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Cheap flights from St. Louis to Rome from $310

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 4/22. 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.
United Airlines Logo
7:41 am - 7:45 am
STL
-
FCO
17h 04m1 stop
United Airlines Logo
1:15 pm - 9:07 pm
FCO
-
STL
38h 52m2 stops
$438United Airlines
Wed, Feb 25 - Wed, Mar 4
United Airlines Logo
12:44 pm - 8:30 am
STL
-
FCO
12h 46m1 stop
United Airlines Logo
1:10 pm - 2:30 pm
FCO
-
STL
32h 20m2 stops
$443United Airlines
Tue, Jan 27 - Tue, Feb 3
British Airways Logo
1:35 pm - 7:35 pm
STL
-
FCO
23h 00m2 stops
British Airways Logo
1:10 pm - 10:52 pm
FCO
-
STL
16h 42m1 stop
$445British Airways
Mon, Feb 2 - Fri, Feb 13
British Airways Logo
9:33 am - 12:25 pm
STL
-
FCO
19h 52m2 stops
British Airways Logo
1:10 pm - 11:04 pm
FCO
-
STL
16h 54m1 stop
$446British Airways
Sun, Feb 8 - Wed, Feb 18
British Airways Logo
1:29 pm - 4:55 pm
STL
-
FCO
20h 26m2 stops
British Airways Logo
1:10 pm - 5:21 pm
FCO
-
STL
35h 11m1 stop
$455British Airways
Wed, Apr 15 - Thu, Apr 23
United Airlines Logo
8:30 am - 8:30 am
STL
-
FCO
17h 00m1 stop
United Airlines Logo
1:10 pm - 3:15 pm
FCO
-
STL
33h 05m1 stop
$456United Airlines
Tue, Jan 27 - Tue, Feb 3
KLM Logo
9:59 am - 10:30 am
STL
-
FCO
17h 31m1 stop
KLM Logo
12:40 pm - 8:37 pm
FCO
-
STL
14h 57m1 stop
$458KLM
Wed, Jan 21 - Wed, Jan 28
British Airways Logo
3:20 pm - 9:55 pm
STL
-
FCO
23h 35m2 stops
British Airways Logo
5:50 pm - 9:15 pm
FCO
-
STL
34h 25m2 stops
$459British Airways
Tue, Jan 20 - Tue, Jan 27
KLM Logo
7:10 am - 10:30 am
STL
-
FCO
20h 20m1 stop
KLM Logo
12:00 pm - 11:37 pm
FCO
-
STL
18h 37m2 stops
$462KLM
Wed, Jan 21 - Wed, Jan 28
Air Canada Logo
4:05 pm - 9:15 am
STL
-
FCO
34h 10m2 stops
Air Canada Logo
12:25 pm - 3:24 pm
FCO
-
STL
33h 59m1 stop
$463Air Canada
Tue, Apr 14 - Thu, Apr 23

KLM flights from St. Louis to Rome

Our best KLM deals on St. Louis to Rome flight tickets
KLM
Jan 21
STL9:59 amLambert-St Louis
17h 31m
1 stop
FCO10:30 amRome Fiumicino
Jan 28
FCO12:40 pmRome Fiumicino
14h 57m
1 stop
STL8:37 pmLambert-St Louis
$458
KLM
Jan 21
STL7:10 amLambert-St Louis
20h 20m
1 stop
FCO10:30 amRome Fiumicino
Jan 28
FCO12:00 pmRome Fiumicino
18h 37m
2 stops
STL11:37 pmLambert-St Louis
$462
KLM
Jan 20
STL1:00 pmLambert-St Louis
14h 30m
1 stop
FCO10:30 amRome Fiumicino
Jan 23
FCO12:40 pmRome Fiumicino
17h 57m
1 stop
STL11:37 pmLambert-St Louis
$1,147

British Airways flights from St. Louis to Rome

Our best British Airways deals on St. Louis to Rome flight tickets
British Airways
Feb 2
STL1:35 pmLambert-St Louis
23h 00m
2 stops
FCO7:35 pmRome Fiumicino
Feb 13
FCO1:10 pmRome Fiumicino
16h 42m
1 stop
STL10:52 pmLambert-St Louis
$445
British Airways
Feb 8
STL9:33 amLambert-St Louis
19h 52m
2 stops
FCO12:25 pmRome Fiumicino
Feb 18
FCO1:10 pmRome Fiumicino
16h 54m
1 stop
STL11:04 pmLambert-St Louis
$446
British Airways
Apr 15
STL1:29 pmLambert-St Louis
20h 26m
2 stops
FCO4:55 pmRome Fiumicino
Apr 23
FCO1:10 pmRome Fiumicino
35h 11m
1 stop
STL5:21 pmLambert-St Louis
$455

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 8, 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

7:41 am-7:45 am

1 stop17h 04m

Rome Fiumicino

Wed 3/4

1:15 pm-9:07 pm

2 stops38h 52m

$438

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 1/27

12:44 pm-8:30 am

1 stop12h 46m

Rome Fiumicino

Tue 2/3

1:10 pm-2:30 pm

2 stops32h 20m

$443

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 2/2

1:35 pm-7:35 pm

2 stops23h 00m

Rome Fiumicino

Fri 2/13

1:10 pm-10:52 pm

1 stop16h 42m

$445

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/8

9:33 am-12:25 pm

2 stops19h 52m

Rome Fiumicino

Wed 2/18

1:10 pm-11:04 pm

1 stop16h 54m

$446

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 4/15

1:29 pm-4:55 pm

2 stops20h 26m

Rome Fiumicino

Thu 4/23

1:10 pm-5:21 pm

1 stop35h 11m

$455

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 1/27

8:30 am-8:30 am

1 stop17h 00m

Rome Fiumicino

Tue 2/3

1:10 pm-3:15 pm

1 stop33h 05m

$456

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-8:37 pm

1 stop14h 57m

$458

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 1/20

3:20 pm-9:55 pm

2 stops23h 35m

Rome Fiumicino

Tue 1/27

5:50 pm-9:15 pm

2 stops34h 25m

$459

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 1/21

7:10 am-10:30 am

1 stop20h 20m

Rome Fiumicino

Wed 1/28

12:00 pm-11:37 pm

2 stops18h 37m

$462

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 4/14

4:05 pm-9:15 am

2 stops34h 10m

Rome Fiumicino

Thu 4/23

12:25 pm-3:24 pm

1 stop33h 59m

$463

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 January. Flight prices, which tend to average around $693, 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 January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $700.

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 $962 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

12h 46m

Direct flights

None
The fastest flight from St. Louis to Rome takes 12h 46m
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 46m 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 $472Free CancellationRating
6.7
7,659 reviews
Search British Airways flights
LufthansaPriceFrom $506Free CancellationRating
6.8
7,698 reviews
Search Lufthansa flights
IberiaPriceFrom $536Free CancellationRating
7.0
3,079 reviews
Search Iberia flights
United AirlinesPriceFrom $549Free CancellationRating
7.4
9,142 reviews
Search United Airlines flights
KLMPriceFrom $555Free CancellationRating
7.7
1,434 reviews
Search KLM flights
DeltaPriceFrom $587Free CancellationRating
7.9
8,032 reviews
Search Delta flights
American AirlinesPriceFrom $665Free CancellationRating
7.2
11,097 reviews
Search American Airlines flights
Air CanadaPriceFrom $705Free CancellationRating
7.1
10,603 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
Ponza
Montepulciano
Tivoli
Sperlonga
Gaeta
Orvieto
Cortona
Terracina
Chianciano Terme
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