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Leonardo da Vinci/Fiumicino

$267+ 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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FCO
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
1 adult, Economy
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Find cheap flights from St. Louis to Leonardo da Vinci/Fiumicino with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Lambert-St Louis to Rome Fiumicino are usually found in January or December, booked 40 days in advance, depart on a Tuesday or Monday and return on a Tuesday

Find 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 October 22, 2025.

This Gotogate deal was found by Cheapflights users on 10/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/84:05 pmSTL - FCO
2 stops14h 55mMultiple Airlines
Wed 12/247:05 amFCO - STL
1 stop13h 50mMultiple Airlines
Deal found 10/20$527
This United Airlines deal was found by Cheapflights users on 10/21. 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.
Fri 12/510:00 amSTL - FCO
1 stop14h 45mUnited Airlines
Fri 12/121:10 pmFCO - STL
2 stops32h 15mUnited Airlines
Deal found 10/21$532
This Booking.com deal was found by Cheapflights users on 10/20. 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.
Mon 12/84:05 pmSTL - FCO
2 stops58h 20mAir Canada
Wed 12/241:10 pmFCO - STL
2 stops32h 16mAir Canada
Deal found 10/20$534
This Orbitz deal was found by Cheapflights users on 10/19. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/166:43 pmSTL - FCO
2 stops33h 22mMultiple Airlines
Sun 11/237:05 amFCO - STL
1 stop13h 50mMultiple Airlines
Deal found 10/19$536
This United Airlines deal was found by Cheapflights users on 10/20. 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.
Mon 12/810:00 amSTL - FCO
1 stop14h 45mUnited Airlines
Wed 12/247:05 amFCO - STL
1 stop13h 50mUnited Airlines
Deal found 10/20$537
This United Airlines deal was found by Cheapflights users on 10/21. 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.
Thu 12/46:30 amSTL - FCO
1 stop18h 15mUnited Airlines
Tue 12/91:10 pmFCO - STL
2 stops32h 15mUnited Airlines
Deal found 10/21$539
This United Airlines deal was found by Cheapflights users on 10/20. 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.
Tue 12/26:42 pmSTL - FCO
1 stop30h 03mUnited Airlines
Tue 12/91:10 pmFCO - STL
1 stop33h 19mUnited Airlines
Deal found 10/20$540
This Booking.com deal was found by Cheapflights users on 10/20. 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.
Thu 12/44:05 pmSTL - FCO
2 stops34h 20mAir Canada
Thu 12/1110:55 amFCO - STL
2 stops32h 20mAir Canada
Deal found 10/20$541
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Sun 11/1611:41 amSTL - FCO
1 stop13h 14mUnited Airlines
Sun 11/237:05 amFCO - STL
1 stop13h 50mUnited Airlines
Deal found 10/19$542
This United deal was found by Cheapflights users on 10/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/186:30 amSTL - FCO
2 stops19h 00mMultiple Airlines
Tue 11/251:05 pmFCO - STL
2 stops35h 34mMultiple Airlines
Deal found 10/19$543

Cheap 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 October 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$527
(Gotogate)

One-way from

$267
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$849
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.
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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. 25% potential increase in price ($353 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 22, 2025.
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

Fri 12/5

10:00 am-7:45 am

1 stop14h 45m

Rome Fiumicino

Fri 12/12

1:10 pm-2:25 pm

2 stops32h 15m

$532

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/16

6:43 pm-11:05 am

2 stops33h 22m

Rome Fiumicino

Sun 11/23

7:05 am-1:55 pm

1 stop13h 50m

$536

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Thu 12/4

8:00 am-7:45 am

1 stop16h 45m

Rome Fiumicino

Thu 12/11

10:55 am-3:40 pm

2 stops35h 45m

$539

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 12/2

6:42 pm-7:45 am

1 stop30h 03m

Rome Fiumicino

Tue 12/9

1:10 pm-3:29 pm

1 stop33h 19m

$540

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Thu 12/4

4:05 pm-9:25 am

2 stops34h 20m

Rome Fiumicino

Thu 12/11

10:55 am-12:15 pm

2 stops32h 20m

$541

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/16

6:43 pm-11:05 am

2 stops33h 22m

Rome Fiumicino

Sun 11/23

7:05 am-3:29 pm

2 stops39h 24m

$542

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/16

11:41 am-7:55 am

1 stop13h 14m

Rome Fiumicino

Sun 11/23

7:05 am-1:55 pm

1 stop13h 50m

$542

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 11/18

6:30 am-8:30 am

2 stops19h 00m

Rome Fiumicino

Tue 11/25

1:05 pm-5:39 pm

2 stops35h 34m

$543

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Fri 2/20

8:21 am-7:45 am

1 stop16h 24m

Rome Fiumicino

Sat 2/28

7:05 am-9:00 pm

2 stops20h 55m

$553

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 2/14

4:05 pm-11:05 am

1 stop12h 00m

Rome Fiumicino

Sat 2/21

7:05 am-9:00 pm

2 stops20h 55m

$554

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

Showing 1-10 of 19 results
1
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice 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 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 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 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 October 17, 2025.

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 40 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, August is the cheapest month in which you can book a flight from St. Louis to Rome Fiumicino Airport (average of $555). Flying from St. Louis to Rome Fiumicino Airport in June is currently the most expensive (average of $1,010). 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.

What is the cheapest time of day to fly from STL to FCO?

Find hourly flight availability from St. Louis to Leonardo da Vinci/Fiumicino. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 22, 2025.

It’s optimal to fly from St. Louis to Rome Fiumicino Airport in the evening. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight in the morning.

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 October 22, 2025.
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
7,978 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,978 reviews
Delta
7.9
Good
7,978 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,988 reviews
Delta
7.9
Good
7,978 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,026 reviews
Delta
7.9
Good
7,978 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air Canada
7.1
Good
10,338 reviews
Delta
7.9
Good
7,978 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Lufthansa
6.8
Okay
7,509 reviews
Delta
7.9
Good
7,978 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 Air Canada can get you from St. Louis to Rome Fiumicino Airport in just under 14h 45m. Your travel time can differ by up to 19h 35m. 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 Iberia. Our recent data shows that you can find tickets from as low as $536 on this airline. Additional options worth looking into are United Airlines and Delta, starting at $559 and $587 round-trip. Iberia is priced at 47% lower than the current average price of a flight leaving 3 months from now.

  • 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, August is the cheapest month in which you can book a flight from St. Louis to Rome Fiumicino Airport (average of $555). Flying from St. Louis to Rome Fiumicino Airport in June is currently the most expensive (average of $1,010). 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 October 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$536Average$1,129FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$559Average$1,151FlexibilityNo cancel feeOn-time69%
DeltaCheapest$587Average$873FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$604Average$1,082FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$665Average$939FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$671Average$1,198FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$705Average$1,167FlexibilityNo cancel feeOn-time67%
British AirwaysCheapest$711Average$1,213FlexibilityNo cancel feeOn-time70%

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