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Cheap flights from Rome Fiumicino Airport to St. Louis from $530

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 Fiumicino Airport to St. Louis departing on 4/15. 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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Find the cheapest flights from Rome Fiumicino Airport to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
12:20 pm - 9:40 pm
FCO
-
STL
16h 20m
2 stops
Lufthansa Logo
6:55 pm - 7:45 am
STL
-
FCO
29h 50m
1 stop
$836Lufthansa
Wed, Feb 25 - Sun, Mar 1
Lufthansa Logo
7:00 am - 5:44 pm
FCO
-
STL
17h 44m
2 stops
Lufthansa Logo
3:50 pm - 12:40 pm
STL
-
FCO
13h 50m
1 stop
$846Lufthansa
Wed, Feb 25 - Sun, Mar 1
Air Canada Logo
9:45 am - 3:29 pm
FCO
-
STL
36h 44m
2 stops
Air Canada Logo
4:05 pm - 8:40 am
STL
-
FCO
33h 35m
2 stops
$852Air Canada
Wed, Feb 25 - Sun, Mar 1
Air Canada Logo
7:05 am - 3:29 pm
FCO
-
STL
39h 24m
2 stops
Air Canada Logo
4:05 pm - 8:40 am
STL
-
FCO
34h 35m
2 stops
$854Air Canada
Thu, Mar 5 - Sun, Mar 15
Lufthansa Logo
9:45 am - 5:44 pm
FCO
-
STL
14h 59m
1 stop
Lufthansa Logo
6:55 pm - 7:45 am
STL
-
FCO
29h 50m
1 stop
$855Lufthansa
Wed, Feb 25 - Sun, Mar 1
United Airlines Logo
9:45 am - 9:40 pm
FCO
-
STL
18h 55m
2 stops
United Airlines Logo
6:55 pm - 7:45 am
STL
-
FCO
29h 50m
1 stop
$856United Airlines
Wed, Feb 25 - Sun, Mar 1
United Airlines Logo
9:40 am - 4:59 pm
FCO
-
STL
38h 19m
2 stops
United Airlines Logo
3:23 pm - 7:45 am
STL
-
FCO
34h 22m
1 stop
$860United Airlines
Thu, Mar 5 - Sun, Mar 15
American Airlines Logo
1:10 pm - 11:04 pm
FCO
-
STL
16h 54m
1 stop
American Airlines Logo
6:57 pm - 5:50 pm
STL
-
FCO
15h 53m
2 stops
$862American Airlines
Wed, Feb 25 - Sun, Mar 1
Lufthansa Logo
9:45 am - 9:40 pm
FCO
-
STL
18h 55m
1 stop
Lufthansa Logo
1:11 pm - 7:45 am
STL
-
FCO
11h 34m
1 stop
$865Lufthansa
Wed, Feb 25 - Sun, Mar 1
American Airlines Logo
1:10 pm - 11:04 pm
FCO
-
STL
16h 54m
1 stop
American Airlines Logo
6:57 pm - 5:50 pm
STL
-
FCO
15h 53m
2 stops
$866American Airlines
Wed, Feb 25 - Sun, Mar 1

American Airlines flights from Rome Fiumicino Airport to St. Louis

Our best American Airlines deals on Rome Fiumicino Airport to St. Louis flight tickets
American Airlines
Feb 25
FCO1:10 pmRome Fiumicino
16h 54m
1 stop
STL11:04 pmLambert-St Louis
Mar 1
STL6:57 pmLambert-St Louis
15h 53m
2 stops
FCO5:50 pmRome Fiumicino
$862
American Airlines
Feb 25
FCO1:10 pmRome Fiumicino
16h 54m
1 stop
STL11:04 pmLambert-St Louis
Mar 1
STL6:57 pmLambert-St Louis
15h 53m
2 stops
FCO5:50 pmRome Fiumicino
$866
American Airlines
Feb 25
FCO1:10 pmRome Fiumicino
16h 54m
1 stop
STL11:04 pmLambert-St Louis
Mar 1
STL2:00 pmLambert-St Louis
12h 00m
1 stop
FCO9:00 amRome Fiumicino
$877

British Airways flights from Rome Fiumicino Airport to St. Louis

Our best British Airways deals on Rome Fiumicino Airport to St. Louis flight tickets
British Airways
May 15
FCO12:00 pmRome Fiumicino
14h 30m
1 stop
STL7:30 pmLambert-St Louis
May 20
STL9:35 pmLambert-St Louis
30h 30m
1 stop
FCO11:05 amRome Fiumicino
$1,077
British Airways
May 17
FCO7:10 amRome Fiumicino
19h 20m
1 stop
STL7:30 pmLambert-St Louis
May 21
STL11:18 amLambert-St Louis
12h 47m
1 stop
FCO7:05 amRome Fiumicino
$1,447

momondo Fare Finder

 
Customize your flight search to find flights from Rome Fiumicino Airport 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 February 12, 2026.
Use the filters below to find and compare flights from Rome Fiumicino Airport to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 2/25

12:20 pm-9:40 pm

2 stops16h 20m

Lambert-St Louis

Sun 3/1

6:55 pm-7:45 am

1 stop29h 50m

$836

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 2/25

7:00 am-5:44 pm

2 stops17h 44m

Lambert-St Louis

Sun 3/1

3:50 pm-12:40 pm

1 stop13h 50m

$846

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 2/25

9:45 am-3:29 pm

2 stops36h 44m

Lambert-St Louis

Sun 3/1

4:05 pm-8:40 am

2 stops33h 35m

$852

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 3/5

7:05 am-3:29 pm

2 stops39h 24m

Lambert-St Louis

Sun 3/15

4:05 pm-8:40 am

2 stops34h 35m

$854

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 2/25

9:45 am-5:44 pm

1 stop14h 59m

Lambert-St Louis

Sun 3/1

6:55 pm-7:45 am

1 stop29h 50m

$855

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 2/25

9:45 am-9:40 pm

2 stops18h 55m

Lambert-St Louis

Sun 3/1

6:55 pm-7:45 am

1 stop29h 50m

$856

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 3/5

9:40 am-4:59 pm

2 stops38h 19m

Lambert-St Louis

Sun 3/15

3:23 pm-7:45 am

1 stop34h 22m

$860

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 2/25

1:10 pm-11:04 pm

1 stop16h 54m

Lambert-St Louis

Sun 3/1

6:57 pm-5:50 pm

2 stops15h 53m

$862

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 2/25

9:45 am-9:40 pm

1 stop18h 55m

Lambert-St Louis

Sun 3/1

1:11 pm-7:45 am

1 stop11h 34m

$865

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 2/25

1:10 pm-11:04 pm

1 stop16h 54m

Lambert-St Louis

Sun 3/1

6:57 pm-5:50 pm

2 stops15h 53m

$866

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 Fiumicino Airport 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

What is the cheapest month to fly to St. Louis?

In general, April is the cheapest month to fly from Rome Fiumicino Airport to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $793. The month of February is another great option to travel to St. Louis, with average flight prices from Rome Fiumicino Airport averaging around $810.

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

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

When to book flights from Rome Fiumicino Airport to St. Louis

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

Cheap Rome Fiumicino Airport to St. Louis (FCO to STL) flight deals and tips

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

Fastest flight time

14h 30m

Direct flights

None
The fastest flight from Rome Fiumicino Airport to St. Louis takes 14h 30m
There are no direct flights from Rome Fiumicino Airport to St. Louis. There are no popular flight routes from Rome Fiumicino Airport to St. Louis.
Search flight deals

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

    The straight-line distance from Rome Fiumicino to Lambert-St Louis is 5048.2 mi. Flights usually cover this in 14h 30m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Rome Fiumicino Airport to Lambert-St Louis Airport are updated daily.

  • How old do you have to be to fly from Rome Fiumicino Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Rome Fiumicino Airport to Lambert-St Louis Airport.

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

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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
Maryland Heights
Florissant
O'Fallon
Collinsville
St. Peters
Fenton
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
Shrewsbury

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to St. Louis from Rome.

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

Yes. momondo enables you to select and highlight flights to St. Louis from Rome with this policy.

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

momondo provides multiple filters to help you find the best flight to St. Louis from Rome. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Rome to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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