What is the cheapest airline that flies from Ontario to Rome?

United Airlines and Alaska Airlines are the most popular carriers operating from Ontario to Rome

What airlines fly to Rome?

ITA Airways, Norse Atlantic Airways and United Airlines are the top three most popular airlines that fly to Rome from Ontario according to our data. ITA Airways is the first choice among our users, with 52% of people opting to fly with this airline when traveling to Rome. Keep in mind that there are 20 different airlines that fly to Rome on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest travel time from Ontario to Rome?

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 13h 46m.

Which layover airport offers the lowest fares from Ontario to Rome?

Flights via Denver (DEN) offer the lowest average round-trip price of $674.

Which layover airport has the shortest connection time from Ontario to Rome?

Denver (DEN) has the shortest average layover time for this route: 1h 14m.

Which airport is the most popular layover for flights between Ontario and Rome?

San Francisco (SFO) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

When did momondo last update prices for flights from Ontario Airport to Rome?

Prices for flights from Ontario Airport to Rome refresh daily.

How many operators does momondo search for flights from Ontario Airport to Rome?

The number of operators available for flights from Ontario Airport to Rome is 3 as of April 2026.

How old do you have to be to fly from Ontario Airport to Rome?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Rome.

What documentation or ID do you need to fly to Rome?

The necessary travel and health documents for your Rome trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$335 Cheap Flights from Ontario to Rome in 2026

Q: What is the typical price of a round-trip flight between Ontario and Rome?

Prices are currently low for flights on this route. Typical prices usually range from $888 to $561. The lowest price recently found on this route was $707.

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Find the cheapest flights from Ontario to Rome

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:13 pm - 1:40 pm

ONT

FCO

33h 27m

1 stop

11:30 am - 12:12 pm

FCO

ONT

57h 42m

2 stops

$707United Airlines

Sun, Aug 16 - Tue, Aug 25

7:13 pm - 11:45 am

ONT

FCO

31h 32m

2 stops

2:20 pm - 6:19 pm

FCO

ONT

36h 59m

2 stops

$710United Airlines

Mon, Aug 17 - Wed, Aug 26

5:45 am - 1:15 pm

ONT

FCO

22h 30m

2 stops

2:20 pm - 6:19 pm

FCO

ONT

36h 59m

2 stops

$711United Airlines

Tue, Aug 18 - Wed, Aug 26

7:05 am - 7:35 am

ONT

FCO

15h 30m

1 stop

9:45 am - 6:33 pm

FCO

ONT

17h 48m

1 stop

$720Multiple Airlines

Sun, Apr 19 - Tue, May 5

5:45 am - 8:15 am

ONT

FCO

41h 30m

2 stops

11:30 am - 12:12 pm

FCO

ONT

57h 42m

2 stops

$722United Airlines

Mon, Aug 17 - Tue, Aug 25

1:00 pm - 4:25 pm

ONT

FCO

18h 25m

2 stops

1:10 pm - 11:06 pm

FCO

ONT

18h 56m

1 stop

$723American Airlines

Tue, Aug 18 - Tue, Aug 25

12:35 pm - 5:05 pm

ONT

FCO

19h 30m

2 stops

1:10 pm - 9:08 pm

FCO

ONT

16h 58m

1 stop

$724British Airways

Sun, Aug 16 - Thu, Aug 27

1:44 pm - 1:40 pm

ONT

FCO

14h 56m

1 stop

6:50 am - 6:11 pm

FCO

ONT

20h 21m

2 stops

$725United Airlines

Mon, Aug 17 - Tue, Aug 25

7:00 am - 7:35 am

ONT

FCO

15h 35m

1 stop

10:35 am - 4:14 pm

FCO

ONT

38h 39m

2 stops

$727Delta

Mon, Aug 17 - Mon, Aug 24

8:00 am - 9:15 am

ONT

FCO

40h 15m

2 stops

10:00 am - 12:12 pm

FCO

ONT

35h 12m

2 stops

$728United Airlines

Sun, Aug 16 - Tue, Aug 25

United Airlines flights from Ontario to Rome

Our best United Airlines deals on Ontario to Rome flight tickets

United Airlines

Aug 16

ONT7:13 pmOntario

33h 27m

1 stop

FCO1:40 pmRome Fiumicino

Aug 25

FCO11:30 amRome Fiumicino

57h 42m

2 stops

ONT12:12 pmOntario

$707

United Airlines

Aug 17

ONT7:13 pmOntario

31h 32m

2 stops

FCO11:45 amRome Fiumicino

Aug 26

FCO2:20 pmRome Fiumicino

36h 59m

2 stops

ONT6:19 pmOntario

$710

United Airlines

Aug 18

ONT5:45 amOntario

22h 30m

2 stops

FCO1:15 pmRome Fiumicino

Aug 26

FCO2:20 pmRome Fiumicino

36h 59m

2 stops

ONT6:19 pmOntario

$711

American Airlines flights from Ontario to Rome

Our best American Airlines deals on Ontario to Rome flight tickets

American Airlines

Aug 18

ONT1:00 pmOntario

18h 25m

2 stops

FCO4:25 pmRome Fiumicino

Aug 25

FCO1:10 pmRome Fiumicino

18h 56m

1 stop

ONT11:06 pmOntario

$723

American Airlines

Aug 2

ONT1:10 pmOntario

18h 55m

2 stops

FCO5:05 pmRome Fiumicino

Aug 25

FCO7:40 amRome Fiumicino

19h 37m

2 stops

ONT6:17 pmOntario

$741

American Airlines

Apr 22

ONT12:19 pmOntario

19h 36m

2 stops

FCO4:55 pmRome Fiumicino

Apr 28

FCO11:05 amRome Fiumicino

20h 31m

2 stops

ONT10:36 pmOntario

$758

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 8/16

7:13 pm-1:40 pm

1 stop33h 27m

Rome Fiumicino

Tue 8/25

11:30 am-12:12 pm

2 stops57h 42m

$707

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 8/17

7:13 pm-11:45 am

2 stops31h 32m

Rome Fiumicino

Wed 8/26

2:20 pm-6:19 pm

2 stops36h 59m

$710

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 8/18

5:45 am-1:15 pm

2 stops22h 30m

Rome Fiumicino

Wed 8/26

2:20 pm-6:19 pm

2 stops36h 59m

$711

Quickest round-trip

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

$720

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 8/17

5:45 am-8:15 am

2 stops41h 30m

Rome Fiumicino

Tue 8/25

11:30 am-12:12 pm

2 stops57h 42m

$722

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 8/18

1:00 pm-4:25 pm

2 stops18h 25m

Rome Fiumicino

Tue 8/25

1:10 pm-11:06 pm

1 stop18h 56m

$723

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 8/16

12:35 pm-5:05 pm

2 stops19h 30m

Rome Fiumicino

Thu 8/27

1:10 pm-9:08 pm

1 stop16h 58m

$724

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 8/17

1:44 pm-1:40 pm

1 stop14h 56m

Rome Fiumicino

Tue 8/25

6:50 am-6:11 pm

2 stops20h 21m

$725

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 8/17

7:00 am-7:35 am

1 stop15h 35m

Rome Fiumicino

Mon 8/24

10:35 am-4:14 pm

2 stops38h 39m

$727

OntarioRome

ONT - FCO

ONTFCO

Ontario

Sun 8/16

8:00 am-9:15 am

2 stops40h 15m

Rome Fiumicino

Tue 8/25

10:00 am-12:12 pm

2 stops35h 12m

$728

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Rome

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Ontario and Rome?

What is the cheapest month to fly to Rome?

The cheapest month to fly to Rome from Ontario is in August. Flight prices, which tend to average around $565, are often lower during this time because this is during the off-season. If you aren’t able to travel to Rome during the month of August, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $604.

What is the cheapest day to depart on your flight to Rome?

The cheapest day to depart on your flight to Rome is on a Monday when prices can be found for as low as $692. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Rome on Sunday is $803.

What is the cheapest time of day to depart on your flight to Rome?

At noon is the cheapest time of day to fly from Ontario to Rome when you can find flight prices for as low as $582. Flying to Rome at noon is an ideal time because this is during off-peak travel hours. Flights to Rome are more costly in the afternoon, with an average ticket price of $785. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Ontario to Rome flights?

You could potentially save up to 52% on your flight if you consider stops on a Ontario to Rome flight.

When to book flights from Ontario to Rome

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Rome according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Ontario to Rome (ONT to ROM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Rome

Fastest flight time	14h 30m
Direct flights	None

The fastest flight from Ontario to Rome takes 14h 30m

There are no direct flights from Ontario to Rome. There are no popular flight routes from Ontario to Rome.

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Frequently asked questions about flying from Ontario to Rome

How far is Ontario to Rome by plane?
There are 6306.5 mi between Ontario and Rome. A reasonable flight in good conditions will take 14h 30m.
When did momondo last update prices for flights from Ontario Airport to Rome?
Prices for flights from Ontario Airport to Rome refresh daily.
How many operators does momondo search for flights from Ontario Airport to Rome?
The number of operators available for flights from Ontario Airport to Rome is 3 as of April 2026.
How old do you have to be to fly from Ontario Airport to Rome?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Rome.
What documentation or ID do you need to fly to Rome?
The necessary travel and health documents for your Rome trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Ontario to Rome?
Based on momondo bookings for flights between Ontario and Rome, the leading airline is United Airlines, making up 51% of the total bookings. Other popular airlines include British Airways with 36% and Delta with 14%.

Best airlines flying from Ontario to Rome

Compare and see reviews for airlines that fly from Ontario to Rome with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $475	Free Cancellation	Rating 7.9 8,392 reviews	Search Delta flights
British Airways	PriceFrom $487	Free Cancellation	Rating 6.7 7,864 reviews	Search British Airways flights
United Airlines	PriceFrom $508	Free Cancellation	Rating 7.4 9,554 reviews	Search United Airlines flights

Fiumicino

Civitavecchia

Cassino

Ponza

Gaeta

Montepulciano

Orvieto

Pienza

Chianciano Terme

Terracina

Tivoli

Ladispoli

Sperlonga

Santa Marinella

Ascoli Piceno

Ciampino

Saturnia

Grosseto

Orbetello

Cortona

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Rome?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Rome. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to Rome with flexible booking policies on momondo?

Yes. All flights to Rome from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Ontario to Rome?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Rome from Ontario.

I’m not ready to book a flight from Ontario to Rome right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Rome, momondo offers a useful price alert feature which will track prices for flights to Rome from Ontario and alert you when they change.

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Cheap flights from Ontario to Rome from $335

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Rome departing on 8/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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How to get the cheapest flight ticket from Ontario to Rome

What is the typical price of a round-trip flight between Ontario and Rome?

What is the cheapest month to fly to Rome?

What is the cheapest day to depart on your flight to Rome?

What is the cheapest time of day to depart on your flight to Rome?

Can stopping save me money on Ontario to Rome flights?

What is the cheapest airline that flies from Ontario to Rome?

What airlines fly to Rome?

Which airport is the most popular layover for flights between Ontario and Rome?

Which layover airport offers the lowest fares from Ontario to Rome?

Which layover airport has the shortest travel time from Ontario to Rome?

Which layover airport has the shortest connection time from Ontario to Rome?

When to book flights from Ontario to Rome

Cheap Ontario to Rome (ONT to ROM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Rome

Fastest flight time

Direct flights

Frequently asked questions about flying from Ontario to Rome

Best airlines flying from Ontario to Rome

Compare and see reviews for airlines that fly from Ontario to Rome with momondo

Traveling to a place near Rome?

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Airports listed have a maximum distance of 14.7 mi from Rome

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Cabin classes currently available on flights to Rome

List of cabin classes available on flights landing in Rome. Availability may vary depending on flight origin and airline.

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