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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.
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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.
British Airways Logo
2:24 pm - 7:35 pm
STL
-
FCO
22h 11m2 stops
British Airways Logo
1:10 pm - 11:04 pm
FCO
-
STL
15h 54m1 stop
$447British Airways
Mon, Mar 2 - Wed, Mar 11
Lufthansa Logo
3:50 pm - 8:00 pm
STL
-
FCO
21h 10m1 stop
Lufthansa Logo
10:30 am - 11:59 pm
FCO
-
STL
20h 29m1 stop
$448Lufthansa
Fri, Jan 9 - Wed, Jan 14
Lufthansa Logo
11:22 am - 7:55 am
STL
-
FCO
13h 33m1 stop
Lufthansa Logo
10:30 am - 11:59 pm
FCO
-
STL
20h 29m1 stop
$452Lufthansa
Wed, Jan 21 - Wed, Jan 28
Lufthansa Logo
3:50 pm - 8:00 pm
STL
-
FCO
21h 10m1 stop
Lufthansa Logo
9:45 am - 11:59 pm
FCO
-
STL
21h 14m2 stops
$455Lufthansa
Fri, Jan 9 - Wed, Jan 14
KLM Logo
9:59 am - 10:30 am
STL
-
FCO
17h 31m1 stop
KLM Logo
12:40 pm - 11:37 pm
FCO
-
STL
17h 57m1 stop
$456KLM
Wed, Jan 21 - Wed, Jan 28
British Airways Logo
6:46 pm - 7:40 pm
STL
-
FCO
17h 54m2 stops
British Airways Logo
5:50 pm - 6:14 pm
FCO
-
STL
31h 24m2 stops
$457British Airways
Tue, Jan 13 - Thu, Jan 22
Finnair Logo
11:46 am - 5:55 pm
STL
-
FCO
23h 09m2 stops
Finnair Logo
6:40 pm - 9:51 pm
FCO
-
STL
33h 11m2 stops
$463Finnair
Tue, Mar 3 - Tue, Mar 10
United Airlines Logo
9:55 am - 7:45 am
STL
-
FCO
14h 50m1 stop
United Airlines Logo
7:05 am - 2:55 pm
FCO
-
STL
13h 50m1 stop
$468United Airlines
Sun, Mar 1 - Fri, Mar 13
Multiple Airlines Logo
4:05 pm - 8:45 pm
STL
-
CIA
22h 40m3 stops
Multiple Airlines Logo
4:55 pm - 1:30 pm
CIA
-
STL
27h 35m2 stops
$846Multiple Airlines
Sat, Mar 28 - Sat, Apr 4
Multiple Airlines Logo
1:30 pm - 9:20 pm
STL
-
CIA
24h 50m3 stops
Multiple Airlines Logo
10:05 am - 1:30 pm
CIA
-
STL
34h 25m2 stops
$1,274Multiple Airlines
Fri, May 1 - Tue, May 12

United Airlines flights from St. Louis to Rome

Our best United Airlines deals on St. Louis to Rome flight tickets
United Airlines
Mar 1
STL9:55 amLambert-St Louis
14h 50m
1 stop
FCO7:45 amRome Fiumicino
Mar 13
FCO7:05 amRome Fiumicino
13h 50m
1 stop
STL2:55 pmLambert-St Louis
$468
Find similar
United Airlines
Mar 1
STL7:41 amLambert-St Louis
17h 49m
2 stops
FCO8:30 amRome Fiumicino
Mar 13
FCO12:20 pmRome Fiumicino
16h 39m
2 stops
STL10:59 pmLambert-St Louis
$476
Find similar
United Airlines
Jan 16
STL3:50 pmLambert-St Louis
18h 50m
1 stop
FCO5:40 pmRome Fiumicino
Jan 23
FCO10:30 amRome Fiumicino
17h 43m
2 stops
STL9:13 pmLambert-St Louis
$500
Find similar

British Airways flights from St. Louis to Rome

Our best British Airways deals on St. Louis to Rome flight tickets
British Airways
Mar 2
STL2:24 pmLambert-St Louis
22h 11m
2 stops
FCO7:35 pmRome Fiumicino
Mar 11
FCO1:10 pmRome Fiumicino
15h 54m
1 stop
STL11:04 pmLambert-St Louis
$447
Find similar
British Airways
Jan 13
STL6:46 pmLambert-St Louis
17h 54m
2 stops
FCO7:40 pmRome Fiumicino
Jan 22
FCO5:50 pmRome Fiumicino
31h 24m
2 stops
STL6:14 pmLambert-St Louis
$457
Find similar
British Airways
Jan 7
STL2:54 pmLambert-St Louis
24h 01m
2 stops
FCO9:55 pmRome Fiumicino
Jan 13
FCO8:25 pmRome Fiumicino
31h 50m
2 stops
STL9:15 pmLambert-St Louis
$459
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 December 4, 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

Mon 3/2

2:24 pm-7:35 pm

2 stops22h 11m

Rome Fiumicino

Wed 3/11

1:10 pm-11:04 pm

1 stop15h 54m

$447

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Fri 1/9

3:50 pm-8:00 pm

1 stop21h 10m

Rome Fiumicino

Wed 1/14

10:30 am-11:59 pm

1 stop20h 29m

$448

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 1/21

11:22 am-7:55 am

1 stop13h 33m

Rome Fiumicino

Wed 1/28

10:30 am-11:59 pm

1 stop20h 29m

$452

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Fri 1/9

3:50 pm-8:00 pm

1 stop21h 10m

Rome Fiumicino

Wed 1/14

9:45 am-11:59 pm

2 stops21h 14m

$455

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 1/21

9:59 am-10:30 am

1 stop17h 31m

Rome Fiumicino

Wed 1/28

12:40 pm-11:37 pm

1 stop17h 57m

$456

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 1/13

6:46 pm-7:40 pm

2 stops17h 54m

Rome Fiumicino

Thu 1/22

5:50 pm-6:14 pm

2 stops31h 24m

$457

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 3/3

11:46 am-5:55 pm

2 stops23h 09m

Rome Fiumicino

Tue 3/10

6:40 pm-9:51 pm

2 stops33h 11m

$463

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 3/1

9:55 am-7:45 am

1 stop14h 50m

Rome Fiumicino

Fri 3/13

7:05 am-2:55 pm

1 stop13h 50m

$468

St. LouisRome

STL - CIA

STLCIA

Lambert-St Louis

Sat 3/28

4:05 pm-8:45 pm

3 stops22h 40m

Rome Ciampino

Sat 4/4

4:55 pm-1:30 pm

2 stops27h 35m

$846

St. LouisRome

STL - CIA

STLCIA

Lambert-St Louis

Fri 5/1

1:30 pm-9:20 pm

3 stops24h 50m

Rome Ciampino

Tue 5/12

10:05 am-1:30 pm

2 stops34h 25m

$1,274

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 cheapest month to fly to Rome?

The cheapest month to fly to Rome from St. Louis is in November. Flight prices, which tend to average around $709, 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 November, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $710.

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 $1,005 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 $835 on momondo.

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 12h 40m 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
3,040 reviews
Search Iberia flights
United AirlinesPriceFrom $549Free CancellationRating
7.4
9,066 reviews
Search United Airlines flights
KLMPriceFrom $555Free CancellationRating
7.7
1,430 reviews
Search KLM flights
LufthansaPriceFrom $557Free CancellationRating
6.8
7,612 reviews
Search Lufthansa flights
DeltaPriceFrom $587Free CancellationRating
7.9
8,009 reviews
Search Delta flights
American AirlinesPriceFrom $665Free CancellationRating
7.2
11,044 reviews
Search American Airlines flights
Air CanadaPriceFrom $705Free CancellationRating
7.1
10,500 reviews
Search Air Canada flights
British AirwaysPriceFrom $711Free CancellationRating
6.7
7,562 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
Santa Marinella
Grosseto
Chianciano Terme
Sabaudia
Ascoli Piceno
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