HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$385+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
FCO — STL
Mar 16 — Mar 231
Mon 3/16
Mon 3/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Leonardo da Vinci/Fiumicino to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 February 14, 2026.

This United Airlines deal was found by Cheapflights users on 2/12. 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 9/236:50 am
FCO
-
STL
1 stop13h 35m
United Airlines
Sun 9/275:20 am
STL
-
FCO
1 stop24h 00m
United Airlines
Deal found 2/12$854
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Thu 3/59:40 am
FCO
-
STL
2 stops38h 19m
United Airlines
Sun 3/153:23 pm
STL
-
FCO
1 stop34h 22m
United Airlines
Deal found 2/10$860
This United Airlines deal was found by Cheapflights users on 2/12. 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.
Fri 2/271:35 pm
FCO
-
STL
2 stops16h 24m
United Airlines
Tue 3/36:25 am
STL
-
FCO
2 stops18h 30m
United Airlines
Deal found 2/12$861
This United Airlines deal was found by Cheapflights users on 2/11. 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.
Thu 2/267:05 am
FCO
-
STL
2 stops19h 09m
United Airlines
Mon 3/24:49 pm
STL
-
FCO
1 stop31h 56m
United Airlines
Deal found 2/11$862
This American Airlines deal was found by Cheapflights users on 2/10. 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 2/251:10 pm
FCO
-
STL
1 stop16h 54m
American Airlines
Sun 3/16:57 pm
STL
-
FCO
2 stops15h 53m
American Airlines
Deal found 2/10$866
This Air Canada deal was found by Cheapflights users on 2/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:50 am
FCO
-
STL
2 stops20h 10m
Air Canada
Sun 9/278:55 am
STL
-
FCO
2 stops16h 55m
Air Canada
Deal found 2/12$871
This Air France deal was found by Cheapflights users on 2/12. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2712:40 pm
FCO
-
STL
1 stop34h 16m
Multiple Airlines
Tue 3/37:10 am
STL
-
FCO
1 stop20h 20m
Multiple Airlines
Deal found 2/12$878
This KLM deal was found by Cheapflights users on 2/11. 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.
Thu 2/2612:40 pm
FCO
-
STL
1 stop15h 01m
KLM
Mon 3/26:47 pm
STL
-
FCO
1 stop32h 43m
KLM
Deal found 2/11$879

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 February 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$854
(Gotogate)

One-way from

$385
(Kiwi.com)

Popular in

November

Cheapest in

April

Average price

$810
Provider with most accurate pricing for Rome Fiumicino-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Rome Fiumicino-Lambert-St Louis flights.
Search Deals
From Rome Fiumicino to Lambert-St Louis
Search Deals
One-way flight from Rome Fiumicino to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($260 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 14, 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

Thu 3/5

7:05 am-3:29 pm

2 stops39h 24m

Lambert-St Louis

Sun 3/15

4:05 pm-8:40 am

2 stops34h 35m

$854

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 3/5

9:40 am-4:59 pm

2 stops38h 19m

Lambert-St Louis

Sun 3/15

3:23 pm-7:45 am

1 stop34h 22m

$860

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 2/27

1:35 pm-10:59 pm

2 stops16h 24m

Lambert-St Louis

Tue 3/3

6:25 am-7:55 am

2 stops18h 30m

$861

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 2/26

7:05 am-7:14 pm

2 stops19h 09m

Lambert-St Louis

Mon 3/2

4:49 pm-7:45 am

1 stop31h 56m

$862

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 2/25

1:10 pm-11:04 pm

1 stop16h 54m

Lambert-St Louis

Sun 3/1

6:57 pm-5:50 pm

2 stops15h 53m

$866

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 2/27

12:40 pm-3:56 pm

1 stop34h 16m

Lambert-St Louis

Tue 3/3

7:10 am-10:30 am

1 stop20h 20m

$878

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 2/26

12:40 pm-8:41 pm

1 stop15h 01m

Lambert-St Louis

Mon 3/2

6:47 pm-10:30 am

1 stop32h 43m

$879

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sat 3/14

7:00 am-3:29 pm

2 stops38h 29m

Lambert-St Louis

Sat 3/21

4:05 pm-7:55 am

2 stops33h 50m

$889

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 5/5

7:05 pm-10:30 am

2 stops46h 25m

$385

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 3/4

7:20 pm-7:02 am

2 stops42h 42m

$406

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/12

Showing 1-10 of 14 results
1
2

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 February.
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 $860, Air Canada can have you in St. Louis from Rome Fiumicino Airport in 38h 19m. 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Leonardo da Vinci/Fiumicino to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Leonardo da Vinci/Fiumicino to Kansas City flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.