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$597+ Cheap flights from Fiumicino (FCO) to Ontario (ONT)

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 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
FCO — ONT
Mar 26 — Apr 21
Wed 3/26
Wed 4/2
1 adult, Economy
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Cheap flight deals from Leonardo da Vinci/Fiumicino to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Leonardo da Vinci/Fiumicino (FCO) to Ontario (ONT). 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 March 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$663
(Iberia)

One-way from

$597
(Thrive Travel)

Popular in

July

Cheapest in

February

Average price

$688
Provider with most accurate pricing for Rome Fiumicino-Ontario flight deals.
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Provider most trusted by Cheapflights users for Rome Fiumicino-Ontario flights.
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From Rome Fiumicino to Ontario
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One-way flight from Rome Fiumicino to Ontario
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Highest demand for flights based on searches. 15% potential increase in price ($133 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Leonardo da Vinci/Fiumicino to Ontario

Cheapest flights from Leonardo da Vinci/Fiumicino to Ontario
Explore the most affordable flight options available from Leonardo da Vinci/Fiumicino to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 21, 2025.

This Iberia deal was found by Cheapflights users on 3/20. 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.
Thu 3/2711:10 amFCO - ONT
1 stop20h 44mIberia
Wed 4/97:00 amONT - FCO
1 stop16h 05mIberia
Deal found 3/20$663
This United Airlines deal was found by Cheapflights users on 3/20. 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.
Fri 4/113:40 pmFCO - ONT
1 stop16h 15mUnited Airlines
Fri 4/181:20 pmONT - FCO
1 stop15h 20mUnited Airlines
Deal found 3/20$720
This Booking.com deal was found by Cheapflights users on 3/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1810:00 amFCO - ONT
1 stop16h 32mMultiple Airlines
Wed 9/38:43 amONT - FCO
1 stop14h 22mMultiple Airlines
Deal found 3/20$739
This Delta deal was found by Cheapflights users on 3/20. 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.
Sat 4/59:45 amFCO - ONT
1 stop21h 51mDelta
Wed 4/96:00 amONT - FCO
2 stops16h 55mDelta
Deal found 3/20$750
This British Airways deal was found by Cheapflights users on 3/19. 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 4/910:00 amFCO - ONT
1 stop17h 29mBritish Airways
Wed 4/167:00 amONT - FCO
1 stop16h 05mBritish Airways
Deal found 3/19$751
This KLM deal was found by Cheapflights users on 3/20. 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.
Fri 5/239:45 amFCO - ONT
1 stop21h 42mKLM
Mon 11/177:00 amONT - FCO
1 stop18h 30mKLM
Deal found 3/20$881
This American Airlines deal was found by Cheapflights users on 3/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/510:00 amFCO - ONT
1 stop18h 01mAmerican Airlines
Mon 8/258:37 amONT - FCO
1 stop14h 28mAmerican Airlines
Deal found 3/20$1,541
This Air France deal was found by Cheapflights users on 3/20. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/182:30 pmFCO - ONT
1 stop16h 59mAir France
Wed 8/207:00 amONT - FCO
1 stop15h 35mAir France
Deal found 3/20$2,183
This oojo deal was found by Cheapflights users on 3/20. 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.
Fri 4/411:00 amFCO - ONT
1 stop40h 00mChina Airlines
Fri 4/1812:10 amONT - FCO
1 stop46h 45mChina Airlines
Deal found 3/20$8,375

Cheapflights Fare Finder

Customize your flight search to find flights from Leonardo da Vinci/Fiumicino to Ontario 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 March 21, 2025.
Use the filters below to find and compare flights from Rome Fiumicino Airport to Ontario that are best for you.

Fly from

Leonardo da Vinci/Fiumicino

Fly to

Ontario

Route

Depart

Return

Price

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Tue 4/1

10:00 am-11:54 pm

1 stop22h 54m

Ontario

Mon 4/14

7:00 am-8:05 am

1 stop16h 05m

$663

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Fri 4/11

3:40 pm-10:55 pm

1 stop16h 15m

Ontario

Fri 4/18

1:20 pm-1:40 pm

1 stop15h 20m

$720

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Mon 8/18

10:00 am-5:32 pm

1 stop16h 32m

Ontario

Wed 9/3

8:43 am-8:05 am

1 stop14h 22m

$739

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Sat 4/5

9:45 am-10:36 pm

1 stop21h 51m

Ontario

Wed 4/9

7:00 am-7:35 am

1 stop15h 35m

$750

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Wed 4/9

10:00 am-6:29 pm

1 stop17h 29m

Ontario

Wed 4/16

7:00 am-8:05 am

1 stop16h 05m

$751

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Fri 5/23

9:45 am-10:27 pm

1 stop21h 42m

Ontario

Mon 11/17

7:00 am-10:30 am

1 stop18h 30m

$881

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Tue 8/5

10:00 am-7:01 pm

1 stop18h 01m

Ontario

Mon 8/25

8:37 am-8:05 am

1 stop14h 28m

$1,541

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Mon 8/18

2:30 pm-10:29 pm

1 stop16h 59m

Ontario

Wed 8/20

7:00 am-7:35 am

1 stop15h 35m

$2,183

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Fri 4/4

11:00 am-6:00 pm

1 stop40h 00m

Ontario

Fri 4/18

12:10 am-7:55 am

1 stop46h 45m

$8,375

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 4/10

10:00 am-6:29 pm

1 stop17h 29m

$597

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

Showing 1-10 of 20 results
1
2

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

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 Leonardo da Vinci/Fiumicino to Ontario in March.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
FlightHubPrice 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 Rome Fiumicino Airport-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Rome Fiumicino Airport-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Rome Fiumicino Airport-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Rome Fiumicino Airport-Ontario 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 Rome Fiumicino Airport-Ontario 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 Leonardo da Vinci/Fiumicino to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Rome Fiumicino Airport to Ontario (average of $246). Flying from Rome Fiumicino Airport to Ontario in March is currently the most expensive (average of $324). 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated March 21, 2025.
Read through reviews of airlines operating flights from Rome to Ontario, such as China Airlines, Delta and KLM. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.2
Very good
723 reviews

Crew

8.5

Comfort

8.0

Boarding

8.3

Food

7.8

Overall

8.2

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
China Airlines
8.2
Very good
723 reviews
China Airlines
8.2
Very good
723 reviews

Crew

8.5

Comfort

8.0

Boarding

8.3

Food

7.8

Overall

8.2

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
Delta
8.0
Very good
7,895 reviews
China Airlines
8.2
Very good
723 reviews

Crew

8.5

Comfort

8.0

Boarding

8.3

Food

7.8

Overall

8.2

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
KLM
7.8
Good
1,319 reviews
China Airlines
8.2
Very good
723 reviews

Crew

8.5

Comfort

8.0

Boarding

8.3

Food

7.8

Overall

8.2

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
Air France
7.4
Good
1,422 reviews
China Airlines
8.2
Very good
723 reviews

Crew

8.5

Comfort

8.0

Boarding

8.3

Food

7.8

Overall

8.2

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
United Airlines
7.4
Good
8,605 reviews
China Airlines
8.2
Very good
723 reviews

Crew

8.5

Comfort

8.0

Boarding

8.3

Food

7.8

Overall

8.2

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence

Related info for your journey

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

    If you book a flight to Ontario from Rome Fiumicino, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario. There are 0 flights from Rome Fiumicino to Ontario per day from 0 different airlines.

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

    According to our current data, Iberia ($663), United Airlines ($720), and Delta ($750) offers the cheapest pricing from Rome Fiumicino Airport to Ontario.

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

    $597 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Delta and KLM, with prices starting from $778 and $791, respectively.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Rome Fiumicino Airport to Ontario (average of $246). Flying from Rome Fiumicino Airport to Ontario in March is currently the most expensive (average of $324). 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

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