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

Montreal (YUL) was the most common stop: 60% of momondo users choosing 1-stop flights on this route connected there.

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

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 Fiumicino Airport?

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

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

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

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

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

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 34% 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 October 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.

$330 Cheap Flights from St. Louis to Rome Fiumicino Airport in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Rome

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One-way

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1:18 pm - 7:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

11h 27m1 stop Chicago O'Hare Intl

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

40h 44m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$656United Airlines

Wed, Dec 9 - Wed, Dec 16

9:59 am - 7:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

14h 56m1 stop Newark

11:15 am - 3:43 pmFCO Rome Fiumicino-STL Lambert-St Louis

35h 28m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$661United Airlines

Wed, Nov 18 - Thu, Nov 26

4:05 pm - 10:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

11h 50m1 stop Toronto Pearson Intl

11:15 am - 3:26 pmFCO Rome Fiumicino-STL Lambert-St Louis

35h 11m1 stop Toronto Pearson Intl

$662Multiple Airlines

Tue, Dec 8 - Tue, Dec 15

4:05 pm - 10:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

11h 50m1 stop Toronto Pearson Intl

11:15 am - 7:26 pmFCO Rome Fiumicino-STL Lambert-St Louis

39h 11m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$665Air Canada

Tue, Dec 8 - Tue, Dec 15

6:30 am - 10:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

21h 25m2 stops Chicago O'Hare Intl Toronto Pearson Intl

11:15 am - 10:30 amFCO Rome Fiumicino-STL Lambert-St Louis

30h 15m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$669Air Canada

Tue, Dec 8 - Tue, Dec 15

2:31 pm - 11:20 amSTL Lambert-St Louis-FCO Rome Fiumicino

13h 49m1 stop Atlanta Hartsfield-Jackson

10:00 am - 8:29 pmFCO Rome Fiumicino-STL Lambert-St Louis

17h 29m1 stop Detroit Metropolitan Wayne County

$676Multiple Airlines

Mon, Nov 9 - Wed, Nov 18

1:20 pm - 4:55 pmSTL Lambert-St Louis-FCO Rome Fiumicino

20h 35m2 stops Chicago O'Hare Intl London Heathrow

11:00 am - 8:26 pmFCO Rome Fiumicino-STL Lambert-St Louis

16h 26m1 stop Philadelphia

$683British Airways

Mon, Nov 9 - Wed, Nov 18

6:00 am - 2:55 pmSTL Lambert-St Louis-FCO Rome Fiumicino

25h 55m2 stops Chicago O'Hare Intl London Heathrow

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

15h 49m1 stop Dallas/Fort Worth

$683British Airways

Mon, Nov 9 - Wed, Nov 18

7:03 am - 8:15 amSTL Lambert-St Louis-FCO Rome Fiumicino

18h 12m1 stop Atlanta Hartsfield-Jackson

10:25 am - 9:38 pmFCO Rome Fiumicino-STL Lambert-St Louis

18h 13m1 stop Atlanta Hartsfield-Jackson

$686Delta

Wed, Dec 9 - Wed, Dec 16

6:40 am - 7:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

18h 05m2 stops Detroit Metropolitan Wayne County New York John F Kennedy Intl

10:25 am - 6:13 pmFCO Rome Fiumicino-STL Lambert-St Louis

14h 48m1 stop Atlanta Hartsfield-Jackson

$690Delta

Mon, Nov 9 - Wed, Nov 18

Cheap last minute flights

Enter your travel dates to find the best prices.

4:05 pm - 2:00 pmSTL Lambert-St Louis-FCO Rome Fiumicino

14h 55m2 stops Toronto Pearson Intl Zurich

11:15 am - 7:23 pmFCO Rome Fiumicino-STL Lambert-St Louis

39h 08m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$875Air Canada

Thu, Nov 5 - Mon, Nov 9

9:40 am - 7:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

15h 05m1 stop Chicago O'Hare Intl

11:15 am - 3:43 pmFCO Rome Fiumicino-STL Lambert-St Louis

35h 28m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$875United Airlines

Thu, Nov 5 - Mon, Nov 9

6:50 pm - 7:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

29h 55m1 stop Chicago O'Hare Intl

11:15 am - 3:23 pmFCO Rome Fiumicino-STL Lambert-St Louis

35h 08m1 stop Toronto Pearson Intl

$876Multiple Airlines

Thu, Nov 5 - Mon, Nov 9

4:05 pm - 2:00 pmSTL Lambert-St Louis-FCO Rome Fiumicino

14h 55m2 stops Toronto Pearson Intl Zurich

11:15 am - 3:23 pmFCO Rome Fiumicino-STL Lambert-St Louis

35h 08m1 stop Toronto Pearson Intl

$877Multiple Airlines

Thu, Nov 5 - Mon, Nov 9

1:08 pm - 7:15 pmSTL Lambert-St Louis-FCO Rome Fiumicino

23h 07m2 stops Chicago O'Hare Intl Vienna Intl

8:05 pm - 9:52 pmFCO Rome Fiumicino-STL Lambert-St Louis

32h 47m2 stops Vienna Intl Newark

$970Austrian Airlines

Mon, Nov 2 - Mon, Nov 9

12:58 pm - 10:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

14h 47m1 stop Dallas/Fort Worth

6:40 pm - 8:19 pmFCO Rome Fiumicino-STL Lambert-St Louis

32h 39m2 stops Helsinki-Vantaa Dallas/Fort Worth

$986Finnair

Mon, Nov 2 - Mon, Nov 9

9:59 am - 7:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

14h 56m1 stop Newark

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

18h 55m1 stop Chicago O'Hare Intl

$1,019United Airlines

Mon, Nov 2 - Mon, Nov 9

5:29 pm - 7:25 pmSTL Lambert-St Louis-FCO Rome Fiumicino

18h 56m2 stops Chicago O'Hare Intl London Heathrow

10:40 am - 10:39 pmFCO Rome Fiumicino-STL Lambert-St Louis

18h 59m2 stops London Heathrow Charlotte Douglas

$2,673British Airways

Wed, Nov 4 - Sat, Nov 7

11:29 am - 7:55 amSTL Lambert-St Louis-FCO Rome Fiumicino

13h 26m1 stop Newark

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

18h 55m1 stop Chicago O'Hare Intl

$3,161Lufthansa

Wed, Nov 4 - Sat, Nov 7

8:30 am - 7:45 amSTL Lambert-St Louis-FCO Rome Fiumicino

16h 15m1 stop Chicago O'Hare Intl

12:40 pm - 9:40 pmFCO Rome Fiumicino-STL Lambert-St Louis

16h 00m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$8,925Lufthansa

Wed, Nov 4 - Sat, Nov 7

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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

United Airlines

Dec 9

STL1:18 pmLambert-St Louis

11h 27m

1 stop

FCO7:45 amRome Fiumicino

Dec 16

FCO1:15 pmRome Fiumicino

40h 44m

2 stops

STL10:59 pmLambert-St Louis

$656

United Airlines

Nov 10

STL10:53 amLambert-St Louis

13h 52m

1 stop

FCO7:45 amRome Fiumicino

Jan 12

FCO11:15 amRome Fiumicino

34h 13m

2 stops

STL2:28 pmLambert-St Louis

$661

United Airlines

Nov 10

STL5:34 pmLambert-St Louis

31h 11m

1 stop

FCO7:45 amRome Fiumicino

Jan 12

FCO11:15 amRome Fiumicino

35h 11m

1 stop

STL3:26 pmLambert-St Louis

$662

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

Dec 8

STL4:05 pmLambert-St Louis

11h 50m

1 stop

FCO10:55 amRome Fiumicino

Dec 15

FCO11:15 amRome Fiumicino

39h 11m

2 stops

STL7:26 pmLambert-St Louis

$665

Air Canada

Nov 10

STL9:40 amLambert-St Louis

18h 15m

2 stops

FCO10:55 amRome Fiumicino

Jan 12

FCO11:15 amRome Fiumicino

37h 35m

2 stops

STL5:50 pmLambert-St Louis

$669

Air Canada

Nov 10

STL4:05 pmLambert-St Louis

11h 50m

1 stop

FCO10:55 amRome Fiumicino

Jan 12

FCO11:15 amRome Fiumicino

37h 35m

2 stops

STL5:50 pmLambert-St Louis

$674

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

Cheapest round-trip

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Wed 12/9

1:18 pm-7:45 am

1 stop11h 27m

Rome Fiumicino

Wed 12/16

1:15 pm-10:59 pm

2 stops40h 44m

$656

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Wed 11/18

9:59 am-7:55 am

1 stop14h 56m

Rome Fiumicino

Thu 11/26

11:15 am-3:43 pm

2 stops35h 28m

$661

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Tue 12/8

4:05 pm-10:55 am

1 stop11h 50m

Rome Fiumicino

Tue 12/15

11:15 am-3:26 pm

1 stop35h 11m

$662

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Tue 12/8

4:05 pm-10:55 am

1 stop11h 50m

Rome Fiumicino

Tue 12/15

11:15 am-7:26 pm

2 stops39h 11m

$665

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Tue 12/8

6:30 am-10:55 am

2 stops21h 25m

Rome Fiumicino

Tue 12/15

11:15 am-10:30 am

2 stops30h 15m

$669

Quickest round-trip

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Mon 11/9

2:31 pm-11:20 am

1 stop13h 49m

Rome Fiumicino

Wed 11/18

10:00 am-8:29 pm

1 stop17h 29m

$676

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Mon 11/9

1:20 pm-4:55 pm

2 stops20h 35m

Rome Fiumicino

Wed 11/18

11:00 am-8:26 pm

1 stop16h 26m

$683

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Mon 11/9

6:00 am-2:55 pm

2 stops25h 55m

Rome Fiumicino

Wed 11/18

1:10 pm-9:59 pm

1 stop15h 49m

$683

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Wed 12/9

7:03 am-8:15 am

1 stop18h 12m

Rome Fiumicino

Wed 12/16

10:25 am-9:38 pm

1 stop18h 13m

$686

St. LouisRome

STL Lambert-St Louis - FCO Rome Fiumicino

STLFCO

Lambert-St Louis

Mon 11/9

6:40 am-7:45 am

2 stops18h 05m

Rome Fiumicino

Wed 11/18

10:25 am-6:13 pm

1 stop14h 48m

$690

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?

Prices are currently low for flights on this route.

Typical prices usually range from $726 to $934.
The lowest price recently found on this route was $656.

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 $557, 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 February is also cheap. Prices for this month can be found on momondo for an average of $634.

How far in advance should I book a flight from St. Louis 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 $998 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 $729 on momondo.

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

You could potentially save up to 27% 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

Best Price Found	$330
Fastest flight time	14h 56m
Direct flights	None

The best one-way flight to Rome Fiumicino Airport from St. Louis in the past 72 hours is $330. The best round-trip flight deal from St. Louis to Rome Fiumicino Airport found on momondo in the last 72 hours is $656.

The fastest flight from St. Louis to Rome Fiumicino Airport takes 14h 56m

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

Frequently asked questions about flying from St. Louis to Rome Fiumicino Airport

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. 14h 56m 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 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 United Airlines, making up 26% of the total bookings. Other popular airlines include American Airlines with 22%, Delta with 18%, and British Airways 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 $472	Free Cancellation	Rating 6.7 8,275 reviews	Search British Airways flights
Lufthansa	PriceFrom $500	Free Cancellation	Rating 6.8 8,297 reviews	Search Lufthansa flights
KLM	PriceFrom $506	Free Cancellation	Rating 7.8 1,595 reviews	Search KLM flights
Delta	PriceFrom $596	Free Cancellation	Rating 7.8 8,691 reviews	Search Delta flights
Air Canada	PriceFrom $810	Free Cancellation	Rating 7.1 11,831 reviews	Search Air Canada flights
United Airlines	PriceFrom $851	Free Cancellation	Rating 7.3 10,453 reviews	Search United Airlines flights
American Airlines	PriceFrom $867	Free Cancellation	Rating 7.0 12,209 reviews	Search American Airlines flights

Fiumicino

Civitavecchia

Gaeta

Orvieto

Porto Ercole

Ciampino

Ladispoli

Sperlonga

Pienza

Tivoli

Cassino

Vatican

Montepulciano

Orbetello

Ponza

Anzio

Chianciano Terme

Saturnia

Foligno

Terracina

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 $330

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 3/7. 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

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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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 from St. Louis to Rome Fiumicino Airport?

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

What is the cheapest airline that flies 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?

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

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

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

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying 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?

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An easier way to manage your Rome Fiumicino Airport trip

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