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$638+ Cheap flights from Fiumicino (FCO) to Ontario (ONT)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
FCO — ONT
ago. 3 — ago. 101
dom. 8/3
dom. 8/10
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 julio 29, 2025.

Round-trip from

$638
(American Airlines)

Popular in

July

Cheapest in

May

Average price

$869
From Rome Fiumicino to Ontario
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Highest demand for flights based on searches. 9% potential increase in price ($80 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 29, 2025.

This American Airlines deal was found by Cheapflights users on 7/28. 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.
mié. 8/131:25 pmFCO - ONT
2 stops29h 34mAmerican Airlines
dom. 8/176:17 amONT - FCO
2 stops18h 33mAmerican Airlines
Deal found 7/28$638
This lol.travel deal was found by Cheapflights users on 7/28. 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.
mié. 8/132:20 pmFCO - ONT
1 stop31h 12mUnited Airlines
dom. 8/171:34 pmONT - FCO
1 stop13h 46mUnited Airlines
Deal found 7/28$653
This Finnair deal was found by Cheapflights users on 7/29. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/131:00 pmFCO - ONT
1 stop17h 58mMultiple Airlines
lun. 12/2911:00 amONT - FCO
1 stop14h 35mMultiple Airlines
Deal found 7/29$666
This ResecentrumGruppen deal was found by Cheapflights users on 7/28. 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 ResecentrumGruppen is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/1111:35 amFCO - ONT
1 stop19h 48mKLM
sáb. 9/277:05 amONT - FCO
1 stop15h 30mKLM
Deal found 7/28$672
This British Airways deal was found by Cheapflights users on 7/29. 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.
vie. 12/191:10 pmFCO - ONT
2 stops19h 38mBritish Airways
vie. 1/211:59 pmONT - FCO
1 stop25h 36mBritish Airways
Deal found 7/29$676
This Iberia deal was found by Cheapflights users on 7/28. 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.
jue. 9/410:00 amFCO - ONT
1 stop21h 33mIberia
sáb. 9/138:15 amONT - FCO
1 stop14h 50mIberia
Deal found 7/28$739
This Delta deal was found by Cheapflights users on 7/29. 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.
jue. 9/119:45 amFCO - ONT
1 stop18h 30mDelta
sáb. 9/277:05 amONT - FCO
1 stop15h 30mDelta
Deal found 7/29$789

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 julio 29, 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

mié. 8/13

1:25 pm-9:59 am

2 stops29h 34m

Ontario

dom. 8/17

6:17 am-9:50 am

2 stops18h 33m

$638

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

mié. 8/13

2:20 pm-12:32 pm

1 stop31h 12m

Ontario

dom. 8/17

1:34 pm-12:20 pm

1 stop13h 46m

$653

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

jue. 9/11

11:35 am-10:23 pm

1 stop19h 48m

Ontario

sáb. 9/27

7:05 am-7:35 am

1 stop15h 30m

$672

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

vie. 12/19

1:10 pm-11:48 pm

2 stops19h 38m

Ontario

vie. 1/2

11:59 pm-10:35 am

1 stop25h 36m

$676

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

jue. 9/11

11:30 am-8:43 pm

2 stops18h 13m

Ontario

mar. 9/23

7:00 am-9:15 am

2 stops17h 15m

$712

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

jue. 9/4

10:00 am-10:33 pm

1 stop21h 33m

Ontario

sáb. 9/13

8:15 am-8:05 am

1 stop14h 50m

$739

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

jue. 9/11

9:45 am-7:15 pm

1 stop18h 30m

Ontario

sáb. 9/27

7:05 am-7:35 am

1 stop15h 30m

$789

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

mar. 9/2

10:00 am-6:24 pm

1 stop17h 24m

$768

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

jue. 11/20

11:35 am-10:23 pm

1 stop19h 48m

$770

RomeOntario

FCO - ONT

FCOONT

Rome Fiumicino

jue. 11/6

11:35 am-11:57 pm

1 stop21h 22m

$773

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 11 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.

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 julio 29, 2025.
Read reviews from past customers who have flown Delta, KLM, and United Airlines from Rome Fiumicino Airport to Ontario. 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
7,977 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

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
7,977 reviews
Delta
8.0
Very good
7,977 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

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
1,383 reviews
Delta
8.0
Very good
7,977 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

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
8,899 reviews
Delta
8.0
Very good
7,977 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

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
7,977 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

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
Iberia
7.0
Good
2,858 reviews
Delta
8.0
Very good
7,977 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

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 to fly from Rome Fiumicino Airport to Ontario one-way?

    $768 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 American Airlines and Iberia, with prices starting from $770 and $773, 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.

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