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$581+ 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 6/21. Fares are subject to change and may not be available on all flights or dates of travel.
FCO — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$616
(lol.travel)

One-way from

$581
(Kiwi.com)

Popular in

July

Cheapest in

May

Average price

$754
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. 12% potential increase in price ($104 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This lol.travel deal was found by Cheapflights users on 6/10. 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.
Mon 11/1011:00 amFCO - ONT
1 stop21h 45mBritish Airways
Mon 11/1711:00 amONT - FCO
2 stops18h 40mBritish Airways
Deal found 6/10$608
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Thu 9/410:00 amFCO - ONT
1 stop17h 54mAmerican Airlines
Sun 9/78:15 amONT - FCO
1 stop14h 50mAmerican Airlines
Deal found 6/11$628
This Iberia deal was found by Cheapflights users on 6/12. 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.
Fri 11/711:00 amFCO - ONT
1 stop21h 45mIberia
Thu 11/138:46 amONT - FCO
1 stop16h 59mIberia
Deal found 6/12$630
This KLM deal was found by Cheapflights users on 6/10. 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.
Thu 6/1911:35 amFCO - ONT
1 stop17h 19mKLM
Sat 7/57:05 amONT - FCO
1 stop15h 30mKLM
Deal found 6/10$636
This lol.travel deal was found by Cheapflights users on 6/11. 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 7/102:20 pmFCO - ONT
1 stop15h 34mUnited Airlines
Thu 7/241:34 pmONT - FCO
1 stop13h 46mUnited Airlines
Deal found 6/11$704
This Air Canada deal was found by Cheapflights users on 6/10. 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.
Thu 9/411:30 amFCO - ONT
2 stops18h 13mMultiple Airlines
Tue 9/237:00 amONT - FCO
2 stops17h 15mMultiple Airlines
Deal found 6/10$712
This Delta deal was found by Cheapflights users on 6/10. 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.
Fri 7/256:05 amFCO - ONT
2 stops25h 42mDelta
Fri 8/12:14 pmONT - FCO
2 stops19h 51mDelta
Deal found 6/10$757
This Air Canada deal was found by Cheapflights users on 6/10. 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.
Sun 6/2911:30 amFCO - ONT
2 stops18h 24mAir Canada
Sat 7/55:05 amONT - FCO
2 stops19h 10mAir Canada
Deal found 6/10$1,351

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 June 12, 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

Mon 11/10

11:00 am-11:45 pm

1 stop21h 45m

Ontario

Mon 11/17

11:00 am-2:40 pm

2 stops18h 40m

$608

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 9/4

10:00 am-6:54 pm

1 stop17h 54m

Ontario

Sun 9/7

8:15 am-8:05 am

1 stop14h 50m

$628

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Fri 11/7

11:00 am-11:45 pm

1 stop21h 45m

Ontario

Thu 11/13

8:46 am-10:45 am

1 stop16h 59m

$630

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Mon 11/10

10:15 am-7:42 pm

1 stop18h 27m

Ontario

Mon 11/17

7:00 am-10:30 am

1 stop18h 30m

$636

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 7/10

2:20 pm-8:54 pm

1 stop15h 34m

Ontario

Thu 7/24

1:34 pm-12:20 pm

1 stop13h 46m

$704

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 9/4

11:30 am-8:43 pm

2 stops18h 13m

Ontario

Tue 9/23

7:00 am-9:15 am

2 stops17h 15m

$712

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Fri 7/25

6:05 am-10:47 pm

2 stops25h 42m

Ontario

Fri 8/1

2:14 pm-7:05 pm

2 stops19h 51m

$757

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 8/7

11:30 am-8:54 pm

2 stops18h 24m

Ontario

Thu 8/14

5:05 am-9:15 am

2 stops19h 10m

$1,178

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Sat 6/21

2:15 pm-4:18 pm

2 stops35h 03m

$581

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

Thu 7/24

10:00 am-6:53 pm

1 stop17h 53m

$754

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 16 results
1
2

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 $328). 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 June 12, 2025.
Read through reviews of airlines operating flights from Rome to Ontario, such as Delta, KLM and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air Canada
7.1
Good
9,531 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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, British Airways ($616), American Airlines ($628), and KLM ($636) 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?

    $754 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 Iberia and American Airlines, with prices starting from $755 and $759, 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 $328). 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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