HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Leonardo da Vinci/Fiumicino

$234+ Cheap flights from Ontario (ONT) to Fiumicino (FCO)

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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — FCO
Jan 1 — Jan 81
Thu 1/1
Thu 1/8
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Leonardo da Vinci/Fiumicino with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Leonardo da Vinci/Fiumicino

Cheapest flights from Ontario to Leonardo da Vinci/Fiumicino
Explore the most affordable flight options available from Ontario to Leonardo da Vinci/Fiumicino. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 2, 2025.

This oojo deal was found by Cheapflights users on 12/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:10 amONT - FCO
1 stop19h 35mBritish Airways
Wed 1/148:30 pmFCO - ONT
2 stops34h 43mBritish Airways
Deal found 12/1$469
This Delta deal was found by Cheapflights users on 12/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3111:15 amONT - FCO
1 stop14h 15mDelta
Fri 1/166:00 amFCO - ONT
2 stops25h 51mDelta
Deal found 12/1$477
This Delta deal was found by Cheapflights users on 12/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/97:05 amONT - FCO
1 stop18h 25mDelta
Thu 4/912:15 pmFCO - ONT
1 stop17h 49mDelta
Deal found 12/2$486
This Delta deal was found by Cheapflights users on 12/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3111:15 amONT - FCO
1 stop14h 15mDelta
Sat 1/176:00 amFCO - ONT
2 stops25h 51mDelta
Deal found 12/1$488
This Delta deal was found by Cheapflights users on 12/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/910:25 pmONT - FCO
2 stops25h 15mDelta
Tue 4/1410:10 amFCO - ONT
2 stops34h 10mDelta
Deal found 12/2$491
This Delta deal was found by Cheapflights users on 12/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/910:25 pmONT - FCO
2 stops25h 15mDelta
Wed 4/1512:20 pmFCO - ONT
2 stops38h 55mDelta
Deal found 12/2$496
This United Airlines deal was found by Cheapflights users on 11/30. 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.
Wed 12/35:05 amONT - FCO
2 stops19h 20mUnited Airlines
Wed 12/109:45 amFCO - ONT
2 stops19h 57mUnited Airlines
Deal found 11/30$502
This KLM deal was found by Cheapflights users on 11/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:05 amONT - FCO
1 stop15h 50mKLM
Wed 12/1012:40 pmFCO - ONT
1 stop19h 24mKLM
Deal found 11/30$506
This Delta deal was found by Cheapflights users on 12/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/97:05 amONT - FCO
1 stop18h 25mDelta
Mon 4/1312:45 pmFCO - ONT
2 stops42h 55mDelta
Deal found 12/2$507
This Delta deal was found by Cheapflights users on 12/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/97:05 amONT - FCO
1 stop18h 25mDelta
Fri 4/1010:35 amFCO - ONT
2 stops34h 42mDelta
Deal found 12/2$508

Find flight deals from Ontario to Leonardo da Vinci/Fiumicino

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Leonardo da Vinci/Fiumicino (FCO). 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 December 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$459
(oojo)

One-way from

$234
(oojo)

Popular in

June

Cheapest in

October

Average price

$969
Provider with most accurate pricing for Ontario-Rome Fiumicino flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Rome Fiumicino flights.
Search Deals
From Ontario to Rome Fiumicino
Search Deals
One-way flight from Ontario to Rome Fiumicino
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($232 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($61 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Leonardo da Vinci/Fiumicino 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 December 2, 2025.
Use the filters below to find and compare flights from Ontario to Rome Fiumicino Airport that are best for you.

Fly from

Ontario

Fly to

Leonardo da Vinci/Fiumicino

Route

Depart

Return

Price

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 1/26

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Thu 2/5

12:40 pm-11:31 am

1 stop31h 51m

$467

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 1/25

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Thu 2/5

12:40 pm-11:31 am

1 stop31h 51m

$467

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 1/27

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Fri 2/6

12:40 pm-11:31 am

1 stop31h 51m

$467

OntarioRome

ONT - FCO

ONTFCO

Ontario

Fri 1/16

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Fri 1/30

12:40 pm-11:31 am

1 stop31h 51m

$473

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 1/28

6:00 am-10:30 am

2 stops19h 30m

Rome Fiumicino

Sun 2/1

12:45 pm-11:58 pm

2 stops44h 13m

$486

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 2/25

10:20 pm-10:30 am

1 stop27h 10m

Rome Fiumicino

Tue 3/3

12:40 pm-12:02 pm

1 stop32h 22m

$492

OntarioRome

ONT - FCO

ONTFCO

Ontario

Fri 1/16

4:45 pm-9:55 pm

2 stops20h 10m

Rome Fiumicino

Fri 1/30

8:35 am-10:48 pm

2 stops23h 13m

$498

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 1/14

1:53 pm-11:00 pm

2 stops24h 07m

Rome Fiumicino

Sun 1/18

7:00 am-5:43 pm

2 stops43h 43m

$513

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 4/11

11:59 pm-12:05 pm

1 stop27h 06m

Rome Fiumicino

Thu 4/23

1:25 pm-9:56 pm

1 stop17h 31m

$522

OntarioRome

ONT - FCO

ONTFCO

Ontario

Thu 1/8

1:24 pm-5:50 pm

2 stops19h 26m

Rome Fiumicino

Fri 1/16

10:30 am-10:53 pm

2 stops21h 23m

$530

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/1

Showing 1-10 of 19 results
1
2

Compare providers for flights from Ontario to Leonardo da Vinci/Fiumicino

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Leonardo da Vinci/Fiumicino in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Rome Fiumicino Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Rome Fiumicino Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Rome Fiumicino Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Rome Fiumicino Airport flights, Cheapflights users trust eDreams the most. eDreams 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 Ontario-Rome Fiumicino Airport 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 Ontario to Leonardo da Vinci/Fiumicino

Have a flexible travel schedule? Discover the best time to fly to Leonardo da Vinci/Fiumicino from Ontario 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 Ontario to Rome Fiumicino Airport

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

Currently, April is the cheapest month in which you can book a flight from Ontario to Rome Fiumicino Airport (average of $375). Flying from Ontario to Rome Fiumicino Airport in June is currently the most expensive (average of $598). 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.

What is the cheapest time of day to fly from ONT to FCO?

Find hourly flight availability from Ontario to Leonardo da Vinci/Fiumicino. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 2, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 26% on flights from Ontario to Rome Fiumicino Airport by exploring options for tickets in the afternoon.

Reviews of airlines servicing Leonardo da Vinci/Fiumicino

Get insights into the airlines that provide service to Leonardo da Vinci/Fiumicino. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Leonardo da Vinci/Fiumicino. Reviews last updated December 2, 2025.
Read reviews from past customers who have flown Delta, KLM, and United Airlines from Ontario to Rome Fiumicino Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,011 reviews

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
7.9
Good
8,011 reviews
Delta
7.9
Good
8,011 reviews

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.7
Good
1,426 reviews
Delta
7.9
Good
8,011 reviews

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
9,063 reviews
Delta
7.9
Good
8,011 reviews

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.7
Okay
7,550 reviews
Delta
7.9
Good
8,011 reviews

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Leonardo da Vinci/Fiumicino. 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 from for flights from Ontario to Rome Fiumicino?

    For a flight from Ontario to Rome Fiumicino, you will be flying from Ontario. Ontario (ONT) is just 3.1 mi from the center of the city. Ontario is the only Ontario airport and it handles 0 outbound flights to Rome Fiumicino per day. 4 airlines have flights to Rome Fiumicino from Ontario on a regular basis.

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

    There are many flights that can get you from Ontario to Rome Fiumicino Airport in 27h. Fly via Delta to get the fastest option. The distance between Ontario and Rome Fiumicino Airport is about 6303 mi.

  • What are the cheapest airlines flying from Ontario to Rome Fiumicino Airport round-trip?

    Currently priced at $479, Delta will fly you from Ontario to Rome Fiumicino Airport and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from British Airways and United Airlines - these airlines can fly you to your destination from $487 and $508, respectively. Delta is priced at 46% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Leonardo da Vinci/Fiumicino 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 Ontario to Rome Fiumicino Airport?

    Currently, April is the cheapest month in which you can book a flight from Ontario to Rome Fiumicino Airport (average of $375). Flying from Ontario to Rome Fiumicino Airport in June is currently the most expensive (average of $598). 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

Traveling to a place near Rome Fiumicino Airport?

Book flights to Rome Fiumicino Airport if you plan to visit one of these locations
Fiumicino
Montepulciano
Santa Marinella

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Leonardo da Vinci/Fiumicino

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Leonardo da Vinci/Fiumicino flights
San Francisco to Leonardo da Vinci/Fiumicino flights
Santa Ana to Leonardo da Vinci/Fiumicino flights
San Jose to Leonardo da Vinci/Fiumicino flights
Los Angeles to Ciampino flights
San Diego to Leonardo da Vinci/Fiumicino flights
Burbank to Leonardo da Vinci/Fiumicino flights
Oakland to Leonardo da Vinci/Fiumicino flights
Sacramento to Leonardo da Vinci/Fiumicino flights
San Francisco to Ciampino flights
Las Vegas to Leonardo da Vinci/Fiumicino flights
Palm Springs to Leonardo da Vinci/Fiumicino flights
Reno to Leonardo da Vinci/Fiumicino flights
Fresno to Leonardo da Vinci/Fiumicino flights
Santa Barbara to Leonardo da Vinci/Fiumicino flights
Long Beach to Leonardo da Vinci/Fiumicino flights
San Luis Obispo to Leonardo da Vinci/Fiumicino flights
Santa Rosa to Leonardo da Vinci/Fiumicino flights
Medford to Leonardo da Vinci/Fiumicino flights
Monterey to Leonardo da Vinci/Fiumicino flights
Redding to Leonardo da Vinci/Fiumicino flights
Arcata to Leonardo da Vinci/Fiumicino flights
Las Vegas to Ciampino flights
Oakland to Ciampino flights

Top 4 airlines flying from Ontario to Leonardo da Vinci/Fiumicino

Discover the top 4 airlines that operate flights from Ontario to Leonardo da Vinci/Fiumicino. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$479Average$590FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$487Average$604FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$508Average$776FlexibilityNo cancel feeOn-time69%
KLMCheapest$520Average$704FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.