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Leonardo da Vinci/Fiumicino

$388+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — FCO
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 August 14, 2025.

Round-trip from

$487
(Billigflug)

One-way from

$388
(KLM)

Popular in

June

Cheapest in

February

Average price

$852
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. 20% potential increase in price ($252 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($73 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 14, 2025.

This Billigflug deal was found by Cheapflights users on 8/14. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:00 amONT - FCO
1 stop18h 30mAir France
Wed 11/2610:05 amFCO - ONT
1 stop18h 37mAir France
Deal found 8/14$489
This Iberia deal was found by Cheapflights users on 8/12. 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.
Mon 10/2710:57 amONT - FCO
2 stops20h 33mIberia
Thu 11/1311:35 amFCO - ONT
1 stop19h 48mIberia
Deal found 8/12$500
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Wed 11/125:05 amONT - FCO
2 stops18h 50mUnited Airlines
Wed 11/269:45 amFCO - ONT
1 stop21h 46mUnited Airlines
Deal found 8/14$506
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Tue 11/117:00 amONT - FCO
1 stop15h 45mUnited Airlines
Tue 11/187:05 amFCO - ONT
2 stops20h 31mUnited Airlines
Deal found 8/14$509
This Iberia deal was found by Cheapflights users on 8/14. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/258:14 amONT - FCO
1 stop14h 51mIberia
Fri 11/2111:35 amFCO - ONT
1 stop21h 22mIberia
Deal found 8/14$511
This British Airways deal was found by Cheapflights users on 8/12. 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.
Wed 8/208:14 amONT - FCO
2 stops21h 11mBritish Airways
Wed 8/2710:00 amFCO - ONT
1 stop17h 24mBritish Airways
Deal found 8/12$521
This Iberia deal was found by Cheapflights users on 8/14. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/258:14 amONT - FCO
1 stop14h 51mIberia
Fri 9/127:35 amFCO - ONT
2 stops20h 19mIberia
Deal found 8/14$524
This lol.travel deal was found by Cheapflights users on 8/13. 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.
Sat 8/166:31 pmONT - FCO
1 stop32h 49mUnited Airlines
Fri 8/292:20 pmFCO - ONT
1 stop15h 23mUnited Airlines
Deal found 8/13$528
This oojo deal was found by Cheapflights users on 8/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1912:22 pmONT - FCO
2 stops22h 33mBritish Airways
Tue 8/2610:00 amFCO - ONT
1 stop17h 24mBritish Airways
Deal found 8/14$530
This United Airlines deal was found by Cheapflights users on 8/12. 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 8/131:34 pmONT - FCO
1 stop13h 46mUnited Airlines
Wed 8/209:45 amFCO - ONT
1 stop21h 45mUnited Airlines
Deal found 8/12$536

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 August 14, 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 1/13

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Tue 1/27

12:40 pm-11:38 am

1 stop31h 58m

$487

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 11/12

5:05 am-8:55 am

2 stops18h 50m

Rome Fiumicino

Wed 11/26

9:45 am-10:31 pm

1 stop21h 46m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 11/9

5:05 am-8:55 am

2 stops18h 50m

Rome Fiumicino

Wed 11/19

9:45 am-10:31 pm

1 stop21h 46m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 2/10

5:40 am-9:25 am

2 stops18h 45m

Rome Fiumicino

Tue 2/24

9:45 am-10:26 pm

1 stop21h 41m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 1/12

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Tue 1/20

12:40 pm-11:38 am

1 stop31h 58m

$508

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 1/12

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Thu 1/22

12:40 pm-11:38 am

1 stop31h 58m

$508

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 1/11

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Fri 1/23

12:40 pm-11:38 am

1 stop31h 58m

$508

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 1/11

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Wed 1/21

12:40 pm-11:38 am

1 stop31h 58m

$508

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 1/13

10:30 pm-10:30 am

1 stop27h 00m

Rome Fiumicino

Fri 1/23

12:40 pm-11:38 am

1 stop31h 58m

$508

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 10/20

11:36 am-11:05 am

1 stop14h 29m

$388

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 15 results
1
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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 $1,135). 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 August 14, 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.

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 August 14, 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
7,980 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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
1,381 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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
7,266 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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. 5 airlines have flights to Rome Fiumicino from Ontario on a regular basis.

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

    Currently priced at $514, British Airways will fly you from Ontario to Rome Fiumicino Airport and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and KLM - these airlines can fly you to your destination from $519 and $520, respectively. British Airways is priced at 48% 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 KLM ($388), British Airways ($398), and United Airlines ($399).

  • 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 $1,135). 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
Ciampino
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 5 airlines flying from Ontario to Leonardo da Vinci/Fiumicino

Discover the top 5 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$514Average$738FlexibilityNo cancel feeOn-time70%
DeltaCheapest$519Average$650FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$520Average$717FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$569Average$830FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$859Average$1,288FlexibilityNo cancel feeOn-time71%

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