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

Flights via San Francisco (SFO) offer the lowest average round-trip price of $687.

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

KLM, Delta, and United Airlines are the most popular carriers operating from Ontario to Rome

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.

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: 14h 02m.

What airlines fly to Rome?

ITA Airways, United Airlines and Delta 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 59% 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 connection time from Ontario to Rome?

Denver (DEN) has the shortest average layover time for this route: 1h 21m.

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 2 as of August 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.

$343 Cheap Flights from Ontario to Rome in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Rome

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One-way

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1:29 pm - 11:55 amONT Ontario-FCO Rome Fiumicino

13h 26m1 stop Denver Intl

2:10 pm - 9:38 amFCO Rome Fiumicino-ONT Ontario

28h 28m2 stops Munich Franz Josef Strauss San Francisco

$746Lufthansa

Wed, Nov 25 - Wed, Dec 9

1:29 pm - 11:55 amONT Ontario-FCO Rome Fiumicino

13h 26m1 stop Denver Intl

9:55 am - 8:29 pmFCO Rome Fiumicino-ONT Ontario

19h 34m2 stops Frankfurt am Main San Francisco

$747Lufthansa

Wed, Nov 25 - Wed, Dec 9

12:42 pm - 3:20 pmONT Ontario-FCO Rome Fiumicino

17h 38m2 stops Dallas/Fort Worth London Heathrow

1:10 pm - 10:36 pmFCO Rome Fiumicino-ONT Ontario

18h 26m1 stop Dallas/Fort Worth

$752British Airways

Tue, Nov 17 - Tue, Nov 24

7:05 am - 8:15 amONT Ontario-FCO Rome Fiumicino

16h 10m1 stop Atlanta Hartsfield-Jackson

10:25 am - 8:31 pmFCO Rome Fiumicino-ONT Ontario

19h 06m1 stop Atlanta Hartsfield-Jackson

$754Delta

Sun, Dec 6 - Tue, Dec 22

7:05 am - 8:15 amONT Ontario-FCO Rome Fiumicino

16h 10m1 stop Atlanta Hartsfield-Jackson

10:25 am - 8:59 pmFCO Rome Fiumicino-ONT Ontario

19h 34m1 stop Atlanta Hartsfield-Jackson

$754KLM

Wed, Nov 25 - Wed, Dec 9

11:20 am - 1:15 pmONT Ontario-FCO Rome Fiumicino

16h 55m2 stops San Francisco Munich Franz Josef Strauss

1:15 pm - 6:44 pmFCO Rome Fiumicino-ONT Ontario

38h 29m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$755United Airlines

Mon, Feb 8 - Fri, Feb 12

6:00 am - 8:30 amONT Ontario-FCO Rome Fiumicino

17h 30m2 stops San Francisco Washington, D.C. Dulles Intl

11:15 am - 9:21 pmFCO Rome Fiumicino-ONT Ontario

43h 06m2 stops Toronto Pearson Intl Houston George Bush Intcntl

$757United Airlines

Wed, Feb 3 - Thu, Feb 18

1:29 pm - 11:55 amONT Ontario-FCO Rome Fiumicino

13h 26m1 stop Denver Intl

7:05 am - 5:36 pmFCO Rome Fiumicino-ONT Ontario

19h 31m2 stops Frankfurt am Main San Francisco

$761United Airlines

Mon, Nov 30 - Tue, Dec 8

7:00 am - 11:20 amONT Ontario-FCO Rome Fiumicino

19h 20m1 stop Atlanta Hartsfield-Jackson

6:10 am - 11:48 pmFCO Rome Fiumicino-ONT Ontario

26h 38m2 stops Amsterdam Schiphol Salt Lake City

$768Delta

Sun, Jan 31 - Wed, Feb 17

7:00 am - 11:20 amONT Ontario-FCO Rome Fiumicino

19h 20m1 stop Atlanta Hartsfield-Jackson

12:45 pm - 4:12 pmFCO Rome Fiumicino-ONT Ontario

36h 27m2 stops Amsterdam Schiphol Salt Lake City

$768Delta

Mon, Feb 1 - Thu, Feb 18

Cheap last minute flights

Enter your travel dates to find the best prices.

6:20 am - 10:10 amONT Ontario-FCO Rome Fiumicino

18h 50m1 stop Seattle/Tacoma Intl

9:45 am - 8:05 pmFCO Rome Fiumicino-ONT Ontario

19h 20m1 stop Atlanta Hartsfield-Jackson

$818Delta

Mon, Aug 31 - Fri, Sep 11

6:20 am - 10:10 amONT Ontario-FCO Rome Fiumicino

18h 50m1 stop Seattle/Tacoma Intl

12:20 pm - 10:40 pmFCO Rome Fiumicino-ONT Ontario

19h 20m1 stop Seattle/Tacoma Intl

$818Delta

Mon, Aug 31 - Tue, Sep 8

1:18 pm - 12:20 pmONT Ontario-FCO Rome Fiumicino

14h 02m1 stop Denver Intl

2:20 pm - 8:53 pmFCO Rome Fiumicino-ONT Ontario

15h 33m1 stop Denver Intl

$818United Airlines

Sun, Aug 30 - Tue, Sep 15

1:18 pm - 12:20 pmONT Ontario-FCO Rome Fiumicino

14h 02m1 stop Denver Intl

2:20 pm - 8:53 pmFCO Rome Fiumicino-ONT Ontario

15h 33m1 stop Denver Intl

$818United Airlines

Sun, Aug 30 - Wed, Sep 9

1:18 pm - 12:20 pmONT Ontario-FCO Rome Fiumicino

14h 02m1 stop Denver Intl

3:40 pm - 10:51 pmFCO Rome Fiumicino-ONT Ontario

16h 11m1 stop San Francisco

$818United Airlines

Sun, Aug 30 - Fri, Sep 18

6:20 am - 10:10 amONT Ontario-FCO Rome Fiumicino

18h 50m1 stop Seattle/Tacoma Intl

9:45 am - 8:24 pmFCO Rome Fiumicino-ONT Ontario

19h 39m1 stop Atlanta Hartsfield-Jackson

$818Delta

Mon, Aug 31 - Wed, Sep 9

6:20 am - 10:10 amONT Ontario-FCO Rome Fiumicino

18h 50m1 stop Seattle/Tacoma Intl

12:20 pm - 10:40 pmFCO Rome Fiumicino-ONT Ontario

19h 20m1 stop Seattle/Tacoma Intl

$818Delta

Mon, Aug 31 - Thu, Sep 10

1:18 pm - 7:55 amONT Ontario-FCO Rome Fiumicino

33h 37m2 stops Denver Intl Chicago O'Hare Intl

7:10 am - 6:11 pmFCO Rome Fiumicino-ONT Ontario

20h 01m2 stops Frankfurt am Main San Francisco

$850Lufthansa

Fri, Aug 28 - Thu, Sep 10

1:18 pm - 12:20 pmONT Ontario-FCO Rome Fiumicino

14h 02m1 stop Denver Intl

6:50 am - 8:01 pmFCO Rome Fiumicino-ONT Ontario

22h 11m2 stops Frankfurt am Main San Francisco

$853Lufthansa

Fri, Aug 28 - Fri, Sep 11

1:18 pm - 12:20 pmONT Ontario-FCO Rome Fiumicino

14h 02m1 stop Denver Intl

2:20 pm - 8:53 pmFCO Rome Fiumicino-ONT Ontario

15h 33m1 stop Denver Intl

$861Lufthansa

Fri, Aug 28 - Fri, Sep 11

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United Airlines flights from Ontario to Rome

Our best United Airlines deals on Ontario to Rome flight tickets

United Airlines

Feb 3

ONT6:00 amOntario

17h 30m

2 stops

FCO8:30 amRome Fiumicino

Feb 18

FCO11:15 amRome Fiumicino

43h 06m

2 stops

ONT9:21 pmOntario

$757

United Airlines

Dec 2

ONT7:00 amOntario

15h 45m

1 stop

FCO7:45 amRome Fiumicino

Dec 9

FCO9:45 amRome Fiumicino

17h 59m

1 stop

ONT6:44 pmOntario

$763

United Airlines

Jan 11

ONT11:20 amOntario

16h 55m

2 stops

FCO1:15 pmRome Fiumicino

Jan 21

FCO7:05 amRome Fiumicino

19h 42m

2 stops

ONT5:47 pmOntario

$775

Air Canada flights from Ontario to Rome

Our best Air Canada deals on Ontario to Rome flight tickets

Air Canada

Jan 31

ONT5:00 amOntario

42h 55m

2 stops

FCO8:55 amRome Fiumicino

Feb 16

FCO11:15 amRome Fiumicino

42h 05m

2 stops

ONT8:20 pmOntario

$761

Air Canada

Nov 8

ONT5:00 amOntario

18h 55m

2 stops

FCO8:55 amRome Fiumicino

Nov 17

FCO11:15 amRome Fiumicino

42h 36m

2 stops

ONT8:51 pmOntario

$766

Air Canada

Nov 9

ONT5:00 amOntario

18h 55m

2 stops

FCO8:55 amRome Fiumicino

Nov 17

FCO11:15 amRome Fiumicino

42h 36m

2 stops

ONT8:51 pmOntario

$771

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioRome

ONT Ontario - FCO Rome Fiumicino

ONTFCO

Ontario

Wed 11/25

1:29 pm-11:55 am

1 stop13h 26m

Rome Fiumicino

Wed 12/9

2:10 pm-9:38 am

2 stops28h 28m

$746

OntarioRome

ONT Ontario - FCO Rome Fiumicino

ONTFCO

Ontario

Wed 11/25

1:29 pm-11:55 am

1 stop13h 26m

Rome Fiumicino

Wed 12/9

9:55 am-8:29 pm

2 stops19h 34m

$747

OntarioRome

ONT Ontario - FCO Rome Fiumicino

ONTFCO

Ontario

Tue 11/17

12:42 pm-3:20 pm

2 stops17h 38m

Rome Fiumicino

Tue 11/24

1:10 pm-10:36 pm

1 stop18h 26m

$752

OntarioRome

ONT Ontario - FCO Rome Fiumicino

ONTFCO

Ontario

Sun 12/6

7:05 am-8:15 am

1 stop16h 10m

Rome Fiumicino

Tue 12/22

10:25 am-8:31 pm

1 stop19h 06m

$754

OntarioRome

ONT Ontario - FCO Rome Fiumicino

ONTFCO

Ontario

Wed 11/25

7:05 am-8:15 am

1 stop16h 10m

Rome Fiumicino

Wed 12/9

10:25 am-8:59 pm

1 stop19h 34m

$754

OntarioRome

ONT Ontario - FCO Rome Fiumicino

ONTFCO

Ontario

Mon 2/8

11:20 am-1:15 pm

2 stops16h 55m

Rome Fiumicino

Fri 2/12

1:15 pm-6:44 pm

2 stops38h 29m

$755

OntarioRome

ONT Ontario - FCO Rome Fiumicino

ONTFCO

Ontario

Wed 2/3

6:00 am-8:30 am

2 stops17h 30m

Rome Fiumicino

Thu 2/18

11:15 am-9:21 pm

2 stops43h 06m

$757

Quickest round-trip

OntarioRome

ONT Ontario - FCO Rome Fiumicino

ONTFCO

Ontario

Mon 11/30

1:29 pm-11:55 am

1 stop13h 26m

Rome Fiumicino

Tue 12/8

7:05 am-5:36 pm

2 stops19h 31m

$761

OntarioRome

ONT Ontario - FCO Rome Fiumicino

ONTFCO

Ontario

Sun 1/31

7:00 am-11:20 am

1 stop19h 20m

Rome Fiumicino

Wed 2/17

6:10 am-11:48 pm

2 stops26h 38m

$768

OntarioRome

ONT Ontario - FCO Rome Fiumicino

ONTFCO

Ontario

Mon 2/1

7:00 am-11:20 am

1 stop19h 20m

Rome Fiumicino

Thu 2/18

12:45 pm-4:12 pm

2 stops36h 27m

$768

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?

Prices are currently typical for flights on this route.

Typical prices usually range from $622 to $777.
The lowest price recently found on this route was $746.

What is the cheapest month to fly to Rome?

The cheapest month to fly to Rome from Ontario is in February. Flight prices, which tend to average around $0, 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 February, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $612.

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 Wednesday when prices can be found for as low as $862. 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 Friday as prices are generally higher than usual. According to our data, the average ticket price to Rome on Friday is $910.

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 $608. 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 $907. 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 39% 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

Best Price Found	$343
Fastest flight time	13h 26m
Direct flights	None

The best one-way flight to Rome from Ontario in the past 72 hours is $343. The best round-trip flight deal from Ontario to Rome found on momondo in the last 72 hours is $746.

The fastest flight from Ontario to Rome takes 13h 26m

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

Search flight deals

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 13h 26m.
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 2 as of August 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 74% of the total bookings. Other popular airlines include British Airways with 26%.

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 $479	Free Cancellation	Rating 7.8 8,531 reviews		Search Delta flights
United Airlines	PriceFrom $508	Free Cancellation	Rating 7.4 10,127 reviews		Search United Airlines flights

Fiumicino

Civitavecchia

Gaeta

Orvieto

Montepulciano

Ladispoli

Pienza

Tivoli

Chianciano Terme

Orbetello

Ponza

Cassino

Ciampino

Porto Ercole

Sperlonga

Terracina

Saturnia

Ascoli Piceno

Foligno

Santa Marinella

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 $343

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 2/14. 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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United Airlines flights from Ontario to Rome

Our best United Airlines deals on Ontario to Rome flight tickets

Air Canada flights from Ontario to Rome

Our best Air Canada deals on Ontario to Rome flight tickets

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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

Best Price Found

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?

Why use momondo?

An easier way to manage your Rome trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Italy

Fly into one of these airports located in Rome

Airports listed have a maximum distance of 14.7 mi from Rome

Fly your favorite airline to Rome

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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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Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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