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$374+ 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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
FCO — ONT
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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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 September 11, 2025.

Round-trip from

$654
(American Airlines)

One-way from

$374
(Trip.com)

Popular in

January

Cheapest in

May

Average price

$694
From Rome Fiumicino to Ontario
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One-way flight from Rome Fiumicino to Ontario
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Highest demand for flights based on searches. 5% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/9. 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.
Thu 9/2512:10 pmFCO - ONT
1 stop18h 01mAmerican Airlines
Mon 9/2912:45 pmONT - FCO
2 stops18h 10mAmerican Airlines
Deal found 9/9$654
This Finnair deal was found by Cheapflights users on 9/9. 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.
Fri 11/711:35 amFCO - ONT
1 stop19h 54mMultiple Airlines
Sun 11/910:47 amONT - FCO
1 stop14h 58mMultiple Airlines
Deal found 9/9$656
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Thu 9/2512:10 pmFCO - ONT
1 stop18h 01mAmerican Airlines
Sat 10/1110:29 pmONT - FCO
1 stop26h 21mAmerican Airlines
Deal found 9/11$666
This British Airways deal was found by Cheapflights users on 9/9. 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.
Thu 9/2512:10 pmFCO - ONT
1 stop18h 01mBritish Airways
Mon 9/296:10 amONT - FCO
1 stop16h 55mBritish Airways
Deal found 9/9$668
This Iberia deal was found by Cheapflights users on 9/11. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:35 amFCO - ONT
1 stop19h 48mIberia
Sat 11/1512:53 pmONT - FCO
1 stop36h 52mIberia
Deal found 9/11$689
This Iberia deal was found by Cheapflights users on 9/9. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:00 pmFCO - ONT
1 stop18h 19mIberia
Sun 12/76:30 amONT - FCO
1 stop19h 05mIberia
Deal found 9/9$699
This Iberia deal was found by Cheapflights users on 9/11. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:35 amFCO - ONT
1 stop21h 22mIberia
Mon 11/177:00 amONT - FCO
2 stops21h 55mIberia
Deal found 9/11$703
This Finnair deal was found by Cheapflights users on 9/10. 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.
Sat 12/61:00 pmFCO - ONT
1 stop18h 28mMultiple Airlines
Mon 12/2910:50 amONT - FCO
1 stop14h 45mMultiple Airlines
Deal found 9/10$708
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Tue 9/1610:00 amFCO - ONT
1 stop17h 54mAmerican Airlines
Mon 9/298:15 amONT - FCO
1 stop14h 50mAmerican Airlines
Deal found 9/9$709
This Iberia deal was found by Cheapflights users on 9/11. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/78:20 pmFCO - ONT
2 stops24h 34mIberia
Mon 11/177:00 amONT - FCO
2 stops21h 55mIberia
Deal found 9/11$711
This Iberia deal was found by Cheapflights users on 9/9. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:00 pmFCO - ONT
1 stop18h 19mIberia
Sat 12/612:53 pmONT - FCO
1 stop36h 42mIberia
Deal found 9/9$712

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 September 11, 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

Thu 9/25

12:10 pm-9:11 pm

1 stop18h 01m

Ontario

Mon 9/29

12:45 pm-3:55 pm

2 stops18h 10m

$654

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Fri 11/14

11:35 am-10:29 pm

1 stop19h 54m

Ontario

Sun 11/16

10:47 am-10:45 am

1 stop14h 58m

$656

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 9/25

12:10 pm-9:11 pm

1 stop18h 01m

Ontario

Sat 10/11

10:29 pm-9:50 am

1 stop26h 21m

$666

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 9/25

12:10 pm-9:11 pm

1 stop18h 01m

Ontario

Mon 9/29

6:10 am-8:05 am

1 stop16h 55m

$668

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 12/4

1:00 pm-10:19 pm

1 stop18h 19m

Ontario

Sun 12/7

6:30 am-10:35 am

1 stop19h 05m

$699

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Sat 12/6

1:00 pm-10:28 pm

1 stop18h 28m

Ontario

Mon 12/29

10:50 am-10:35 am

1 stop14h 45m

$708

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 12/3

8:20 pm-11:55 pm

2 stops36h 35m

Ontario

Sun 12/7

6:00 am-10:35 am

1 stop19h 35m

$721

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Sat 12/13

7:00 am-10:49 pm

2 stops24h 49m

Ontario

Thu 1/8

7:00 am-12:40 pm

2 stops20h 40m

$724

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 12/24

9:45 am-12:38 pm

2 stops35h 53m

Ontario

Tue 1/6

5:05 am-1:25 pm

2 stops23h 20m

$724

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 1/21

7:05 am-12:47 pm

2 stops38h 42m

Ontario

Sun 1/25

1:20 pm-1:25 pm

2 stops39h 05m

$724

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 23 results
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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, August is the cheapest month in which you can book a flight from Rome Fiumicino Airport to Ontario (average of $246). Flying from Rome Fiumicino Airport to Ontario in March is currently the most expensive (average of $328). 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 $654, American Airlines can have you in Ontario from Rome Fiumicino Airport in 18h 01m. The distance from Rome Fiumicino Airport to Ontario is about 6303 mi. This flight may include one or multiple stops.

  • 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, August is the cheapest month in which you can book a flight from Rome Fiumicino Airport to Ontario (average of $246). Flying from Rome Fiumicino Airport to Ontario in March is currently the most expensive (average of $328). 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.

See more FAQs

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