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Cheap flights from Rome Fiumicino Airport to St. Louis from $491

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.
British Airways Logo
11:00 am - 8:21 pmFCO-STL
16h 21m1 stop
British Airways Logo
12:06 pm - 12:10 pmSTL-FCO
17h 04m2 stops
$800British Airways
Find Deal
dom., dic. 14 - sáb., ene. 10
Lufthansa Logo
10:30 am - 11:42 pmFCO-STL
20h 12m1 stop
Lufthansa Logo
11:35 am - 10:55 amSTL-FCO
16h 20m2 stops
$802Lufthansa
Find Deal
vie., nov. 14 - mar., nov. 18
British Airways Logo
7:50 am - 9:28 pmFCO-STL
20h 38m2 stops
British Airways Logo
3:54 pm - 2:55 pmSTL-FCO
16h 01m2 stops
$811British Airways
Find Deal
dom., dic. 14 - vie., ene. 9
United Airlines Logo
1:30 pm - 10:51 amFCO-STL
28h 21m2 stops
United Airlines Logo
12:31 pm - 10:55 amSTL-FCO
15h 24m2 stops
$817United Airlines
Find Deal
jue., nov. 27 - lun., dic. 1
United Airlines Logo
7:05 am - 5:39 pmFCO-STL
17h 34m2 stops
United Airlines Logo
12:31 pm - 7:45 amSTL-FCO
12h 14m1 stop
$819United Airlines
Find Deal
jue., nov. 13 - lun., nov. 17
Air France Logo
12:40 pm - 4:07 pmFCO-STL
34h 27m1 stop
Air France Logo
4:30 pm - 7:05 amSTL-FCO
31h 35m1 stop
$838Air France
Find Deal
jue., nov. 13 - lun., nov. 17
Multiple Airlines Logo
1:15 pm - 10:45 pmFCO-STL
16h 30m2 stops
Multiple Airlines Logo
4:05 pm - 8:55 amSTL-FCO
33h 50m2 stops
$842Multiple Airlines
Find Deal
vie., nov. 14 - mar., nov. 18
KLM Logo
6:10 am - 6:35 pmFCO-STL
19h 25m2 stops
KLM Logo
7:02 pm - 4:25 pmSTL-FCO
14h 23m2 stops
$910KLM
Find Deal
jue., nov. 27 - lun., dic. 1
KLM Logo
10:05 am - 8:41 pmFCO-STL
17h 36m1 stop
KLM Logo
9:55 am - 7:55 amSTL-FCO
15h 00m1 stop
$1,036KLM
Find Deal
lun., dic. 22 - sáb., ene. 3
Multiple Airlines Logo
1:10 pm - 10:43 pmFCO-STL
16h 33m2 stops
Multiple Airlines Logo
6:35 pm - 11:00 pmSTL-FCO
45h 25m2 stops
$1,098Multiple Airlines
Find Deal
dom., dic. 21 - sáb., ene. 3

Lufthansa flights from Rome Fiumicino Airport to St. Louis

Our best Lufthansa deals on Rome Fiumicino Airport to St. Louis flight tickets
Lufthansa
Nov 14
FCO10:30 amRome Fiumicino
20h 12m
1 stop
STL11:42 pmLambert-St Louis
Nov 18
STL11:35 amLambert-St Louis
16h 20m
2 stops
FCO10:55 amRome Fiumicino
$802
Find similar
Lufthansa
Nov 14
FCO10:30 amRome Fiumicino
20h 12m
1 stop
STL11:42 pmLambert-St Louis
Nov 18
STL1:10 pmLambert-St Louis
12h 20m
1 stop
FCO8:30 amRome Fiumicino
$815
Find similar

United Airlines flights from Rome Fiumicino Airport to St. Louis

Our best United Airlines deals on Rome Fiumicino Airport to St. Louis flight tickets
United Airlines
Nov 27
FCO1:30 pmRome Fiumicino
28h 21m
2 stops
STL10:51 amLambert-St Louis
Dec 1
STL12:31 pmLambert-St Louis
15h 24m
2 stops
FCO10:55 amRome Fiumicino
$817
Find similar
United Airlines
Nov 13
FCO7:05 amRome Fiumicino
17h 34m
2 stops
STL5:39 pmLambert-St Louis
Nov 17
STL12:31 pmLambert-St Louis
12h 14m
1 stop
FCO7:45 amRome Fiumicino
$819
Find similar
United Airlines
Nov 27
FCO1:30 pmRome Fiumicino
29h 58m
2 stops
STL12:28 pmLambert-St Louis
Dec 1
STL5:24 pmLambert-St Louis
31h 21m
1 stop
FCO7:45 amRome Fiumicino
$820
Find similar

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 octubre 30, 2025.
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

dom. 12/14

11:00 am-8:21 pm

1 stop16h 21m

Lambert-St Louis

sáb. 1/10

12:06 pm-12:10 pm

2 stops17h 04m

$800

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

vie. 11/14

10:30 am-11:42 pm

1 stop20h 12m

Lambert-St Louis

mar. 11/18

11:35 am-10:55 am

2 stops16h 20m

$802

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

dom. 12/14

7:50 am-9:28 pm

2 stops20h 38m

Lambert-St Louis

vie. 1/9

3:54 pm-2:55 pm

2 stops16h 01m

$811

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

jue. 11/27

1:30 pm-10:51 am

2 stops28h 21m

Lambert-St Louis

lun. 12/1

12:31 pm-10:55 am

2 stops15h 24m

$817

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

jue. 11/13

7:05 am-5:39 pm

2 stops17h 34m

Lambert-St Louis

lun. 11/17

12:31 pm-7:45 am

1 stop12h 14m

$819

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

jue. 11/13

12:40 pm-4:07 pm

1 stop34h 27m

Lambert-St Louis

lun. 11/17

4:30 pm-7:05 am

1 stop31h 35m

$838

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

vie. 11/14

1:15 pm-10:45 pm

2 stops16h 30m

Lambert-St Louis

mar. 11/18

4:05 pm-8:55 am

2 stops33h 50m

$842

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

jue. 11/27

6:10 am-6:35 pm

2 stops19h 25m

Lambert-St Louis

lun. 12/1

7:02 pm-4:25 pm

2 stops14h 23m

$910

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

lun. 12/22

10:05 am-8:41 pm

1 stop17h 36m

Lambert-St Louis

sáb. 1/3

9:55 am-7:55 am

1 stop15h 00m

$1,036

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

dom. 12/21

1:10 pm-10:43 pm

2 stops16h 33m

Lambert-St Louis

sáb. 1/3

6:35 pm-11:00 pm

2 stops45h 25m

$1,098

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 day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Thursday when prices can be found for as low as $786. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $947. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Rome Fiumicino Airport at noon is the least expensive time of day to depart. momondo users have found prices as low as $929 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $947 per ticket.

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

You could potentially save up to 1% 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

Direct flights

None
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.
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  • 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 39m, 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
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
Litchfield
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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