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Cheap flights from St. Louis to Rome from $347

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 2/18. 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
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
KLM Logo
7:10 am - 10:30 am
STL
-
FCO
20h 20m1 stop
KLM Logo
12:40 pm - 11:37 pm
FCO
-
STL
17h 57m1 stop
$458KLM
Wed, Jan 21 - Wed, Jan 28
British Airways Logo
6:46 pm - 7:40 pm
STL
-
FCO
17h 54m2 stops
British Airways Logo
7:40 am - 9:15 pm
FCO
-
STL
20h 35m2 stops
$459British Airways
Tue, Jan 13 - Thu, Jan 22
KLM Logo
9:59 am - 9:45 am
STL
-
FCO
16h 46m2 stops
KLM Logo
12:40 pm - 8:37 pm
FCO
-
STL
14h 57m1 stop
$462KLM
Tue, Feb 3 - Tue, Feb 10
Finnair Logo
11:46 am - 5:55 pm
STL
-
FCO
24h 09m2 stops
Finnair Logo
6:40 pm - 11:56 pm
FCO
-
STL
35h 16m2 stops
$466Finnair
Tue, Mar 17 - Tue, Mar 24
British Airways Logo
9:33 am - 12:20 pm
STL
-
FCO
19h 47m2 stops
British Airways Logo
1:10 pm - 10:52 pm
FCO
-
STL
16h 42m1 stop
$470British Airways
Tue, Feb 3 - Sat, Feb 14
Iberia Logo
9:34 am - 7:30 pm
STL
-
FCO
26h 56m2 stops
Iberia Logo
4:20 pm - 11:13 am
FCO
-
STL
25h 53m2 stops
$480Iberia
Mon, Feb 2 - Mon, Feb 9
Delta Logo
12:00 pm - 10:30 am
STL
-
FCO
15h 30m1 stop
Delta Logo
12:40 pm - 8:37 pm
FCO
-
STL
14h 57m1 stop
$483Delta
Mon, Feb 2 - Mon, Feb 9
British Airways Logo
12:11 pm - 4:55 pm
STL
-
FCO
21h 44m2 stops
British Airways Logo
8:50 pm - 11:48 pm
FCO
-
STL
33h 58m2 stops
$484British Airways
Fri, Feb 6 - Mon, Feb 16
Multiple Airlines Logo
1:15 pm - 10:00 pm
STL
-
FCO
25h 45m2 stops
Multiple Airlines Logo
11:15 am - 2:30 pm
FCO
-
STL
34h 15m2 stops
$489Multiple Airlines
Mon, Feb 2 - Mon, Feb 9

British Airways flights from St. Louis to Rome

Our best British Airways deals on St. Louis to Rome flight tickets
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
Find similar
British Airways
Feb 8
STL5:20 pmLambert-St Louis
17h 30m
2 stops
FCO5:50 pmRome Fiumicino
Feb 18
FCO7:50 amRome Fiumicino
22h 58m
2 stops
STL11:48 pmLambert-St Louis
$459
Find similar
British Airways
Feb 6
STL12:11 pmLambert-St Louis
21h 44m
2 stops
FCO4:55 pmRome Fiumicino
Feb 16
FCO8:50 pmRome Fiumicino
33h 58m
2 stops
STL11:48 pmLambert-St Louis
$484
Find similar

Iberia flights from St. Louis to Rome

Our best Iberia deals on St. Louis to Rome flight tickets
Iberia
Feb 2
STL9:34 amLambert-St Louis
26h 56m
2 stops
FCO7:30 pmRome Fiumicino
Feb 9
FCO4:20 pmRome Fiumicino
25h 53m
2 stops
STL11:13 amLambert-St Louis
$480
Find similar
Iberia
Feb 20
STL2:00 pmLambert-St Louis
12h 00m
1 stop
FCO9:00 amRome Fiumicino
Feb 22
FCO8:20 pmRome Fiumicino
31h 52m
2 stops
STL9:12 pmLambert-St Louis
$527
Find similar
Iberia
Jan 9
STL2:54 pmLambert-St Louis
16h 01m
2 stops
FCO1:55 pmRome Fiumicino
Jan 16
FCO7:10 pmRome Fiumicino
34h 34m
2 stops
STL10:44 pmLambert-St Louis
$1,323
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 January 6, 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 2/8

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 1/21

7:10 am-10:30 am

1 stop20h 20m

Rome Fiumicino

Wed 1/28

12:40 pm-11:37 pm

1 stop17h 57m

$458

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

7:40 am-9:15 pm

2 stops20h 35m

$459

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 2/3

9:59 am-9:45 am

2 stops16h 46m

Rome Fiumicino

Tue 2/10

12:40 pm-8:37 pm

1 stop14h 57m

$462

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 3/17

11:46 am-5:55 pm

2 stops24h 09m

Rome Fiumicino

Tue 3/24

6:40 pm-11:56 pm

2 stops35h 16m

$466

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 2/3

9:33 am-12:20 pm

2 stops19h 47m

Rome Fiumicino

Sat 2/14

1:10 pm-10:52 pm

1 stop16h 42m

$470

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 2/2

9:34 am-7:30 pm

2 stops26h 56m

Rome Fiumicino

Mon 2/9

4:20 pm-11:13 am

2 stops25h 53m

$480

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 2/2

12:00 pm-10:30 am

1 stop15h 30m

Rome Fiumicino

Mon 2/9

12:40 pm-8:37 pm

1 stop14h 57m

$483

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Fri 2/6

12:11 pm-4:55 pm

2 stops21h 44m

Rome Fiumicino

Mon 2/16

8:50 pm-11:48 pm

2 stops33h 58m

$484

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 2/2

1:15 pm-10:00 pm

2 stops25h 45m

Rome Fiumicino

Mon 2/9

11:15 am-2:30 pm

2 stops34h 15m

$489

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 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 50m

Direct flights

None
The fastest flight from St. Louis to Rome takes 12h 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 12h 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 $472Free CancellationRating
6.7
7,657 reviews
Search British Airways flights
LufthansaPriceFrom $506Free CancellationRating
6.8
7,683 reviews
Search Lufthansa flights
IberiaPriceFrom $536Free CancellationRating
7.0
3,073 reviews
Search Iberia flights
United AirlinesPriceFrom $549Free CancellationRating
7.4
9,134 reviews
Search United Airlines flights
KLMPriceFrom $555Free CancellationRating
7.7
1,434 reviews
Search KLM flights
DeltaPriceFrom $587Free CancellationRating
7.9
8,017 reviews
Search Delta flights
American AirlinesPriceFrom $665Free CancellationRating
7.2
11,083 reviews
Search American Airlines flights
Air CanadaPriceFrom $705Free CancellationRating
7.1
10,598 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