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Leonardo da Vinci/Fiumicino

$278+ 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FCO
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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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

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 September 17, 2025.

Round-trip from

$532
(lol.travel)

One-way from

$278
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$950
From Lambert-St Louis to Rome Fiumicino
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One-way flight from Lambert-St Louis to Rome Fiumicino
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Highest demand for flights based on searches. 25% potential increase in price ($348 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($46 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 17, 2025.

This lol.travel deal was found by Cheapflights users on 9/15. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/203:23 pmSTL - FCO
2 stops14h 42mUnited Airlines
Wed 11/57:05 amFCO - STL
1 stop13h 50mUnited Airlines
Deal found 9/15$532
This United Airlines deal was found by Cheapflights users on 9/15. 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 11/96:30 amSTL - FCO
2 stops19h 00mUnited Airlines
Fri 11/211:15 pmFCO - STL
2 stops32h 10mUnited Airlines
Deal found 9/15$557
This United Airlines deal was found by Cheapflights users on 9/15. 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 11/106:43 pmSTL - FCO
1 stop30h 02mUnited Airlines
Fri 11/211:15 pmFCO - STL
2 stops32h 10mUnited Airlines
Deal found 9/15$558
This United Airlines deal was found by Cheapflights users on 9/16. 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 12/211:25 amSTL - FCO
1 stop13h 20mUnited Airlines
Thu 12/1110:55 amFCO - STL
2 stops35h 45mUnited Airlines
Deal found 9/16$559
This eDestinos deal was found by Cheapflights users on 9/16. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/210:49 amSTL - FCO
1 stop15h 11mIberia
Thu 12/1111:35 amFCO - STL
1 stop15h 46mIberia
Deal found 9/16$564
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/203:59 pmSTL - FCO
1 stop12h 06mDelta
Wed 11/59:20 amFCO - STL
1 stop29h 53mDelta
Deal found 9/15$568
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/910:44 amSTL - FCO
1 stop15h 16mIberia
Fri 11/211:10 pmFCO - STL
1 stop16h 54mIberia
Deal found 9/15$569
This United deal was found by Cheapflights users on 9/15. 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.
Mon 10/203:23 pmSTL - FCO
1 stop33h 32mMultiple Airlines
Wed 11/57:05 amFCO - STL
2 stops17h 34mMultiple Airlines
Deal found 9/15$571

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 September 17, 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

Mon 11/10

6:43 pm-7:45 am

1 stop30h 02m

Rome Fiumicino

Fri 11/21

1:15 pm-2:25 pm

2 stops32h 10m

$558

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 12/2

6:30 am-11:05 am

2 stops21h 35m

Rome Fiumicino

Thu 12/11

10:55 am-3:40 pm

2 stops35h 45m

$566

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 10/20

3:59 pm-11:05 am

1 stop12h 06m

Rome Fiumicino

Wed 11/5

9:20 am-8:13 am

1 stop29h 53m

$568

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 10/20

3:23 pm-7:55 am

1 stop33h 32m

Rome Fiumicino

Wed 11/5

7:05 am-5:39 pm

2 stops17h 34m

$571

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/9

9:21 am-10:30 am

1 stop18h 09m

Rome Fiumicino

Fri 11/21

9:20 am-4:33 pm

1 stop14h 13m

$575

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 11/10

5:24 pm-7:45 am

1 stop31h 21m

Rome Fiumicino

Tue 11/18

6:45 pm-1:55 pm

1 stop26h 10m

$599

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

12:45 pm-7:48 pm

2 stops38h 03m

$602

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Thu 12/4

6:30 am-7:55 am

2 stops18h 25m

Rome Fiumicino

Fri 12/12

12:45 pm-9:40 pm

2 stops39h 55m

$607

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Fri 12/5

10:00 am-8:30 am

2 stops15h 30m

Rome Fiumicino

Fri 12/12

12:45 pm-9:40 pm

2 stops39h 55m

$607

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Thu 12/4

8:00 am-7:45 am

1 stop16h 45m

Rome Fiumicino

Fri 12/12

7:05 am-1:55 pm

1 stop13h 50m

$619

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 21 results
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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 September 12, 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, January is the cheapest month in which you can book a flight from St. Louis to Rome Fiumicino Airport (average of $644). Flying from St. Louis to Rome Fiumicino Airport in June is currently the most expensive (average of $1,130). 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 September 17, 2025.

It’s optimal to fly from St. Louis to Rome Fiumicino Airport in the afternoon. By choosing this option you can save up to 7% 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 September 17, 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
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
10,000 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Lufthansa
6.8
Okay
7,409 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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, Delta, and KLM can get you from St. Louis to Rome Fiumicino Airport in just under 12h 06m. Your travel time can differ by up to 17h 56m. 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 48% 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, January is the cheapest month in which you can book a flight from St. Louis to Rome Fiumicino Airport (average of $644). Flying from St. Louis to Rome Fiumicino Airport in June is currently the most expensive (average of $1,130). 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
Gaeta
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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$536Average$1,129FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$559Average$1,137FlexibilityNo cancel feeOn-time69%
DeltaCheapest$587Average$929FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$604Average$1,048FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$665Average$938FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$671Average$1,115FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$705Average$1,167FlexibilityNo cancel feeOn-time67%
British AirwaysCheapest$711Average$1,213FlexibilityNo cancel feeOn-time70%

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