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St. Louis

$524+ Cheap flights from Fiumicino (FCO) to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
FCO — STL
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Find cheap flights from Leonardo da Vinci/Fiumicino to St. Louis with Cheapflights

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Cheap flight deals from Leonardo da Vinci/Fiumicino to St. Louis

Cheapest flights from Leonardo da Vinci/Fiumicino to St. Louis
Explore the most affordable flight options available from Leonardo da Vinci/Fiumicino to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 27, 2026.

This American Airlines deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:15 pm
FCO
-
STL
1 stop15h 57m
American Airlines
Sun 9/278:07 pm
STL
-
FCO
2 stops16h 08m
American Airlines
Deal found 1/24$746
This British Airways deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/281:10 pm
FCO
-
STL
1 stop16h 53m
British Airways
Sat 9/124:29 pm
STL
-
FCO
2 stops14h 51m
British Airways
Deal found 1/27$750
This United Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/117:05 am
FCO
-
STL
2 stops22h 53m
United Airlines
Sun 2/158:17 am
STL
-
FCO
2 stops16h 38m
United Airlines
Deal found 1/26$781
This KLM deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/106:10 am
FCO
-
STL
2 stops16h 57m
KLM
Sat 2/145:01 pm
STL
-
FCO
1 stop34h 29m
KLM
Deal found 1/25$868

Find flight deals from Leonardo da Vinci/Fiumicino to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Leonardo da Vinci/Fiumicino (FCO) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$781
(United Airlines)

One-way from

$524
(Finnair)

Popular in

November

Cheapest in

April

Average price

$850
Provider with most accurate pricing for Rome Fiumicino-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Rome Fiumicino-Lambert-St Louis flights.
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From Rome Fiumicino to Lambert-St Louis
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One-way flight from Rome Fiumicino to Lambert-St Louis
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Highest demand for flights based on searches. 20% potential increase in price ($256 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($43 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Leonardo da Vinci/Fiumicino to St. Louis 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, Cheapflights users made 2,558,603 searches. Data last updated January 27, 2026.
Use the filters below to find and compare flights from Rome Fiumicino Airport to St. Louis that are best for you.

Fly from

Leonardo da Vinci/Fiumicino

Fly to

St. Louis

Route

Depart

Return

Price

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 2/11

7:05 am-10:58 pm

2 stops22h 53m

Lambert-St Louis

Sun 2/15

8:30 am-8:30 am

1 stop17h 00m

$781

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 2/10

6:10 am-4:07 pm

2 stops16h 57m

Lambert-St Louis

Sat 2/14

5:01 pm-10:30 am

1 stop34h 29m

$868

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 2/10

6:10 am-8:43 pm

2 stops21h 33m

Lambert-St Louis

Sat 2/14

5:01 pm-10:30 am

1 stop34h 29m

$891

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 2/10

7:05 am-10:58 pm

2 stops22h 53m

Lambert-St Louis

Sat 2/14

1:11 pm-11:00 pm

2 stops26h 49m

$1,143

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 2/10

7:30 am-6:34 pm

2 stops18h 04m

Lambert-St Louis

Sat 2/14

1:30 pm-9:00 am

1 stop12h 30m

$1,147

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 2/10

7:30 am-10:44 pm

2 stops22h 14m

Lambert-St Louis

Sat 2/14

11:46 am-1:55 pm

2 stops19h 09m

$1,164

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 2/10

7:25 am-8:13 pm

2 stops19h 48m

Lambert-St Louis

Sat 2/14

11:46 am-3:30 pm

2 stops20h 44m

$1,165

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 4/15

10:30 am-10:14 pm

2 stops18h 44m

$524

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 4/15

10:30 am-10:14 pm

2 stops18h 44m

$530

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 5/21

10:30 am-11:42 pm

2 stops20h 12m

$533

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 13 results
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Compare providers for flights from Leonardo da Vinci/Fiumicino to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Leonardo da Vinci/Fiumicino to St. Louis in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Rome Fiumicino Airport-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Rome Fiumicino Airport-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Rome Fiumicino Airport-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Rome Fiumicino Airport-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Rome Fiumicino Airport-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Leonardo da Vinci/Fiumicino to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Leonardo da Vinci/Fiumicino with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Rome Fiumicino Airport to St. Louis

What is the cheapest month to book a flight from Rome Fiumicino Airport to St. Louis?

Currently, April is the cheapest month in which you can book a flight from Rome Fiumicino Airport to St. Louis (average of $793). Flying from Rome Fiumicino Airport to St. Louis in November is currently the most expensive (average of $1,471). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Leonardo da Vinci/Fiumicino to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Rome Fiumicino?

    Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Rome Fiumicino. On average, Lambert-St Louis has 0 inbound flights from Rome Fiumicino per day from 0 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from Rome Fiumicino Airport to St. Louis?

    For as low as $868, United Airlines can have you in St. Louis from Rome Fiumicino Airport in 16h 57m. The distance between Rome Fiumicino Airport and St. Louis is about 5050 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Rome Fiumicino Airport to St. Louis one-way?

    One-way options have recently been found by users for as low as $546 on American Airlines. Other airlines that offer cheap prices include British Airways from $596 and Aer Lingus from $603 one-way.

  • Can I find deals for flights from Leonardo da Vinci/Fiumicino to St. Louis that include hotel bookings?

    Yes. In addition to deals on Leonardo da Vinci/Fiumicino to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Leonardo da Vinci/Fiumicino to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Leonardo da Vinci/Fiumicino to St. Louis.

  • Can I find deals for business class flights from Leonardo da Vinci/Fiumicino to St. Louis?

    Yes. Cheapflights offers flight deals from Leonardo da Vinci/Fiumicino to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Rome Fiumicino Airport to St. Louis?

    Currently, April is the cheapest month in which you can book a flight from Rome Fiumicino Airport to St. Louis (average of $793). Flying from Rome Fiumicino Airport to St. Louis in November is currently the most expensive (average of $1,471). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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