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 $640.

What airlines fly to Rome Fiumicino Airport?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Rome Fiumicino Airport from St. Louis according to our data. American Airlines is the first choice among our users, with 37% 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?

Lufthansa, American Airlines, and British Airways 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.

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

Chicago (ORD) was the most common stop: 44% of momondo users choosing 1-stop flights on this route connected there.

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 October 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.

$255 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 $729 to $1,074. The lowest price recently found on this route was $483.

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

1:00 pm - 7:45 amSTL-FCO

11h 45m1 stop

1:10 pm - 2:25 pmFCO-STL

32h 15m2 stops

$483United Airlines

Find Deal

Fri, Dec 5 - Fri, Dec 12

8:05 am - 9:25 amSTL-FCO

18h 20m2 stops

12:50 pm - 2:30 pmFCO-STL

32h 40m2 stops

$490United Airlines

Find Deal

Tue, Jan 13 - Thu, Jan 22

9:57 am - 9:25 amSTL-FCO

16h 28m2 stops

12:50 pm - 3:29 pmFCO-STL

33h 39m1 stop

$503Air Canada

Find Deal

Tue, Jan 13 - Thu, Jan 22

11:04 am - 7:55 amSTL-FCO

13h 51m1 stop

10:05 am - 5:56 pmFCO-STL

14h 51m1 stop

$506KLM

Find Deal

Fri, Nov 28 - Fri, Dec 5

11:04 am - 7:55 amSTL-FCO

13h 51m1 stop

6:10 am - 4:06 pmFCO-STL

16h 56m2 stops

$507KLM

Find Deal

Fri, Nov 28 - Fri, Dec 5

5:56 pm - 10:45 pmSTL-FCO

21h 49m2 stops

12:40 pm - 8:39 pmFCO-STL

14h 59m1 stop

$510Delta

Find Deal

Tue, Jan 13 - Thu, Jan 22

10:19 am - 11:45 amSTL-FCO

18h 26m2 stops

6:10 am - 11:39 pmFCO-STL

24h 29m2 stops

$511Delta

Find Deal

Tue, Jan 13 - Thu, Jan 22

4:05 pm - 10:55 amSTL-FCO

11h 50m1 stop

12:50 pm - 2:30 pmFCO-STL

32h 40m2 stops

$541Air Canada

Find Deal

Mon, Jan 19 - Thu, Jan 29

6:35 pm - 11:00 pmSTL-FCO

21h 25m2 stops

7:05 pm - 11:59 pmFCO-STL

35h 54m2 stops

$562Lufthansa

Find Deal

Wed, Dec 31 - Sun, Jan 11

3:50 pm - 12:40 pmSTL-FCO

13h 50m1 stop

10:30 am - 11:59 pmFCO-STL

20h 29m1 stop

$581Lufthansa

Find Deal

Wed, Dec 31 - Wed, Jan 14

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

Dec 5

STL1:00 pmLambert-St Louis

11h 45m

1 stop

FCO7:45 amRome Fiumicino

Dec 12

FCO1:10 pmRome Fiumicino

32h 15m

2 stops

STL2:25 pmLambert-St Louis

$483

Find similar

United Airlines

Jan 13

STL8:05 amLambert-St Louis

18h 20m

2 stops

FCO9:25 amRome Fiumicino

Jan 22

FCO12:50 pmRome Fiumicino

32h 40m

2 stops

STL2:30 pmLambert-St Louis

$490

Find similar

United Airlines

Jan 7

STL11:20 amLambert-St Louis

23h 55m

2 stops

FCO6:15 pmRome Fiumicino

Jan 15

FCO12:50 pmRome Fiumicino

35h 53m

2 stops

STL5:43 pmLambert-St Louis

$497

Find similar

Air Canada flights from St. Louis to Rome Fiumicino Airport

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

Air Canada

Jan 13

STL9:57 amLambert-St Louis

16h 28m

2 stops

FCO9:25 amRome Fiumicino

Jan 22

FCO12:50 pmRome Fiumicino

33h 39m

1 stop

STL3:29 pmLambert-St Louis

$503

Find similar

Air Canada

Jan 19

STL4:05 pmLambert-St Louis

11h 50m

1 stop

FCO10:55 amRome Fiumicino

Jan 29

FCO12:50 pmRome Fiumicino

32h 40m

2 stops

STL2:30 pmLambert-St Louis

$541

Find similar

Air Canada

Jan 13

STL9:57 amLambert-St Louis

16h 28m

2 stops

FCO9:25 amRome Fiumicino

Jan 22

FCO12:50 pmRome Fiumicino

33h 39m

1 stop

STL3:29 pmLambert-St Louis

$547

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

Fri 12/5

1:00 pm-7:45 am

1 stop11h 45m

Rome Fiumicino

Fri 12/12

1:10 pm-2:25 pm

2 stops32h 15m

$483

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 1/13

8:05 am-9:25 am

2 stops18h 20m

Rome Fiumicino

Thu 1/22

12:50 pm-2:30 pm

2 stops32h 40m

$490

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 1/13

9:57 am-9:25 am

2 stops16h 28m

Rome Fiumicino

Thu 1/22

12:50 pm-3:29 pm

1 stop33h 39m

$503

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Fri 11/28

11:04 am-7:55 am

1 stop13h 51m

Rome Fiumicino

Fri 12/5

10:05 am-5:56 pm

1 stop14h 51m

$506

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Fri 11/28

11:04 am-7:55 am

1 stop13h 51m

Rome Fiumicino

Fri 12/5

6:10 am-4:06 pm

2 stops16h 56m

$507

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 1/13

5:56 pm-10:45 pm

2 stops21h 49m

Rome Fiumicino

Thu 1/22

12:40 pm-8:39 pm

1 stop14h 59m

$510

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 1/13

10:19 am-11:45 am

2 stops18h 26m

Rome Fiumicino

Thu 1/22

6:10 am-11:39 pm

2 stops24h 29m

$511

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 1/19

4:05 pm-10:55 am

1 stop11h 50m

Rome Fiumicino

Thu 1/29

12:50 pm-2:30 pm

2 stops32h 40m

$541

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 12/31

6:35 pm-11:00 pm

2 stops21h 25m

Rome Fiumicino

Sun 1/11

7:05 pm-11:59 pm

2 stops35h 54m

$562

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 12/31

3:50 pm-12:40 pm

1 stop13h 50m

Rome Fiumicino

Wed 1/14

10:30 am-11:59 pm

1 stop20h 29m

$581

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 $729, 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 $751.

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 $1,026 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 $718 on momondo.

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

You could potentially save up to 20% on your flight if you consider stops on a St. Louis to Rome Fiumicino Airport flight.

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. 11h 45m 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 October 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 American Airlines, making up 28% of the total bookings. Other popular airlines include United Airlines with 26%, Delta with 12%, and Air Canada with 11%.

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 3,003 reviews	Search Iberia flights
United Airlines	PriceFrom $549	Free Cancellation	Rating 7.4 8,998 reviews	Search United Airlines flights
KLM	PriceFrom $566	Free Cancellation	Rating 7.7 1,406 reviews	Search KLM flights
Delta	PriceFrom $587	Free Cancellation	Rating 7.9 7,997 reviews	Search Delta flights
American Airlines	PriceFrom $665	Free Cancellation	Rating 7.2 11,035 reviews	Search American Airlines flights
Lufthansa	PriceFrom $671	Free Cancellation	Rating 6.8 7,541 reviews	Search Lufthansa flights
Air Canada	PriceFrom $705	Free Cancellation	Rating 7.1 10,380 reviews	Search Air Canada flights
British Airways	PriceFrom $711	Free Cancellation	Rating 6.7 7,487 reviews	Search British Airways flights

Fiumicino

Civitavecchia

Cassino

Pienza

Ponza

Gaeta

Tivoli

Montepulciano

Sperlonga

Orvieto

Cortona

Terracina

Ascoli Piceno

Ciampino

Santa Marinella

Grosseto

Chianciano Terme

Sabaudia

Saturnia

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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Flights to Rome Ciampino Airportfrom $469

Cheap flights from St. Louis to Rome from $255

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 1/18. 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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Filter for what you want

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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

Air Canada flights from St. Louis to Rome Fiumicino Airport

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

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

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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?

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

You could potentially save up to 20% on your flight if you consider stops on a St. Louis to Rome Fiumicino Airport flight.

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

Lufthansa, American Airlines, and British Airways 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: 44% 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 $640.

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