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Cheap flights from St. Louis to Rome from $148

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 9/28. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Rome

Cheap round-trip flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
8:55 am - 10:25 am
STL
-
FCO
18h 30m
2 stops
Aer Lingus Logo
7:30 am - 8:24 pm
FCO
-
STL
19h 54m
2 stops
$562Aer Lingus
Wed, Aug 19 - Wed, Aug 26
Aer Lingus Logo
8:55 am - 10:25 am
STL
-
FCO
18h 30m
2 stops
Aer Lingus Logo
7:30 am - 8:24 pm
FCO
-
STL
19h 54m
2 stops
$567Aer Lingus
Wed, Aug 19 - Wed, Aug 26
Lufthansa Logo
6:50 pm - 6:00 pm
STL
-
FCO
16h 10m
2 stops
Lufthansa Logo
7:05 am - 1:45 pm
FCO
-
STL
13h 40m
1 stop
$761Lufthansa
Mon, Nov 9 - Wed, Nov 18
Lufthansa Logo
6:50 pm - 6:15 pm
STL
-
FCO
16h 25m
2 stops
Lufthansa Logo
7:05 am - 1:45 pm
FCO
-
STL
13h 40m
1 stop
$765Lufthansa
Sun, Nov 8 - Wed, Nov 18
United Airlines Logo
1:08 pm - 7:45 am
STL
-
FCO
11h 37m
1 stop
United Airlines Logo
1:15 pm - 2:30 pm
FCO
-
STL
32h 15m
2 stops
$769United Airlines
Sun, Nov 8 - Wed, Nov 18
United Airlines Logo
9:44 am - 7:55 am
STL
-
FCO
15h 11m
1 stop
United Airlines Logo
1:15 pm - 12:10 pm
FCO
-
STL
29h 55m
2 stops
$769United Airlines
Mon, Nov 9 - Wed, Nov 18
Air Canada Logo
7:30 am - 8:55 am
STL
-
FCO
18h 25m
2 stops
Air Canada Logo
1:15 pm - 3:43 pm
FCO
-
STL
33h 28m
2 stops
$773Air Canada
Sun, Nov 8 - Wed, Nov 18
Air Canada Logo
4:05 pm - 8:55 am
STL
-
FCO
57h 50m
2 stops
Air Canada Logo
1:15 pm - 3:43 pm
FCO
-
STL
33h 28m
2 stops
$776Air Canada
Mon, Nov 9 - Wed, Nov 18
British Airways Logo
12:01 pm - 11:25 am
STL
-
FCO
16h 24m
2 stops
British Airways Logo
1:00 pm - 10:44 pm
FCO
-
STL
16h 44m
1 stop
$812British Airways
Mon, Jan 11 - Sat, Jan 16
British Airways Logo
5:27 pm - 4:55 pm
STL
-
FCO
16h 28m
2 stops
British Airways Logo
10:00 am - 11:46 pm
FCO
-
STL
20h 46m
1 stop
$833British Airways
Wed, Jan 13 - Fri, Apr 30

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Aer Lingus flights from St. Louis to Rome Fiumicino Airport

Our best Aer Lingus deals on St. Louis to Rome Fiumicino Airport flight tickets
Aer Lingus
Aug 19
STL8:55 amLambert-St Louis
18h 30m
2 stops
FCO10:25 amRome Fiumicino
Aug 26
FCO7:30 amRome Fiumicino
19h 54m
2 stops
STL8:24 pmLambert-St Louis
$562
Aer Lingus
Aug 19
STL8:55 amLambert-St Louis
18h 30m
2 stops
FCO10:25 amRome Fiumicino
Aug 26
FCO7:30 amRome Fiumicino
19h 54m
2 stops
STL8:24 pmLambert-St Louis
$567
Aer Lingus
Aug 16
STL8:55 amLambert-St Louis
18h 30m
2 stops
FCO10:25 amRome Fiumicino
Aug 23
FCO7:30 amRome Fiumicino
19h 54m
2 stops
STL8:24 pmLambert-St Louis
$617

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
STL1:08 pmLambert-St Louis
11h 37m
1 stop
FCO7:45 amRome Fiumicino
Nov 18
FCO1:15 pmRome Fiumicino
32h 15m
2 stops
STL2:30 pmLambert-St Louis
$769
United Airlines
Nov 9
STL9:44 amLambert-St Louis
15h 11m
1 stop
FCO7:55 amRome Fiumicino
Nov 18
FCO1:15 pmRome Fiumicino
29h 55m
2 stops
STL12:10 pmLambert-St Louis
$774
United Airlines
Nov 8
STL1:08 pmLambert-St Louis
11h 37m
1 stop
FCO7:45 amRome Fiumicino
Nov 18
FCO1:15 pmRome Fiumicino
32h 15m
2 stops
STL2:30 pmLambert-St Louis
$775

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 July 30, 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

Wed 8/19

8:55 am-10:25 am

2 stops18h 30m

Rome Fiumicino

Wed 8/26

7:30 am-8:24 pm

2 stops19h 54m

$562

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 8/19

8:55 am-10:25 am

2 stops18h 30m

Rome Fiumicino

Wed 8/26

7:30 am-8:24 pm

2 stops19h 54m

$567
Quickest round-trip

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 11/9

6:50 pm-6:00 pm

2 stops16h 10m

Rome Fiumicino

Wed 11/18

7:05 am-1:45 pm

1 stop13h 40m

$761

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/8

6:50 pm-6:15 pm

2 stops16h 25m

Rome Fiumicino

Wed 11/18

7:05 am-1:45 pm

1 stop13h 40m

$765

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/8

1:08 pm-7:45 am

1 stop11h 37m

Rome Fiumicino

Wed 11/18

1:15 pm-2:30 pm

2 stops32h 15m

$769

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 11/9

9:44 am-7:55 am

1 stop15h 11m

Rome Fiumicino

Wed 11/18

1:15 pm-12:10 pm

2 stops29h 55m

$769

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/8

7:30 am-8:55 am

2 stops18h 25m

Rome Fiumicino

Wed 11/18

1:15 pm-3:43 pm

2 stops33h 28m

$773

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 11/9

4:05 pm-8:55 am

2 stops57h 50m

Rome Fiumicino

Wed 11/18

1:15 pm-3:43 pm

2 stops33h 28m

$776

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 1/11

12:01 pm-11:25 am

2 stops16h 24m

Rome Fiumicino

Sat 1/16

1:00 pm-10:44 pm

1 stop16h 44m

$812

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 1/13

5:27 pm-4:55 pm

2 stops16h 28m

Rome Fiumicino

Fri 4/30

10:00 am-11:46 pm

1 stop20h 46m

$833

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?

Prices are currently low for flights on this route.

Typical prices usually range from $851 to $1,164.
The lowest price recently found on this route was $562.

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 $634, 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 $665.

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 $984 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 $729 on momondo.

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

You could potentially save up to 13% 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 37m

Direct flights

None
The fastest flight from St. Louis to Rome Fiumicino Airport takes 11h 37m
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 37m 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
8,129 reviews
Search British Airways flights
LufthansaPriceFrom $500Free CancellationRating
6.8
8,166 reviews
Search Lufthansa flights
KLMPriceFrom $506Free CancellationRating
7.8
1,551 reviews
Search KLM flights
United AirlinesPriceFrom $549Free CancellationRating
7.4
10,047 reviews
Search United Airlines flights
DeltaPriceFrom $587Free CancellationRating
7.8
8,490 reviews
Search Delta flights
American AirlinesPriceFrom $665Free CancellationRating
7.1
11,841 reviews
Search American Airlines flights
Air CanadaPriceFrom $810Free CancellationRating
7.1
11,406 reviews
Search Air Canada flights

Traveling to a place near Rome?

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

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.

An easier way to manage your Rome Fiumicino Airport trip

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