop19h 49m

Ontario

Tue 7/21

5:34 am-12:05 pm

1 stop21h 31m

$589

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 10/7

10:00 am-11:27 am

2 stops34h 27m

Ontario

Sun 10/11

1:31 pm-3:50 pm

2 stops17h 19m

$624

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Sat 5/16

6:50 am-5:52 pm

2 stops20h 02m

Ontario

Sat 5/23

6:39 pm-1:40 pm

1 stop34h 01m

$638

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Fri 5/15

6:50 am-10:59 pm

2 stops25h 09m

Ontario

Mon 5/25

6:30 pm-12:20 pm

1 stop32h 50m

$639

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 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

17h 02m

Direct flights

None
The fastest flight from Rome Fiumicino Airport to Ontario takes 17h 02m
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 17h 02m.

  • 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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