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Cheap flights from St. Louis to Rome from $394

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 1/18. 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

Enter your travel dates to find the best prices.
Lufthansa Logo
6:40 pm - 6:15 pmSTL-FCO
16h 35m2 stops
Lufthansa Logo
7:05 am - 1:55 pmFCO-STL
13h 50m1 stop
$442Lufthansa
Find Deal
Tue, Jan 13 - Wed, Jan 21
Lufthansa Logo
3:50 pm - 8:00 pmSTL-FCO
21h 10m1 stop
Lufthansa Logo
7:05 am - 11:59 pmFCO-STL
23h 54m2 stops
$454Lufthansa
Find Deal
Fri, Jan 9 - Fri, Jan 16
KLM Logo
9:59 am - 10:30 amSTL-FCO
17h 31m1 stop
KLM Logo
12:40 pm - 8:37 pmFCO-STL
14h 57m1 stop
$456KLM
Find Deal
Wed, Jan 21 - Wed, Jan 28
American Airlines Logo
2:54 pm - 12:25 pmSTL-FCO
14h 31m2 stops
American Airlines Logo
8:20 pm - 8:51 amFCO-STL
19h 31m2 stops
$460American Airlines
Find Deal
Wed, Jan 21 - Wed, Jan 28
KLM Logo
9:59 am - 9:45 amSTL-FCO
16h 46m2 stops
KLM Logo
12:40 pm - 11:37 pmFCO-STL
17h 57m1 stop
$461KLM
Find Deal
Wed, Jan 21 - Wed, Jan 28
British Airways Logo
6:46 pm - 4:55 pmSTL-FCO
15h 09m2 stops
British Airways Logo
5:50 pm - 6:14 pmFCO-STL
31h 24m2 stops
$463British Airways
Find Deal
Tue, Jan 13 - Thu, Jan 22
Multiple Airlines Logo
9:36 am - 10:45 amSTL-FCO
18h 09m1 stop
Multiple Airlines Logo
8:20 pm - 7:29 pmFCO-STL
30h 09m2 stops
$464Multiple Airlines
Find Deal
Tue, Dec 30 - Wed, Jan 14
Multiple Airlines Logo
7:05 am - 9:00 amSTL-FCO
18h 55m2 stops
Multiple Airlines Logo
8:20 pm - 7:29 pmFCO-STL
30h 09m2 stops
$469Multiple Airlines
Find Deal
Tue, Dec 30 - Wed, Jan 14
Lufthansa Logo
3:50 pm - 8:00 pmSTL-FCO
21h 10m1 stop
Lufthansa Logo
10:30 am - 11:59 pmFCO-STL
20h 29m1 stop
$473Lufthansa
Find Deal
Fri, Jan 9 - Fri, Jan 16
American Airlines Logo
12:06 pm - 1:30 pmSTL-FCO
18h 24m2 stops
American Airlines Logo
1:10 pm - 11:02 pmFCO-STL
16h 52m1 stop
$477American Airlines
Find Deal
Sat, Jan 31 - Fri, Feb 13

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
$456
Find similar
KLM
Jan 21
STL9:59 amLambert-St Louis
16h 46m
2 stops
FCO9:45 amRome Fiumicino
Jan 28
FCO12:40 pmRome Fiumicino
17h 57m
1 stop
STL11:37 pmLambert-St Louis
$461
Find similar
KLM
Dec 30
STL7:00 amLambert-St Louis
17h 55m
1 stop
FCO7:55 amRome Fiumicino
Jan 14
FCO12:45 pmRome Fiumicino
17h 54m
2 stops
STL11:39 pmLambert-St Louis
$506
Find similar

American Airlines flights from St. Louis to Rome

Our best American Airlines deals on St. Louis to Rome flight tickets
American Airlines
Jan 21
STL2:54 pmLambert-St Louis
14h 31m
2 stops
FCO12:25 pmRome Fiumicino
Jan 28
FCO8:20 pmRome Fiumicino
19h 31m
2 stops
STL8:51 amLambert-St Louis
$460
Find similar
American Airlines
Jan 31
STL12:06 pmLambert-St Louis
18h 24m
2 stops
FCO1:30 pmRome Fiumicino
Feb 13
FCO1:10 pmRome Fiumicino
16h 52m
1 stop
STL11:02 pmLambert-St Louis
$477
Find similar
American Airlines
Dec 4
STL6:00 amLambert-St Louis
20h 00m
1 stop
FCO9:00 amRome Fiumicino
Dec 9
FCO7:30 amRome Fiumicino
19h 54m
2 stops
STL8:24 pmLambert-St Louis
$514
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 November 26, 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 1/13

6:40 pm-6:15 pm

2 stops16h 35m

Rome Fiumicino

Wed 1/21

7:05 am-1:55 pm

1 stop13h 50m

$442

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Fri 1/9

3:50 pm-8:00 pm

1 stop21h 10m

Rome Fiumicino

Fri 1/16

7:05 am-11:59 pm

2 stops23h 54m

$454

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

$456

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 1/21

2:54 pm-12:25 pm

2 stops14h 31m

Rome Fiumicino

Wed 1/28

8:20 pm-8:51 am

2 stops19h 31m

$460

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 1/21

9:59 am-9:45 am

2 stops16h 46m

Rome Fiumicino

Wed 1/28

12:40 pm-11:37 pm

1 stop17h 57m

$461

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 1/13

6:46 pm-4:55 pm

2 stops15h 09m

Rome Fiumicino

Thu 1/22

5:50 pm-6:14 pm

2 stops31h 24m

$463

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 12/30

9:36 am-10:45 am

1 stop18h 09m

Rome Fiumicino

Wed 1/14

8:20 pm-7:29 pm

2 stops30h 09m

$464

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 12/30

7:05 am-9:00 am

2 stops18h 55m

Rome Fiumicino

Wed 1/14

8:20 pm-7:29 pm

2 stops30h 09m

$469

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Fri 1/9

3:50 pm-8:00 pm

1 stop21h 10m

Rome Fiumicino

Fri 1/16

10:30 am-11:59 pm

1 stop20h 29m

$473

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 1/31

12:06 pm-1:30 pm

2 stops18h 24m

Rome Fiumicino

Fri 2/13

1:10 pm-11:02 pm

1 stop16h 52m

$477

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 $709, 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 $710.

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 $1,008 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 $835 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

Fastest flight time

12h 35m

Direct flights

None
The fastest flight from St. Louis to Rome takes 12h 35m
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
IberiaPriceFrom $536Free CancellationRating
7.0
3,034 reviews
Search Iberia flights
United AirlinesPriceFrom $549Free CancellationRating
7.4
9,046 reviews
Search United Airlines flights
KLMPriceFrom $555Free CancellationRating
7.7
1,422 reviews
Search KLM flights
DeltaPriceFrom $587Free CancellationRating
7.9
7,998 reviews
Search Delta flights
LufthansaPriceFrom $621Free CancellationRating
6.8
7,594 reviews
Search Lufthansa flights
American AirlinesPriceFrom $665Free CancellationRating
7.2
11,038 reviews
Search American Airlines flights
Air CanadaPriceFrom $705Free CancellationRating
7.1
10,476 reviews
Search Air Canada flights
British AirwaysPriceFrom $711Free CancellationRating
6.7
7,539 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
Pienza
Ponza
Montepulciano
Gaeta
Tivoli
Sperlonga
Orvieto
Ciampino
Cortona
Terracina
Ascoli Piceno
Santa Marinella
Grosseto
Chianciano Terme
Sabaudia
Saturnia
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