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$378+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ROM
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 11, 2025.

Round-trip from

$456
(Finnair)

One-way from

$378
(oojo)

Popular in

May

Cheapest in

December

Average price

$1,025
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. 15% potential increase in price ($136 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 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 11, 2025.

This Finnair deal was found by Cheapflights users on 9/10. 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.
Sun 11/1610:47 amONT - FCO
1 stop14h 58mMultiple Airlines
Thu 12/41:00 pmFCO - ONT
1 stop18h 19mMultiple Airlines
Deal found 9/10$456
This oojo deal was found by Cheapflights users on 9/10. 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.
Sat 11/1512:46 pmONT - FCO
1 stop36h 59mBritish Airways
Thu 12/41:00 pmFCO - ONT
1 stop18h 19mBritish Airways
Deal found 9/10$461
This oojo deal was found by Cheapflights users on 9/10. 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 11/164:47 pmONT - FCO
2 stops18h 08mBritish Airways
Thu 12/41:00 pmFCO - ONT
1 stop19h 55mBritish Airways
Deal found 9/10$470
This Delta deal was found by Cheapflights users on 9/11. 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 12/87:05 amONT - FCO
1 stop15h 50mDelta
Wed 12/1712:40 pmFCO - ONT
1 stop19h 23mDelta
Deal found 9/11$475
This lol.travel deal was found by Cheapflights users on 9/10. 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 11/412:20 pmFCO - ONT
2 stops19h 31mUnited Airlines
Deal found 9/10$482
This oojo deal was found by Cheapflights users on 9/10. 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.
Fri 11/1410:47 amONT - FCO
1 stop14h 58mBritish Airways
Thu 12/41:00 pmFCO - ONT
1 stop18h 19mBritish Airways
Deal found 9/10$505
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/191:53 pmONT - FCO
1 stop14h 27mUnited Airlines
Thu 11/69:45 amFCO - ONT
1 stop21h 46mUnited Airlines
Deal found 9/10$506
This Delta deal was found by Cheapflights users on 9/10. 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 10/2011:36 amONT - FCO
1 stop14h 29mDelta
Tue 11/49:20 amFCO - ONT
2 stops22h 02mDelta
Deal found 9/10$511
This Delta deal was found by Cheapflights users on 9/10. 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 11/37:35 amONT - FCO
2 stops27h 10mDelta
Tue 11/116:10 amFCO - ONT
2 stops25h 45mDelta
Deal found 9/10$517
This Tripair deal was found by Cheapflights users on 9/10. 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 Tripair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/237:02 amONT - FCO
1 stop15h 53mUnited Airlines
Thu 11/67:05 amFCO - ONT
2 stops19h 29mUnited Airlines
Deal found 9/10$518

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 11, 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 12/10

10:47 am-10:35 am

1 stop14h 48m

Rome Fiumicino

Wed 12/24

1:00 pm-10:14 pm

1 stop18h 14m

$456

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 2/25

7:00 am-7:45 am

1 stop15h 45m

Rome Fiumicino

Tue 3/3

1:05 pm-8:17 pm

2 stops40h 12m

$490

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 2/23

7:00 am-7:45 am

1 stop15h 45m

Rome Fiumicino

Tue 3/10

9:45 am-10:26 pm

1 stop20h 41m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 2/23

7:00 am-7:45 am

1 stop15h 45m

Rome Fiumicino

Thu 3/5

9:45 am-10:26 pm

1 stop21h 41m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 2/22

7:00 am-7:45 am

1 stop15h 45m

Rome Fiumicino

Fri 3/6

9:45 am-10:26 pm

1 stop21h 41m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 10/22

1:53 pm-1:20 pm

1 stop14h 27m

Rome Fiumicino

Fri 11/7

9:45 am-10:31 pm

1 stop21h 46m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 2/23

7:00 am-7:45 am

1 stop15h 45m

Rome Fiumicino

Fri 3/6

9:45 am-10:26 pm

1 stop21h 41m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 2/22

7:00 am-7:45 am

1 stop15h 45m

Rome Fiumicino

Tue 3/10

9:45 am-10:26 pm

1 stop20h 41m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 2/25

7:00 am-7:45 am

1 stop15h 45m

Rome Fiumicino

Thu 3/5

9:45 am-10:26 pm

1 stop21h 41m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 2/24

7:00 am-7:45 am

1 stop15h 45m

Rome Fiumicino

Thu 3/5

9:45 am-10:26 pm

1 stop21h 41m

$506

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 23 results
1
2
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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 11, 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.

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 11, 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
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
1,385 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
7,361 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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 15h 45m. Ontario and Rome are separated by a distance of 6303 mi.

  • 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 $520 round-trip. Delta is 37% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Ontario to Rome one-way?

    For one-way options, check prices for KLM. According to our data, you can fly for as low as $388. Users have also found prices from $388 and $389 on Delta and United Airlines, respectively.

  • 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

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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 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$479Average$591FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$514Average$613FlexibilityNo cancel feeOn-time70%
KLMCheapest$520Average$704FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$569Average$796FlexibilityNo cancel feeOn-time69%

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