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Cheap flights from St. Louis to Rome from $316

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 3/22. 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.
Air Canada Logo
4:05 pm - 11:05 am
STL
-
FCO
12h 00m
1 stop
Air Canada Logo
1:15 pm - 2:42 pm
FCO
-
STL
32h 27m
2 stops
$441Air Canada
Wed, Feb 25 - Wed, Mar 4
United Airlines Logo
7:41 am - 7:45 am
STL
-
FCO
17h 04m
1 stop
United Airlines Logo
1:05 pm - 9:40 pm
FCO
-
STL
39h 35m
2 stops
$442United Airlines
Tue, Feb 24 - Tue, Mar 3
Air Canada Logo
7:41 am - 11:05 am
STL
-
FCO
20h 24m
2 stops
Air Canada Logo
1:15 pm - 2:42 pm
FCO
-
STL
32h 27m
2 stops
$445Air Canada
Wed, Feb 25 - Wed, Mar 4
Air Canada Logo
4:05 pm - 10:55 am
STL
-
FCO
11h 50m
1 stop
Air Canada Logo
12:10 pm - 2:42 pm
FCO
-
STL
32h 32m
2 stops
$446Air Canada
Tue, Mar 3 - Tue, Mar 10
United Airlines Logo
8:05 am - 6:45 am
STL
-
FCO
15h 40m
2 stops
United Airlines Logo
12:50 pm - 9:40 pm
FCO
-
STL
39h 50m
2 stops
$447United Airlines
Tue, Feb 3 - Thu, Feb 12
American Airlines Logo
6:38 pm - 4:55 pm
STL
-
FCO
15h 17m
2 stops
American Airlines Logo
1:10 pm - 11:48 pm
FCO
-
STL
16h 38m
2 stops
$448American Airlines
Sun, Feb 22 - Tue, Mar 10
Air Canada Logo
4:05 pm - 8:55 am
STL
-
FCO
33h 50m
2 stops
Air Canada Logo
12:10 pm - 2:42 pm
FCO
-
STL
32h 32m
2 stops
$449Air Canada
Tue, Mar 3 - Tue, Mar 10
American Airlines Logo
6:13 am - 9:00 am
STL
-
FCO
19h 47m
1 stop
American Airlines Logo
1:10 pm - 11:48 pm
FCO
-
STL
16h 38m
2 stops
$451American Airlines
Sun, Feb 22 - Tue, Mar 10
United Airlines Logo
11:25 am - 7:45 am
STL
-
FCO
13h 20m
1 stop
United Airlines Logo
9:45 am - 9:07 pm
FCO
-
STL
17h 22m
1 stop
$452United Airlines
Sun, Feb 22 - Tue, Mar 10
British Airways Logo
2:00 pm - 9:00 am
STL
-
FCO
12h 00m
1 stop
British Airways Logo
1:10 pm - 11:04 pm
FCO
-
STL
16h 54m
1 stop
$454British Airways
Wed, Feb 18 - Wed, Feb 25

Air Canada flights from St. Louis to Rome

Our best Air Canada deals on St. Louis to Rome flight tickets
Air Canada
Feb 25
STL4:05 pmLambert-St Louis
12h 00m
1 stop
FCO11:05 amRome Fiumicino
Mar 4
FCO1:15 pmRome Fiumicino
32h 27m
2 stops
STL2:42 pmLambert-St Louis
$441
Air Canada
Mar 3
STL4:05 pmLambert-St Louis
33h 50m
2 stops
FCO8:55 amRome Fiumicino
Mar 10
FCO12:10 pmRome Fiumicino
32h 32m
2 stops
STL2:42 pmLambert-St Louis
$449
Air Canada
Feb 22
STL4:05 pmLambert-St Louis
14h 55m
2 stops
FCO2:00 pmRome Fiumicino
Mar 10
FCO12:10 pmRome Fiumicino
33h 19m
1 stop
STL3:29 pmLambert-St Louis
$451

United Airlines flights from St. Louis to Rome

Our best United Airlines deals on St. Louis to Rome flight tickets
United Airlines
Feb 24
STL7:41 amLambert-St Louis
17h 04m
1 stop
FCO7:45 amRome Fiumicino
Mar 3
FCO1:05 pmRome Fiumicino
39h 35m
2 stops
STL9:40 pmLambert-St Louis
$442
United Airlines
Feb 18
STL11:25 amLambert-St Louis
16h 40m
2 stops
FCO11:05 amRome Fiumicino
Feb 25
FCO11:15 amRome Fiumicino
40h 50m
2 stops
STL9:05 pmLambert-St Louis
$445
United Airlines
Mar 3
STL4:05 pmLambert-St Louis
11h 50m
1 stop
FCO10:55 amRome Fiumicino
Mar 10
FCO12:10 pmRome Fiumicino
32h 32m
2 stops
STL2:42 pmLambert-St Louis
$446

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Rome 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 January 21, 2026.
Use the filters below to find and compare flights from St. Louis to Rome that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 2/25

4:05 pm-11:05 am

1 stop12h 00m

Rome Fiumicino

Wed 3/4

1:15 pm-2:42 pm

2 stops32h 27m

$441

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 2/24

7:41 am-7:45 am

1 stop17h 04m

Rome Fiumicino

Tue 3/3

1:05 pm-9:40 pm

2 stops39h 35m

$442

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 2/25

7:41 am-11:05 am

2 stops20h 24m

Rome Fiumicino

Wed 3/4

1:15 pm-2:42 pm

2 stops32h 27m

$445

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 3/3

4:05 pm-10:55 am

1 stop11h 50m

Rome Fiumicino

Tue 3/10

12:10 pm-2:42 pm

2 stops32h 32m

$446

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 2/3

8:05 am-6:45 am

2 stops15h 40m

Rome Fiumicino

Thu 2/12

12:50 pm-9:40 pm

2 stops39h 50m

$447

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/22

6:38 pm-4:55 pm

2 stops15h 17m

Rome Fiumicino

Tue 3/10

1:10 pm-11:48 pm

2 stops16h 38m

$448

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 3/3

4:05 pm-8:55 am

2 stops33h 50m

Rome Fiumicino

Tue 3/10

12:10 pm-2:42 pm

2 stops32h 32m

$449

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/22

6:13 am-9:00 am

1 stop19h 47m

Rome Fiumicino

Tue 3/10

1:10 pm-11:48 pm

2 stops16h 38m

$451

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/22

11:25 am-7:45 am

1 stop13h 20m

Rome Fiumicino

Tue 3/10

9:45 am-9:07 pm

1 stop17h 22m

$452

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 2/18

2:00 pm-9:00 am

1 stop12h 00m

Rome Fiumicino

Wed 2/25

1:10 pm-11:04 pm

1 stop16h 54m

$454

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

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?

What is the cheapest month to fly to Rome?

The cheapest month to fly to Rome from St. Louis is in February. Flight prices, which tend to average around $690, are often lower during this time because this is during the off-season. If you aren’t able to travel to Rome 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 $693.

How far in advance should I book a flight to Rome?

You are more likely to see cheaper flights to Rome from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Rome for around $960 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Rome from St. Louis for as low as $737 on momondo.

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

You could potentially save up to 7% on your flight if you consider stops on a St. Louis to Rome flight.

How have St. Louis to Rome flight prices changed over time?

When to book flights from St. Louis to Rome

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

Cheap St. Louis to Rome (STL to ROM) flight deals and tips

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

Fastest flight time

11h 50m

Direct flights

None
The fastest flight from St. Louis to Rome takes 11h 50m
There are no direct flights from St. Louis to Rome. There are no popular flight routes from St. Louis to Rome.
Search flight deals

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

    A flight from Lambert-St Louis to Rome will travel around 5053.3 mi. Typically, this will take 11h 50m by plane in normal conditions.

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

    Prices for flights from Lambert-St Louis Airport to Rome were last updated today.

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

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

    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 Lambert-St Louis Airport to Rome.

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

    The necessary travel and health documents for your Rome trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from St. Louis to Rome

Compare and see reviews for airlines that fly from St. Louis to Rome with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $481Free CancellationRating
6.7
7,689 reviews
Search British Airways flights
LufthansaPriceFrom $506Free CancellationRating
6.8
7,738 reviews
Search Lufthansa flights
KLMPriceFrom $506Free CancellationRating
7.7
1,442 reviews
Search KLM flights
IberiaPriceFrom $536Free CancellationRating
7.0
3,094 reviews
Search Iberia flights
United AirlinesPriceFrom $549Free CancellationRating
7.4
9,191 reviews
Search United Airlines flights
DeltaPriceFrom $566Free CancellationRating
7.9
8,088 reviews
Search Delta flights
American AirlinesPriceFrom $665Free CancellationRating
7.2
11,173 reviews
Search American Airlines flights
Air CanadaPriceFrom $705Free CancellationRating
7.1
10,646 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
Cassino
Pienza
Montepulciano
Ponza
Tivoli
Sperlonga
Gaeta
Orvieto
Chianciano Terme
Cortona
Terracina
Ciampino
Grosseto
Sabaudia
Santa Marinella
Ascoli Piceno
Saturnia
Orbetello

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Rome. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo enables you to select and highlight flights to Rome from St. Louis with this policy.

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

Once all potential St. Louis to Rome flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are not ready to book a flight from St. Louis to Rome now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Rome and let you know when they change.

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Find better results for your trip to Italy

Fly into one of these airports located in Rome

Airports listed have a maximum distance of 14.7 mi from Rome
Rome Ciampino Airport
Rome Fiumicino Airport