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$432+ Cheap flights from Fiumicino (FCO) to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
FCO — ONT
nov. 26 — déc. 31
mer. 11/26
mer. 12/3
1 adult, Economy
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Find flight deals from Leonardo da Vinci/Fiumicino to Ontario

Cheapest flights from Leonardo da Vinci/Fiumicino to Ontario
Explore the most affordable flight options available from Leonardo da Vinci/Fiumicino to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octobre 27, 2025.

This United Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 11/127:05 amFCO - ONT
2 stops24h 26mUnited Airlines
dim. 11/167:00 amONT - FCO
1 stop15h 45mUnited Airlines
Deal found 10/27$628
This Finnair deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 11/2111:00 amFCO - ONT
1 stop20h 23mMultiple Airlines
ven. 12/510:47 amONT - FCO
1 stop14h 58mMultiple Airlines
Deal found 10/27$642
This American Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 11/2112:20 pmFCO - ONT
2 stops20h 37mAmerican Airlines
ven. 12/57:00 amONT - FCO
2 stops17h 00mAmerican Airlines
Deal found 10/26$654
This Finnair deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 12/41:10 pmFCO - ONT
1 stop19h 45mMultiple Airlines
jeu. 12/1110:47 amONT - FCO
1 stop14h 58mMultiple Airlines
Deal found 10/26$673
This Finnair deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 12/141:10 pmFCO - ONT
1 stop18h 05mMultiple Airlines
mar. 12/3010:50 amONT - FCO
1 stop14h 55mMultiple Airlines
Deal found 10/26$722
This lol.travel deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 11/2111:00 amFCO - ONT
1 stop20h 23mBritish Airways
ven. 12/510:47 amONT - FCO
1 stop14h 58mBritish Airways
Deal found 10/26$734
This British Airways deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 11/128:30 pmFCO - ONT
2 stops30h 52mBritish Airways
dim. 11/1610:47 amONT - FCO
1 stop14h 58mBritish Airways
Deal found 10/27$744
This Finnair deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 12/61:10 pmFCO - ONT
1 stop18h 18mMultiple Airlines
sam. 12/1310:47 amONT - FCO
1 stop14h 58mMultiple Airlines
Deal found 10/26$748
This Finnair deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 12/211:10 pmFCO - ONT
1 stop18h 04mMultiple Airlines
dim. 12/2810:50 amONT - FCO
1 stop14h 55mMultiple Airlines
Deal found 10/26$753

Cheap flight deals from Leonardo da Vinci/Fiumicino to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Leonardo da Vinci/Fiumicino (FCO) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated octobre 27, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$628
(United Airlines)

One-way from

$432
(Trip.com)

Popular in

January

Cheapest in

November

Average price

$597
Provider with most accurate pricing for Rome Fiumicino-Ontario flight deals.
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Provider most trusted by Cheapflights users for Rome Fiumicino-Ontario flights.
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From Rome Fiumicino to Ontario
Search Deals
One-way flight from Rome Fiumicino to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($60 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Leonardo da Vinci/Fiumicino 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, Cheapflights users made 2,558,603 searches. Data last updated octobre 27, 2025.
Use the filters below to find and compare flights from Rome Fiumicino Airport to Ontario that are best for you.

Fly from

Leonardo da Vinci/Fiumicino

Fly to

Ontario

Route

Depart

Return

Price

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

mer. 11/12

7:05 am-10:51 pm

2 stops24h 46m

Ontario

dim. 11/16

6:05 am-8:30 am

2 stops17h 25m

$628

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

ven. 11/21

11:00 am-10:23 pm

1 stop20h 23m

Ontario

ven. 12/5

10:47 am-10:45 am

1 stop14h 58m

$642

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

sam. 11/8

9:45 am-10:31 pm

1 stop21h 46m

Ontario

sam. 11/15

5:05 am-7:45 am

2 stops17h 40m

$643

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

jeu. 11/13

11:00 am-10:23 pm

1 stop20h 23m

Ontario

mer. 11/26

10:47 am-10:45 am

1 stop14h 58m

$644

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

ven. 11/14

9:45 am-10:31 pm

1 stop21h 46m

Ontario

mar. 11/25

7:00 am-7:45 am

1 stop15h 45m

$644

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

jeu. 12/18

1:10 pm-11:46 pm

1 stop19h 36m

$457

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

ven. 2/27

12:20 pm-11:43 pm

2 stops20h 23m

$460

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

lun. 4/20

1:25 pm-9:56 pm

1 stop17h 31m

$461

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

jeu. 4/16

1:25 pm-9:56 pm

1 stop17h 31m

$461

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

lun. 12/22

1:10 pm-11:46 pm

1 stop19h 36m

$461

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 16 results
1
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  • Most accurate provider: When it comes to deals on Rome Fiumicino Airport-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Rome Fiumicino Airport-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Rome Fiumicino Airport-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Rome Fiumicino Airport-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Rome Fiumicino Airport-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Leonardo da Vinci/Fiumicino to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Leonardo da Vinci/Fiumicino with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Rome Fiumicino Airport to Ontario

What is the cheapest month to book a flight from Rome Fiumicino Airport to Ontario?

Currently, September is the cheapest month in which you can book a flight from Rome Fiumicino Airport to Ontario (average of $351). Flying from Rome Fiumicino Airport to Ontario in August is currently the most expensive (average of $638). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Leonardo da Vinci/Fiumicino to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Rome Fiumicino?

    If you book a flight to Ontario from Rome Fiumicino, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario. There are 0 flights from Rome Fiumicino to Ontario per day from 0 different airlines.

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

    For as low as $628, United Airlines can have you in Ontario from Rome Fiumicino Airport in 24h 46m. The distance from Rome Fiumicino Airport to Ontario is about 6303 mi.

  • Can I find deals for flights from Leonardo da Vinci/Fiumicino to Ontario that include hotel bookings?

    Yes. In addition to deals on Leonardo da Vinci/Fiumicino to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Leonardo da Vinci/Fiumicino to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Leonardo da Vinci/Fiumicino to Ontario.

  • Can I find deals for business class flights from Leonardo da Vinci/Fiumicino to Ontario?

    Yes. Cheapflights offers flight deals from Leonardo da Vinci/Fiumicino to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Rome Fiumicino Airport to Ontario?

    Currently, September is the cheapest month in which you can book a flight from Rome Fiumicino Airport to Ontario (average of $351). Flying from Rome Fiumicino Airport to Ontario in August is currently the most expensive (average of $638). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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