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Cheap flights from St. Louis to Rome from $369

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 1/18. 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
7:41 am - 9:25 am
STL
-
FCO
18h 44m
2 stops
Air Canada Logo
12:10 pm - 3:29 pm
FCO
-
STL
33h 19m
1 stop
$422Air Canada
Sun, Feb 22 - Tue, Mar 10
British Airways Logo
1:35 pm - 7:55 pm
STL
-
FCO
23h 20m
2 stops
British Airways Logo
1:10 pm - 11:04 pm
FCO
-
STL
16h 54m
1 stop
$433British Airways
Sun, Feb 1 - Tue, Feb 17
United Airlines Logo
8:30 am - 8:30 am
STL
-
FCO
17h 00m
1 stop
United Airlines Logo
1:10 pm - 11:59 pm
FCO
-
STL
41h 49m
2 stops
$442United Airlines
Sun, Feb 1 - Tue, Feb 17
United Airlines Logo
8:45 am - 9:25 am
STL
-
FCO
17h 40m
2 stops
United Airlines Logo
1:10 pm - 11:59 pm
FCO
-
STL
41h 49m
2 stops
$445United Airlines
Sun, Feb 1 - Tue, Feb 17
United Airlines Logo
8:45 am - 9:25 am
STL
-
FCO
17h 40m
2 stops
United Airlines Logo
1:10 pm - 11:59 pm
FCO
-
STL
41h 49m
2 stops
$446United Airlines
Sun, Feb 1 - Tue, Feb 17
Air Canada Logo
7:41 am - 9:25 am
STL
-
FCO
18h 44m
2 stops
Air Canada Logo
11:15 am - 10:59 pm
FCO
-
STL
18h 44m
2 stops
$455Air Canada
Tue, Feb 17 - Wed, Feb 25
United Airlines Logo
8:30 am - 8:30 am
STL
-
FCO
17h 00m
1 stop
United Airlines Logo
1:10 pm - 3:29 pm
FCO
-
STL
33h 19m
1 stop
$456United Airlines
Sun, Feb 1 - Tue, Feb 17
KLM Logo
6:00 am - 10:30 am
STL
-
FCO
21h 30m
1 stop
KLM Logo
12:40 pm - 11:36 pm
FCO
-
STL
17h 56m
1 stop
$457KLM
Sun, Feb 1 - Tue, Feb 17
KLM Logo
6:00 am - 10:30 am
STL
-
FCO
21h 30m
1 stop
KLM Logo
12:40 pm - 11:36 pm
FCO
-
STL
17h 56m
1 stop
$458KLM
Sun, Feb 1 - Tue, Feb 17
Multiple Airlines Logo
4:50 pm - 4:15 pm
STL
-
CIA
17h 25m
2 stops
Multiple Airlines Logo
4:00 pm - 3:24 pm
CIA
-
STL
30h 24m
3 stops
$2,578Multiple Airlines
Fri, Mar 27 - Mon, Apr 6

Finnair flights from St. Louis to Rome

Our best Finnair deals on St. Louis to Rome flight tickets
Finnair
Mar 17
STL11:46 amLambert-St Louis
24h 09m
2 stops
FCO5:55 pmRome Fiumicino
Mar 24
FCO6:40 pmRome Fiumicino
30h 49m
2 stops
STL7:29 pmLambert-St Louis
$465
Finnair
Mar 17
STL11:46 amLambert-St Louis
24h 09m
2 stops
FCO5:55 pmRome Fiumicino
Mar 24
FCO6:40 pmRome Fiumicino
30h 49m
2 stops
STL7:29 pmLambert-St Louis
$466

British Airways flights from St. Louis to Rome

Our best British Airways deals on St. Louis to Rome flight tickets
British Airways
Feb 1
STL1:35 pmLambert-St Louis
23h 20m
2 stops
FCO7:55 pmRome Fiumicino
Feb 17
FCO1:10 pmRome Fiumicino
16h 54m
1 stop
STL11:04 pmLambert-St Louis
$433
British Airways
Jan 21
STL11:05 amLambert-St Louis
22h 50m
2 stops
FCO4:55 pmRome Fiumicino
Jan 28
FCO7:50 amRome Fiumicino
20h 25m
2 stops
STL9:15 pmLambert-St Louis
$446
British Airways
Jan 21
STL6:44 pmLambert-St Louis
20h 11m
2 stops
FCO9:55 pmRome Fiumicino
Jan 28
FCO3:45 pmRome Fiumicino
36h 30m
2 stops
STL9:15 pmLambert-St Louis
$458

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 14, 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

Sun 2/22

7:41 am-9:25 am

2 stops18h 44m

Rome Fiumicino

Tue 3/10

12:10 pm-3:29 pm

1 stop33h 19m

$422

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/1

1:35 pm-7:55 pm

2 stops23h 20m

Rome Fiumicino

Tue 2/17

1:10 pm-11:04 pm

1 stop16h 54m

$433

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/1

8:30 am-8:30 am

1 stop17h 00m

Rome Fiumicino

Tue 2/17

1:10 pm-11:59 pm

2 stops41h 49m

$442

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/1

8:45 am-9:25 am

2 stops17h 40m

Rome Fiumicino

Tue 2/17

1:10 pm-11:59 pm

2 stops41h 49m

$445

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/1

8:45 am-9:25 am

2 stops17h 40m

Rome Fiumicino

Tue 2/17

1:10 pm-11:59 pm

2 stops41h 49m

$446

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 2/17

7:41 am-9:25 am

2 stops18h 44m

Rome Fiumicino

Wed 2/25

11:15 am-10:59 pm

2 stops18h 44m

$455

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/1

8:30 am-8:30 am

1 stop17h 00m

Rome Fiumicino

Tue 2/17

1:10 pm-3:29 pm

1 stop33h 19m

$456

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/1

6:00 am-10:30 am

1 stop21h 30m

Rome Fiumicino

Tue 2/17

12:40 pm-11:36 pm

1 stop17h 56m

$457

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/1

6:00 am-10:30 am

1 stop21h 30m

Rome Fiumicino

Tue 2/17

12:40 pm-11:36 pm

1 stop17h 56m

$458

St. LouisRome

STL - CIA

STLCIA

Lambert-St Louis

Fri 3/27

4:50 pm-4:15 pm

2 stops17h 25m

Rome Ciampino

Mon 4/6

4:00 pm-3:24 pm

3 stops30h 24m

$2,578

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 $964 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 $706 on momondo.

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

You could potentially save up to 34% 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

15h 11m

Direct flights

None
The fastest flight from St. Louis to Rome takes 15h 11m
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 15h 11m 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
LufthansaPriceFrom $506Free CancellationRating
6.8
7,714 reviews
Search Lufthansa flights
IberiaPriceFrom $536Free CancellationRating
7.0
3,087 reviews
Search Iberia flights
United AirlinesPriceFrom $549Free CancellationRating
7.4
9,162 reviews
Search United Airlines flights
KLMPriceFrom $555Free CancellationRating
7.7
1,439 reviews
Search KLM flights
DeltaPriceFrom $566Free CancellationRating
7.9
8,045 reviews
Search Delta flights
British AirwaysPriceFrom $663Free CancellationRating
6.7
7,676 reviews
Search British Airways flights
American AirlinesPriceFrom $665Free CancellationRating
7.2
11,125 reviews
Search American Airlines flights
Air CanadaPriceFrom $705Free CancellationRating
7.1
10,622 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
Santa Marinella
Grosseto
Sabaudia
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