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$363+ 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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ROM
Apr 11 — Apr 181
Sat 4/11
Sat 4/18
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 March 12, 2026.

This United Airlines deal was found by Cheapflights users on 3/8. 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.
Wed 8/51:50 pm
ONT
-
FCO
1 stop14h 30m
United Airlines
Thu 8/2011:30 am
FCO
-
ONT
2 stops44h 28m
United Airlines
Deal found 3/8$557
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Mon 11/235:00 am
ONT
-
FCO
2 stops17h 45m
United Airlines
Fri 12/119:45 am
FCO
-
ONT
2 stops19h 35m
United Airlines
Deal found 3/8$576
This Delta deal was found by Cheapflights users on 3/8. 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 12/27:00 am
ONT
-
FCO
1 stop18h 30m
Delta
Tue 12/812:45 pm
FCO
-
ONT
2 stops36h 27m
Delta
Deal found 3/8$577
This Delta deal was found by Cheapflights users on 3/8. 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 11/306:00 am
ONT
-
FCO
2 stops20h 45m
Delta
Tue 12/812:45 pm
FCO
-
ONT
2 stops42h 58m
Delta
Deal found 3/8$581
This KLM deal was found by Cheapflights users on 3/8. 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 12/16:00 am
ONT
-
FCO
2 stops16h 55m
KLM
Thu 12/1010:05 am
FCO
-
ONT
1 stop21h 09m
KLM
Deal found 3/8$582
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Wed 12/26:00 am
ONT
-
FCO
2 stops32h 00m
United Airlines
Wed 12/91:30 pm
FCO
-
ONT
2 stops18h 36m
United Airlines
Deal found 3/8$583
This United Airlines deal was found by Cheapflights users on 3/7. 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 4/116:49 pm
ONT
-
FCO
1 stop33h 51m
United Airlines
Thu 4/2311:30 am
FCO
-
ONT
2 stops44h 01m
United Airlines
Deal found 3/7$587
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Mon 11/305:00 am
ONT
-
FCO
2 stops28h 15m
United Airlines
Fri 12/119:45 am
FCO
-
ONT
2 stops22h 21m
United Airlines
Deal found 3/8$589
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Wed 4/225:10 am
ONT
-
FCO
1 stop22h 10m
United Airlines
Tue 4/2812:25 pm
FCO
-
ONT
2 stops41h 11m
United Airlines
Deal found 3/9$592
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Mon 11/305:00 am
ONT
-
FCO
2 stops28h 15m
United Airlines
Mon 12/72:20 pm
FCO
-
ONT
2 stops36h 27m
United Airlines
Deal found 3/8$595

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 March 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$557
(United Airlines)

One-way from

$363
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$814
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. 6% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 12, 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 5/4

5:00 am-12:20 pm

1 stop22h 20m

Rome Fiumicino

Wed 5/20

3:40 pm-10:59 pm

1 stop16h 19m

$637

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 4/19

7:05 am-7:35 am

1 stop15h 30m

Rome Fiumicino

Tue 5/5

9:45 am-6:33 pm

1 stop17h 48m

$657

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 4/13

11:05 am-1:40 pm

1 stop17h 35m

Rome Fiumicino

Tue 4/21

2:20 pm-8:36 pm

1 stop15h 16m

$657

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 4/25

1:27 pm-1:40 pm

1 stop15h 13m

Rome Fiumicino

Wed 5/6

2:20 pm-8:36 pm

1 stop15h 16m

$657

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 4/6

1:27 pm-1:40 pm

1 stop15h 13m

Rome Fiumicino

Mon 4/13

2:20 pm-8:36 pm

1 stop15h 16m

$697

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 4/6

10:25 pm-11:00 am

2 stops27h 35m

Rome Fiumicino

Mon 4/13

9:00 am-11:44 pm

2 stops23h 44m

$702

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 4/13

12:19 pm-4:00 pm

2 stops18h 41m

Rome Fiumicino

Thu 4/23

11:10 am-9:59 pm

2 stops19h 49m

$737

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 5/10

7:05 am-10:50 am

1 stop18h 45m

Rome Fiumicino

Thu 6/4

6:30 am-4:17 pm

2 stops18h 47m

$835

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 3/15

11:59 pm-7:55 am

2 stops23h 56m

Rome Fiumicino

Sun 3/22

7:00 am-10:57 pm

2 stops23h 57m

$949

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sat 5/16

1:30 pm-1:20 pm

1 stop14h 50m

Rome Fiumicino

Sun 5/24

8:45 am-8:04 pm

2 stops20h 19m

$1,032

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/8

Showing 1-10 of 23 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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 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

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 $381). Flying from Ontario to Rome in June is currently the most expensive (average of $583). 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.

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 March 12, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andBritish 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
8,284 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

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
8,284 reviews
Delta
7.9
Good
8,284 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

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
9,418 reviews
Delta
7.9
Good
8,284 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

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
7,784 reviews
Delta
7.9
Good
8,284 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Boarding

8.1

Entertainment

7.8

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. 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 15h 30m. 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 $475 on this airline. Additional options worth looking into are British Airways and United Airlines, starting at $487 and $508 round-trip. Delta is 40% 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 $381). Flying from Ontario to Rome in June is currently the most expensive (average of $583). 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

Browse thousands of different options on Cheapflights for your next trip

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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 March 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$475Average$650FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$487Average$604FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$508Average$776FlexibilityNo cancel feeOn-time69%

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