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$379+ Cheap flights from Ontario (ONT) to Rome (ROM)

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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ROM
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Ontario to Rome

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Rome (ROM). 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 16, 2025.

Round-trip from

$456
(British Airways)

One-way from

$379
(British Airways)

Popular in

May

Cheapest in

December

Average price

$826
From Ontario to Rome (ROM)
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One-way flight from Ontario to Rome (ROM)
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Highest demand for flights based on searches. 17% potential increase in price ($158 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 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 Rome

Cheapest flights from Ontario to Rome
Explore the most affordable flight options available from Ontario to Rome. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1811:59 pmONT - FCO
1 stop23h 06mBritish Airways
Fri 12/51:00 pmFCO - ONT
1 stop18h 28mBritish Airways
Deal found 9/15$456
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 lol.travel deal was found by Cheapflights users on 9/16. 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 10/239:36 amONT - FCO
1 stop18h 44mUnited Airlines
Thu 11/67:05 amFCO - ONT
2 stops22h 39mUnited Airlines
Deal found 9/16$503
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

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Rome 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 16, 2025.
Use the filters below to find and compare flights from Ontario to Rome that are best for you.

Fly from

Ontario

Fly to

Rome

Route

Depart

Return

Price

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 10/18

11:59 pm-8:05 am

1 stop23h 06m

Rome Fiumicino

Thu 12/4

1:00 pm-11:55 pm

1 stop19h 55m

$456

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

Thu 12/4

6:00 am-11:59 pm

2 stops26h 59m

$496

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

Sun 12/7

6:00 am-7:55 am

3 stops40h 55m

Rome Fiumicino

Wed 12/17

12:45 pm-10:25 pm

2 stops42h 40m

$503

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

Tue 11/11

7:00 am-7:45 am

1 stop15h 45m

Rome Fiumicino

Tue 11/25

9:45 am-10:31 pm

1 stop21h 46m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 10/18

6:36 pm-1:20 pm

1 stop33h 44m

Rome Fiumicino

Wed 12/3

7:05 am-12:17 pm

2 stops38h 12m

$510

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 11/17

7:00 am-10:55 am

2 stops18h 55m

Rome Fiumicino

Wed 11/26

10:30 am-10:31 pm

2 stops21h 01m

$511

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

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 22 results
1
2
3

Best time to book a flight from Ontario to Rome

Have a flexible travel schedule? Discover the best time to fly to Rome 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

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

Currently, January is the cheapest month in which you can book a flight from Ontario to Rome (average of $644). Flying from Ontario to Rome 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 ROM?

Find hourly flight availability from Ontario to Rome. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

It’s optimal to fly from Ontario to Rome in the evening. By choosing this option you can save up to 38% on the cost of your flight, compared to a flight in the morning.

How much does it cost to fly round-trip from Ontario to Rome?

Reviews of airlines servicing Rome

Get insights into the airlines that provide service to Rome. 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 Rome. Reviews last updated September 16, 2025.
Get a feel of what it's like to fly with Delta, KLM, and United Airlines from Ontario to Rome by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,957 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

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
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

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
1,386 reviews
Delta
8.0
Very good
7,957 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

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
8,924 reviews
Delta
8.0
Very good
7,957 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

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
7,363 reviews
Delta
8.0
Very good
7,957 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

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 Rome. 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?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Rome. 4 airlines have flights from Ontario to Rome on a regular basis. Booking flights from Ontario to Rome should not be difficult; the airport handles an average of 0 outbound flights to Rome per day.

  • How long is the flight from Ontario to Rome?

    Departing from Ontario to Rome will take you 20h 45m. Ontario and Rome are separated by a distance of 6303 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Our cheapest airline available from Ontario to Rome is Delta. Our recent data shows that you can find tickets from as low as $479 on this airline. Additional options worth looking into are British Airways and KLM, starting at $514 and $538 round-trip. Delta is 36% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Ontario to Rome that include hotel bookings?

    Yes. In addition to deals on Ontario to Rome flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Rome?

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

  • Can I find deals for business class flights from Ontario to Rome?

    Yes. Cheapflights offers flight deals from Ontario to Rome 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?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Rome (average of $644). Flying from Ontario to Rome 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?

Book flights to Rome if you plan to visit one of these locations
Fiumicino
Gaeta
Montepulciano
Santa Marinella

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Alternative routes for Ontario to Rome

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 Rome

Discover the top 4 airlines that operate flights from Ontario to Rome. 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 16, 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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