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$346+ 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ROM
Jul 16 — Jul 231
Thu 7/16
Thu 7/23
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 June 16, 2026.

This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/37:05 am
ONT
-
FCO
1 stop18h 45m
Delta
Wed 8/196:30 am
FCO
-
ONT
2 stops18h 54m
Delta
Deal found 6/12$718
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:05 am
ONT
-
FCO
1 stop15h 30m
KLM
Thu 8/201:10 pm
FCO
-
ONT
1 stop17h 42m
KLM
Deal found 6/12$727
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:00 am
ONT
-
FCO
1 stop21h 05m
British Airways
Wed 9/91:10 pm
FCO
-
ONT
1 stop18h 27m
British Airways
Deal found 6/11$749
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.
Mon 8/1712:59 pm
ONT
-
FCO
2 stops18h 01m
American Airlines
Wed 9/91:10 pm
FCO
-
ONT
1 stop18h 27m
American Airlines
Deal found 6/11$753
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/61:00 pm
ONT
-
FCO
2 stops25h 00m
United Airlines
Thu 12/1011:15 am
FCO
-
ONT
2 stops42h 05m
United Airlines
Deal found 6/11$754
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1712:33 pm
ONT
-
FCO
1 stop14h 32m
British Airways
Tue 8/251:10 pm
FCO
-
ONT
1 stop18h 49m
British Airways
Deal found 6/12$755
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:00 am
ONT
-
FCO
2 stops23h 25m
Delta
Wed 9/96:30 am
FCO
-
ONT
2 stops18h 44m
Delta
Deal found 6/11$760
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/81:00 pm
ONT
-
FCO
1 stop13h 55m
United Airlines
Tue 11/101:55 pm
FCO
-
ONT
1 stop15h 25m
United Airlines
Deal found 6/15$762
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/16:53 pm
ONT
-
FCO
2 stops28h 37m
United Airlines
Fri 12/47:05 am
FCO
-
ONT
2 stops22h 15m
United Airlines
Deal found 6/15$765
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:05 am
ONT
-
FCO
1 stop15h 30m
KLM
Thu 8/201:10 pm
FCO
-
ONT
1 stop17h 42m
KLM
Deal found 6/12$767
This Air France 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:05 am
ONT
-
FCO
1 stop15h 30m
Multiple Airlines
Fri 8/211:10 pm
FCO
-
ONT
1 stop17h 42m
Multiple Airlines
Deal found 6/12$768

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 June 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$718
(KLM)

One-way from

$346
(United Airlines)

Popular in

December

Cheapest in

November

Average price

$1,181
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
High demand for flights, 4% potential price rise
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
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 June 16, 2026.
Use the filters below to find and compare flights from Ontario to Rome that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 8/10

12:33 pm-12:05 pm

1 stop14h 32m

Rome Fiumicino

Wed 8/26

1:10 pm-10:59 pm

1 stop18h 49m

$791

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 8/5

12:04 pm-1:15 pm

1 stop16h 11m

Rome Fiumicino

Thu 8/20

3:15 pm-11:24 pm

1 stop17h 09m

$797

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 10/5

7:00 am-1:15 pm

2 stops21h 15m

Rome Fiumicino

Wed 10/14

11:00 am-10:49 pm

2 stops20h 49m

$891

OntarioRome

ONT - FCO

ONTFCO

Ontario

Thu 8/20

7:00 am-7:55 am

1 stop15h 55m

Rome Fiumicino

Thu 9/10

3:40 pm-10:59 pm

1 stop16h 19m

$906

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 8/29

7:05 am-7:35 am

1 stop15h 30m

Rome Fiumicino

Tue 9/8

9:45 am-6:01 pm

1 stop17h 16m

$912
Quickest round-trip

OntarioRome

ONT - FCO

ONTFCO

Ontario

Thu 11/19

1:00 pm-11:55 am

1 stop13h 55m

Rome Fiumicino

Mon 11/30

1:55 pm-8:20 pm

1 stop15h 25m

$924

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 10/7

11:10 am-1:40 pm

1 stop17h 30m

Rome Fiumicino

Sat 10/24

3:40 pm-10:59 pm

1 stop16h 19m

$936

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 7/21

1:50 pm-1:40 pm

1 stop14h 50m

Rome Fiumicino

Wed 8/12

2:20 pm-8:53 pm

1 stop15h 33m

$978

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 7/8

1:50 pm-1:40 pm

1 stop14h 50m

Rome Fiumicino

Wed 8/5

2:20 pm-8:42 pm

1 stop15h 22m

$978

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 7/8

1:50 pm-1:40 pm

1 stop14h 50m

Rome Fiumicino

Wed 7/15

3:40 pm-10:37 pm

1 stop15h 57m

$978

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/13

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice 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 Ontario-Rome flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Rome flight deals on Cheapflights vs. FlightHub >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 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 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

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 June 16, 2026.
Get a feel of what it's like to fly with 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.
United Airlines
7.4
Good
9,845 reviews

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,845 reviews
United Airlines
7.4
Good
9,845 reviews

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
British Airways
6.7
Okay
8,054 reviews
United Airlines
7.4
Good
9,845 reviews

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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. 3 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 14h 32m. 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 44% 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.

See more FAQs

Traveling to a place near Rome?

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

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Top 3 airlines flying from Ontario to Rome

Discover the top 3 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 June 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$479Average$843FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$487Average$613FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$508Average$776FlexibilityNo cancel feeOn-time69%

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