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Leonardo da Vinci/Fiumicino

$348+ 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
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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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 September 15, 2025.

Round-trip from

$467
(Delta)

One-way from

$348
(Kiwi.com)

Popular in

June

Cheapest in

December

Average price

$701
From Ontario to Rome Fiumicino
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One-way flight from Ontario to Rome Fiumicino
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Highest demand for flights based on searches. 26% potential increase in price ($315 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($72 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 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 September 15, 2025.

This Delta deal was found by Cheapflights users on 9/15. 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.
Sun 12/77:05 amONT - FCO
1 stop15h 50mDelta
Tue 12/2310:05 amFCO - ONT
1 stop21h 54mDelta
Deal found 9/15$467
This Delta deal was found by Cheapflights users on 9/15. 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.
Tue 11/2510:25 pmONT - FCO
1 stop24h 30mDelta
Thu 12/412:40 pmFCO - ONT
1 stop19h 23mDelta
Deal found 9/15$475
This lol.travel deal was found by Cheapflights users on 9/14. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/199:36 amONT - FCO
1 stop18h 44mUnited Airlines
Tue 11/47:00 amFCO - ONT
2 stops19h 34mUnited Airlines
Deal found 9/14$483
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Sun 12/75:05 amONT - FCO
2 stops41h 40mUnited Airlines
Wed 12/1712:45 pmFCO - ONT
2 stops42h 40mUnited Airlines
Deal found 9/14$488
This Expedia deal was found by Cheapflights users on 9/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/257:00 amONT - FCO
2 stops19h 10mIberia
Wed 12/38:20 pmFCO - ONT
2 stops34h 59mIberia
Deal found 9/15$489
This oojo deal was found by Cheapflights users on 9/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/94:47 pmONT - FCO
2 stops18h 08mBritish Airways
Thu 11/207:40 amFCO - ONT
2 stops23h 43mBritish Airways
Deal found 9/15$493
This Delta deal was found by Cheapflights users on 9/15. 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.
Sun 11/2310:25 pmONT - FCO
2 stops36h 20mDelta
Thu 12/412:40 pmFCO - ONT
1 stop19h 23mDelta
Deal found 9/15$494
This Delta deal was found by Cheapflights users on 9/15. 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.
Tue 11/2510:25 pmONT - FCO
1 stop24h 30mDelta
Wed 12/36:00 amFCO - ONT
2 stops25h 47mDelta
Deal found 9/15$496
This Delta deal was found by Cheapflights users on 9/15. 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.
Tue 11/2510:25 pmONT - FCO
1 stop24h 30mDelta
Tue 12/212:45 pmFCO - ONT
2 stops43h 02mDelta
Deal found 9/15$498
This KLM deal was found by Cheapflights users on 9/15. 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.
Tue 11/2511:45 amONT - FCO
1 stop35h 10mKLM
Wed 12/36:10 amFCO - ONT
2 stops19h 58mKLM
Deal found 9/15$505
This lol.travel deal was found by Cheapflights users on 9/15. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/231:53 pmONT - FCO
1 stop14h 27mUnited Airlines
Thu 11/67:05 amFCO - ONT
2 stops22h 39mUnited Airlines
Deal found 9/15$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 September 15, 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

Tue 11/25

10:25 pm-7:55 am

1 stop24h 30m

Rome Fiumicino

Thu 12/4

12:40 pm-11:03 pm

1 stop19h 23m

$475

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 2/21

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Tue 3/3

12:40 pm-9:14 pm

1 stop17h 34m

$481

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 2/24

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Tue 3/3

12:40 pm-9:14 pm

1 stop17h 34m

$481

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 11/24

6:00 am-11:45 am

2 stops20h 45m

Rome Fiumicino

Thu 12/4

12:40 pm-11:03 pm

1 stop19h 23m

$494

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 11/25

10:25 pm-7:55 am

1 stop24h 30m

Rome Fiumicino

Tue 12/2

12:45 pm-10:47 pm

2 stops43h 02m

$498

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 11/25

11:45 am-7:55 am

1 stop35h 10m

Rome Fiumicino

Wed 12/3

6:10 am-5:08 pm

2 stops19h 58m

$505

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 11/24

6:00 am-11:45 am

2 stops20h 45m

Rome Fiumicino

Wed 12/3

6:00 am-10:47 pm

2 stops25h 47m

$515

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 11/15

7:00 am-7:55 am

2 stops39h 55m

Rome Fiumicino

Thu 11/27

9:40 am-12:37 pm

2 stops35h 57m

$519

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 11/16

7:00 am-7:45 am

1 stop15h 45m

Rome Fiumicino

Mon 11/24

1:30 pm-10:51 pm

2 stops42h 21m

$529

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 11/12

6:38 pm-11:00 pm

2 stops19h 22m

Rome Fiumicino

Fri 11/21

1:35 pm-10:51 pm

2 stops18h 16m

$532

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 22 results
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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, January is the cheapest month in which you can book a flight from Ontario to Rome Fiumicino Airport (average of $644). Flying from Ontario to Rome Fiumicino Airport in June is currently the most expensive (average of $1,133). 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 September 15, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 27% 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 September 15, 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
8.0
Very good
7,954 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

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
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

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
7.8
Good
1,385 reviews
Delta
8.0
Very good
7,954 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

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
8,929 reviews
Delta
8.0
Very good
7,954 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

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
7,361 reviews
Delta
8.0
Very good
7,954 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

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 24h 30m. 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 KLM - these airlines can fly you to your destination from $514 and $538, 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, January is the cheapest month in which you can book a flight from Ontario to Rome Fiumicino Airport (average of $644). Flying from Ontario to Rome Fiumicino Airport in June is currently the most expensive (average of $1,133). 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

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Alternative routes for Ontario to Leonardo da Vinci/Fiumicino

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$479Average$591FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$514Average$613FlexibilityNo cancel feeOn-time70%
KLMCheapest$538Average$717FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$569Average$796FlexibilityNo cancel feeOn-time69%

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