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Cheap flights from Rome Fiumicino Airport to Los Angeles from $499

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 11/23. 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.
British Airways Logo
1:10 pm - 9:34 am
FCO
-
ONT
29h 24m
1 stop
British Airways Logo
12:59 pm - 11:45 pm
ONT
-
FCO
25h 46m
2 stops
$596British Airways
Thu, Aug 27 - Sun, Aug 30
American Airlines Logo
1:30 pm - 9:34 am
FCO
-
ONT
29h 04m
2 stops
American Airlines Logo
4:07 pm - 10:40 pm
ONT
-
FCO
21h 33m
2 stops
$600American Airlines
Thu, Aug 27 - Sun, Aug 30
American Airlines Logo
1:10 pm - 10:59 pm
FCO
-
ONT
18h 49m
1 stop
American Airlines Logo
4:07 pm - 10:40 pm
ONT
-
FCO
21h 33m
2 stops
$600American Airlines
Thu, Aug 27 - Sun, Aug 30
American Airlines Logo
1:10 pm - 10:59 pm
FCO
-
ONT
18h 49m
1 stop
American Airlines Logo
4:07 pm - 10:40 pm
ONT
-
FCO
21h 33m
2 stops
$601American Airlines
Thu, Aug 27 - Sun, Aug 30
American Airlines Logo
12:15 pm - 9:34 am
FCO
-
ONT
30h 19m
2 stops
American Airlines Logo
4:07 pm - 10:40 pm
ONT
-
FCO
21h 33m
2 stops
$601American Airlines
Thu, Aug 27 - Sun, Aug 30
American Airlines Logo
12:15 pm - 9:34 am
FCO
-
ONT
30h 19m
2 stops
American Airlines Logo
4:07 pm - 10:40 pm
ONT
-
FCO
21h 33m
2 stops
$602American Airlines
Thu, Aug 27 - Sun, Aug 30
American Airlines Logo
1:10 pm - 10:59 pm
FCO
-
ONT
18h 49m
1 stop
American Airlines Logo
4:07 pm - 10:40 pm
ONT
-
FCO
21h 33m
2 stops
$602American Airlines
Thu, Aug 27 - Sun, Aug 30
British Airways Logo
1:10 pm - 10:59 pm
FCO
-
ONT
18h 49m
1 stop
British Airways Logo
2:22 pm - 8:05 pm
ONT
-
FCO
20h 43m
2 stops
$603British Airways
Wed, Aug 26 - Mon, Sep 21
British Airways Logo
1:10 pm - 10:59 pm
FCO
-
ONT
18h 49m
1 stop
British Airways Logo
8:25 am - 10:45 pm
ONT
-
FCO
29h 20m
2 stops
$603British Airways
Thu, Aug 27 - Thu, Sep 24
British Airways Logo
1:10 pm - 10:59 pm
FCO
-
ONT
18h 49m
1 stop
British Airways Logo
7:20 am - 8:05 pm
ONT
-
FCO
27h 45m
2 stops
$603British Airways
Thu, Aug 27 - Mon, Sep 21

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Alaska Airlines flights from Rome Fiumicino Airport to Ontario

Our best Alaska Airlines deals on Rome Fiumicino Airport to Ontario flight tickets
Alaska Airlines
Aug 18
FCO3:15 pmRome Fiumicino
16h 56m
1 stop
ONT11:11 pmOntario
Sep 8
ONT12:12 pmOntario
16h 03m
1 stop
FCO1:15 pmRome Fiumicino
$945
Alaska Airlines
Aug 6
FCO3:15 pmRome Fiumicino
16h 56m
1 stop
ONT11:11 pmOntario
Oct 5
ONT6:02 amOntario
22h 13m
1 stop
FCO1:15 pmRome Fiumicino
$948
Alaska Airlines
Aug 8
FCO3:15 pmRome Fiumicino
16h 56m
1 stop
ONT11:11 pmOntario
Sep 19
ONT6:02 amOntario
22h 13m
1 stop
FCO1:15 pmRome Fiumicino
$950

British Airways flights from Rome Fiumicino Airport to Ontario

Our best British Airways deals on Rome Fiumicino Airport to Ontario flight tickets
British Airways
Aug 27
FCO1:10 pmRome Fiumicino
29h 24m
1 stop
ONT9:34 amOntario
Aug 30
ONT12:59 pmOntario
25h 46m
2 stops
FCO11:45 pmRome Fiumicino
$596
British Airways
Aug 28
FCO1:10 pmRome Fiumicino
18h 49m
1 stop
ONT10:59 pmOntario
Sep 22
ONT10:25 amOntario
28h 20m
2 stops
FCO11:45 pmRome Fiumicino
$603
British Airways
Aug 22
FCO7:15 amRome Fiumicino
35h 19m
2 stops
ONT9:34 amOntario
Sep 22
ONT2:22 pmOntario
24h 23m
2 stops
FCO11:45 pmRome Fiumicino
$616

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 August 4, 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 8/27

1:10 pm-9:34 am

1 stop29h 24m

Ontario

Sun 8/30

12:59 pm-11:45 pm

2 stops25h 46m

$596

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 8/27

1:30 pm-9:34 am

2 stops29h 04m

Ontario

Sun 8/30

4:07 pm-10:40 pm

2 stops21h 33m

$600

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 8/27

1:10 pm-10:59 pm

1 stop18h 49m

Ontario

Sun 8/30

4:07 pm-10:40 pm

2 stops21h 33m

$600

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 8/27

1:10 pm-10:59 pm

1 stop18h 49m

Ontario

Sun 8/30

4:07 pm-10:40 pm

2 stops21h 33m

$601

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 8/27

12:15 pm-9:34 am

2 stops30h 19m

Ontario

Sun 8/30

4:07 pm-10:40 pm

2 stops21h 33m

$601

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 8/27

12:15 pm-9:34 am

2 stops30h 19m

Ontario

Sun 8/30

4:07 pm-10:40 pm

2 stops21h 33m

$602

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 8/27

1:10 pm-10:59 pm

1 stop18h 49m

Ontario

Sun 8/30

4:07 pm-10:40 pm

2 stops21h 33m

$602
Quickest round-trip

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 8/26

1:10 pm-10:59 pm

1 stop18h 49m

Ontario

Mon 9/21

2:22 pm-8:05 pm

2 stops20h 43m

$603

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 8/27

1:10 pm-10:59 pm

1 stop18h 49m

Ontario

Thu 9/24

8:25 am-10:45 pm

2 stops29h 20m

$603

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 8/27

1:10 pm-10:59 pm

1 stop18h 49m

Ontario

Mon 9/21

7:20 am-8:05 pm

2 stops27h 45m

$603

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 19% 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 44m

Direct flights

None
The fastest flight from Rome Fiumicino Airport to Ontario takes 17h 44m
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 44m.

  • 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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