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Cheap flights from Rome to St. Louis from $407

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Rome to St. Louis departing on 4/20. 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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0 bags

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Find the cheapest flights from Rome to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
10:00 am - 6:00 pm
FCO
-
STL
15h 00m
1 stop
American Airlines Logo
6:33 pm - 5:25 pm
STL
-
FCO
15h 52m
2 stops
$900American Airlines
Thu, Apr 2 - Mon, Apr 6
British Airways Logo
1:10 pm - 10:58 pm
FCO
-
STL
16h 48m
1 stop
British Airways Logo
6:33 pm - 5:25 pm
STL
-
FCO
15h 52m
2 stops
$902British Airways
Thu, Apr 2 - Mon, Apr 6
American Airlines Logo
12:15 pm - 11:02 pm
FCO
-
STL
17h 47m
1 stop
American Airlines Logo
9:15 am - 9:50 am
STL
-
FCO
17h 35m
1 stop
$910American Airlines
Thu, Apr 2 - Mon, Apr 6
American Airlines Logo
10:00 am - 9:11 pm
FCO
-
STL
18h 11m
1 stop
American Airlines Logo
8:00 am - 9:10 am
STL
-
FCO
18h 10m
1 stop
$911American Airlines
Thu, Apr 2 - Mon, Apr 6
United Airlines Logo
6:50 am - 9:13 pm
FCO
-
STL
21h 23m
2 stops
United Airlines Logo
7:45 am - 8:15 am
STL
-
FCO
17h 30m
2 stops
$917United Airlines
Mon, May 4 - Mon, May 11
United Airlines Logo
6:50 am - 9:13 pm
FCO
-
STL
21h 23m
2 stops
United Airlines Logo
1:05 pm - 9:15 am
STL
-
FCO
13h 10m
1 stop
$920United Airlines
Mon, May 4 - Mon, May 11
Air Canada Logo
11:30 am - 8:25 pm
FCO
-
STL
15h 55m
1 stop
Air Canada Logo
1:05 pm - 11:45 am
STL
-
FCO
15h 40m
1 stop
$922Air Canada
Thu, May 7 - Tue, May 12
Delta Logo
6:30 am - 2:24 pm
FCO
-
STL
14h 54m
2 stops
Delta Logo
6:32 am - 7:55 am
STL
-
FCO
18h 23m
2 stops
$926Delta
Thu, Apr 2 - Mon, Apr 6
United Airlines Logo
11:30 am - 8:25 pm
FCO
-
STL
15h 55m
1 stop
United Airlines Logo
1:05 pm - 9:15 am
STL
-
FCO
13h 10m
1 stop
$935United Airlines
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
11:30 am - 8:25 pm
FCO
-
STL
15h 55m
1 stop
Multiple Airlines Logo
1:05 pm - 5:10 pm
STL
-
FCO
21h 05m
2 stops
$943Multiple Airlines
Thu, May 7 - Thu, May 14

American Airlines flights from Rome to St. Louis

Our best American Airlines deals on Rome to St. Louis flight tickets
American Airlines
Apr 2
FCO10:00 amRome Fiumicino
15h 00m
1 stop
STL6:00 pmLambert-St Louis
Apr 6
STL6:33 pmLambert-St Louis
15h 52m
2 stops
FCO5:25 pmRome Fiumicino
$900
American Airlines
Apr 2
FCO12:15 pmRome Fiumicino
17h 47m
1 stop
STL11:02 pmLambert-St Louis
Apr 6
STL9:15 amLambert-St Louis
17h 35m
1 stop
FCO9:50 amRome Fiumicino
$910
American Airlines
Apr 2
FCO10:00 amRome Fiumicino
18h 11m
1 stop
STL9:11 pmLambert-St Louis
Apr 6
STL8:00 amLambert-St Louis
18h 10m
1 stop
FCO9:10 amRome Fiumicino
$911

British Airways flights from Rome to St. Louis

Our best British Airways deals on Rome to St. Louis flight tickets
British Airways
Apr 2
FCO1:10 pmRome Fiumicino
16h 48m
1 stop
STL10:58 pmLambert-St Louis
Apr 6
STL6:33 pmLambert-St Louis
15h 52m
2 stops
FCO5:25 pmRome Fiumicino
$902
British Airways
Jul 15
FCO12:15 pmRome Fiumicino
18h 17m
1 stop
STL11:32 pmLambert-St Louis
Nov 6
STL2:50 pmLambert-St Louis
14h 35m
2 stops
FCO12:25 pmRome Fiumicino
$988
British Airways
Mar 25
FCO7:50 amRome Fiumicino
19h 21m
2 stops
STL9:11 pmLambert-St Louis
May 2
STL4:30 pmLambert-St Louis
14h 50m
2 stops
FCO2:20 pmRome Fiumicino
$1,040

momondo Fare Finder

 
Customize your flight search to find flights from Rome to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 23, 2026.
Use the filters below to find and compare flights from Rome to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 4/2

10:00 am-6:00 pm

1 stop15h 00m

Lambert-St Louis

Mon 4/6

6:33 pm-5:25 pm

2 stops15h 52m

$900

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 4/2

1:10 pm-10:58 pm

1 stop16h 48m

Lambert-St Louis

Mon 4/6

6:33 pm-5:25 pm

2 stops15h 52m

$902

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 4/2

12:15 pm-11:02 pm

1 stop17h 47m

Lambert-St Louis

Mon 4/6

9:15 am-9:50 am

1 stop17h 35m

$910

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 4/2

10:00 am-9:11 pm

1 stop18h 11m

Lambert-St Louis

Mon 4/6

8:00 am-9:10 am

1 stop18h 10m

$911

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Mon 5/4

6:50 am-9:13 pm

2 stops21h 23m

Lambert-St Louis

Mon 5/11

7:45 am-8:15 am

2 stops17h 30m

$917

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Mon 5/4

6:50 am-9:13 pm

2 stops21h 23m

Lambert-St Louis

Mon 5/11

1:05 pm-9:15 am

1 stop13h 10m

$920

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 5/7

11:30 am-8:25 pm

1 stop15h 55m

Lambert-St Louis

Tue 5/12

1:05 pm-11:45 am

1 stop15h 40m

$922

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 4/2

6:30 am-2:24 pm

2 stops14h 54m

Lambert-St Louis

Mon 4/6

6:32 am-7:55 am

2 stops18h 23m

$926
Quickest round-trip

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Mon 5/4

11:30 am-8:25 pm

1 stop15h 55m

Lambert-St Louis

Mon 5/11

1:05 pm-9:15 am

1 stop13h 10m

$935

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 5/7

11:30 am-8:25 pm

1 stop15h 55m

Lambert-St Louis

Thu 5/14

1:05 pm-5:10 pm

2 stops21h 05m

$943

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

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

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

You could potentially save up to 15% 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 March 2026, prices for Rome to St. Louis flights are approximately 7% cheaper 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 55m

Direct flights

None
The fastest flight from Rome to St. Louis takes 15h 55m
There are no direct flights from Rome to St. Louis. There are no popular flight routes from Rome to St. Louis.
Search flight deals

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

    The distance between Rome and Lambert-St Louis is about 5053.3 mi. 15h 55m 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.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Collinsville
St. Peters
Wentzville
Alton
Fenton
Farmington
Clayton
Festus
Edwardsville
Eureka
Litchfield
Shrewsbury
Grafton

Why use momondo?

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.

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