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Cheap flights from St. Louis to Rome from $305

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 12/3. 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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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
1:00 pm - 7:45 amSTL-FCO
11h 45m1 stop
United Airlines Logo
7:05 am - 1:55 pmFCO-STL
13h 50m1 stop
$488United Airlines
Find Deal
Thu, Dec 11 - Wed, Dec 24
United Airlines Logo
6:30 am - 6:15 pmSTL-FCO
28h 45m2 stops
United Airlines Logo
11:15 am - 2:30 pmFCO-STL
34h 15m2 stops
$489United Airlines
Find Deal
Tue, Dec 30 - Wed, Jan 14
Air Canada Logo
9:57 am - 9:25 amSTL-FCO
16h 28m2 stops
Air Canada Logo
12:50 pm - 12:29 pmFCO-STL
30h 39m2 stops
$490Air Canada
Find Deal
Tue, Jan 13 - Thu, Jan 22
United Airlines Logo
4:05 pm - 10:55 amSTL-FCO
11h 50m1 stop
United Airlines Logo
12:50 pm - 7:27 pmFCO-STL
37h 37m2 stops
$492United Airlines
Find Deal
Mon, Jan 19 - Thu, Jan 29
United Airlines Logo
1:00 pm - 7:45 amSTL-FCO
11h 45m1 stop
United Airlines Logo
9:45 am - 9:43 pmFCO-STL
18h 58m2 stops
$494United Airlines
Find Deal
Thu, Dec 11 - Wed, Dec 24
Multiple Airlines Logo
9:30 am - 9:00 amSTL-FCO
16h 30m2 stops
Multiple Airlines Logo
11:00 am - 10:50 amFCO-STL
30h 50m2 stops
$498Multiple Airlines
Find Deal
Thu, Dec 11 - Wed, Dec 24
Air Canada Logo
6:30 am - 9:25 amSTL-FCO
19h 55m2 stops
Air Canada Logo
1:30 pm - 3:29 pmFCO-STL
32h 59m2 stops
$499Air Canada
Find Deal
Tue, Jan 20 - Tue, Jan 27
Air Canada Logo
8:05 am - 9:25 amSTL-FCO
18h 20m2 stops
Air Canada Logo
12:50 pm - 3:29 pmFCO-STL
33h 39m1 stop
$502Air Canada
Find Deal
Tue, Jan 13 - Thu, Jan 22
Air Canada Logo
8:05 am - 9:25 amSTL-FCO
18h 20m2 stops
Air Canada Logo
12:50 pm - 3:29 pmFCO-STL
33h 39m1 stop
$503Air Canada
Find Deal
Tue, Jan 13 - Thu, Jan 22
Multiple Airlines Logo
5:16 am - 10:45 amSTL-FCO
22h 29m1 stop
Multiple Airlines Logo
6:40 pm - 7:29 pmFCO-STL
31h 49m2 stops
$505Multiple Airlines
Find Deal
Tue, Dec 30 - Wed, Jan 14

Air Canada flights from St. Louis to Rome

Our best Air Canada deals on St. Louis to Rome flight tickets
Air Canada
Jan 13
STL9:57 amLambert-St Louis
16h 28m
2 stops
FCO9:25 amRome Fiumicino
Jan 22
FCO12:50 pmRome Fiumicino
30h 39m
2 stops
STL12:29 pmLambert-St Louis
$490
Find similar
Air Canada
Jan 20
STL6:30 amLambert-St Louis
19h 55m
2 stops
FCO9:25 amRome Fiumicino
Jan 27
FCO1:30 pmRome Fiumicino
32h 59m
2 stops
STL3:29 pmLambert-St Louis
$499
Find similar
Air Canada
Jan 13
STL8:05 amLambert-St Louis
18h 20m
2 stops
FCO9:25 amRome Fiumicino
Jan 22
FCO12:50 pmRome Fiumicino
33h 39m
1 stop
STL3:29 pmLambert-St Louis
$503
Find similar

United Airlines flights from St. Louis to Rome

Our best United Airlines deals on St. Louis to Rome flight tickets
United Airlines
Dec 11
STL1:00 pmLambert-St Louis
11h 45m
1 stop
FCO7:45 amRome Fiumicino
Dec 24
FCO7:05 amRome Fiumicino
13h 50m
1 stop
STL1:55 pmLambert-St Louis
$488
Find similar
United Airlines
Dec 30
STL6:30 amLambert-St Louis
28h 45m
2 stops
FCO6:15 pmRome Fiumicino
Jan 14
FCO11:15 amRome Fiumicino
34h 15m
2 stops
STL2:30 pmLambert-St Louis
$489
Find similar
United Airlines
Jan 19
STL4:05 pmLambert-St Louis
11h 50m
1 stop
FCO10:55 amRome Fiumicino
Jan 29
FCO12:50 pmRome Fiumicino
37h 37m
2 stops
STL7:27 pmLambert-St Louis
$492
Find similar

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 November 13, 2025.
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

Thu 12/11

1:00 pm-7:45 am

1 stop11h 45m

Rome Fiumicino

Wed 12/24

7:05 am-1:55 pm

1 stop13h 50m

$488

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 12/30

6:30 am-6:15 pm

2 stops28h 45m

Rome Fiumicino

Wed 1/14

11:15 am-2:30 pm

2 stops34h 15m

$489

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 1/13

9:57 am-9:25 am

2 stops16h 28m

Rome Fiumicino

Thu 1/22

12:50 pm-12:29 pm

2 stops30h 39m

$490

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 1/19

4:05 pm-10:55 am

1 stop11h 50m

Rome Fiumicino

Thu 1/29

12:50 pm-7:27 pm

2 stops37h 37m

$492

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Thu 12/11

1:00 pm-7:45 am

1 stop11h 45m

Rome Fiumicino

Wed 12/24

9:45 am-9:43 pm

2 stops18h 58m

$494

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Thu 12/11

9:30 am-9:00 am

2 stops16h 30m

Rome Fiumicino

Wed 12/24

11:00 am-10:50 am

2 stops30h 50m

$498

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 1/20

6:30 am-9:25 am

2 stops19h 55m

Rome Fiumicino

Tue 1/27

1:30 pm-3:29 pm

2 stops32h 59m

$499

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 1/13

8:05 am-9:25 am

2 stops18h 20m

Rome Fiumicino

Thu 1/22

12:50 pm-3:29 pm

1 stop33h 39m

$502

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 1/13

8:05 am-9:25 am

2 stops18h 20m

Rome Fiumicino

Thu 1/22

12:50 pm-3:29 pm

1 stop33h 39m

$503

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 12/30

5:16 am-10:45 am

1 stop22h 29m

Rome Fiumicino

Wed 1/14

6:40 pm-7:29 pm

2 stops31h 49m

$505

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 $710, 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 November is also cheap. Prices for this month can be found on momondo for an average of $716.

What is the cheapest day to depart on your flight to Rome?

The cheapest day to depart on your flight to Rome is on a Wednesday when prices can be found for as low as $1,109. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Rome on Sunday is $1,335.

What is the cheapest time of day to depart on your flight to Rome?

In the afternoon is the cheapest time of day to fly from St. Louis to Rome when you can find flight prices for as low as $1,209. Flying to Rome in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Rome are more costly in the evening, with an average ticket price of $1,328. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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 $1,012 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 $718 on momondo.

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

You could potentially save up to 20% 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

Direct flights

None
There are no direct flights from St. Louis to Rome. There are no popular flight routes from St. Louis to Rome.
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  • 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 45m 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
IberiaPriceFrom $536Free CancellationRating
7.0
3,011 reviews
Search Iberia flights
United AirlinesPriceFrom $549Free CancellationRating
7.4
9,016 reviews
Search United Airlines flights
KLMPriceFrom $566Free CancellationRating
7.7
1,410 reviews
Search KLM flights
DeltaPriceFrom $587Free CancellationRating
7.9
8,008 reviews
Search Delta flights
American AirlinesPriceFrom $665Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
LufthansaPriceFrom $671Free CancellationRating
6.8
7,572 reviews
Search Lufthansa flights
Air CanadaPriceFrom $705Free CancellationRating
7.1
10,444 reviews
Search Air Canada flights
British AirwaysPriceFrom $711Free CancellationRating
6.7
7,516 reviews
Search British Airways flights

Traveling to a place near Rome?

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

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