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Leonardo da Vinci/Fiumicino

$296+ Cheap flights from St. Louis (STL) to Fiumicino (FCO)

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 3/22. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FCO
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Find cheap flights from St. Louis to Leonardo da Vinci/Fiumicino with Cheapflights

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

Cheapest flights from St. Louis to Leonardo da Vinci/Fiumicino
Explore the most affordable flight options available from St. Louis to Leonardo da Vinci/Fiumicino. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This United Airlines deal was found by Cheapflights users on 1/20. 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 2/184:05 pm
STL
-
FCO
1 stop12h 00m
United Airlines
Wed 2/2511:15 am
FCO
-
STL
2 stops40h 50m
United Airlines
Deal found 1/20$441
This United Airlines deal was found by Cheapflights users on 1/21. 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.
Tue 3/34:05 pm
STL
-
FCO
1 stop11h 50m
United Airlines
Tue 3/1012:10 pm
FCO
-
STL
2 stops32h 32m
United Airlines
Deal found 1/21$446
This United Airlines deal was found by Cheapflights users on 1/19. 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.
Tue 2/38:05 am
STL
-
FCO
2 stops15h 40m
United Airlines
Thu 2/1212:50 pm
FCO
-
STL
2 stops39h 50m
United Airlines
Deal found 1/19$447
This American Airlines deal was found by Cheapflights users on 1/21. 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.
Sun 2/226:38 pm
STL
-
FCO
2 stops15h 17m
American Airlines
Tue 3/101:10 pm
FCO
-
STL
2 stops16h 38m
American Airlines
Deal found 1/21$448
This Booking.com deal was found by Cheapflights users on 1/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/34:05 pm
STL
-
FCO
2 stops33h 50m
Air Canada
Tue 3/1012:10 pm
FCO
-
STL
2 stops32h 32m
Air Canada
Deal found 1/20$449
This Flightnetwork deal was found by Cheapflights users on 1/21. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/224:05 pm
STL
-
FCO
2 stops14h 55m
Air Canada
Tue 3/1012:10 pm
FCO
-
STL
1 stop33h 19m
Air Canada
Deal found 1/21$451
This United Airlines deal was found by Cheapflights users on 1/21. 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.
Sun 2/2211:25 am
STL
-
FCO
1 stop13h 20m
United Airlines
Tue 3/109:45 am
FCO
-
STL
1 stop17h 22m
United Airlines
Deal found 1/21$452
This American Airlines deal was found by Cheapflights users on 1/21. 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.
Tue 2/33:20 pm
STL
-
FCO
2 stops18h 35m
American Airlines
Fri 2/131:10 pm
FCO
-
STL
1 stop16h 42m
American Airlines
Deal found 1/21$454
This British Airways deal was found by Cheapflights users on 1/20. 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.
Mon 3/236:33 pm
STL
-
FCO
2 stops19h 02m
British Airways
Tue 3/3110:00 am
FCO
-
STL
1 stop29h 51m
British Airways
Deal found 1/20$455
This oojo deal was found by Cheapflights users on 1/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/176:31 pm
STL
-
FCO
2 stops20h 24m
British Airways
Tue 2/247:25 am
FCO
-
STL
2 stops23h 23m
British Airways
Deal found 1/20$457
This oojo deal was found by Cheapflights users on 1/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/29:33 am
STL
-
FCO
2 stops27h 02m
British Airways
Thu 2/128:10 pm
FCO
-
STL
2 stops34h 25m
British Airways
Deal found 1/19$458

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

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Leonardo da Vinci/Fiumicino (FCO). 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 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$441
(Mytrip)

One-way from

$296
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$643
Provider with most accurate pricing for Lambert-St Louis-Rome Fiumicino flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Rome Fiumicino flights.
Search Deals
From Lambert-St Louis to Rome Fiumicino
Search Deals
One-way flight from Lambert-St Louis to Rome Fiumicino
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($351 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Leonardo da Vinci/Fiumicino 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 21, 2026.
Use the filters below to find and compare flights from St. Louis to Rome Fiumicino Airport that are best for you.

Fly from

St. Louis

Fly to

Leonardo da Vinci/Fiumicino

Route

Depart

Return

Price

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 2/18

11:25 am-11:05 am

2 stops16h 40m

Rome Fiumicino

Wed 2/25

11:15 am-9:05 pm

2 stops40h 50m

$445

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 2/16

2:00 pm-9:00 am

1 stop12h 00m

Rome Fiumicino

Tue 2/24

12:20 pm-11:48 pm

2 stops18h 28m

$477

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 2/4

11:20 am-11:00 pm

2 stops28h 40m

Rome Fiumicino

Tue 2/24

9:45 am-9:05 pm

1 stop18h 20m

$481

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 2/4

11:20 am-11:00 pm

2 stops28h 40m

Rome Fiumicino

Fri 2/13

11:00 am-10:36 am

2 stops30h 36m

$485

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/15

6:55 pm-6:15 pm

2 stops16h 20m

Rome Fiumicino

Tue 2/24

9:45 am-9:05 pm

1 stop18h 20m

$490

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 2/14

4:28 pm-8:30 am

2 stops33h 02m

Rome Fiumicino

Tue 2/24

9:45 am-9:05 pm

1 stop18h 20m

$492

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 3/17

11:46 am-5:55 pm

2 stops24h 09m

Rome Fiumicino

Tue 3/24

6:40 pm-7:29 pm

2 stops30h 49m

$535

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/15

7:10 am-10:30 am

1 stop20h 20m

Rome Fiumicino

Mon 2/23

12:40 pm-9:06 am

1 stop27h 26m

$604

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 4/7

11:15 am-7:55 am

1 stop13h 40m

Rome Fiumicino

Tue 4/14

1:20 pm-1:25 pm

1 stop31h 05m

$611

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 2/14

5:01 pm-10:30 am

1 stop34h 29m

Rome Fiumicino

Tue 2/24

12:40 pm-11:36 pm

1 stop17h 56m

$635

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 21 results
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Compare providers for flights from St. Louis to Leonardo da Vinci/Fiumicino

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 St. Louis to Leonardo da Vinci/Fiumicino in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 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 St. Louis-Rome Fiumicino Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Rome Fiumicino Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Rome Fiumicino Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Rome Fiumicino Airport flights, Cheapflights users trust Expedia the most. Expedia 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 St. Louis-Rome Fiumicino Airport 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 St. Louis to Leonardo da Vinci/Fiumicino

Have a flexible travel schedule? Discover the best time to fly to Leonardo da Vinci/Fiumicino from St. Louis 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 St. Louis to Rome Fiumicino Airport

How far ahead should I book a flight from St. Louis to Rome Fiumicino Airport?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Leonardo da Vinci/Fiumicino. Price data was last updated on January 16, 2026.

To ensure you get the cheapest price possible for a flight from St. Louis to Rome Fiumicino Airport, you should look to book at least 50 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from St. Louis to Rome Fiumicino Airport (average of $455). Flying from St. Louis to Rome Fiumicino Airport in June is currently the most expensive (average of $1,009). 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.

How much does it cost to fly round-trip from St. Louis to Rome Fiumicino Airport?

Reviews of airlines servicing Leonardo da Vinci/Fiumicino

Get insights into the airlines that provide service to Leonardo da Vinci/Fiumicino. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Leonardo da Vinci/Fiumicino. Reviews last updated January 21, 2026.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from St. Louis to Rome Fiumicino Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,088 reviews

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,088 reviews
Delta
7.9
Good
8,088 reviews

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,191 reviews
Delta
7.9
Good
8,088 reviews

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,174 reviews
Delta
7.9
Good
8,088 reviews

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,646 reviews
Delta
7.9
Good
8,088 reviews

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Lufthansa
6.8
Okay
7,738 reviews
Delta
7.9
Good
8,088 reviews

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Leonardo da Vinci/Fiumicino. 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 from for flights from St. Louis to Rome Fiumicino?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Rome Fiumicino. You should not have trouble finding flights to Rome Fiumicino from Lambert-St Louis; the airport handles an average of 0 outbound flights to Rome Fiumicino per day. You should also have plenty of airline options to choose from since 8 airlines have flights from the St. Louis airport to Rome Fiumicino. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

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

    United Airlines and British Airways can get you from St. Louis to Rome Fiumicino Airport in just under 12h. Your travel time can differ by up to 4h 40m. Airlines will cover a distance of 5050 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from St. Louis to Rome Fiumicino Airport round-trip?

    Our cheapest airline available from St. Louis to Rome Fiumicino Airport is British Airways. Our recent data shows that you can find tickets from as low as $481 on this airline. Additional options worth looking into are Lufthansa and KLM, starting at $506 and $506 round-trip. British Airways is priced at 49% lower than the current average price of a flight leaving 3 months from now.

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

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $428. Lufthansa flights start at $532 while deals on Delta start at $548 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Leonardo da Vinci/Fiumicino 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 St. Louis to Rome Fiumicino Airport?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Rome Fiumicino Airport (average of $455). Flying from St. Louis to Rome Fiumicino Airport in June is currently the most expensive (average of $1,009). 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 Rome Fiumicino Airport?

Book flights to Rome Fiumicino Airport if you plan to visit one of these locations
Fiumicino
Montepulciano
Santa Marinella

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Top 8 airlines flying from St. Louis to Leonardo da Vinci/Fiumicino

Discover the top 8 airlines that operate flights from St. Louis to Leonardo da Vinci/Fiumicino. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$481Average$787FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$506Average$987FlexibilityNo cancel feeOn-time76%
KLMCheapest$506Average$983FlexibilityNo cancel feeOn-time75%
IberiaCheapest$536Average$1,129FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$549Average$1,031FlexibilityNo cancel feeOn-time69%
DeltaCheapest$566Average$838FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$665Average$937FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$705Average$1,170FlexibilityNo cancel feeOn-time67%

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