What is the cheapest airline that flies from Lambert-St Louis to Rome?

Lufthansa, Air Canada, and American Airlines are the most popular carriers operating from Lambert-St Louis to Rome

Which layover airport has the shortest connection time from St. Louis to Rome?

Charlotte (CLT) has the shortest average layover time for this route: 2h 12m.

Which airport is the most popular layover for flights between St. Louis and Rome?

Montreal (YUL) was the most common stop: 58% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Rome?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Rome from St. Louis according to our data. United Airlines is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Rome. Keep in mind that there are 7 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 St. Louis to Rome?

Flights connecting via Charlotte (CLT) have the shortest average one-way travel time: 11h 55m.

Which layover airport offers the lowest fares from St. Louis to Rome?

Flights via Charlotte (CLT) offer the lowest average round-trip price of $825.

When did momondo last update prices for flights from Lambert-St Louis Airport to Rome?

Prices for flights from Lambert-St Louis Airport to Rome were last updated today.

How many operators does momondo search for flights from Lambert-St Louis Airport to Rome?

As of August 2026, there are 7 operators available to choose from for flights from Lambert-St Louis Airport to Rome.

How old do you have to be to fly from Lambert-St Louis Airport to Rome?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis 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.

$340 Cheap Flights from St. Louis to Rome in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Rome

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:33 am - 8:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

18h 22m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

8:15 pm - 3:26 pmFCO Rome Fiumicino-STL Lambert-St Louis

50h 11m2 stops Zurich Toronto Pearson Intl

$774Multiple Airlines

Sun, Feb 7 - Mon, Mar 8

6:30 am - 8:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

19h 25m2 stops Newark Montreal Pierre Elliott Trudeau Intl

1:15 pm - 12:40 pmFCO Rome Fiumicino-STL Lambert-St Louis

30h 25m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$775United Airlines

Sun, Jan 10 - Fri, Jan 15

6:30 am - 7:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

18h 25m1 stop Newark

1:15 pm - 11:09 amFCO Rome Fiumicino-STL Lambert-St Louis

28h 54m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$776United Airlines

Sun, Jan 10 - Fri, Jan 15

4:05 pm - 8:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

33h 50m1 stop Toronto Pearson Intl

11:15 am - 4:56 pmFCO Rome Fiumicino-STL Lambert-St Louis

36h 41m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$784Air Canada

Sun, Jan 10 - Thu, Jan 14

9:40 am - 8:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

40h 15m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

11:15 am - 3:41 pmFCO Rome Fiumicino-STL Lambert-St Louis

35h 26m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$784Air Canada

Sat, Jan 9 - Thu, Jan 14

6:00 am - 8:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

19h 55m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

7:05 am - 1:45 pmFCO Rome Fiumicino-STL Lambert-St Louis

13h 40m1 stop Frankfurt am Main

$792Multiple Airlines

Wed, Nov 11 - Wed, Nov 18

7:24 am - 10:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

20h 21m1 stop Dallas/Fort Worth

11:00 am - 8:26 pmFCO Rome Fiumicino-STL Lambert-St Louis

16h 26m1 stop Philadelphia

$800British Airways

Wed, Nov 11 - Wed, Nov 18

6:59 pm - 11:20 amSTL Lambert-St Louis-FCO Rome Fiumicino

33h 21m1 stop Atlanta Hartsfield-Jackson

10:25 am - 6:01 pmFCO Rome Fiumicino-STL Lambert-St Louis

14h 36m1 stop Atlanta Hartsfield-Jackson

$801Delta

Sat, Jan 9 - Thu, Jan 14

6:59 pm - 11:20 amSTL Lambert-St Louis-FCO Rome Fiumicino

33h 21m1 stop Atlanta Hartsfield-Jackson

6:10 am - 4:50 pmFCO Rome Fiumicino-STL Lambert-St Louis

17h 40m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$801Delta

Sat, Jan 9 - Fri, Jan 15

5:27 pm - 4:55 pmSTL Lambert-St Louis-FCO Rome Fiumicino

16h 28m2 stops Chicago O'Hare Intl London Heathrow

1:00 pm - 10:44 pmFCO Rome Fiumicino-STL Lambert-St Louis

16h 44m1 stop Philadelphia

$818British Airways

Sun, Jan 10 - Sat, Jan 16

Cheap last minute flights

Enter your travel dates to find the best prices.

12:10 pm - 9:15 amSTL Lambert-St Louis-FCO Rome Fiumicino

14h 05m1 stop Montreal Pierre Elliott Trudeau Intl

6:35 pm - 1:25 pmFCO Rome Fiumicino-STL Lambert-St Louis

25h 50m1 stop Frankfurt am Main

$991Multiple Airlines

Sun, Aug 30 - Mon, Sep 7

2:40 pm - 11:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

14h 05m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

1:20 pm - 1:25 pmFCO Rome Fiumicino-STL Lambert-St Louis

31h 05m1 stop Frankfurt am Main

$994Multiple Airlines

Sun, Aug 30 - Mon, Sep 7

3:30 pm - 12:30 pmSTL Lambert-St Louis-FCO Rome Fiumicino

14h 00m1 stop Frankfurt am Main

6:50 am - 1:25 pmFCO Rome Fiumicino-STL Lambert-St Louis

13h 35m1 stop Frankfurt am Main

$998Lufthansa

Mon, Aug 31 - Sun, Sep 6

3:30 pm - 12:30 pmSTL Lambert-St Louis-FCO Rome Fiumicino

14h 00m1 stop Frankfurt am Main

6:50 am - 1:25 pmFCO Rome Fiumicino-STL Lambert-St Louis

13h 35m1 stop Frankfurt am Main

$1,000Lufthansa

Mon, Aug 31 - Sun, Sep 6

12:10 pm - 9:15 amSTL Lambert-St Louis-FCO Rome Fiumicino

14h 05m1 stop Montreal Pierre Elliott Trudeau Intl

11:30 am - 6:41 pmFCO Rome Fiumicino-STL Lambert-St Louis

14h 11m1 stop Montreal Pierre Elliott Trudeau Intl

$1,029Air Canada

Fri, Aug 28 - Tue, Sep 8

12:59 pm - 7:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

11h 56m1 stop Chicago O'Hare Intl

11:30 am - 3:38 pmFCO Rome Fiumicino-STL Lambert-St Louis

35h 08m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$1,033United Airlines

Fri, Aug 28 - Tue, Sep 8

1:36 pm - 12:20 pmSTL Lambert-St Louis-FCO Rome Fiumicino

15h 44m1 stop Denver Intl

11:30 am - 11:38 pmFCO Rome Fiumicino-STL Lambert-St Louis

43h 08m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$1,033United Airlines

Fri, Aug 28 - Tue, Sep 8

8:00 am - 9:15 amSTL Lambert-St Louis-FCO Rome Fiumicino

18h 15m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

11:30 am - 2:15 pmFCO Rome Fiumicino-STL Lambert-St Louis

33h 45m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$1,036Air Canada

Fri, Aug 28 - Tue, Sep 8

10:33 am - 11:25 amSTL Lambert-St Louis-FCO Rome Fiumicino

17h 52m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle

6:30 am - 4:17 pmFCO Rome Fiumicino-STL Lambert-St Louis

16h 47m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$1,067Delta

Mon, Aug 31 - Sun, Sep 6

4:54 pm - 11:20 pmSTL Lambert-St Louis-FCO Rome Fiumicino

23h 26m2 stops Chicago O'Hare Intl London Heathrow

12:00 pm - 12:27 amFCO Rome Fiumicino-STL Lambert-St Louis

19h 27m2 stops London Heathrow Chicago O'Hare Intl

$9,802British Airways

Fri, Aug 28 - Fri, Sep 11

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Air Canada flights from St. Louis to Rome

Our best Air Canada deals on St. Louis to Rome flight tickets

Air Canada

Jan 10

STL6:00 amLambert-St Louis

19h 55m

2 stops

FCO8:55 amRome Fiumicino

Jan 14

FCO11:15 amRome Fiumicino

40h 58m

2 stops

STL9:13 pmLambert-St Louis

$784

Air Canada

Jan 8

STL4:05 pmLambert-St Louis

57h 50m

2 stops

FCO8:55 amRome Fiumicino

Jan 14

FCO11:15 amRome Fiumicino

37h 51m

2 stops

STL6:06 pmLambert-St Louis

$788

Air Canada

Jan 11

STL7:04 pmLambert-St Louis

32h 51m

2 stops

FCO10:55 amRome Fiumicino

Jan 14

FCO11:15 amRome Fiumicino

40h 58m

2 stops

STL9:13 pmLambert-St Louis

$789

United Airlines flights from St. Louis to Rome

Our best United Airlines deals on St. Louis to Rome flight tickets

United Airlines

Jan 10

STL6:30 amLambert-St Louis

19h 25m

2 stops

FCO8:55 amRome Fiumicino

Jan 15

FCO1:15 pmRome Fiumicino

30h 25m

2 stops

STL12:40 pmLambert-St Louis

$775

United Airlines

Jan 10

STL6:30 amLambert-St Louis

18h 25m

1 stop

FCO7:55 amRome Fiumicino

Jan 15

FCO1:15 pmRome Fiumicino

28h 54m

2 stops

STL11:09 amLambert-St Louis

$776

United Airlines

Jan 11

STL7:30 amLambert-St Louis

18h 00m

2 stops

FCO8:30 amRome Fiumicino

Jan 15

FCO1:15 pmRome Fiumicino

30h 25m

2 stops

STL12:40 pmLambert-St Louis

$780

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sun 2/7

7:33 am-8:55 am

2 stops18h 22m

Rome Fiumicino

Mon 3/8

8:15 pm-3:26 pm

2 stops50h 11m

$774

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sun 1/10

6:30 am-8:55 am

2 stops19h 25m

Rome Fiumicino

Fri 1/15

1:15 pm-12:40 pm

2 stops30h 25m

$775

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sun 1/10

6:30 am-7:55 am

1 stop18h 25m

Rome Fiumicino

Fri 1/15

1:15 pm-11:09 am

2 stops28h 54m

$776

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sun 1/10

4:05 pm-8:55 am

1 stop33h 50m

Rome Fiumicino

Thu 1/14

11:15 am-4:56 pm

2 stops36h 41m

$784

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sat 1/9

9:40 am-8:55 am

2 stops40h 15m

Rome Fiumicino

Thu 1/14

11:15 am-3:41 pm

2 stops35h 26m

$784

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Wed 11/11

6:00 am-8:55 am

2 stops19h 55m

Rome Fiumicino

Wed 11/18

7:05 am-1:45 pm

1 stop13h 40m

$792

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Wed 11/11

7:24 am-10:45 am

1 stop20h 21m

Rome Fiumicino

Wed 11/18

11:00 am-8:26 pm

1 stop16h 26m

$800

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sat 1/9

6:59 pm-11:20 am

1 stop33h 21m

Rome Fiumicino

Thu 1/14

10:25 am-6:01 pm

1 stop14h 36m

$801

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sat 1/9

6:59 pm-11:20 am

1 stop33h 21m

Rome Fiumicino

Fri 1/15

6:10 am-4:50 pm

2 stops17h 40m

$801

Quickest round-trip

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sun 1/10

5:27 pm-4:55 pm

2 stops16h 28m

Rome Fiumicino

Sat 1/16

1:00 pm-10:44 pm

1 stop16h 44m

$818

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 St. Louis 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 St. Louis and Rome?

Prices are currently low for flights on this route.

Typical prices usually range from $992 to $1,451.
The lowest price recently found on this route was $774.

What is the cheapest month to fly to Rome?

The cheapest month to fly to Rome from St. Louis is in February. Flight prices, which tend to average around $527, 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 January is also cheap. Prices for this month can be found on momondo for an average of $674.

How far in advance should I book a flight from St. Louis to Rome?

You are more likely to see cheaper flights to Rome from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Rome for around $1,004 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Rome from St. Louis for as low as $729 on momondo.

Can stopping save me money on St. Louis to Rome flights?

You could potentially save up to 21% on your flight if you consider stops on a St. Louis to Rome flight.

How have St. Louis to Rome flight prices changed over time?

When to book flights from St. Louis to Rome

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

Estimated round-trip price

Cheap St. Louis to Rome (STL to ROM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Rome

Best Price Found	$340
Fastest flight time	11h 50m
Direct flights	None

The best one-way flight to Rome from St. Louis in the past 72 hours is $340. The best round-trip flight deal from St. Louis to Rome found on momondo in the last 72 hours is $774.

The fastest flight from St. Louis to Rome takes 11h 50m

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

Search flight deals

Frequently asked questions about flying from St. Louis to Rome

How far is Lambert-St Louis to Rome by plane?
A flight from Lambert-St Louis to Rome will travel around 5053.3 mi. Typically, this will take 11h 50m by plane in normal conditions.
When did momondo last update prices for flights from Lambert-St Louis Airport to Rome?
Prices for flights from Lambert-St Louis Airport to Rome were last updated today.
How many operators does momondo search for flights from Lambert-St Louis Airport to Rome?
As of August 2026, there are 7 operators available to choose from for flights from Lambert-St Louis Airport to Rome.
How old do you have to be to fly from Lambert-St Louis Airport to Rome?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis 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 St. Louis to Rome?
Based on momondo bookings for this flight route, the most popular airline on flight routes from St. Louis to Rome is United Airlines (32% of total bookings). The next most popular airlines are British Airways (17%), Air Canada (16%), and Delta (13%).

Best airlines flying from St. Louis to Rome

Compare and see reviews for airlines that fly from St. Louis to Rome with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $472	Free Cancellation	Rating 6.7 8,194 reviews	Search British Airways flights
Lufthansa	PriceFrom $500	Free Cancellation	Rating 6.8 8,225 reviews	Search Lufthansa flights
KLM	PriceFrom $506	Free Cancellation	Rating 7.8 1,565 reviews	Search KLM flights
Delta	PriceFrom $665	Free Cancellation	Rating 7.8 8,531 reviews	Search Delta flights
United Airlines	PriceFrom $665	Free Cancellation	Rating 7.4 10,132 reviews	Search United Airlines flights
Air Canada	PriceFrom $810	Free Cancellation	Rating 7.1 11,544 reviews	Search Air Canada flights
American Airlines	PriceFrom $867	Free Cancellation	Rating 7.1 12,014 reviews	Search American 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 St. Louis to Rome?

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

Can I find flights from St. Louis to Rome with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Rome from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Rome?

Once all potential St. Louis to Rome flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are not ready to book a flight from St. Louis to Rome now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Rome and let you know when they change.

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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Sat 9/26

Sat 10/3

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Italy

Nearby airports

Airlines

Cabin classes

Other Italy destinations

Other flights from St. Louis

Complete your trip

Feeling lucky

Fly into one of these airports located in Rome

Rome Ciampino Airport

Rome Fiumicino Airport

Cheap flights from St. Louis to Rome from $340

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Rome departing on 10/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from St. Louis to Rome

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Air Canada flights from St. Louis to Rome

Our best Air Canada deals on St. Louis to Rome flight tickets

United Airlines flights from St. Louis to Rome

Our best United Airlines deals on St. Louis to Rome flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from St. Louis to Rome that are best for you.

See travel insights to Rome from

How to get the cheapest flight ticket from St. Louis to Rome

What is the typical price of a round-trip flight between St. Louis and Rome?

What is the cheapest month to fly to Rome?

How far in advance should I book a flight from St. Louis to Rome?

Can stopping save me money on St. Louis to Rome flights?

How have St. Louis to Rome flight prices changed over time?

What is the cheapest airline that flies from Lambert-St Louis to Rome?

What airlines fly to Rome?

Which airport is the most popular layover for flights between St. Louis and Rome?

Which layover airport offers the lowest fares from St. Louis to Rome?

Which layover airport has the shortest travel time from St. Louis to Rome?

Which layover airport has the shortest connection time from St. Louis to Rome?

When to book flights from St. Louis to Rome

Cheap St. Louis to Rome (STL to ROM) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from St. Louis to Rome

Best airlines flying from St. Louis to Rome

Compare and see reviews for airlines that fly from St. Louis 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.

Popular cities in Italy

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

Fly to other destinations from St. Louis

According to popular flight searches on momondo this year

Complete your trip to Rome

Explore popular destinations other users love

According to popular flight searches on momondo this year