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$226+ 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ROM
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap 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 December 4, 2025.

This Delta deal was found by Cheapflights users on 12/3. 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.
Wed 12/107:05 amONT - FCO
1 stop15h 50mDelta
Wed 12/179:20 amFCO - ONT
2 stops22h 44mDelta
Deal found 12/3$461
This KLM deal was found by Cheapflights users on 12/3. 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.
Wed 12/37:05 amONT - FCO
1 stop15h 50mKLM
Wed 12/1012:40 pmFCO - ONT
1 stop19h 24mKLM
Deal found 12/3$506
This United Airlines deal was found by Cheapflights users on 12/4. 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 12/91:50 pmONT - FCO
2 stops24h 10mUnited Airlines
Tue 12/161:30 pmFCO - ONT
2 stops31h 47mUnited Airlines
Deal found 12/4$509
This Finnair deal was found by Cheapflights users on 12/4. 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.
Tue 12/96:00 amONT - FCO
2 stops18h 00mMultiple Airlines
Wed 12/1711:00 amFCO - ONT
2 stops20h 28mMultiple Airlines
Deal found 12/4$511
This Delta deal was found by Cheapflights users on 12/4. 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 12/710:25 pmONT - FCO
1 stop24h 30mDelta
Tue 12/166:00 amFCO - ONT
2 stops20h 07mDelta
Deal found 12/4$513
This Delta deal was found by Cheapflights users on 12/4. 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 12/710:25 pmONT - FCO
1 stop24h 30mDelta
Mon 12/159:55 amFCO - ONT
2 stops40h 12mDelta
Deal found 12/4$525
This Delta deal was found by Cheapflights users on 12/4. 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 12/64:49 pmONT - FCO
2 stops33h 56mDelta
Mon 12/159:55 amFCO - ONT
2 stops40h 12mDelta
Deal found 12/4$529
This KLM deal was found by Cheapflights users on 12/4. 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 12/57:05 amONT - FCO
1 stop15h 50mKLM
Fri 12/1212:40 pmFCO - ONT
1 stop19h 24mKLM
Deal found 12/4$556
This United Airlines deal was found by Cheapflights users on 12/4. 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.
Thu 12/46:00 amONT - FCO
2 stops16h 45mUnited Airlines
Thu 12/117:05 amFCO - ONT
2 stops19h 32mUnited Airlines
Deal found 12/4$557
This United Airlines deal was found by Cheapflights users on 12/4. 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.
Sat 12/66:41 pmONT - FCO
2 stops19h 19mUnited Airlines
Tue 12/169:45 amFCO - ONT
2 stops35h 32mUnited Airlines
Deal found 12/4$559
This Delta deal was found by Cheapflights users on 12/4. 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 12/64:49 pmONT - FCO
2 stops33h 56mDelta
Sun 12/1410:05 amFCO - ONT
1 stop21h 59mDelta
Deal found 12/4$560

Find 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 December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$457
(oojo)

One-way from

$226
(oojo)

Popular in

May

Cheapest in

December

Average price

$508
Provider with most accurate pricing for Ontario-Rome (ROM) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Rome (ROM) flights.
Search Deals
From Ontario to Rome (ROM)
Search Deals
One-way flight from Ontario to Rome (ROM)
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($158 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 4, 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

Wed 2/25

10:20 pm-10:30 am

1 stop27h 10m

Rome Fiumicino

Tue 3/3

12:40 pm-12:02 pm

1 stop32h 22m

$492

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 2/25

1:45 pm-7:45 am

2 stops57h 00m

Rome Fiumicino

Thu 3/5

11:15 am-12:48 pm

2 stops58h 33m

$494

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 2/25

10:20 pm-10:30 am

1 stop27h 10m

Rome Fiumicino

Thu 3/5

5:15 pm-4:02 pm

2 stops31h 47m

$512

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 1/10

6:32 pm-11:00 pm

2 stops19h 28m

Rome Fiumicino

Sun 1/18

12:20 pm-10:53 pm

2 stops19h 33m

$513

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 4/29

6:43 am-12:05 pm

1 stop20h 22m

Rome Fiumicino

Thu 5/7

1:25 pm-11:40 pm

1 stop19h 15m

$516

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 3/29

10:30 pm-10:00 am

1 stop26h 30m

Rome Fiumicino

Wed 4/8

9:45 am-9:04 pm

1 stop20h 19m

$522

OntarioRome

ONT - FCO

ONTFCO

Ontario

Thu 1/8

1:24 pm-5:50 pm

2 stops19h 26m

Rome Fiumicino

Thu 1/22

7:05 am-5:43 pm

2 stops19h 38m

$522

OntarioRome

ONT - FCO

ONTFCO

Ontario

Thu 3/26

10:56 am-10:35 am

1 stop15h 39m

Rome Fiumicino

Fri 4/3

1:10 pm-9:24 pm

1 stop17h 14m

$576

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 3/28

10:30 pm-7:35 am

1 stop24h 05m

Rome Fiumicino

Thu 4/9

9:45 am-9:04 pm

1 stop20h 19m

$614

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 12/29

1:40 pm-11:00 am

2 stops36h 20m

Rome Fiumicino

Mon 1/12

1:30 pm-8:58 pm

2 stops40h 28m

$820

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 23 results
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Compare providers for flights from Ontario to Rome

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 Ontario to Rome in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 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 Ontario-Rome flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Rome flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Rome flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Rome flights, Cheapflights users trust eDreams the most. eDreams 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 Ontario-Rome 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 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, April is the cheapest month in which you can book a flight from Ontario to Rome (average of $375). Flying from Ontario to Rome in June is currently the most expensive (average of $598). 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 December 4, 2025.

It’s optimal to fly from Ontario to Rome in the afternoon. By choosing this option you can save up to 26% on the cost of your flight, compared to a flight in the morning.

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 December 4, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and British Airways 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
7.9
Good
8,009 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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
7.9
Good
8,009 reviews
Delta
7.9
Good
8,009 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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
9,066 reviews
Delta
7.9
Good
8,009 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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
7,560 reviews
Delta
7.9
Good
8,009 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.3

Entertainment

7.9

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 27h 10m. 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 United Airlines, starting at $487 and $508 round-trip. Delta is 35% 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, April is the cheapest month in which you can book a flight from Ontario to Rome (average of $375). Flying from Ontario to Rome in June is currently the most expensive (average of $598). 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
Montepulciano
Santa Marinella

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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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$479Average$590FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$487Average$604FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$508Average$776FlexibilityNo cancel feeOn-time69%
KLMCheapest$520Average$704FlexibilityNo cancel feeOn-time75%

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