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Cheap flights from Rome Fiumicino Airport to St. Louis from $384

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 9/5. 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

Delta Logo
6:30 am - 2:22 pmFCO-STL
14h 52m2 stops
Delta Logo
6:00 pm - 4:00 pmSTL-FCO
15h 00m2 stops
$759Delta
Find Deal
Mon, Sep 8 - Tue, Sep 30
Delta Logo
6:30 am - 4:06 pmFCO-STL
16h 36m2 stops
Delta Logo
6:01 am - 7:35 amSTL-FCO
18h 34m1 stop
$762Delta
Find Deal
Mon, Sep 8 - Tue, Sep 30
KLM Logo
6:30 am - 4:06 pmFCO-STL
16h 36m2 stops
KLM Logo
2:15 pm - 9:20 amSTL-FCO
12h 05m1 stop
$775KLM
Find Deal
Sun, Sep 7 - Tue, Sep 30
British Airways Logo
11:05 am - 10:05 pmFCO-STL
18h 00m1 stop
British Airways Logo
5:25 pm - 10:50 pmSTL-FCO
22h 25m2 stops
$781British Airways
Find Deal
Fri, Sep 5 - Tue, Sep 30
United Airlines Logo
7:10 am - 1:30 pmFCO-STL
13h 20m1 stop
United Airlines Logo
6:30 am - 7:55 amSTL-FCO
18h 25m1 stop
$782United Airlines
Find Deal
Fri, Sep 5 - Tue, Sep 30
American Airlines Logo
11:10 am - 9:54 amFCO-STL
29h 44m2 stops
American Airlines Logo
2:50 pm - 12:50 pmSTL-FCO
15h 00m2 stops
$784American Airlines
Find Deal
Thu, Nov 27 - Mon, Dec 1
American Airlines Logo
11:10 am - 9:54 amFCO-STL
29h 44m2 stops
American Airlines Logo
2:50 pm - 12:50 pmSTL-FCO
15h 00m2 stops
$786American Airlines
Find Deal
Thu, Nov 27 - Mon, Dec 1
United Airlines Logo
7:10 am - 6:23 pmFCO-STL
18h 13m2 stops
United Airlines Logo
6:30 am - 9:15 amSTL-FCO
19h 45m2 stops
$788United Airlines
Find Deal
Fri, Sep 5 - Tue, Sep 30
British Airways Logo
10:20 am - 9:06 pmFCO-STL
17h 46m1 stop
British Airways Logo
3:59 pm - 10:35 pmSTL-FCO
23h 36m2 stops
$805British Airways
Find Deal
Fri, Sep 12 - Fri, Sep 19
KLM Logo
11:35 am - 11:14 pmFCO-STL
18h 39m1 stop
KLM Logo
11:02 am - 11:05 amSTL-FCO
17h 03m1 stop
$976KLM
Find Deal
Fri, Aug 15 - Tue, Aug 19

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
Nov 27
FCO11:10 amRome Fiumicino
29h 44m
2 stops
STL9:54 amLambert-St Louis
Dec 1
STL2:50 pmLambert-St Louis
15h 00m
2 stops
FCO12:50 pmRome Fiumicino
$784
Find similar
American Airlines
Nov 27
FCO11:10 amRome Fiumicino
29h 44m
2 stops
STL9:54 amLambert-St Louis
Dec 1
STL2:50 pmLambert-St Louis
15h 00m
2 stops
FCO12:50 pmRome Fiumicino
$786
Find similar
American Airlines
Nov 27
FCO7:40 amRome Fiumicino
35h 04m
2 stops
STL11:44 amLambert-St Louis
Dec 1
STL11:51 amLambert-St Louis
22h 04m
2 stops
FCO4:55 pmRome Fiumicino
$793
Find similar

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
Sep 5
FCO11:05 amRome Fiumicino
18h 00m
1 stop
STL10:05 pmLambert-St Louis
Sep 30
STL5:25 pmLambert-St Louis
22h 25m
2 stops
FCO10:50 pmRome Fiumicino
$781
Find similar
British Airways
Sep 12
FCO10:20 amRome Fiumicino
17h 46m
1 stop
STL9:06 pmLambert-St Louis
Sep 19
STL3:59 pmLambert-St Louis
23h 36m
2 stops
FCO10:35 pmRome Fiumicino
$805
Find similar
British Airways
Nov 27
FCO3:45 pmRome Fiumicino
35h 15m
2 stops
STL8:00 pmLambert-St Louis
Dec 1
STL10:45 amLambert-St Louis
15h 15m
1 stop
FCO9:00 amRome Fiumicino
$807
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 July 31, 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

Mon 9/8

6:30 am-2:22 pm

2 stops14h 52m

Lambert-St Louis

Tue 9/30

6:00 pm-4:00 pm

2 stops15h 00m

$759

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Mon 9/8

6:30 am-4:06 pm

2 stops16h 36m

Lambert-St Louis

Tue 9/30

6:01 am-7:35 am

1 stop18h 34m

$762

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sun 9/7

6:30 am-4:06 pm

2 stops16h 36m

Lambert-St Louis

Tue 9/30

2:15 pm-9:20 am

1 stop12h 05m

$775

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 9/5

11:05 am-10:05 pm

1 stop18h 00m

Lambert-St Louis

Tue 9/30

5:25 pm-10:50 pm

2 stops22h 25m

$781

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 9/5

7:10 am-1:30 pm

1 stop13h 20m

Lambert-St Louis

Tue 9/30

6:30 am-7:55 am

1 stop18h 25m

$782

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 11/27

11:10 am-9:54 am

2 stops29h 44m

Lambert-St Louis

Mon 12/1

2:50 pm-12:50 pm

2 stops15h 00m

$784

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 11/27

11:10 am-9:54 am

2 stops29h 44m

Lambert-St Louis

Mon 12/1

2:50 pm-12:50 pm

2 stops15h 00m

$786

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 9/5

7:10 am-6:23 pm

2 stops18h 13m

Lambert-St Louis

Tue 9/30

6:30 am-9:15 am

2 stops19h 45m

$788

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 9/12

10:20 am-9:06 pm

1 stop17h 46m

Lambert-St Louis

Fri 9/19

3:59 pm-10:35 pm

2 stops23h 36m

$805

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 8/15

11:35 am-11:14 pm

1 stop18h 39m

Lambert-St Louis

Tue 8/19

11:02 am-11:05 am

1 stop17h 03m

$976

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?

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 4% 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

Best Price Found

$384

Fastest flight time

13h 20m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Rome Fiumicino Airport in the past 72 hours is $384. The best round-trip flight deal from Rome Fiumicino Airport to St. Louis found on momondo in the last 72 hours is $759.
The fastest flight from Rome Fiumicino Airport to St. Louis takes 13h 20m
There are no direct flights from Rome Fiumicino Airport to St. Louis. Popular non-direct route for this connection is Rome Fiumicino Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
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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 13h 20m, 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
Fenton
Collinsville
O'Fallon
Alton
St. Peters
Farmington
Wentzville
Festus
Glencoe
Eureka
Edwardsville
Clayton
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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