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Leonardo da Vinci/Fiumicino

$340+ 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — FCO
Jul 10 — Jul 171
Fri 7/10
Fri 7/17
1 adult, Economy
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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 June 10, 2026.

This United Airlines deal was found by Cheapflights users on 6/7. 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.
Sun 11/85:00 am
ONT
-
FCO
1 stop21h 55m
United Airlines
Wed 11/181:15 pm
FCO
-
ONT
2 stops42h 11m
United Airlines
Deal found 6/7$707
This Air Canada deal was found by Cheapflights users on 6/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:00 am
ONT
-
FCO
2 stops16h 55m
Multiple Airlines
Wed 11/251:15 pm
FCO
-
ONT
2 stops42h 11m
Multiple Airlines
Deal found 6/6$711
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Tue 11/175:00 am
ONT
-
FCO
1 stop21h 55m
United Airlines
Thu 11/2611:15 am
FCO
-
ONT
2 stops44h 11m
United Airlines
Deal found 6/8$712
This KLM deal was found by Cheapflights users on 6/8. 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 12/97:00 am
ONT
-
FCO
1 stop16h 15m
KLM
Wed 12/231:30 pm
FCO
-
ONT
1 stop17h 44m
KLM
Deal found 6/8$713
This oojo deal was found by Cheapflights users on 6/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:00 am
ONT
-
FCO
1 stop18h 45m
British Airways
Tue 11/241:00 pm
FCO
-
ONT
1 stop19h 57m
British Airways
Deal found 6/9$714
This Delta deal was found by Cheapflights users on 6/6. 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.
Mon 11/2312:00 pm
ONT
-
FCO
1 stop14h 20m
Delta
Wed 12/91:30 pm
FCO
-
ONT
1 stop17h 44m
Delta
Deal found 6/6$717
This oojo deal was found by Cheapflights users on 6/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1212:33 pm
ONT
-
FCO
1 stop14h 32m
British Airways
Fri 8/281:10 pm
FCO
-
ONT
1 stop38h 48m
British Airways
Deal found 6/9$719
This Travelocity deal was found by Cheapflights users on 6/8. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/175:00 am
ONT
-
FCO
2 stops20h 55m
Air Canada
Thu 11/2611:15 am
FCO
-
ONT
2 stops39h 32m
Air Canada
Deal found 6/8$720
This oojo deal was found by Cheapflights users on 6/8. 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.
Tue 8/182:27 pm
ONT
-
FCO
1 stop36h 38m
British Airways
Wed 8/261:10 pm
FCO
-
ONT
1 stop18h 49m
British Airways
Deal found 6/8$725
This United Airlines deal was found by Cheapflights users on 6/6. 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 11/255:00 am
ONT
-
FCO
1 stop21h 55m
United Airlines
Fri 12/119:55 am
FCO
-
ONT
2 stops22h 11m
United Airlines
Deal found 6/6$726
This KLM deal was found by Cheapflights users on 6/8. 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.
Tue 12/17:00 am
ONT
-
FCO
1 stop16h 15m
KLM
Tue 12/81:30 pm
FCO
-
ONT
1 stop17h 44m
KLM
Deal found 6/8$727

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 June 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$707
(United Airlines)

One-way from

$340
(Cheapflightsfares)

Popular in

May

Cheapest in

October

Average price

$1,049
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. 16% potential increase in price ($160 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
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 June 10, 2026.
Use the filters below to find and compare flights from Ontario to Rome Fiumicino Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 11/8

7:00 am-7:45 am

1 stop15h 45m

Rome Fiumicino

Wed 11/18

1:55 pm-8:20 pm

1 stop15h 25m

$762
Quickest round-trip

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 11/15

1:00 pm-11:55 am

1 stop13h 55m

Rome Fiumicino

Tue 12/1

1:55 pm-8:20 pm

1 stop15h 25m

$775

OntarioRome

ONT - FCO

ONTFCO

Ontario

Fri 11/13

5:00 am-7:55 am

2 stops17h 55m

Rome Fiumicino

Fri 11/27

9:55 am-10:26 pm

2 stops21h 31m

$780

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 9/13

7:00 am-2:25 pm

2 stops22h 25m

Rome Fiumicino

Tue 10/6

6:30 am-10:43 pm

2 stops25h 13m

$791

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 10/6

5:00 am-7:35 am

2 stops17h 35m

Rome Fiumicino

Tue 10/13

6:50 am-5:41 pm

2 stops19h 51m

$791

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 9/21

1:56 pm-1:40 pm

1 stop14h 44m

Rome Fiumicino

Thu 10/1

9:45 am-10:49 pm

1 stop22h 04m

$886

OntarioRome

ONT - FCO

ONTFCO

Ontario

Fri 8/21

7:00 am-7:55 am

1 stop15h 55m

Rome Fiumicino

Sun 9/6

9:45 am-10:35 pm

1 stop21h 50m

$907

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 8/2

10:00 pm-7:35 am

1 stop24h 35m

Rome Fiumicino

Fri 8/14

9:45 am-9:52 pm

1 stop21h 07m

$929

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 8/1

1:50 pm-11:45 am

2 stops36h 55m

Rome Fiumicino

Mon 8/10

6:50 am-10:51 pm

2 stops25h 01m

$984

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 8/2

6:00 am-9:15 am

2 stops42h 15m

Rome Fiumicino

Sun 8/16

6:50 am-10:35 pm

2 stops24h 45m

$984

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/5

Showing 1-10 of 23 resultsSorted by cheapest first
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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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
BusinessClassPrice Accuracy3 starsTrust Score*3 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

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 June 10, 2026.
Read reviews from past customers who have flown Delta,United Airlines, andBritish Airways 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
8,395 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Comfort

7.8

Crew

8.5

Food

7.2

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
8,395 reviews
Delta
7.9
Good
8,395 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Comfort

7.8

Crew

8.5

Food

7.2

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
9,804 reviews
Delta
7.9
Good
8,395 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Comfort

7.8

Crew

8.5

Food

7.2

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
8,035 reviews
Delta
7.9
Good
8,395 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Comfort

7.8

Crew

8.5

Food

7.2

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. 3 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 15h 45m. Fly via United Airlines or Delta 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 United Airlines - these airlines can fly you to your destination from $487 and $508, respectively. Delta is priced at 40% 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.

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
Civitavecchia
Montepulciano
Santa Marinella

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Ontario to Leonardo da Vinci/Fiumicino

Discover the top 3 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 June 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$479Average$843FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$487Average$613FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$508Average$776FlexibilityNo cancel feeOn-time69%

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