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Cheap flights from St. Louis to Rome from $278

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 10/4. 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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Find the cheapest flights from St. Louis to Rome

Cheap round-trip flights

United Airlines Logo
3:23 pm - 1:05 pmSTL-FCO
14h 42m2 stops
United Airlines Logo
7:05 am - 1:55 pmFCO-STL
13h 50m1 stop
$532United Airlines
Find Deal
Mon, Oct 20 - Wed, Nov 5
United Airlines Logo
9:20 am - 8:15 amSTL-FCO
15h 55m2 stops
United Airlines Logo
7:05 am - 5:39 pmFCO-STL
17h 34m2 stops
$534United Airlines
Find Deal
Mon, Oct 20 - Wed, Nov 5
Iberia Logo
10:49 am - 9:00 amSTL-FCO
15h 11m1 stop
Iberia Logo
11:35 am - 8:21 pmFCO-STL
15h 46m1 stop
$564Iberia
Find Deal
Tue, Dec 2 - Thu, Dec 11
Delta Logo
3:59 pm - 11:05 amSTL-FCO
12h 06m1 stop
Delta Logo
9:20 am - 8:13 amFCO-STL
29h 53m1 stop
$568Delta
Find Deal
Mon, Oct 20 - Wed, Nov 5
Iberia Logo
10:44 am - 9:00 amSTL-FCO
15h 16m1 stop
Iberia Logo
1:10 pm - 11:04 pmFCO-STL
16h 54m1 stop
$569Iberia
Find Deal
Sun, Nov 9 - Fri, Nov 21
Air Canada Logo
4:05 pm - 8:55 amSTL-FCO
57h 50m2 stops
Air Canada Logo
7:05 am - 3:29 pmFCO-STL
39h 24m2 stops
$577Air Canada
Find Deal
Mon, Nov 10 - Tue, Nov 18
Air Canada Logo
4:05 pm - 9:25 amSTL-FCO
34h 20m2 stops
Air Canada Logo
12:45 pm - 3:40 pmFCO-STL
33h 55m2 stops
$611Air Canada
Find Deal
Thu, Dec 4 - Tue, Dec 9
American Airlines Logo
6:00 am - 9:00 amSTL-FCO
20h 00m1 stop
American Airlines Logo
1:10 pm - 8:56 amFCO-STL
26h 46m1 stop
$631American Airlines
Find Deal
Sat, Dec 13 - Tue, Dec 23
American Airlines Logo
9:43 am - 8:05 amSTL-FCO
15h 22m1 stop
American Airlines Logo
12:10 pm - 11:58 pmFCO-STL
18h 48m1 stop
$665American Airlines
Find Deal
Tue, Oct 7 - Thu, Oct 16
Delta Logo
10:45 am - 10:05 amSTL-FCO
16h 20m2 stops
Delta Logo
9:45 am - 5:47 pmFCO-STL
15h 02m1 stop
$670Delta
Find Deal
Wed, Oct 8 - Thu, Oct 16

United Airlines flights from St. Louis to Rome

Our best United Airlines deals on St. Louis to Rome flight tickets
United Airlines
Oct 20
STL3:23 pmLambert-St Louis
14h 42m
2 stops
FCO1:05 pmRome Fiumicino
Nov 5
FCO7:05 amRome Fiumicino
13h 50m
1 stop
STL1:55 pmLambert-St Louis
$532
Find similar
United Airlines
Oct 20
STL9:20 amLambert-St Louis
15h 55m
2 stops
FCO8:15 amRome Fiumicino
Nov 5
FCO7:05 amRome Fiumicino
17h 34m
2 stops
STL5:39 pmLambert-St Louis
$534
Find similar
United Airlines
Oct 20
STL12:25 pmLambert-St Louis
12h 30m
1 stop
FCO7:55 amRome Fiumicino
Nov 5
FCO7:05 amRome Fiumicino
13h 50m
1 stop
STL1:55 pmLambert-St Louis
$536
Find similar

British Airways flights from St. Louis to Rome

Our best British Airways deals on St. Louis to Rome flight tickets
British Airways
Sep 26
STL3:59 pmLambert-St Louis
24h 31m
2 stops
FCO11:30 pmRome Fiumicino
Sep 30
FCO9:05 pmRome Fiumicino
28h 27m
2 stops
STL6:32 pmLambert-St Louis
$886
Find similar
British Airways
Sep 26
STL3:59 pmLambert-St Louis
23h 36m
2 stops
FCO10:35 pmRome Fiumicino
Oct 6
FCO8:30 pmRome Fiumicino
29h 16m
2 stops
STL6:46 pmLambert-St Louis
$1,032
Find similar
British Airways
Sep 26
STL3:59 pmLambert-St Louis
24h 31m
2 stops
FCO11:30 pmRome Fiumicino
Oct 6
FCO8:30 pmRome Fiumicino
26h 53m
2 stops
STL4:23 pmLambert-St Louis
$1,058
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 September 17, 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 10/20

3:23 pm-1:05 pm

2 stops14h 42m

Rome Fiumicino

Wed 11/5

7:05 am-1:55 pm

1 stop13h 50m

$532

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 10/20

9:20 am-8:15 am

2 stops15h 55m

Rome Fiumicino

Wed 11/5

7:05 am-5:39 pm

2 stops17h 34m

$534

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 12/2

10:49 am-9:00 am

1 stop15h 11m

Rome Fiumicino

Thu 12/11

11:35 am-8:21 pm

1 stop15h 46m

$564

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 10/20

3:59 pm-11:05 am

1 stop12h 06m

Rome Fiumicino

Wed 11/5

9:20 am-8:13 am

1 stop29h 53m

$568

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/9

10:44 am-9:00 am

1 stop15h 16m

Rome Fiumicino

Fri 11/21

1:10 pm-11:04 pm

1 stop16h 54m

$569

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 11/10

4:05 pm-8:55 am

2 stops57h 50m

Rome Fiumicino

Tue 11/18

7:05 am-3:29 pm

2 stops39h 24m

$577

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Thu 12/4

4:05 pm-9:25 am

2 stops34h 20m

Rome Fiumicino

Tue 12/9

12:45 pm-3:40 pm

2 stops33h 55m

$611

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 12/13

6:00 am-9:00 am

1 stop20h 00m

Rome Fiumicino

Tue 12/23

1:10 pm-8:56 am

1 stop26h 46m

$631

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 10/7

9:43 am-8:05 am

1 stop15h 22m

Rome Fiumicino

Thu 10/16

12:10 pm-11:58 pm

1 stop18h 48m

$665

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 10/8

10:45 am-10:05 am

2 stops16h 20m

Rome Fiumicino

Thu 10/16

9:45 am-5:47 pm

1 stop15h 02m

$670

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 $737, 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 November is also cheap. Prices for this month can be found on momondo for an average of $740.

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 $1,034 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 $736 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

Direct flights

None
There are no direct flights from St. Louis to Rome. There are no popular flight routes from St. Louis to Rome.
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  • 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
IberiaPriceFrom $536Free CancellationRating
7.0
2,925 reviews
Search Iberia flights
United AirlinesPriceFrom $559Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
DeltaPriceFrom $587Free CancellationRating
7.9
7,961 reviews
Search Delta flights
KLMPriceFrom $604Free CancellationRating
7.8
1,386 reviews
Search KLM flights
American AirlinesPriceFrom $665Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
LufthansaPriceFrom $671Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
Air CanadaPriceFrom $705Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
British AirwaysPriceFrom $711Free CancellationRating
6.7
7,367 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
Ponza
Gaeta
Pienza
Tivoli
Sperlonga
Ciampino
Orvieto
Montepulciano
Cortona
Ascoli Piceno
Saturnia
Santa Marinella
Grosseto
Anzio
Sabaudia
Terracina
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