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

Chicago (ORD) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Atlanta (ATL) offer the lowest average round-trip price of $659.

What airlines fly to Rome Fiumicino Airport?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Rome Fiumicino Airport from St. Louis according to our data. United Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Rome Fiumicino Airport. Keep in mind that there are 8 different airlines that fly to Rome Fiumicino Airport on a routine basis, so you have a few additional options to choose from.

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

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 Fiumicino?

United Airlines, KLM, and Delta are the most popular carriers operating from Lambert-St Louis to Rome Fiumicino

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

Flights connecting via Philadelphia (PHL) have the shortest average one-way travel time: 11h 13m.

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

Prices for flights from Lambert-St Louis Airport to Rome Fiumicino Airport are refreshed on a daily basis.

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

As of September 2025, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to Rome Fiumicino Airport.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Rome Fiumicino Airport.

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

The travel and health documents you'll need for your trip to Rome Fiumicino Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Rome Fiumicino Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$278 Cheap Flights from St. Louis to Rome Fiumicino Airport in 2025/26

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

Prices are currently low for flights on this route. Typical prices usually range from $773 to $1,146. The lowest price recently found on this route was $532.

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Find the cheapest flights from St. Louis to Rome

Round-trip

One-way

Last minute

Cheap round-trip flights

3:23 pm - 1:05 pmSTL-FCO

14h 42m2 stops

7:05 am - 1:55 pmFCO-STL

13h 50m1 stop

$532United Airlines

Find Deal

Mon, Oct 20 - Wed, Nov 5

9:20 am - 8:15 amSTL-FCO

15h 55m2 stops

7:05 am - 5:39 pmFCO-STL

17h 34m2 stops

$534United Airlines

Find Deal

Mon, Oct 20 - Wed, Nov 5

3:59 pm - 11:05 amSTL-FCO

12h 06m1 stop

9:20 am - 8:13 amFCO-STL

29h 53m1 stop

$568Delta

Find Deal

Mon, Oct 20 - Wed, Nov 5

9:21 am - 10:30 amSTL-FCO

18h 09m1 stop

9:20 am - 4:33 pmFCO-STL

14h 13m1 stop

$575KLM

Find Deal

Sun, Nov 9 - Fri, Nov 21

4:05 pm - 8:55 amSTL-FCO

57h 50m2 stops

7:05 am - 3:29 pmFCO-STL

39h 24m2 stops

$577Air Canada

Find Deal

Mon, Nov 10 - Tue, Nov 18

4:05 pm - 9:25 amSTL-FCO

34h 20m2 stops

12:45 pm - 3:40 pmFCO-STL

33h 55m2 stops

$611Air Canada

Find Deal

Thu, Dec 4 - Tue, Dec 9

6:00 am - 9:00 amSTL-FCO

20h 00m1 stop

1:10 pm - 8:56 amFCO-STL

26h 46m1 stop

$631American Airlines

Find Deal

Sat, Dec 13 - Tue, Dec 23

9:43 am - 8:05 amSTL-FCO

15h 22m1 stop

12:10 pm - 11:58 pmFCO-STL

18h 48m1 stop

$665American Airlines

Find Deal

Tue, Oct 7 - Thu, Oct 16

10:45 am - 10:05 amSTL-FCO

16h 20m2 stops

9:45 am - 5:47 pmFCO-STL

15h 02m1 stop

$670Delta

Find Deal

Wed, Oct 8 - Thu, Oct 16

10:45 am - 9:20 amSTL-FCO

15h 35m1 stop

2:25 pm - 4:43 pmFCO-STL

33h 18m1 stop

$678KLM

Find Deal

Mon, Oct 13 - Fri, Oct 24

United Airlines flights from St. Louis to Rome Fiumicino Airport

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

United Airlines

Oct 20

STL3:23 pmLambert-St Louis

14h 42m

2 stops

FCO1:05 pmRome Fiumicino

Nov 5

FCO7:05 amRome Fiumicino

13h 50m

1 stop

STL1:55 pmLambert-St Louis

$532

Find similar

United Airlines

Oct 20

STL9:20 amLambert-St Louis

15h 55m

2 stops

FCO8:15 amRome Fiumicino

Nov 5

FCO7:05 amRome Fiumicino

17h 34m

2 stops

STL5:39 pmLambert-St Louis

$534

Find similar

United Airlines

Oct 20

STL12:25 pmLambert-St Louis

12h 30m

1 stop

FCO7:55 amRome Fiumicino

Nov 5

FCO7:05 amRome Fiumicino

13h 50m

1 stop

STL1:55 pmLambert-St Louis

$536

Find similar

British Airways flights from St. Louis to Rome Fiumicino Airport

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

British Airways

Sep 26

STL3:59 pmLambert-St Louis

24h 31m

2 stops

FCO11:30 pmRome Fiumicino

Sep 30

FCO9:05 pmRome Fiumicino

28h 27m

2 stops

STL6:32 pmLambert-St Louis

$886

Find similar

British Airways

Sep 26

STL3:59 pmLambert-St Louis

23h 36m

2 stops

FCO10:35 pmRome Fiumicino

Oct 6

FCO8:30 pmRome Fiumicino

29h 16m

2 stops

STL6:46 pmLambert-St Louis

$1,032

Find similar

British Airways

Sep 26

STL3:59 pmLambert-St Louis

24h 31m

2 stops

FCO11:30 pmRome Fiumicino

Oct 6

FCO8:30 pmRome Fiumicino

26h 53m

2 stops

STL4:23 pmLambert-St Louis

$1,058

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 10/20

3:23 pm-1:05 pm

2 stops14h 42m

Rome Fiumicino

Wed 11/5

7:05 am-1:55 pm

1 stop13h 50m

$532

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 10/20

9:20 am-8:15 am

2 stops15h 55m

Rome Fiumicino

Wed 11/5

7:05 am-5:39 pm

2 stops17h 34m

$534

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 10/20

3:59 pm-11:05 am

1 stop12h 06m

Rome Fiumicino

Wed 11/5

9:20 am-8:13 am

1 stop29h 53m

$568

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/9

9:21 am-10:30 am

1 stop18h 09m

Rome Fiumicino

Fri 11/21

9:20 am-4:33 pm

1 stop14h 13m

$575

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 11/10

4:05 pm-8:55 am

2 stops57h 50m

Rome Fiumicino

Tue 11/18

7:05 am-3:29 pm

2 stops39h 24m

$577

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Thu 12/4

4:05 pm-9:25 am

2 stops34h 20m

Rome Fiumicino

Tue 12/9

12:45 pm-3:40 pm

2 stops33h 55m

$611

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 12/13

6:00 am-9:00 am

1 stop20h 00m

Rome Fiumicino

Tue 12/23

1:10 pm-8:56 am

1 stop26h 46m

$631

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 10/7

9:43 am-8:05 am

1 stop15h 22m

Rome Fiumicino

Thu 10/16

12:10 pm-11:58 pm

1 stop18h 48m

$665

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 10/8

10:45 am-10:05 am

2 stops16h 20m

Rome Fiumicino

Thu 10/16

9:45 am-5:47 pm

1 stop15h 02m

$670

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 10/13

10:45 am-9:20 am

1 stop15h 35m

Rome Fiumicino

Fri 10/24

2:25 pm-4:43 pm

1 stop33h 18m

$678

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 Fiumicino Airport

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 Fiumicino Airport?

What is the cheapest month to fly to Rome Fiumicino Airport?

The cheapest month to fly to Rome Fiumicino Airport from St. Louis is in January. Flight prices, which tend to average around $709, are often lower during this time because this is during the off-season. If you aren’t able to travel to Rome Fiumicino Airport during the month of January, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $782.

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

Our data shows that Tuesday is the least expensive day to fly to Rome Fiumicino Airport. Tickets to fly out on this day can be as low as $1,037. The most expensive day to fly to Rome Fiumicino Airport is Sunday, with ticket prices averaging around $1,259.

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

According to our data, the cheapest time of day to fly to Rome Fiumicino Airport is in the afternoon. momondo users have found flights departing from St. Louis to Rome Fiumicino Airport in the afternoon for as low as $1,077. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $1,148.

How far in advance should I book a flight to Rome Fiumicino Airport?

You are more likely to see cheaper flights to Rome Fiumicino Airport from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Rome Fiumicino Airport for around $1,034 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Rome Fiumicino Airport from St. Louis for as low as $736 on momondo.

When to book flights from St. Louis to Rome Fiumicino Airport

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

Estimated round-trip price

Cheap St. Louis to Rome Fiumicino Airport (STL to FCO) flight deals and tips

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

Direct flights	None

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

Search flight deals

How far is Lambert-St Louis to Rome Fiumicino by plane?
A flight from Lambert-St Louis to Rome Fiumicino will travel around 5048.2 mi. 12h 00m is a normal flight duration for this route.
When did momondo last update prices for flights from Lambert-St Louis Airport to Rome Fiumicino Airport?
Prices for flights from Lambert-St Louis Airport to Rome Fiumicino Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Rome Fiumicino Airport?
As of September 2025, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to Rome Fiumicino Airport.
How old do you have to be to fly from Lambert-St Louis Airport to Rome Fiumicino Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Rome Fiumicino Airport.
What documentation or ID do you need to fly to Rome Fiumicino Airport?
The travel and health documents you'll need for your trip to Rome Fiumicino Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Rome Fiumicino Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Rome Fiumicino Airport?
Based on momondo bookings for flights between St. Louis and Rome Fiumicino Airport, the leading airline is United Airlines, making up 27% of the total bookings. Other popular airlines include American Airlines with 26%, Delta with 12%, and Air Canada with 10%.

Best airlines flying from St. Louis to Rome Fiumicino Airport

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

Airline	Rating	Free Cancellation	Price
Iberia	PriceFrom $536	Free Cancellation	Rating 7.0 2,925 reviews	Search Iberia flights
United Airlines	PriceFrom $559	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
Delta	PriceFrom $587	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
KLM	PriceFrom $604	Free Cancellation	Rating 7.8 1,386 reviews	Search KLM flights
American Airlines	PriceFrom $665	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Lufthansa	PriceFrom $671	Free Cancellation	Rating 6.8 7,409 reviews	Search Lufthansa flights
Air Canada	PriceFrom $705	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
British Airways	PriceFrom $711	Free Cancellation	Rating 6.7 7,367 reviews	Search British Airways flights

Fiumicino

Civitavecchia

Cassino

Ponza

Gaeta

Pienza

Tivoli

Sperlonga

Ciampino

Orvieto

Montepulciano

Cortona

Ascoli Piceno

Saturnia

Santa Marinella

Grosseto

Anzio

Sabaudia

Terracina

Foligno

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Rome?

Finding the right flight to Rome from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Rome quick and easy, saving you time and money.

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

Flights from St. Louis to Rome with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for St. Louis to Rome flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Rome from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cheap flights from St. Louis to Rome from $278

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 10/4. 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 Fiumicino Airport

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

British Airways flights from St. Louis to Rome Fiumicino Airport

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

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

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

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

What is the cheapest month to fly to Rome Fiumicino Airport?

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

Our data shows that Tuesday is the least expensive day to fly to Rome Fiumicino Airport. Tickets to fly out on this day can be as low as $1,037. The most expensive day to fly to Rome Fiumicino Airport is Sunday, with ticket prices averaging around $1,259.

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

How far in advance should I book a flight to Rome Fiumicino Airport?

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

United Airlines, KLM, and Delta are the most popular carriers operating from Lambert-St Louis to Rome Fiumicino

What airlines fly to Rome Fiumicino Airport?

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

Chicago (ORD) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Atlanta (ATL) offer the lowest average round-trip price of $659.

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

Flights connecting via Philadelphia (PHL) have the shortest average one-way travel time: 11h 13m.

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

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

When to book flights from St. Louis to Rome Fiumicino Airport

Cheap St. Louis to Rome Fiumicino Airport (STL to FCO) flight deals and tips

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

Direct flights

How far is Lambert-St Louis to Rome Fiumicino by plane?

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

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

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

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

What is the most popular airline from St. Louis to Rome Fiumicino Airport?

Best airlines flying from St. Louis to Rome Fiumicino Airport

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

Traveling to a place near Rome?

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Rome?

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

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

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

An easier way to manage your Rome Fiumicino Airport 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 Rome

Popular cities in Italy

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