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Cheap flights from Rome Fiumicino Airport to St. Louis from $420

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 6/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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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.
Finnair Logo
10:00 am - 10:17 pm
FCO
-
STL
19h 17m
1 stop
Finnair Logo
12:27 pm - 12:05 pm
STL
-
FCO
16h 38m
1 stop
$907Finnair
Thu, Apr 9 - Mon, Apr 13
American Airlines Logo
1:10 pm - 11:20 pm
FCO
-
STL
17h 10m
2 stops
American Airlines Logo
9:40 pm - 11:45 pm
STL
-
FCO
19h 05m
1 stop
$928American Airlines
Thu, Sep 10 - Sun, Sep 13
Delta Logo
10:35 am - 11:25 pm
FCO
-
STL
19h 50m
2 stops
Delta Logo
6:00 am - 7:35 am
STL
-
FCO
18h 35m
1 stop
$930Delta
Wed, Apr 8 - Sun, Apr 12
Multiple Airlines Logo
1:10 pm - 5:21 pm
FCO
-
STL
35h 11m
1 stop
Multiple Airlines Logo
6:29 am - 7:05 am
STL
-
FCO
17h 36m
1 stop
$931Multiple Airlines
Wed, Apr 8 - Sun, Apr 12
Delta Logo
10:35 am - 11:25 pm
FCO
-
STL
19h 50m
2 stops
Delta Logo
12:23 pm - 11:25 am
STL
-
FCO
16h 02m
2 stops
$936Delta
Sat, Apr 11 - Wed, Apr 15
Delta Logo
10:35 am - 8:42 pm
FCO
-
STL
17h 07m
2 stops
Delta Logo
7:25 am - 10:50 am
STL
-
FCO
20h 25m
1 stop
$940Delta
Sat, Apr 11 - Wed, Apr 15
American Airlines Logo
10:00 am - 11:20 pm
FCO
-
STL
20h 20m
2 stops
American Airlines Logo
9:40 pm - 11:45 pm
STL
-
FCO
19h 05m
1 stop
$945American Airlines
Thu, Sep 10 - Sun, Sep 13
American Airlines Logo
11:05 am - 8:03 pm
FCO
-
STL
15h 58m
1 stop
American Airlines Logo
9:40 pm - 10:40 pm
STL
-
FCO
18h 00m
1 stop
$946American Airlines
Thu, Sep 10 - Sun, Sep 13
Multiple Airlines Logo
1:10 pm - 11:58 pm
FCO
-
STL
17h 48m
1 stop
Multiple Airlines Logo
11:42 am - 10:50 am
STL
-
FCO
16h 08m
1 stop
$947Multiple Airlines
Sat, Apr 11 - Wed, Apr 15
American Airlines Logo
10:00 am - 8:03 pm
FCO
-
STL
17h 03m
2 stops
American Airlines Logo
9:40 pm - 10:40 pm
STL
-
FCO
18h 00m
1 stop
$948American Airlines
Thu, Sep 10 - Sun, Sep 13

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
Sep 10
FCO1:10 pmRome Fiumicino
17h 10m
2 stops
STL11:20 pmLambert-St Louis
Sep 13
STL9:40 pmLambert-St Louis
19h 05m
1 stop
FCO11:45 pmRome Fiumicino
$928
American Airlines
Sep 10
FCO10:00 amRome Fiumicino
20h 20m
2 stops
STL11:20 pmLambert-St Louis
Sep 13
STL9:40 pmLambert-St Louis
19h 05m
1 stop
FCO11:45 pmRome Fiumicino
$945
American Airlines
Sep 10
FCO11:05 amRome Fiumicino
15h 58m
1 stop
STL8:03 pmLambert-St Louis
Sep 13
STL9:40 pmLambert-St Louis
18h 00m
1 stop
FCO10:40 pmRome Fiumicino
$946

Delta flights from Rome Fiumicino Airport to St. Louis

Our best Delta deals on Rome Fiumicino Airport to St. Louis flight tickets
Delta
Apr 9
FCO6:30 amRome Fiumicino
21h 12m
2 stops
STL8:42 pmLambert-St Louis
Apr 13
STL4:41 pmLambert-St Louis
16h 54m
2 stops
FCO4:35 pmRome Fiumicino
$928
Delta
Apr 8
FCO10:35 amRome Fiumicino
19h 50m
2 stops
STL11:25 pmLambert-St Louis
Apr 12
STL6:00 amLambert-St Louis
18h 35m
1 stop
FCO7:35 amRome Fiumicino
$930
Delta
Apr 11
FCO10:35 amRome Fiumicino
19h 50m
2 stops
STL11:25 pmLambert-St Louis
Apr 15
STL12:23 pmLambert-St Louis
16h 02m
2 stops
FCO11:25 amRome Fiumicino
$936

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 March 30, 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

Cheapest round-trip

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 4/9

10:00 am-10:17 pm

1 stop19h 17m

Lambert-St Louis

Mon 4/13

12:27 pm-12:05 pm

1 stop16h 38m

$907

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 9/10

1:10 pm-11:20 pm

2 stops17h 10m

Lambert-St Louis

Sun 9/13

9:40 pm-11:45 pm

1 stop19h 05m

$928

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 4/8

10:35 am-11:25 pm

2 stops19h 50m

Lambert-St Louis

Sun 4/12

6:00 am-7:35 am

1 stop18h 35m

$930

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 4/8

1:10 pm-5:21 pm

1 stop35h 11m

Lambert-St Louis

Sun 4/12

6:29 am-7:05 am

1 stop17h 36m

$931

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sat 4/11

10:35 am-11:25 pm

2 stops19h 50m

Lambert-St Louis

Wed 4/15

12:23 pm-11:25 am

2 stops16h 02m

$936

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sat 4/11

10:35 am-8:42 pm

2 stops17h 07m

Lambert-St Louis

Wed 4/15

7:25 am-10:50 am

1 stop20h 25m

$940

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 9/10

10:00 am-11:20 pm

2 stops20h 20m

Lambert-St Louis

Sun 9/13

9:40 pm-11:45 pm

1 stop19h 05m

$945

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 9/10

11:05 am-8:03 pm

1 stop15h 58m

Lambert-St Louis

Sun 9/13

9:40 pm-10:40 pm

1 stop18h 00m

$946
Quickest round-trip

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sat 4/11

1:10 pm-11:58 pm

1 stop17h 48m

Lambert-St Louis

Wed 4/15

11:42 am-10:50 am

1 stop16h 08m

$947

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 9/10

10:00 am-8:03 pm

2 stops17h 03m

Lambert-St Louis

Sun 9/13

9:40 pm-10:40 pm

1 stop18h 00m

$948

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 typical price of a round-trip flight between Rome Fiumicino Airport and St. Louis?

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

You could potentially save up to 20% 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

13h 35m

Direct flights

None
The fastest flight from Rome Fiumicino Airport to St. Louis takes 13h 35m
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 13h 35m, 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
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?

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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