Leonardo da Vinci/Fiumicino

$373+ 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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — FCO
nov. 15 — nov. 221
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

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 octubre 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$466
(Delta)

One-way from

$373
(Mytrip)

Popular in

June

Cheapest in

December

Average price

$868
Provider with most accurate pricing for Ontario-Rome Fiumicino flight deals.
Provider most trusted by Cheapflights users for Ontario-Rome Fiumicino flights.
From Ontario to Rome Fiumicino
One-way flight from Ontario to Rome Fiumicino
Highest demand for flights based on searches. 22% potential increase in price ($263 potential increase over avg. RT price).
Cheapest flight prices on average. 7% potential price decrease ($61 potential savings vs. average RT price).
Average for round-trip flights in October 2025

Find 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 octubre 16, 2025.

This Delta deal was found by Cheapflights users on 10/15. 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.
lun. 12/87:05 amONT - FCO
1 stop18h 25mDelta
mié. 12/2410:05 amFCO - ONT
1 stop18h 45mDelta
Deal found 10/15$466
This AirNGo deal was found by Cheapflights users on 10/16. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/77:05 amONT - FCO
1 stop15h 50mKLM
mar. 12/2310:05 amFCO - ONT
1 stop18h 45mKLM
Deal found 10/16$474
This Delta deal was found by Cheapflights users on 10/15. 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.
mar. 11/1110:25 pmONT - FCO
1 stop24h 30mDelta
jue. 11/2011:05 amFCO - ONT
2 stops21h 47mDelta
Deal found 10/15$480
This Delta deal was found by Cheapflights users on 10/16. 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.
dom. 11/2310:25 pmONT - FCO
1 stop27h 05mDelta
jue. 12/412:40 pmFCO - ONT
1 stop19h 24mDelta
Deal found 10/16$481
This Delta deal was found by Cheapflights users on 10/16. 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.
mar. 11/1110:25 pmONT - FCO
1 stop24h 30mDelta
vie. 11/219:20 amFCO - ONT
2 stops58h 46mDelta
Deal found 10/16$491
This KLM deal was found by Cheapflights users on 10/14. 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.
lun. 11/177:05 amONT - FCO
1 stop15h 50mKLM
mar. 11/256:10 amFCO - ONT
2 stops19h 59mKLM
Deal found 10/14$492
This United Airlines deal was found by Cheapflights users on 10/14. 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.
lun. 11/175:05 amONT - FCO
2 stops20h 50mUnited Airlines
mar. 11/251:05 pmFCO - ONT
2 stops42h 26mUnited Airlines
Deal found 10/14$494
This KLM deal was found by Cheapflights users on 10/15. 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.
mié. 10/2211:36 amONT - FCO
1 stop14h 29mKLM
mié. 11/510:05 amFCO - ONT
1 stop18h 14mKLM
Deal found 10/15$497
This United Airlines deal was found by Cheapflights users on 10/15. 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.
mié. 11/127:00 amONT - FCO
1 stop15h 45mUnited Airlines
vie. 11/217:05 amFCO - ONT
2 stops24h 26mUnited Airlines
Deal found 10/15$502
This United Airlines deal was found by Cheapflights users on 10/15. 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.
dom. 11/97:00 amONT - FCO
1 stop15h 45mUnited Airlines
mar. 11/187:00 amFCO - ONT
2 stops19h 34mUnited Airlines
Deal found 10/15$504
This Finnair deal was found by Cheapflights users on 10/15. 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.
mié. 11/1210:47 amONT - FCO
1 stop14h 58mMultiple Airlines
vie. 11/2111:00 amFCO - ONT
1 stop20h 23mMultiple Airlines
Deal found 10/15$506

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 octubre 16, 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

lun. 11/17

5:05 am-10:55 am

2 stops20h 50m

Rome Fiumicino

mar. 11/25

1:05 pm-10:31 pm

2 stops42h 26m

$494

OntarioRome

ONT - FCO

ONTFCO

Ontario

dom. 12/7

10:47 am-10:45 am

1 stop14h 58m

Rome Fiumicino

mar. 12/23

1:10 pm-10:14 pm

1 stop18h 04m

$497

OntarioRome

ONT - FCO

ONTFCO

Ontario

mié. 11/12

11:44 am-7:45 pm

2 stops23h 01m

Rome Fiumicino

jue. 11/20

11:05 am-11:52 pm

2 stops21h 47m

$498

OntarioRome

ONT - FCO

ONTFCO

Ontario

mié. 11/12

7:00 am-7:45 am

1 stop15h 45m

Rome Fiumicino

vie. 11/21

7:05 am-10:31 pm

2 stops24h 26m

$502

OntarioRome

ONT - FCO

ONTFCO

Ontario

mar. 1/20

5:05 am-9:25 am

2 stops19h 20m

Rome Fiumicino

mié. 2/4

9:45 am-10:53 pm

2 stops22h 08m

$502

OntarioRome

ONT - FCO

ONTFCO

Ontario

mar. 11/11

1:33 pm-8:55 am

2 stops34h 22m

Rome Fiumicino

vie. 11/21

9:45 am-10:31 pm

1 stop21h 46m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

dom. 3/8

11:29 am-9:10 am

2 stops37h 41m

Rome Fiumicino

vie. 3/20

6:00 am-10:38 pm

2 stops24h 38m

$522

OntarioRome

ONT - FCO

ONTFCO

Ontario

mar. 1/13

5:05 am-9:25 am

2 stops19h 20m

Rome Fiumicino

lun. 1/26

1:30 pm-10:53 pm

2 stops18h 23m

$527

OntarioRome

ONT - FCO

ONTFCO

Ontario

jue. 11/13

5:05 am-7:45 am

2 stops17h 40m

Rome Fiumicino

vie. 11/21

7:05 am-10:31 pm

2 stops24h 26m

$532

OntarioRome

ONT - FCO

ONTFCO

Ontario

jue. 11/13

7:00 am-10:55 am

2 stops18h 55m

Rome Fiumicino

mar. 11/25

7:05 am-10:51 pm

3 stops24h 46m

$532

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/16

Showing 1-10 of 22 results
1
2
3

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Rome Fiumicino Airport flight deals on Cheapflights vs. FlightHub >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 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 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 $374). 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 octubre 16, 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.

How much does it cost to fly round-trip from Ontario to Rome Fiumicino Airport?

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 octubre 16, 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.

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

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.

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

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.

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

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.

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

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.

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

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 20h 50m. Fly via Delta or United Airlines to get the fastest option. The distance between Ontario and Rome Fiumicino Airport is about 6303 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 KLM - these airlines can fly you to your destination from $514 and $520, respectively. Delta is priced at 47% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Ontario to Rome Fiumicino Airport one-way?

    The cheapest airlines for a one-way flight from Ontario to Rome Fiumicino Airport are British Airways ($374), Iberia ($377), and Delta ($386).

  • 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 $374). 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
Gaeta
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.

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 octubre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$479Average$590FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$514Average$613FlexibilityNo cancel feeOn-time70%
KLMCheapest$520Average$704FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$570Average$791FlexibilityNo cancel feeOn-time69%

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.