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

British Airways and Delta are the most popular carriers operating from Lambert-St Louis to Rome

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

Montreal (YUL) was the most common stop: 64% 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 offers the lowest fares from St. Louis to Rome?

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

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

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

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 October 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.

$329 Cheap Flights from St. Louis to Rome in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Rome

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 10:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

21h 55m1 stop Newark

1:15 pm - 4:17 pmFCO Rome Fiumicino-STL Lambert-St Louis

34h 02m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$656United Airlines

Sun, Nov 8 - Wed, Nov 18

7:30 am - 7:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

17h 15m1 stop Chicago O'Hare Intl

1:15 pm - 4:17 pmFCO Rome Fiumicino-STL Lambert-St Louis

34h 02m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$656United Airlines

Mon, Nov 9 - Wed, Nov 18

6:50 pm - 8:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

31h 05m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

1:15 pm - 3:43 pmFCO Rome Fiumicino-STL Lambert-St Louis

33h 28m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$659Air Canada

Sat, Nov 7 - Fri, Nov 20

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

43h 25m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

1:15 pm - 10:59 pmFCO Rome Fiumicino-STL Lambert-St Louis

40h 44m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$659Air Canada

Tue, Dec 1 - Wed, Dec 9

1:05 pm - 9:00 amSTL Lambert-St Louis-FCO Rome Fiumicino

12h 55m1 stop Philadelphia

7:30 am - 8:22 pmFCO Rome Fiumicino-STL Lambert-St Louis

19h 52m2 stops Madrid Barajas Chicago O'Hare Intl

$664Iberia

Sun, Feb 7 - Fri, Feb 19

5:29 pm - 4:55 pmSTL Lambert-St Louis-FCO Rome Fiumicino

16h 26m2 stops Chicago O'Hare Intl London Heathrow

11:00 am - 8:33 pmFCO Rome Fiumicino-STL Lambert-St Louis

16h 33m1 stop Philadelphia

$665American Airlines

Sun, Nov 8 - Tue, Nov 24

5:29 pm - 4:55 pmSTL Lambert-St Louis-FCO Rome Fiumicino

16h 26m2 stops Chicago O'Hare Intl London Heathrow

11:00 am - 8:33 pmFCO Rome Fiumicino-STL Lambert-St Louis

16h 33m1 stop Philadelphia

$667American Airlines

Sun, Nov 8 - Tue, Nov 24

8:29 am - 10:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

19h 16m1 stop Dallas/Fort Worth

1:10 pm - 9:59 pmFCO Rome Fiumicino-STL Lambert-St Louis

15h 49m1 stop Dallas/Fort Worth

$669British Airways

Mon, Nov 9 - Wed, Nov 18

1:45 pm - 1:55 pmSTL Lambert-St Louis-FCO Rome Fiumicino

17h 10m2 stops Chicago O'Hare Intl Madrid Barajas

7:30 am - 8:22 pmFCO Rome Fiumicino-STL Lambert-St Louis

19h 52m2 stops Madrid Barajas Chicago O'Hare Intl

$672Iberia

Sun, Feb 7 - Fri, Feb 19

5:38 pm - 5:50 pmSTL Lambert-St Louis-FCO Rome Fiumicino

17h 12m2 stops Chicago O'Hare Intl London Heathrow

1:10 pm - 8:46 pmFCO Rome Fiumicino-STL Lambert-St Louis

14h 36m1 stop Philadelphia

$673British Airways

Sun, Dec 6 - Tue, Dec 15

Cheap last minute flights

Enter your travel dates to find the best prices.

5:36 pm - 8:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

32h 19m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

6:35 pm - 9:40 pmFCO Rome Fiumicino-STL Lambert-St Louis

34h 05m2 stops Frankfurt am Main Chicago O'Hare Intl

$997Multiple Airlines

Sat, Oct 24 - Mon, Nov 2

5:36 pm - 8:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

32h 19m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

6:35 pm - 9:40 pmFCO Rome Fiumicino-STL Lambert-St Louis

34h 05m2 stops Frankfurt am Main Chicago O'Hare Intl

$998Multiple Airlines

Sat, Oct 24 - Mon, Nov 2

5:36 pm - 8:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

32h 19m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

12:40 pm - 11:24 pmFCO Rome Fiumicino-STL Lambert-St Louis

17h 44m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$1,017United Airlines

Sat, Oct 24 - Mon, Nov 2

7:01 pm - 8:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

30h 44m1 stop Chicago O'Hare Intl

2:10 pm - 8:59 pmFCO Rome Fiumicino-STL Lambert-St Louis

37h 49m2 stops Munich Franz Josef Strauss Denver Intl

$1,018Lufthansa

Sat, Oct 24 - Mon, Nov 2

5:36 pm - 8:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

32h 09m1 stop Chicago O'Hare Intl

2:10 pm - 8:59 pmFCO Rome Fiumicino-STL Lambert-St Louis

37h 49m2 stops Munich Franz Josef Strauss Denver Intl

$1,019Lufthansa

Sat, Oct 24 - Mon, Nov 2

8:00 am - 2:50 pmSTL Lambert-St Louis-FCO Rome Fiumicino

47h 50m2 stops Chicago O'Hare Intl Istanbul

11:15 am - 9:40 pmFCO Rome Fiumicino-STL Lambert-St Louis

41h 25m2 stops Istanbul Chicago O'Hare Intl

$1,024Turkish Airlines

Sat, Oct 24 - Mon, Nov 2

11:20 am - 11:15 amSTL Lambert-St Louis-FCO Rome Fiumicino

16h 55m1 stop Minneapolis St Paul

10:10 am - 11:54 pmFCO Rome Fiumicino-STL Lambert-St Louis

20h 44m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$1,063Delta

Sat, Oct 24 - Mon, Nov 2

10:47 am - 10:20 amSTL Lambert-St Louis-FCO Rome Fiumicino

16h 33m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

10:10 am - 11:54 pmFCO Rome Fiumicino-STL Lambert-St Louis

20h 44m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$1,067Delta

Sat, Oct 24 - Mon, Nov 2

8:00 am - 8:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

17h 45m1 stop Chicago O'Hare Intl

9:45 am - 9:40 pmFCO Rome Fiumicino-STL Lambert-St Louis

18h 55m1 stop Chicago O'Hare Intl

$1,261United Airlines

Sat, Oct 24 - Mon, Nov 2

8:00 am - 8:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

17h 45m1 stop Chicago O'Hare Intl

9:45 am - 9:40 pmFCO Rome Fiumicino-STL Lambert-St Louis

18h 55m1 stop Chicago O'Hare Intl

$1,346United Airlines

Sat, Oct 24 - Mon, Nov 2

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Delta flights from St. Louis to Rome

Our best Delta deals on St. Louis to Rome flight tickets

Delta

Nov 8

STL6:00 amLambert-St Louis

19h 15m

1 stop

FCO8:15 amRome Fiumicino

Nov 18

FCO10:00 amRome Fiumicino

14h 14m

1 stop

STL5:14 pmLambert-St Louis

$676

Delta

Nov 8

STL7:00 amLambert-St Louis

19h 35m

2 stops

FCO9:35 amRome Fiumicino

Nov 24

FCO10:00 amRome Fiumicino

20h 56m

2 stops

STL11:56 pmLambert-St Louis

$680

Delta

Nov 18

STL6:00 amLambert-St Louis

18h 45m

2 stops

FCO7:45 amRome Fiumicino

Nov 26

FCO12:55 pmRome Fiumicino

27h 30m

2 stops

STL9:25 amLambert-St Louis

$681

British Airways flights from St. Louis to Rome

Our best British Airways deals on St. Louis to Rome flight tickets

British Airways

Nov 9

STL11:35 amLambert-St Louis

18h 20m

2 stops

FCO12:55 pmRome Fiumicino

Nov 20

FCO1:10 pmRome Fiumicino

35h 55m

1 stop

STL6:05 pmLambert-St Louis

$673

British Airways

Dec 6

STL5:38 pmLambert-St Louis

17h 12m

2 stops

FCO5:50 pmRome Fiumicino

Dec 15

FCO12:15 pmRome Fiumicino

17h 02m

2 stops

STL10:17 pmLambert-St Louis

$685

British Airways

Nov 15

STL11:35 amLambert-St Louis

17h 45m

2 stops

FCO12:20 pmRome Fiumicino

Nov 23

FCO6:45 pmRome Fiumicino

35h 50m

2 stops

STL11:35 pmLambert-St Louis

$686

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 11/8

6:00 am-10:55 am

1 stop21h 55m

Rome Fiumicino

Wed 11/18

1:15 pm-4:17 pm

2 stops34h 02m

$656

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Mon 11/9

7:30 am-7:45 am

1 stop17h 15m

Rome Fiumicino

Wed 11/18

1:15 pm-4:17 pm

2 stops34h 02m

$656

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sat 11/7

6:50 pm-8:55 am

2 stops31h 05m

Rome Fiumicino

Fri 11/20

1:15 pm-3:43 pm

2 stops33h 28m

$659

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Tue 12/1

6:30 am-8:55 am

2 stops43h 25m

Rome Fiumicino

Wed 12/9

1:15 pm-10:59 pm

2 stops40h 44m

$659

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sun 2/7

1:05 pm-9:00 am

1 stop12h 55m

Rome Fiumicino

Fri 2/19

7:30 am-8:22 pm

2 stops19h 52m

$664

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sun 11/8

5:29 pm-4:55 pm

2 stops16h 26m

Rome Fiumicino

Tue 11/24

11:00 am-8:33 pm

1 stop16h 33m

$665

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sun 11/8

5:29 pm-4:55 pm

2 stops16h 26m

Rome Fiumicino

Tue 11/24

11:00 am-8:33 pm

1 stop16h 33m

$667

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Mon 11/9

8:29 am-10:45 am

1 stop19h 16m

Rome Fiumicino

Wed 11/18

1:10 pm-9:59 pm

1 stop15h 49m

$669

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sun 2/7

1:45 pm-1:55 pm

2 stops17h 10m

Rome Fiumicino

Fri 2/19

7:30 am-8:22 pm

2 stops19h 52m

$672

Quickest round-trip

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Sun 12/6

5:38 pm-5:50 pm

2 stops17h 12m

Rome Fiumicino

Tue 12/15

1:10 pm-8:46 pm

1 stop14h 36m

$673

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 $1,101 to $1,304.
The lowest price recently found on this route was $656.

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 $697.

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 $998 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 20% 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	$329
Fastest flight time	11h 32m
Direct flights	None

The best one-way flight to Rome from St. Louis in the past 72 hours is $329. The best round-trip flight deal from St. Louis to Rome found on momondo in the last 72 hours is $656.

The fastest flight from St. Louis to Rome takes 11h 32m

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 32m 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 October 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 (18%), Air Canada (15%), and Delta (15%).

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 8,266 reviews	Search British Airways flights
Lufthansa	PriceFrom $500	Free Cancellation	Rating 6.8 8,282 reviews	Search Lufthansa flights
KLM	PriceFrom $506	Free Cancellation	Rating 7.8 1,591 reviews	Search KLM flights
Delta	PriceFrom $596	Free Cancellation	Rating 7.8 8,652 reviews	Search Delta flights
Air Canada	PriceFrom $810	Free Cancellation	Rating 7.1 11,782 reviews	Search Air Canada flights
United Airlines	PriceFrom $851	Free Cancellation	Rating 7.3 10,388 reviews	Search United Airlines flights
American Airlines	PriceFrom $867	Free Cancellation	Rating 7.0 12,179 reviews	Search American Airlines flights

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Tivoli

Cassino

Ponza

Chianciano Terme

Ciampino

Montepulciano

Orbetello

Anzio

Saturnia

Foligno

Terracina

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.

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Cheap flights from St. Louis to Rome from $329

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 3/24. 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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Delta flights from St. Louis to Rome

Our best Delta deals on St. Louis to Rome flight tickets

British Airways flights from St. Louis to Rome

Our best British Airways deals on St. Louis to Rome flight tickets

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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

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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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