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

Air Canada and United Airlines are the most popular carriers operating from Lambert-St Louis to Rome Fiumicino

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.

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: 27% 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 $549.

What airlines fly to Rome Fiumicino Airport?

American Airlines, United Airlines and Air Canada 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 7 different airlines that fly to Rome Fiumicino Airport 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 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 January 2026, there are 7 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.

$436 Cheap Flights from St. Louis to Rome Fiumicino Airport in 2026

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 $523 to $730. The lowest price recently found on this route was $479.

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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.

4:05 pm - 11:05 am

STL

FCO

12h 00m

1 stop

7:05 am - 1:55 pm

FCO

STL

13h 50m

1 stop

$479Multiple Airlines

mié., feb. 25 - vie., mar. 6

6:55 pm - 6:15 pm

STL

FCO

16h 20m

2 stops

7:05 am - 1:55 pm

FCO

STL

13h 50m

1 stop

$485Lufthansa

dom., feb. 22 - dom., mar. 1

6:55 pm - 7:45 am

STL

FCO

29h 50m

1 stop

11:15 am - 3:29 pm

FCO

STL

35h 14m

1 stop

$488United Airlines

lun., feb. 23 - lun., mar. 2

9:55 am - 8:30 am

STL

FCO

15h 35m

2 stops

1:15 pm - 2:42 pm

FCO

STL

32h 27m

2 stops

$492United Airlines

mié., feb. 25 - mié., mar. 4

9:55 am - 7:45 am

STL

FCO

14h 50m

1 stop

11:15 am - 9:05 pm

FCO

STL

40h 50m

2 stops

$493United Airlines

lun., feb. 23 - lun., mar. 2

6:55 pm - 6:15 pm

STL

FCO

16h 20m

2 stops

7:05 am - 10:59 pm

FCO

STL

22h 54m

2 stops

$494Lufthansa

lun., feb. 23 - lun., mar. 2

4:30 pm - 8:55 am

STL

FCO

33h 25m

2 stops

12:10 pm - 11:51 pm

FCO

STL

41h 41m

2 stops

$496United Airlines

mar., mar. 3 - mar., mar. 10

7:41 am - 11:05 am

STL

FCO

20h 24m

2 stops

7:05 am - 1:55 pm

FCO

STL

13h 50m

1 stop

$500Multiple Airlines

mié., feb. 25 - vie., mar. 6

12:15 pm - 8:30 am

STL

FCO

13h 15m

1 stop

1:30 pm - 3:29 pm

FCO

STL

32h 59m

2 stops

$504United Airlines

mar., feb. 24 - mar., mar. 3

7:41 am - 11:05 am

STL

FCO

20h 24m

2 stops

1:35 pm - 10:59 pm

FCO

STL

16h 24m

2 stops

$506Multiple Airlines

mié., feb. 25 - vie., mar. 6

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

Mar 22

STL2:00 pmLambert-St Louis

16h 25m

2 stops

FCO12:25 pmRome Fiumicino

Apr 1

FCO10:00 amRome Fiumicino

18h 11m

1 stop

STL9:11 pmLambert-St Louis

$589

British Airways

Apr 15

STL1:29 pmLambert-St Louis

18h 46m

2 stops

FCO3:15 pmRome Fiumicino

Apr 30

FCO10:00 amRome Fiumicino

20h 48m

1 stop

STL11:48 pmLambert-St Louis

$640

British Airways

Apr 15

STL1:29 pmLambert-St Louis

18h 46m

2 stops

FCO3:15 pmRome Fiumicino

Apr 30

FCO11:10 amRome Fiumicino

19h 38m

2 stops

STL11:48 pmLambert-St Louis

$653

KLM flights from St. Louis to Rome Fiumicino Airport

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

KLM

Feb 24

STL6:00 amLambert-St Louis

21h 30m

1 stop

FCO10:30 amRome Fiumicino

Mar 3

FCO12:40 pmRome Fiumicino

17h 56m

1 stop

STL11:36 pmLambert-St Louis

$508

KLM

Mar 10

STL1:39 pmLambert-St Louis

11h 16m

1 stop

FCO6:55 amRome Fiumicino

Mar 17

FCO9:05 amRome Fiumicino

17h 37m

1 stop

STL8:42 pmLambert-St Louis

$600

KLM

Mar 9

STL7:03 amLambert-St Louis

17h 52m

1 stop

FCO6:55 amRome Fiumicino

Mar 16

FCO9:05 amRome Fiumicino

18h 01m

1 stop

STL9:06 pmLambert-St Louis

$608

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

mié. 2/25

4:05 pm-11:05 am

1 stop12h 00m

Rome Fiumicino

vie. 3/6

7:05 am-1:55 pm

1 stop13h 50m

$479

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

dom. 2/22

6:55 pm-6:15 pm

2 stops16h 20m

Rome Fiumicino

dom. 3/1

7:05 am-1:55 pm

1 stop13h 50m

$485

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

lun. 2/23

6:55 pm-7:45 am

1 stop29h 50m

Rome Fiumicino

lun. 3/2

11:15 am-3:29 pm

1 stop35h 14m

$488

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

mié. 2/25

9:55 am-8:30 am

2 stops15h 35m

Rome Fiumicino

mié. 3/4

1:15 pm-2:42 pm

2 stops32h 27m

$492

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

lun. 2/23

9:55 am-7:45 am

1 stop14h 50m

Rome Fiumicino

lun. 3/2

11:15 am-9:05 pm

2 stops40h 50m

$493

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

lun. 2/23

6:55 pm-6:15 pm

2 stops16h 20m

Rome Fiumicino

lun. 3/2

7:05 am-10:59 pm

2 stops22h 54m

$494

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

mar. 3/3

4:30 pm-8:55 am

2 stops33h 25m

Rome Fiumicino

mar. 3/10

12:10 pm-11:51 pm

2 stops41h 41m

$496

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

mié. 2/25

7:41 am-11:05 am

2 stops20h 24m

Rome Fiumicino

vie. 3/6

7:05 am-1:55 pm

1 stop13h 50m

$500

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

mar. 2/24

12:15 pm-8:30 am

1 stop13h 15m

Rome Fiumicino

mar. 3/3

1:30 pm-3:29 pm

2 stops32h 59m

$504

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

mié. 2/25

7:41 am-11:05 am

2 stops20h 24m

Rome Fiumicino

vie. 3/6

1:35 pm-10:59 pm

2 stops16h 24m

$506

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 February. Flight prices, which tend to average around $634, 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 February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $643.

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 $946 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 $731 on momondo.

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

You could potentially save up to 16% 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

Fastest flight time	11h 50m
Direct flights	None

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

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 50m 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 January 2026, there are 7 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 25%, Air Canada with 12%, and Delta with 12%.

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
British Airways	PriceFrom $481	Free Cancellation	Rating 6.7 7,701 reviews	Search British Airways flights
Lufthansa	PriceFrom $506	Free Cancellation	Rating 6.8 7,747 reviews	Search Lufthansa flights
KLM	PriceFrom $506	Free Cancellation	Rating 7.7 1,443 reviews	Search KLM flights
United Airlines	PriceFrom $549	Free Cancellation	Rating 7.4 9,199 reviews	Search United Airlines flights
Delta	PriceFrom $566	Free Cancellation	Rating 7.9 8,113 reviews	Search Delta flights
American Airlines	PriceFrom $665	Free Cancellation	Rating 7.2 11,188 reviews	Search American Airlines flights
Air Canada	PriceFrom $705	Free Cancellation	Rating 7.1 10,656 reviews	Search Air Canada flights

Fiumicino

Civitavecchia

Cassino

Pienza

Montepulciano

Ponza

Tivoli

Sperlonga

Gaeta

Orvieto

Chianciano Terme

Cortona

Terracina

Ciampino

Grosseto

Sabaudia

Santa Marinella

Ascoli Piceno

Saturnia

Orbetello

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.

An easier way to manage your Rome Fiumicino Airport trip

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mié. 3/4

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Cheap flights from St. Louis to Rome from $460

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 1/29. 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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British Airways flights from St. Louis to Rome Fiumicino Airport

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

KLM flights from St. Louis to Rome Fiumicino Airport

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

momondo Fare Finder

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

See travel insights to Rome from

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

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?

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 16% 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?

Air Canada and United Airlines 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: 27% 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 $549.

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

Fastest flight time

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