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Cheap flights from St. Louis to Rome from $268

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 10/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from St. Louis to Rome

Cheap round-trip flights

Logo
6:42 pm - 9:25 amSTL-FCO
31h 43m2 stops
Logo
12:50 pm - 9:40 pmFCO-STL
39h 50m2 stops
$582
Find Deal
Tue, Dec 2 - Fri, Dec 12
United Airlines Logo
5:24 pm - 7:45 amSTL-FCO
31h 21m1 stop
United Airlines Logo
12:50 pm - 3:40 pmFCO-STL
33h 50m2 stops
$587United Airlines
Find Deal
Sat, Nov 29 - Fri, Dec 12
United Airlines Logo
8:00 am - 7:45 amSTL-FCO
16h 45m1 stop
United Airlines Logo
12:45 pm - 3:40 pmFCO-STL
33h 55m2 stops
$589United Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
Air Canada Logo
4:05 pm - 8:55 amSTL-FCO
33h 50m2 stops
Air Canada Logo
12:45 pm - 3:40 pmFCO-STL
33h 55m2 stops
$591Air Canada
Find Deal
Sat, Nov 29 - Tue, Dec 9
United Airlines Logo
5:24 pm - 7:45 amSTL-FCO
31h 21m1 stop
United Airlines Logo
12:45 pm - 3:40 pmFCO-STL
33h 55m2 stops
$594United Airlines
Find Deal
Sat, Nov 29 - Tue, Dec 9
Air Canada Logo
4:05 pm - 11:05 amSTL-FCO
12h 00m1 stop
Air Canada Logo
12:45 pm - 3:29 pmFCO-STL
33h 44m1 stop
$604Air Canada
Find Deal
Mon, Dec 1 - Tue, Dec 9
American Airlines Logo
6:00 am - 9:00 amSTL-FCO
20h 00m1 stop
American Airlines Logo
1:10 pm - 12:05 amFCO-STL
17h 55m2 stops
$610American Airlines
Find Deal
Sun, Nov 9 - Fri, Nov 21
Delta Logo
6:40 am - 8:45 amSTL-FCO
20h 05m2 stops
Delta Logo
12:00 pm - 10:26 amFCO-STL
29h 26m2 stops
$620Delta
Find Deal
Tue, Oct 28 - Tue, Nov 4
Delta Logo
7:05 am - 9:30 amSTL-FCO
20h 25m1 stop
Delta Logo
12:40 pm - 9:38 pmFCO-STL
15h 58m1 stop
$665Delta
Find Deal
Thu, Oct 30 - Thu, Nov 6
Iberia Logo
1:55 pm - 6:10 pmSTL-FCO
21h 15m2 stops
Iberia Logo
7:30 am - 10:22 pmFCO-STL
21h 52m2 stops
$677Iberia
Find Deal
Fri, Dec 5 - Wed, Dec 10

British Airways flights from St. Louis to Rome

Our best British Airways deals on St. Louis to Rome flight tickets
British Airways
Nov 9
STL10:45 amLambert-St Louis
15h 15m
1 stop
FCO9:00 amRome Fiumicino
Nov 21
FCO1:10 pmRome Fiumicino
14h 45m
1 stop
STL8:55 pmLambert-St Louis
$600
Find similar
British Airways
Sep 3
STL1:03 pmLambert-St Louis
12h 17m
1 stop
FCO8:20 amRome Fiumicino
Sep 10
FCO10:00 amRome Fiumicino
17h 15m
1 stop
STL8:15 pmLambert-St Louis
$760
Find similar
British Airways
Aug 22
STL1:15 pmLambert-St Louis
15h 05m
1 stop
FCO11:20 amRome Fiumicino
Aug 24
FCO12:10 pmRome Fiumicino
18h 41m
2 stops
STL11:51 pmLambert-St Louis
$1,455
Find similar

Air Canada flights from St. Louis to Rome

Our best Air Canada deals on St. Louis to Rome flight tickets
Air Canada
Nov 29
STL4:05 pmLambert-St Louis
33h 50m
2 stops
FCO8:55 amRome Fiumicino
Dec 9
FCO12:45 pmRome Fiumicino
33h 55m
2 stops
STL3:40 pmLambert-St Louis
$591
Find similar
Air Canada
Dec 1
STL4:05 pmLambert-St Louis
12h 00m
1 stop
FCO11:05 amRome Fiumicino
Dec 9
FCO12:45 pmRome Fiumicino
33h 44m
1 stop
STL3:29 pmLambert-St Louis
$604
Find similar
Air Canada
Dec 3
STL4:05 pmLambert-St Louis
14h 55m
2 stops
FCO2:00 pmRome Fiumicino
Dec 9
FCO12:45 pmRome Fiumicino
32h 40m
2 stops
STL2:25 pmLambert-St Louis
$611
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 August 20, 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

Tue 12/2

6:42 pm-9:25 am

2 stops31h 43m

Rome Fiumicino

Fri 12/12

12:50 pm-9:40 pm

2 stops39h 50m

$582

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 11/29

5:24 pm-7:45 am

1 stop31h 21m

Rome Fiumicino

Fri 12/12

12:50 pm-3:40 pm

2 stops33h 50m

$587

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 12/2

8:00 am-7:45 am

1 stop16h 45m

Rome Fiumicino

Tue 12/9

12:45 pm-3:40 pm

2 stops33h 55m

$589

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 11/29

4:05 pm-8:55 am

2 stops33h 50m

Rome Fiumicino

Tue 12/9

12:45 pm-3:40 pm

2 stops33h 55m

$591

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 11/29

5:24 pm-7:45 am

1 stop31h 21m

Rome Fiumicino

Tue 12/9

12:45 pm-3:40 pm

2 stops33h 55m

$594

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 12/1

4:05 pm-11:05 am

1 stop12h 00m

Rome Fiumicino

Tue 12/9

12:45 pm-3:29 pm

1 stop33h 44m

$604

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/9

6:00 am-9:00 am

1 stop20h 00m

Rome Fiumicino

Fri 11/21

1:10 pm-12:05 am

2 stops17h 55m

$610

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 10/28

6:40 am-8:45 am

2 stops20h 05m

Rome Fiumicino

Tue 11/4

12:00 pm-10:26 am

2 stops29h 26m

$620

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Thu 10/30

7:05 am-9:30 am

1 stop20h 25m

Rome Fiumicino

Thu 11/6

12:40 pm-9:38 pm

1 stop15h 58m

$665

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Fri 12/5

1:55 pm-6:10 pm

2 stops21h 15m

Rome Fiumicino

Wed 12/10

7:30 am-10:22 pm

2 stops21h 52m

$677

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 November. Flight prices, which tend to average around $740, 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 $741.

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 $1,044 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 $838 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 11h 16m 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
2,887 reviews
Search Iberia flights
United AirlinesPriceFrom $559Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights
DeltaPriceFrom $587Free CancellationRating
7.9
7,982 reviews
Search Delta flights
KLMPriceFrom $664Free CancellationRating
7.8
1,388 reviews
Search KLM flights
American AirlinesPriceFrom $665Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
LufthansaPriceFrom $675Free CancellationRating
6.8
7,337 reviews
Search Lufthansa flights
Air CanadaPriceFrom $705Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
British AirwaysPriceFrom $708Free CancellationRating
6.7
7,289 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
Pienza
Tivoli
Sperlonga
Ciampino
Gaeta
Santa Marinella
Cortona
Orvieto
Montepulciano
Saturnia
Grosseto
Anzio
Sabaudia
Terracina
Ascoli Piceno
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