$471 Cheap Flights from Rome (FCO) to Ontario (ONT)

View $471 flight on Sun, Dec 14, 2025Opens in a new window

Popular airlines from Fiumicino - Leonardo da Vinci Intl. Airport (FCO) to Los Angeles - Ontario Intl. Airport (ONT)

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Cheap Flights from Rome to Ontario (FCO-ONT)

Prices were available within the past 7 days and start at $471 for one-way flights and $646 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Mon, Nov 24 - Thu, Dec 4
FCO
Rome
ONT
Ontario
$646 Roundtrip, found 12 hours ago
$646
Roundtrip
found 12 hours ago
Select British Airways flight, departing Mon, Nov 24 from Rome to Ontario, returning Thu, Dec 4, priced at $646 found 12 hours ago
British Airways
Tue, Nov 11 - Tue, Dec 9
FCO
Rome
ONT
Ontario
$656 Roundtrip, found 4 days ago
$656
Roundtrip
found 4 days ago
Select British Airways flight, departing Tue, Nov 11 from Rome to Ontario, returning Tue, Dec 9, priced at $656 found 4 days ago
British Airways
Tue, Nov 11 - Mon, Dec 8
FCO
Rome
ONT
Ontario
$657 Roundtrip, found 3 days ago
$657
Roundtrip
found 3 days ago
Select British Airways flight, departing Tue, Nov 11 from Rome to Ontario, returning Mon, Dec 8, priced at $657 found 3 days ago
Iberia
Mon, Nov 24 - Thu, Dec 4
FCO
Rome
ONT
Ontario
$658 Roundtrip, found 12 hours ago
$658
Roundtrip
found 12 hours ago
Select Iberia flight, departing Mon, Nov 24 from Rome to Ontario, returning Thu, Dec 4, priced at $658 found 12 hours ago
Iberia
Mon, Nov 24 - Thu, Dec 4
FCO
Rome
ONT
Ontario
$664 Roundtrip, found 12 hours ago
$664
Roundtrip
found 12 hours ago
Select Iberia flight, departing Mon, Nov 24 from Rome to Ontario, returning Thu, Dec 4, priced at $664 found 12 hours ago
British Airways
Sat, Nov 22 - Sat, Nov 29
FCO
Rome
ONT
Ontario
$669 Roundtrip, found 6 hours ago
$669
Roundtrip
found 6 hours ago
Select British Airways flight, departing Sat, Nov 22 from Rome to Ontario, returning Sat, Nov 29, priced at $669 found 6 hours ago
Iberia
Thu, Nov 13 - Sun, Nov 16
FCO
Rome
ONT
Ontario
$671 Roundtrip, found 1 day ago
$671
Roundtrip
found 1 day ago
Select Iberia flight, departing Thu, Nov 13 from Rome to Ontario, returning Sun, Nov 16, priced at $671 found 1 day ago
Air Canada
Tue, Dec 16 - Tue, Jan 27
FCO
Rome
ONT
Ontario
$697 Roundtrip, found 6 days ago
$697
Roundtrip
found 6 days ago
Select Air Canada flight, departing Tue, Dec 16 from Rome to Ontario, returning Tue, Jan 27, priced at $697 found 6 days ago
American Airlines
Thu, Nov 20 - Fri, Nov 28
FCO
Rome
ONT
Ontario
$783 Roundtrip, found 3 hours ago
$783
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Thu, Nov 20 from Rome to Ontario, returning Fri, Nov 28, priced at $783 found 3 hours ago
United
Thu, Nov 13 - Tue, Nov 18
FCO
Rome
ONT
Ontario
$799 Roundtrip, found 1 hour ago
$799
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Nov 13 from Rome to Ontario, returning Tue, Nov 18, priced at $799 found 1 hour ago

Find the cheapest month to fly from Rome (FCO) to Ontario (ONT)

April is typically the cheapest month to fly

From $533 - $1,308 per traveler.

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to John Wayne SNA. Cheapest option available. Average driving time to city center is 42 minutes. Flights from $912
SNA
John Wayne
Cheapest
Average driving time to city center42 min
Flights from $912
Flights from Rome (FCO) to Ontario (ONT)
Origin airport
Fiumicino - Leonardo da Vinci Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Air Canada, Air France, American Airlines, British Airways, Delta, Iberia, KLM, United
Roundtrip price
$645
Distance
6306 mi

Rome to Ontario Flights

The cheapest times to fly from Rome to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Rome to Ontario are during the month of November. You can find some of the cheapest flights from Rome to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Rome to Ontario

Sunday is one of the best days to book for cheap flights from Rome to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Rome to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Rome to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $471 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Rome to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Rome to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Fiumicino - Leonardo da Vinci Intl. Airport (FCO) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Snag a cheap one-way flight from $471 or cheap return flight from $646 from Fiumicino - Leonardo da Vinci Intl. Airport (FCO) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Fiumicino - Leonardo da Vinci Intl. Airport (FCO) to Los Angeles - Ontario Intl. Airport (ONT)?
The cheapest month to fly from FCO to ONT is November, when there's less demand. Off-peak months are typically when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Fiumicino - Leonardo da Vinci Intl. Airport (FCO) to Los Angeles - Ontario Intl. Airport (ONT)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest FCO to ONT flight.
How many flights per day from Fiumicino - Leonardo da Vinci Intl. Airport (FCO) to Los Angeles - Ontario Intl. Airport (ONT)?
Direct flights from Fiumicino - Leonardo da Vinci Intl. Airport (FCO) to Los Angeles - Ontario Intl. Airport (ONT) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from FCO to ONT?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change depending on a range of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Fiumicino - Leonardo da Vinci Intl. Airport (FCO) to Los Angeles - Ontario Intl. Airport (ONT)?
To touch down at Los Angeles - Ontario Intl. Airport (ONT) on schedule, book a flight that leaves from Fiumicino - Leonardo da Vinci Intl. Airport (FCO) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Fiumicino - Leonardo da Vinci Intl. Airport (FCO) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Waiting until right before your break to book a ticket from FCO to ONT often results in higher prices. While it's possible to find some last-minute deals, they aren't always guaranteed. Allow some flexibility in your schedule to boost your chances of getting a bargain.
Is it cheaper to book a FCO to ONT flight and hotel package?
Compared with arranging flights and hotels separately, booking a FCO to ONT flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one place will take the hassle out of travel planning. Just pick your flights and choose from our wide range of stays, then customize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Fiumicino - Leonardo da Vinci Intl. Airport (FCO) to Los Angeles - Ontario Intl. Airport (ONT)?
If you booked your FCO to ONT flight in the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

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*Available to One Key members.