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

Flights via Atlanta (ATL) offer the lowest average round-trip price of $457.

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

Flights connecting via Philadelphia (PHL) have the shortest average one-way travel time: 11h 11m.

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

Montreal (YUL) was the most common stop: 29% of momondo users choosing 1-stop flights on this route connected there.

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

Philadelphia (PHL) has the shortest average layover time for this route: 1h 15m.

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

United Airlines, Lufthansa, and Aer Lingus are the most popular carriers operating from Lambert-St Louis to Rome

What airlines fly to Rome?

American Airlines, United Airlines and Air Canada are the top three most popular airlines that fly to Rome from St. Louis according to our data. American Airlines is the first choice among our users, with 41% 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.

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 March 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

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

Prices are currently typical for flights on this route. Typical prices usually range from $647 to $1,420. The lowest price recently found on this route was $678.

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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.

1:30 pm - 11:05 am

STL

FCO

38h 35m

2 stops

7:25 pm - 8:50 pm

FCO

STL

32h 25m

2 stops

$678Scandinavian Airlines

Sat, Sep 5 - Sun, Sep 13

10:08 am - 12:05 pm

STL

FCO

18h 57m

1 stop

10:00 am - 8:19 pm

FCO

STL

17h 19m

1 stop

$690Iberia

Wed, Aug 5 - Wed, Aug 19

4:18 pm - 9:10 am

STL

FCO

33h 52m

1 stop

1:10 pm - 11:03 pm

FCO

STL

16h 53m

1 stop

$691British Airways

Sat, Aug 8 - Wed, Aug 26

10:08 am - 12:05 pm

STL

FCO

18h 57m

1 stop

1:10 pm - 11:03 pm

FCO

STL

16h 53m

1 stop

$708Iberia

Wed, Aug 5 - Wed, Aug 19

3:42 pm - 11:05 am

STL

FCO

36h 23m

2 stops

6:55 pm - 8:50 pm

FCO

STL

32h 55m

2 stops

$711Scandinavian Airlines

Thu, Aug 27 - Sat, Sep 5

6:29 am - 7:05 am

STL

FCO

17h 36m

1 stop

12:15 pm - 7:29 pm

FCO

STL

14h 14m

1 stop

$724American Airlines

Wed, Apr 15 - Thu, Apr 23

6:29 am - 7:05 am

STL

FCO

17h 36m

1 stop

11:05 am - 10:07 pm

FCO

STL

18h 02m

2 stops

$729American Airlines

Wed, Apr 15 - Thu, Apr 23

1:01 pm - 10:20 am

STL

FCO

14h 19m

1 stop

6:45 am - 8:23 pm

FCO

STL

20h 38m

2 stops

$738British Airways

Wed, Aug 5 - Wed, Aug 19

1:00 pm - 9:30 pm

STL

CIA

25h 30m

3 stops

9:05 pm - 8:25 pm

CIA

STL

30h 20m

3 stops

$1,830Multiple Airlines

Fri, Jun 5 - Tue, Jun 16

4:05 pm - 9:20 pm

STL

CIA

22h 15m

3 stops

9:50 pm - 3:25 pm

CIA

STL

24h 35m

2 stops

$1,918Multiple Airlines

Sun, Mar 29 - Sat, Apr 4

United Airlines flights from St. Louis to Rome

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

United Airlines

Apr 15

STL7:45 amLambert-St Louis

17h 30m

2 stops

FCO8:15 amRome Fiumicino

Apr 21

FCO11:30 amRome Fiumicino

40h 43m

2 stops

STL9:13 pmLambert-St Louis

$811

United Airlines

Apr 15

STL7:45 amLambert-St Louis

17h 30m

2 stops

FCO8:15 amRome Fiumicino

Apr 23

FCO12:25 pmRome Fiumicino

34h 00m

1 stop

STL3:25 pmLambert-St Louis

$823

United Airlines

Apr 15

STL7:45 amLambert-St Louis

17h 30m

2 stops

FCO8:15 amRome Fiumicino

Apr 23

FCO10:20 amRome Fiumicino

17h 53m

2 stops

STL9:13 pmLambert-St Louis

$825

Air Canada flights from St. Louis to Rome

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

Air Canada

Apr 15

STL6:30 amLambert-St Louis

20h 50m

2 stops

FCO10:20 amRome Fiumicino

Apr 21

FCO11:30 amRome Fiumicino

40h 43m

2 stops

STL9:13 pmLambert-St Louis

$815

Air Canada

Apr 14

STL4:05 pmLambert-St Louis

34h 10m

2 stops

FCO9:15 amRome Fiumicino

Apr 21

FCO12:25 pmRome Fiumicino

34h 00m

1 stop

STL3:25 pmLambert-St Louis

$832

Air Canada

Apr 15

STL6:30 amLambert-St Louis

20h 50m

2 stops

FCO10:20 amRome Fiumicino

Apr 21

FCO12:25 pmRome Fiumicino

34h 00m

1 stop

STL3:25 pmLambert-St Louis

$833

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 9/5

1:30 pm-11:05 am

2 stops38h 35m

Rome Fiumicino

Sun 9/13

7:25 pm-8:50 pm

2 stops32h 25m

$678

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 8/5

10:08 am-12:05 pm

1 stop18h 57m

Rome Fiumicino

Wed 8/19

10:00 am-8:19 pm

1 stop17h 19m

$690

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 8/8

4:18 pm-9:10 am

1 stop33h 52m

Rome Fiumicino

Wed 8/26

1:10 pm-11:03 pm

1 stop16h 53m

$691

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 8/5

10:08 am-12:05 pm

1 stop18h 57m

Rome Fiumicino

Wed 8/19

1:10 pm-11:03 pm

1 stop16h 53m

$708

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Thu 8/27

3:42 pm-11:05 am

2 stops36h 23m

Rome Fiumicino

Sat 9/5

6:55 pm-8:50 pm

2 stops32h 55m

$711

Quickest round-trip

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 4/15

6:29 am-7:05 am

1 stop17h 36m

Rome Fiumicino

Thu 4/23

12:15 pm-7:29 pm

1 stop14h 14m

$724

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 4/15

6:29 am-7:05 am

1 stop17h 36m

Rome Fiumicino

Thu 4/23

11:05 am-10:07 pm

2 stops18h 02m

$729

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 8/5

1:01 pm-10:20 am

1 stop14h 19m

Rome Fiumicino

Wed 8/19

6:45 am-8:23 pm

2 stops20h 38m

$738

St. LouisRome

STL - CIA

STLCIA

Lambert-St Louis

Fri 6/5

1:00 pm-9:30 pm

3 stops25h 30m

Rome Ciampino

Tue 6/16

9:05 pm-8:25 pm

3 stops30h 20m

$1,830

St. LouisRome

STL - CIA

STLCIA

Lambert-St Louis

Sun 3/29

4:05 pm-9:20 pm

3 stops22h 15m

Rome Ciampino

Sat 4/4

9:50 pm-3:25 pm

2 stops24h 35m

$1,918

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?

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 $540, 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 $663.

How far in advance should I book a flight 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 $897 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 $731 on momondo.

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

You could potentially save up to 4% 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

Fastest flight time	12h 25m
Direct flights	None

The fastest flight from St. Louis to Rome takes 12h 25m

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

Search flight deals

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 12h 25m 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 March 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 (34% of total bookings). The next most popular airlines are Air Canada (16%), Delta (16%), and American Airlines (11%).

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 7,792 reviews	Search British Airways flights
Lufthansa	PriceFrom $506	Free Cancellation	Rating 6.8 7,849 reviews	Search Lufthansa flights
KLM	PriceFrom $506	Free Cancellation	Rating 7.8 1,471 reviews	Search KLM flights
United Airlines	PriceFrom $543	Free Cancellation	Rating 7.4 9,427 reviews	Search United Airlines flights
Delta	PriceFrom $555	Free Cancellation	Rating 7.9 8,293 reviews	Search Delta flights
American Airlines	PriceFrom $665	Free Cancellation	Rating 7.1 11,472 reviews	Search American Airlines flights
Air Canada	PriceFrom $705	Free Cancellation	Rating 7.1 10,801 reviews	Search Air Canada flights

Fiumicino

Civitavecchia

Cassino

Ponza

Gaeta

Montepulciano

Pienza

Tivoli

Sperlonga

Orvieto

Chianciano Terme

Terracina

Santa Marinella

Ascoli Piceno

Ciampino

Sabaudia

Saturnia

Grosseto

Orbetello

Cortona

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 $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 9/9. 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 St. Louis to Rome

Our best United Airlines 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 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

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

Fastest flight time

Direct flights

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.

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