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

Finnair is the most popular carrier operating from Rome to Lambert-St Louis

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

Philadelphia (PHL) was the most common stop: 75% of momondo users choosing 1-stop flights on this route connected there.

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

Toronto (YYZ) has the shortest average layover time for this route: 2h 00m.

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

Flights via Toronto (YYZ) offer the lowest average round-trip price of $832.

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

Flights connecting via Toronto (YYZ) have the shortest average one-way travel time: 14h 13m.

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

Prices for flights from Rome to Lambert-St Louis Airport were last updated today.

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

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$377 Cheap Flights from Rome to St. Louis in 2026

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Find the cheapest flights from Rome to St. Louis

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7:00 am - 5:44 pm

FCO

STL

17h 44m

2 stops

8:17 am - 7:55 am

STL

FCO

16h 38m

2 stops

$794United Airlines

Wed, Feb 18 - Sun, Feb 22

11:00 am - 8:23 pm

FCO

STL

16h 23m

1 stop

12:15 pm - 8:30 am

STL

FCO

13h 15m

1 stop

$797Lufthansa

Wed, Feb 18 - Sun, Feb 22

7:00 am - 9:05 pm

FCO

STL

21h 05m

3 stops

4:05 pm - 12:40 pm

STL

FCO

37h 35m

2 stops

$815Multiple Airlines

Wed, Feb 18 - Sun, Feb 22

9:00 am - 5:16 pm

FCO

STL

15h 16m

1 stop

6:20 am - 12:45 pm

STL

FCO

23h 25m

1 stop

$927Delta

Fri, May 15 - Wed, May 20

11:10 am - 11:48 pm

FCO

STL

19h 38m

2 stops

12:11 pm - 7:55 pm

STL

FCO

24h 44m

2 stops

$1,034Aer Lingus

Fri, May 15 - Wed, May 20

12:30 pm - 8:31 pm

FCO

STL

15h 01m

2 stops

7:30 am - 11:25 am

STL

FCO

20h 55m

2 stops

$1,063Multiple Airlines

Fri, May 15 - Wed, May 20

2:45 pm - 11:01 pm

FCO

STL

15h 16m

1 stop

7:30 am - 11:25 am

STL

FCO

20h 55m

2 stops

$1,064Multiple Airlines

Fri, May 15 - Wed, May 20

1:35 pm - 12:06 pm

FCO

STL

29h 31m

3 stops

7:30 am - 9:15 am

STL

FCO

18h 45m

2 stops

$1,659Multiple Airlines

Fri, May 15 - Wed, May 20

Fly from

Fly to

Route

Depart

Return

Price

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 2/18

7:00 am-5:44 pm

2 stops17h 44m

Lambert-St Louis

Sun 2/22

8:17 am-7:55 am

2 stops16h 38m

$794

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 2/18

11:00 am-8:23 pm

1 stop16h 23m

Lambert-St Louis

Sun 2/22

12:15 pm-8:30 am

1 stop13h 15m

$797

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 2/18

7:00 am-9:05 pm

3 stops21h 05m

Lambert-St Louis

Sun 2/22

4:05 pm-12:40 pm

2 stops37h 35m

$815

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 5/15

9:00 am-5:16 pm

1 stop15h 16m

Lambert-St Louis

Wed 5/20

6:20 am-12:45 pm

1 stop23h 25m

$927

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 5/15

11:10 am-11:48 pm

2 stops19h 38m

Lambert-St Louis

Wed 5/20

12:11 pm-7:55 pm

2 stops24h 44m

$1,034

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 5/15

12:30 pm-8:31 pm

2 stops15h 01m

Lambert-St Louis

Wed 5/20

7:30 am-11:25 am

2 stops20h 55m

$1,063

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 5/15

2:45 pm-11:01 pm

1 stop15h 16m

Lambert-St Louis

Wed 5/20

7:30 am-11:25 am

2 stops20h 55m

$1,064

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 5/15

1:35 pm-12:06 pm

3 stops29h 31m

Lambert-St Louis

Wed 5/20

7:30 am-9:15 am

2 stops18h 45m

$1,659

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Mon 4/20

7:05 pm-6:50 am

2 stops42h 45m

$344

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Mon 4/20

7:05 pm-11:19 pm

3 stops35h 14m

$403

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first

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

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

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

You could potentially save up to 3% on your flight if you consider stops on a Rome to St. Louis flight.

How have Rome to St. Louis flight prices changed over time?

As of February 2026, prices for Rome to St. Louis flights are approximately 136% more expensive when compared to flights at the same time last year.

When to book flights from Rome to St. Louis

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

Estimated round-trip price

Cheap Rome to St. Louis (ROM to STL) flight deals and tips

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

Fastest flight time	15h 16m
Direct flights	None

The fastest flight from Rome to St. Louis takes 15h 16m

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

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How far is Rome to Lambert-St Louis by plane?
The distance between Rome and Lambert-St Louis is about 5053.3 mi. 15h 16m is a normal flight duration for this route.
When did momondo last update prices for flights from Rome to Lambert-St Louis Airport?
Prices for flights from Rome to Lambert-St Louis Airport were last updated today.
How old do you have to be to fly from Rome to Lambert-St Louis 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 Rome to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

Florissant

O'Fallon

Collinsville

St. Peters

Fenton

Wentzville

Alton

Farmington

Clayton

Edwardsville

Eureka

Festus

Litchfield

Glencoe

Shrewsbury

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

Finding the right flight to St. Louis from Rome 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 St. Louis quick and easy, saving you time and money.

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

All flight searches from Rome to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Rome and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Price alerts on flights to St. Louis from Rome 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.