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Cheap flights from St. Louis to Rome from $428

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Rome departing on 7/22. 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
0 bags

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Find the cheapest flights from St. Louis to Rome

Cheap round-trip flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
3:42 pm - 6:35 pm
STL
-
FCO
19h 53m
2 stops
Scandinavian Airlines Logo
7:25 pm - 8:50 pm
FCO
-
STL
32h 25m
2 stops
$780Scandinavian Airlines
Sat, Sep 12 - Fri, Sep 18
Multiple Airlines Logo
1:00 pm - 8:15 am
STL
-
FCO
12h 15m
1 stop
Multiple Airlines Logo
6:50 am - 1:25 pm
FCO
-
STL
13h 35m
1 stop
$785Multiple Airlines
Sun, Aug 16 - Tue, Aug 25
Iberia Logo
10:45 am - 9:00 am
STL
-
FCO
15h 15m
1 stop
Iberia Logo
1:00 pm - 8:55 pm
FCO
-
STL
14h 55m
1 stop
$790Iberia
Sun, Nov 8 - Wed, Nov 18
Iberia Logo
10:45 am - 9:00 am
STL
-
FCO
15h 15m
1 stop
Iberia Logo
2:45 pm - 10:37 am
FCO
-
STL
26h 52m
2 stops
$794Iberia
Sun, Nov 8 - Wed, Nov 18
Multiple Airlines Logo
1:00 pm - 8:15 am
STL
-
FCO
12h 15m
1 stop
Multiple Airlines Logo
8:00 am - 5:06 pm
FCO
-
STL
16h 06m
2 stops
$796Multiple Airlines
Sun, Aug 16 - Tue, Aug 25
Lufthansa Logo
1:27 pm - 7:45 am
STL
-
FCO
11h 18m
1 stop
Lufthansa Logo
7:05 am - 1:45 pm
FCO
-
STL
13h 40m
1 stop
$797Lufthansa
Sun, Nov 8 - Wed, Nov 18
Finnair Logo
1:20 pm - 10:45 am
STL
-
FCO
14h 25m
1 stop
Finnair Logo
6:40 pm - 7:30 pm
FCO
-
STL
31h 50m
2 stops
$798Finnair
Mon, Nov 9 - Wed, Nov 18
United Airlines Logo
8:25 am - 8:30 am
STL
-
FCO
17h 05m
1 stop
United Airlines Logo
1:15 pm - 4:40 pm
FCO
-
STL
34h 25m
2 stops
$800United Airlines
Sun, Nov 8 - Wed, Nov 18
Iberia Logo
7:00 am - 11:10 am
STL
-
FCO
21h 10m
2 stops
Iberia Logo
2:45 pm - 8:58 am
FCO
-
STL
25h 13m
2 stops
$802Iberia
Sun, Nov 8 - Wed, Nov 18
Air Canada Logo
12:10 pm - 9:15 am
STL
-
FCO
14h 05m
1 stop
Air Canada Logo
2:20 pm - 12:02 pm
FCO
-
STL
28h 42m
2 stops
$803Air Canada
Wed, Aug 5 - Wed, Aug 19

United Airlines flights from St. Louis to Rome Fiumicino Airport

Our best United Airlines deals on St. Louis to Rome Fiumicino Airport flight tickets
United Airlines
Nov 8
STL8:25 amLambert-St Louis
17h 05m
1 stop
FCO8:30 amRome Fiumicino
Nov 18
FCO1:15 pmRome Fiumicino
34h 25m
2 stops
STL4:40 pmLambert-St Louis
$800
United Airlines
Nov 9
STL8:25 amLambert-St Louis
19h 30m
2 stops
FCO10:55 amRome Fiumicino
Nov 18
FCO1:15 pmRome Fiumicino
34h 25m
2 stops
STL4:40 pmLambert-St Louis
$805
United Airlines
Nov 9
STL2:00 pmLambert-St Louis
13h 55m
1 stop
FCO10:55 amRome Fiumicino
Nov 18
FCO7:05 amRome Fiumicino
13h 40m
1 stop
STL1:45 pmLambert-St Louis
$809

Air Canada flights from St. Louis to Rome Fiumicino Airport

Our best Air Canada deals on St. Louis to Rome Fiumicino Airport flight tickets
Air Canada
Aug 5
STL12:10 pmLambert-St Louis
14h 05m
1 stop
FCO9:15 amRome Fiumicino
Aug 19
FCO2:20 pmRome Fiumicino
28h 42m
2 stops
STL12:02 pmLambert-St Louis
$803
Air Canada
Nov 8
STL6:40 amLambert-St Louis
19h 15m
2 stops
FCO8:55 amRome Fiumicino
Nov 18
FCO1:15 pmRome Fiumicino
32h 03m
2 stops
STL2:18 pmLambert-St Louis
$804
Air Canada
Nov 13
STL4:15 pmLambert-St Louis
57h 40m
2 stops
FCO8:55 amRome Fiumicino
Nov 27
FCO1:15 pmRome Fiumicino
40h 39m
2 stops
STL10:54 pmLambert-St Louis
$807

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Rome Fiumicino Airport 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 May 28, 2026.
Use the filters below to find and compare flights from St. Louis to Rome Fiumicino Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 9/12

3:42 pm-6:35 pm

2 stops19h 53m

Rome Fiumicino

Fri 9/18

7:25 pm-8:50 pm

2 stops32h 25m

$780

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 8/16

1:00 pm-8:15 am

1 stop12h 15m

Rome Fiumicino

Tue 8/25

6:50 am-1:25 pm

1 stop13h 35m

$785

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/8

10:45 am-9:00 am

1 stop15h 15m

Rome Fiumicino

Wed 11/18

1:00 pm-8:55 pm

1 stop14h 55m

$790

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/8

10:45 am-9:00 am

1 stop15h 15m

Rome Fiumicino

Wed 11/18

2:45 pm-10:37 am

2 stops26h 52m

$794

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 8/16

1:00 pm-8:15 am

1 stop12h 15m

Rome Fiumicino

Tue 8/25

8:00 am-5:06 pm

2 stops16h 06m

$796
Quickest round-trip

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/8

1:27 pm-7:45 am

1 stop11h 18m

Rome Fiumicino

Wed 11/18

7:05 am-1:45 pm

1 stop13h 40m

$797

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 11/9

1:20 pm-10:45 am

1 stop14h 25m

Rome Fiumicino

Wed 11/18

6:40 pm-7:30 pm

2 stops31h 50m

$798

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/8

8:25 am-8:30 am

1 stop17h 05m

Rome Fiumicino

Wed 11/18

1:15 pm-4:40 pm

2 stops34h 25m

$800

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/8

7:00 am-11:10 am

2 stops21h 10m

Rome Fiumicino

Wed 11/18

2:45 pm-8:58 am

2 stops25h 13m

$802

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 8/5

12:10 pm-9:15 am

1 stop14h 05m

Rome Fiumicino

Wed 8/19

2:20 pm-12:02 pm

2 stops28h 42m

$803

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 Rome from

How to get the cheapest flight ticket from St. Louis to Rome Fiumicino Airport

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 St. Louis and Rome Fiumicino Airport?

What is the cheapest month to fly to Rome Fiumicino Airport?

The cheapest month to fly to Rome Fiumicino Airport from St. Louis is in February. Flight prices, which tend to average around $544, are often lower during this time because this is during the off-season. If you aren’t able to travel to Rome Fiumicino Airport during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $643.

How far in advance should I book a flight from St. Louis to Rome Fiumicino Airport?

You are more likely to see cheaper flights to Rome Fiumicino Airport from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Rome Fiumicino Airport for around $928 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Rome Fiumicino Airport from St. Louis for as low as $754 on momondo.

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

You could potentially save up to 18% on your flight if you consider stops on a St. Louis to Rome Fiumicino Airport flight.

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

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

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

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

Fastest flight time

11h 18m

Direct flights

None
The fastest flight from St. Louis to Rome Fiumicino Airport takes 11h 18m
There are no direct flights from St. Louis to Rome Fiumicino Airport. There are no popular flight routes from St. Louis to Rome Fiumicino Airport.
Search flight deals

Frequently asked questions about flying from St. Louis to Rome Fiumicino Airport

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

    A flight from Lambert-St Louis to Rome Fiumicino will travel around 5048.2 mi. 11h 18m is a normal flight duration for this route.

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

    Prices for flights from Lambert-St Louis Airport to Rome Fiumicino Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Rome Fiumicino Airport?

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

  • What documentation or ID do you need to fly to Rome Fiumicino Airport?

    The travel and health documents you'll need for your trip to Rome Fiumicino Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Rome Fiumicino Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Rome Fiumicino Airport?

Best airlines flying from St. Louis to Rome Fiumicino Airport

Compare and see reviews for airlines that fly from St. Louis to Rome Fiumicino Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $472Free CancellationRating
6.7
8,007 reviews
Search British Airways flights
LufthansaPriceFrom $500Free CancellationRating
6.8
8,032 reviews
Search Lufthansa flights
KLMPriceFrom $506Free CancellationRating
7.8
1,525 reviews
Search KLM flights
United AirlinesPriceFrom $543Free CancellationRating
7.4
9,751 reviews
Search United Airlines flights
DeltaPriceFrom $555Free CancellationRating
7.9
8,423 reviews
Search Delta flights
Air CanadaPriceFrom $564Free CancellationRating
7.1
11,095 reviews
Search Air Canada flights
American AirlinesPriceFrom $665Free CancellationRating
7.1
11,639 reviews
Search American Airlines flights

Traveling to a place near Rome?

Book flights to Rome if you plan to visit one of these locations
Fiumicino
Civitavecchia
Cassino
Gaeta
Orvieto
Montepulciano
Ponza
Ladispoli
Pienza
Chianciano Terme
Tivoli
Sperlonga
Terracina
Ciampino
Saturnia
Santa Marinella
Anzio
Orbetello
Grosseto
Ascoli Piceno

Why use momondo?

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

Finding the right flight to Rome from St. Louis 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 Rome quick and easy, saving you time and money.

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

Flights from St. Louis to Rome with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for St. Louis to Rome flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Rome from St. Louis 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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