What is the cheapest airline that flies from Rome to Lambert-St Louis?

Aer Lingus, British Airways, and Finnair are the most popular carriers operating from Rome to Lambert-St Louis

When did momondo last update prices for flights from Rome to Lambert-St Louis Airport?

Prices for flights from Rome to Lambert-St Louis Airport were last updated today.

How old do you have to be to fly from Rome to Lambert-St Louis Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Rome to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$475 Cheap Flights from Rome to St. Louis in 2025/26

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Find the cheapest flights from Rome to St. Louis

Round-trip

One-way

Cheap round-trip flights

1:30 pm - 10:51 amFCO-STL

28h 21m2 stops

11:49 am - 7:55 amSTL-FCO

13h 06m1 stop

$709United Airlines

Find Deal

Thu, Nov 27 - Mon, Dec 1

1:30 pm - 10:51 amFCO-STL

28h 21m2 stops

3:14 pm - 6:15 pmSTL-FCO

20h 01m2 stops

$714United Airlines

Find Deal

Thu, Nov 27 - Mon, Dec 1

11:30 am - 3:18 pmFCO-STL

34h 48m2 stops

1:30 pm - 9:15 amSTL-FCO

12h 45m1 stop

$721Air Canada

Find Deal

Wed, Oct 1 - Sun, Oct 5

11:30 am - 3:18 pmFCO-STL

34h 48m2 stops

1:30 pm - 9:15 amSTL-FCO

12h 45m1 stop

$722Air Canada

Find Deal

Wed, Oct 1 - Sun, Oct 5

12:25 pm - 7:38 pmFCO-STL

14h 13m1 stop

1:30 pm - 9:15 amSTL-FCO

12h 45m1 stop

$723Air Canada

Find Deal

Wed, Oct 1 - Sun, Oct 5

1:30 pm - 1:55 pmFCO-STL

31h 25m1 stop

11:49 am - 7:55 amSTL-FCO

13h 06m1 stop

$729Lufthansa

Find Deal

Thu, Nov 27 - Mon, Dec 1

11:30 am - 3:18 pmFCO-STL

34h 48m2 stops

12:25 pm - 10:15 amSTL-FCO

14h 50m2 stops

$733Multiple Airlines

Find Deal

Wed, Oct 1 - Sun, Oct 5

6:40 pm - 8:51 pmFCO-STL

32h 11m2 stops

9:12 am - 9:00 amSTL-FCO

16h 48m2 stops

$770Multiple Airlines

Find Deal

Thu, Oct 30 - Thu, Nov 6

9:00 am - 8:34 pmFCO-STL

18h 34m1 stop

5:11 pm - 7:35 amSTL-FCO

31h 24m1 stop

$831KLM

Find Deal

Tue, Sep 30 - Sat, Oct 4

7:05 am - 1:55 pmFCO-STL

13h 50m1 stop

3:30 pm - 1:50 pmSTL-FCO

15h 20m1 stop

$923Lufthansa

Find Deal

Wed, Jan 7 - Wed, Jun 10

Air Canada flights from Rome to St. Louis

Our best Air Canada deals on Rome to St. Louis flight tickets

Air Canada

Oct 1

FCO11:30 amRome Fiumicino

34h 48m

2 stops

STL3:18 pmLambert-St Louis

Oct 5

STL1:30 pmLambert-St Louis

12h 45m

1 stop

FCO9:15 amRome Fiumicino

$721

Find similar

Air Canada

Oct 1

FCO11:30 amRome Fiumicino

34h 48m

2 stops

STL3:18 pmLambert-St Louis

Oct 5

STL1:30 pmLambert-St Louis

12h 45m

1 stop

FCO9:15 amRome Fiumicino

$722

Find similar

Air Canada

Oct 1

FCO12:25 pmRome Fiumicino

14h 13m

1 stop

STL7:38 pmLambert-St Louis

Oct 5

STL1:30 pmLambert-St Louis

12h 45m

1 stop

FCO9:15 amRome Fiumicino

$723

Find similar

United Airlines flights from Rome to St. Louis

Our best United Airlines deals on Rome to St. Louis flight tickets

United Airlines

Nov 27

FCO1:30 pmRome Fiumicino

28h 21m

2 stops

STL10:51 amLambert-St Louis

Dec 1

STL11:49 amLambert-St Louis

13h 06m

1 stop

FCO7:55 amRome Fiumicino

$709

Find similar

United Airlines

Nov 27

FCO1:30 pmRome Fiumicino

28h 21m

2 stops

STL10:51 amLambert-St Louis

Dec 1

STL3:14 pmLambert-St Louis

20h 01m

2 stops

FCO6:15 pmRome Fiumicino

$714

Find similar

United Airlines

Jan 7

FCO9:45 amRome Fiumicino

20h 13m

2 stops

STL10:58 pmLambert-St Louis

Jun 10

STL9:10 amLambert-St Louis

18h 05m

1 stop

FCO10:15 amRome Fiumicino

$812

Find similar

Fly from

Fly to

Route

Depart

Return

Price

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 11/27

1:30 pm-10:51 am

2 stops28h 21m

Lambert-St Louis

Mon 12/1

11:49 am-7:55 am

1 stop13h 06m

$709

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 11/27

1:30 pm-10:51 am

2 stops28h 21m

Lambert-St Louis

Mon 12/1

3:14 pm-6:15 pm

2 stops20h 01m

$714

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 10/1

11:30 am-3:18 pm

2 stops34h 48m

Lambert-St Louis

Sun 10/5

1:30 pm-9:15 am

1 stop12h 45m

$721

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 10/1

11:30 am-3:18 pm

2 stops34h 48m

Lambert-St Louis

Sun 10/5

1:30 pm-9:15 am

1 stop12h 45m

$722

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 10/1

12:25 pm-7:38 pm

1 stop14h 13m

Lambert-St Louis

Sun 10/5

1:30 pm-9:15 am

1 stop12h 45m

$723

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 11/27

1:30 pm-1:55 pm

1 stop31h 25m

Lambert-St Louis

Mon 12/1

11:49 am-7:55 am

1 stop13h 06m

$729

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 10/1

11:30 am-3:18 pm

2 stops34h 48m

Lambert-St Louis

Sun 10/5

12:25 pm-10:15 am

2 stops14h 50m

$733

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 10/30

6:40 pm-8:51 pm

2 stops32h 11m

Lambert-St Louis

Thu 11/6

9:12 am-9:00 am

2 stops16h 48m

$770

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 9/30

9:00 am-8:34 pm

1 stop18h 34m

Lambert-St Louis

Sat 10/4

5:11 pm-7:35 am

1 stop31h 24m

$831

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 1/7

7:05 am-1:55 pm

1 stop13h 50m

Lambert-St Louis

Wed 6/10

3:30 pm-1:50 pm

1 stop15h 20m

$923

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Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Rome to St. Louis

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

Prices

Airlines

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Thursday when prices can be found for as low as $786. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $947. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Rome at noon is the least expensive time of day to depart. momondo users have found prices as low as $929 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $947 per ticket.

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

You could potentially save up to 12% on your flight if you consider stops on a Rome to St. Louis flight.

When to book flights from Rome to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Rome to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Rome to St. Louis (ROM to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Rome to St. Louis

Direct flights	None

There are no direct flights from Rome to St. Louis. There are no popular flight routes from Rome to St. Louis.

Search flight deals

How far is Rome to Lambert-St Louis by plane?
The distance between Rome and Lambert-St Louis is about 5053.3 mi. 13h 50m is a normal flight duration for this route.
When did momondo last update prices for flights from Rome to Lambert-St Louis Airport?
Prices for flights from Rome to Lambert-St Louis Airport were last updated today.
How old do you have to be to fly from Rome to Lambert-St Louis Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Rome to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Rome to St. Louis?
Based on momondo bookings for flights between Rome and St. Louis, the leading airline is British Airways, making up 100% of the total bookings.

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Maryland Heights

O'Fallon

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Alton

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Why use momondo?

Why should I use momondo to find a flight deal from Rome to St. Louis?

Finding the right flight to St. Louis from Rome is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

Can I find flights from Rome to St. Louis with flexible booking policies on momondo?

All flight searches from Rome to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Rome to St. Louis?

momondo helps you find the best flight between Rome and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Rome to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from Rome are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.