FCO - ONT

$396 Find Cheap Flights from Rome to Ontario - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$612
Typical prices: $590-$796
United Airlines
Sat 1/13Thu 2/1
FCO - ONT • 2 stops
Cheapest one-way
$396
Typical prices: $563-$731
British Airways
Sat 4/28
FCO - ONT • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Rome Fiumicino Airport and Ontario. You'll need to take a connecting flight to reach the destination.
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Insights
When to travel
July
Cheapest • 5% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Dallas/Fort Worth (DFW)
Cheapest • Avg $545 (round-trip)
Denver Intl (DEN)
Shortest trip • 14h 40m (one-way)
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Insights
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Flight Deals

Cheap Flights from Rome to Ontario (FCO-ONT)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Rome to Ontario

Wed, Jan 13 - Mon, Feb 1
United Airlines Logo
7:05 am - 8:01 pmFCO  Rome Fiumicino-ONT Ontario
21h 56m2 stops Frankfurt am Main San Francisco
United Airlines Logo
6:00 am - 7:55 amONT  Ontario-FCO Rome Fiumicino
16h 55m2 stops San Francisco Newark
$612United Airlines
Sat, Jan 23 - Sun, Jan 31
United Airlines Logo
9:55 am - 8:01 pmFCO  Rome Fiumicino-ONT Ontario
19h 06m2 stops Frankfurt am Main San Francisco
United Airlines Logo
6:00 am - 7:55 amONT  Ontario-FCO Rome Fiumicino
16h 55m2 stops San Francisco Newark
$614United Airlines
Mon, Feb 1 - Wed, Feb 17
United Airlines Logo
9:55 am - 10:30 pmFCO  Rome Fiumicino-ONT Ontario
21h 35m2 stops Frankfurt am Main San Francisco
United Airlines Logo
7:00 am - 8:30 amONT  Ontario-FCO Rome Fiumicino
16h 30m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl
$617United Airlines
Fri, Nov 20 - Tue, Nov 24
Multiple Airlines Logo
1:10 pm - 8:35 amFCO  Rome Fiumicino-ONT Ontario
28h 25m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl
Multiple Airlines Logo
9:20 am - 10:45 amONT  Ontario-FCO Rome Fiumicino
40h 25m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth
$623Multiple Airlines
Thu, Feb 18 - Mon, Feb 22
United Airlines Logo
7:05 am - 10:22 amFCO  Rome Fiumicino-ONT Ontario
36h 17m2 stops Munich Franz Josef Strauss San Francisco
United Airlines Logo
7:00 am - 7:45 amONT  Ontario-FCO Rome Fiumicino
15h 45m1 stop Chicago O'Hare Intl
$625United Airlines
Thu, Feb 18 - Mon, Feb 22
United Airlines Logo
7:05 am - 10:22 amFCO  Rome Fiumicino-ONT Ontario
36h 17m2 stops Munich Franz Josef Strauss San Francisco
United Airlines Logo
11:27 am - 7:45 amONT  Ontario-FCO Rome Fiumicino
35h 18m2 stops San Francisco Chicago O'Hare Intl
$626United Airlines
Fri, Nov 20 - Tue, Nov 24
Multiple Airlines Logo
1:10 pm - 10:36 pmFCO  Rome Fiumicino-ONT Ontario
18h 26m1 stop Dallas/Fort Worth
Multiple Airlines Logo
9:20 am - 10:45 amONT  Ontario-FCO Rome Fiumicino
40h 25m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth
$627Multiple Airlines
Thu, Feb 18 - Mon, Feb 22
United Airlines Logo
7:05 am - 10:22 amFCO  Rome Fiumicino-ONT Ontario
36h 17m2 stops Munich Franz Josef Strauss San Francisco
United Airlines Logo
11:27 am - 7:45 amONT  Ontario-FCO Rome Fiumicino
35h 18m2 stops San Francisco Chicago O'Hare Intl
$630United Airlines
Fri, Nov 20 - Tue, Nov 24
Multiple Airlines Logo
1:10 pm - 9:47 amFCO  Rome Fiumicino-ONT Ontario
29h 37m1 stop Dallas/Fort Worth
Multiple Airlines Logo
7:00 am - 10:45 amONT  Ontario-FCO Rome Fiumicino
18h 45m1 stop Dallas/Fort Worth
$632Multiple Airlines
Sat, Nov 21 - Tue, Dec 1
British Airways Logo
1:10 pm - 10:36 pmFCO  Rome Fiumicino-ONT Ontario
18h 26m1 stop Dallas/Fort Worth
British Airways Logo
2:09 pm - 7:40 pmONT  Ontario-FCO Rome Fiumicino
20h 31m2 stops Dallas/Fort Worth London Heathrow
$634British Airways
Booking Insights

Price, demand and travel trends for Rome Fiumicino Airport to Ontario flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Rome Fiumicino Airport to Ontario?

Round-trip flights from Rome Fiumicino Airport to Ontario typically range from $590 to $796. The lowest price found in the past 5 days was $612, on United Airlines.

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Key details for Rome Fiumicino Airport to Ontario flights

Cheapest flight

$396
The most popular month to fly with an average 59% increase in travelers.
One-way flight from Rome Fiumicino Airport to Ontario

When to book flights from Rome to Ontario

Are your dates flexible? Find out the best times to travel from Rome to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Rome Fiumicino Airport to Ontario flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Rome Fiumicino Airport to Ontario?

    Only Economy Class is available on flights from Rome Fiumicino Airport to Ontario.

  • How long is a flight from Rome Fiumicino Airport to Ontario?

    A nonstop flight from Rome Fiumicino Airport to Ontario takes 00m, covering 6,303 miles.

  • Do I need a passport to fly from Rome Fiumicino Airport to Ontario?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Rome Fiumicino Airport to Ontario flight?

    Round-trip flights from Rome Fiumicino Airport to Ontario range from $590 to $796, with an average of $688 over the past 12 months. Anything below $590 counts as a good deal.

  • Have flight prices from Rome Fiumicino Airport to Ontario changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $612 to $4,187. That means the highest observed fare was about 7x higher than the lowest one.

  • How are flight prices from Rome Fiumicino Airport to Ontario looking right now?

    One-way fares from Rome Fiumicino Airport to Ontario are currently lower than usual. Average one-way flight prices are about $407, which is 35% below the typical average for this route.

  • What car rental options are available at Ontario Airport (ONT)?

    Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates averaging $60 for economy cars. Top options include:

    • Fox
    • Europcar
    • Thrifty
    • Alamo
    • Dollar

  • Which airports can I use when flying from Rome Fiumicino Airport to Ontario?

    Flights from Rome Fiumicino Airport to Ontario usually depart from Rome Fiumicino (FCO) and arrive at Ontario (ONT).

  • Which airports do connecting flights from Rome Fiumicino Airport to Ontario pass through?

    One-stop flights from Rome Fiumicino Airport to Ontario most commonly connect through:

    • Dallas/Fort Worth (DFW) - 35% of one-stop connections
    • Denver Intl (DEN) - 24% of one-stop connections
    • Chicago O'Hare Intl (ORD) - 24% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) - 6% of one-stop connections

  • Can I save money by using flexible dates for flights from Rome Fiumicino Airport to Ontario?

    Yes. Flexible dates can save you up to 37% on flights from Rome Fiumicino Airport to Ontario. Wednesday is the cheapest departure day at $564 round-trip on average, while Thursday is the most expensive at $889, a difference of $325.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Rome Fiumicino Airport to Ontario?

    Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time at 14h 40m, compared with 16h 50m via San Francisco (SFO) and 18h 19m via Atlanta Hartsfield-Jackson (ATL).

  • What is the time difference between Rome Fiumicino Airport and Ontario?

    Ontario is 9 hours behind Rome Fiumicino Airport (Pacific Time vs Central European Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Ontario?

    Some of the most popular sights in Ontario are Ontario Convention Center and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

Your guide to booking Rome Fiumicino Airport to Ontario flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Thursday. On this route, Wednesday flights average $564, about $325 less than Thursday fares (37% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Rome Fiumicino Airport to Ontario trip for July. Fares historically average $655 round-trip in that month - typically $360 less than the most expensive month, which is October (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.

    • Ontario Airport Inn
    • Azure Hotel & Suites, Trademark Collection by Wyndham
    • Holiday Inn Ontario Airport By IHG

More options for your flight from Rome to Ontario

Complete your trip to Ontario with a hotel stay or car rental

Car rentals in Ontario
Hotels in Ontario
Vacations in Ontario