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Cheap flights from St. Louis to Rome from $302

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 2/21. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:05 pm - 11:05 am
STL
-
FCO
12h 00m
1 stop
Multiple Airlines Logo
7:05 am - 1:55 pm
FCO
-
STL
13h 50m
1 stop
$481Multiple Airlines
Wed, Feb 25 - Fri, Mar 6
Multiple Airlines Logo
4:05 pm - 11:05 am
STL
-
FCO
12h 00m
1 stop
Multiple Airlines Logo
7:05 am - 1:55 pm
FCO
-
STL
13h 50m
1 stop
$482Multiple Airlines
Wed, Feb 25 - Fri, Mar 6
Multiple Airlines Logo
4:05 pm - 11:05 am
STL
-
FCO
12h 00m
1 stop
Multiple Airlines Logo
7:05 am - 1:55 pm
FCO
-
STL
13h 50m
1 stop
$485Multiple Airlines
Wed, Feb 25 - Wed, Mar 4
United Airlines Logo
7:41 am - 7:45 am
STL
-
FCO
17h 04m
1 stop
United Airlines Logo
1:15 pm - 2:42 pm
FCO
-
STL
32h 27m
2 stops
$488United Airlines
Wed, Feb 25 - Wed, Mar 4
United Airlines Logo
6:00 am - 8:30 am
STL
-
FCO
19h 30m
2 stops
United Airlines Logo
1:15 pm - 7:14 pm
FCO
-
STL
36h 59m
2 stops
$493United Airlines
Wed, Feb 25 - Fri, Mar 6
Air Canada Logo
7:41 am - 11:05 am
STL
-
FCO
20h 24m
2 stops
Air Canada Logo
1:15 pm - 2:42 pm
FCO
-
STL
32h 27m
2 stops
$496Air Canada
Wed, Feb 25 - Wed, Mar 4
United Airlines Logo
7:41 am - 7:45 am
STL
-
FCO
17h 04m
1 stop
United Airlines Logo
7:05 am - 1:55 pm
FCO
-
STL
13h 50m
1 stop
$497United Airlines
Wed, Feb 25 - Wed, Mar 4
Multiple Airlines Logo
7:41 am - 11:05 am
STL
-
FCO
20h 24m
2 stops
Multiple Airlines Logo
7:05 am - 1:55 pm
FCO
-
STL
13h 50m
1 stop
$501Multiple Airlines
Wed, Feb 25 - Fri, Mar 6
Multiple Airlines Logo
7:41 am - 11:05 am
STL
-
FCO
20h 24m
2 stops
Multiple Airlines Logo
7:05 am - 4:23 pm
FCO
-
STL
16h 18m
2 stops
$506Multiple Airlines
Wed, Feb 25 - Fri, Mar 6
Delta Logo
10:13 am - 10:30 am
STL
-
FCO
17h 17m
1 stop
Delta Logo
6:10 am - 8:43 pm
FCO
-
STL
21h 33m
2 stops
$510Delta
Tue, Feb 24 - Sun, Mar 1

United Airlines flights from St. Louis to Rome

Our best United Airlines deals on St. Louis to Rome flight tickets
United Airlines
Feb 25
STL7:41 amLambert-St Louis
17h 04m
1 stop
FCO7:45 amRome Fiumicino
Mar 4
FCO1:15 pmRome Fiumicino
32h 27m
2 stops
STL2:42 pmLambert-St Louis
$488
United Airlines
Feb 25
STL6:00 amLambert-St Louis
19h 30m
2 stops
FCO8:30 amRome Fiumicino
Mar 6
FCO1:15 pmRome Fiumicino
36h 59m
2 stops
STL7:14 pmLambert-St Louis
$493
United Airlines
Feb 25
STL7:41 amLambert-St Louis
17h 04m
1 stop
FCO7:45 amRome Fiumicino
Mar 4
FCO7:05 amRome Fiumicino
13h 50m
1 stop
STL1:55 pmLambert-St Louis
$497

Delta flights from St. Louis to Rome

Our best Delta deals on St. Louis to Rome flight tickets
Delta
Feb 24
STL10:13 amLambert-St Louis
17h 17m
1 stop
FCO10:30 amRome Fiumicino
Mar 1
FCO6:10 amRome Fiumicino
21h 33m
2 stops
STL8:43 pmLambert-St Louis
$510
Delta
Mar 3
STL11:23 amLambert-St Louis
17h 22m
2 stops
FCO11:45 amRome Fiumicino
Mar 10
FCO11:40 amRome Fiumicino
15h 26m
1 stop
STL9:06 pmLambert-St Louis
$513
Delta
Feb 24
STL11:23 amLambert-St Louis
17h 22m
2 stops
FCO11:45 amRome Fiumicino
Mar 2
FCO10:05 amRome Fiumicino
17h 38m
2 stops
STL8:43 pmLambert-St Louis
$514

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 29, 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

4:05 pm-11:05 am

1 stop12h 00m

Rome Fiumicino

Fri 3/6

7:05 am-1:55 pm

1 stop13h 50m

$481

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 2/25

4:05 pm-11:05 am

1 stop12h 00m

Rome Fiumicino

Fri 3/6

7:05 am-1:55 pm

1 stop13h 50m

$482

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 2/25

4:05 pm-11:05 am

1 stop12h 00m

Rome Fiumicino

Wed 3/4

7:05 am-1:55 pm

1 stop13h 50m

$485

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-2:42 pm

2 stops32h 27m

$488

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 2/25

6:00 am-8:30 am

2 stops19h 30m

Rome Fiumicino

Fri 3/6

1:15 pm-7:14 pm

2 stops36h 59m

$493

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 2/25

7:41 am-11:05 am

2 stops20h 24m

Rome Fiumicino

Wed 3/4

1:15 pm-2:42 pm

2 stops32h 27m

$496

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

7:05 am-1:55 pm

1 stop13h 50m

$497

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 2/25

7:41 am-11:05 am

2 stops20h 24m

Rome Fiumicino

Fri 3/6

7:05 am-1:55 pm

1 stop13h 50m

$501

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 2/25

7:41 am-11:05 am

2 stops20h 24m

Rome Fiumicino

Fri 3/6

7:05 am-4:23 pm

2 stops16h 18m

$506

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 2/24

10:13 am-10:30 am

1 stop17h 17m

Rome Fiumicino

Sun 3/1

6:10 am-8:43 pm

2 stops21h 33m

$510

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 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 $946 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 $731 on momondo.

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

You could potentially save up to 16% 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 00m

Direct flights

None
The fastest flight from St. Louis to Rome takes 12h 00m
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 00m 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 $481Free CancellationRating
6.7
7,705 reviews
Search British Airways flights
LufthansaPriceFrom $506Free CancellationRating
6.8
7,754 reviews
Search Lufthansa flights
KLMPriceFrom $506Free CancellationRating
7.7
1,443 reviews
Search KLM flights
United AirlinesPriceFrom $549Free CancellationRating
7.4
9,214 reviews
Search United Airlines flights
DeltaPriceFrom $566Free CancellationRating
7.9
8,128 reviews
Search Delta flights
American AirlinesPriceFrom $665Free CancellationRating
7.2
11,206 reviews
Search American Airlines flights
Air CanadaPriceFrom $705Free CancellationRating
7.1
10,667 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
Grosseto
Sabaudia
Santa Marinella
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