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Leonardo da Vinci/Fiumicino

$284+ 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
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
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 agosto 14, 2025.

Round-trip from

$550
(Cheapflightsfares)

One-way from

$284
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$953
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. 24% potential increase in price ($346 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($47 potential savings vs. average RT price).
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Average for round-trip flights in August 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 agosto 14, 2025.

This United Airlines deal was found by Cheapflights users on 8/11. 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.
mar. 8/193:20 pmSTL - FCO
1 stop33h 35mUnited Airlines
jue. 9/1112:25 pmFCO - STL
1 stop33h 53mUnited Airlines
Deal found 8/11$550
This CheapOair deal was found by Cheapflights users on 8/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/191:30 pmSTL - FCO
1 stop12h 45mAir Canada
jue. 9/117:10 amFCO - STL
2 stops19h 47mAir Canada
Deal found 8/11$555
This United Airlines deal was found by Cheapflights users on 8/11. 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.
jue. 11/64:05 pmSTL - FCO
1 stop12h 00mUnited Airlines
mar. 11/187:05 amFCO - STL
2 stops39h 24mUnited Airlines
Deal found 8/11$558
This Air Canada deal was found by Cheapflights users on 8/12. 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.
mar. 9/169:15 amSTL - FCO
2 stops17h 00mAir Canada
mar. 9/2311:30 amFCO - STL
2 stops34h 48mAir Canada
Deal found 8/12$564
This American Airlines deal was found by Cheapflights users on 8/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/166:00 amSTL - FCO
1 stop19h 20mAmerican Airlines
mar. 9/2310:20 amFCO - STL
1 stop17h 46mAmerican Airlines
Deal found 8/12$566
This United deal was found by Cheapflights users on 8/11. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/285:24 pmSTL - FCO
2 stops56h 31mMultiple Airlines
sáb. 12/66:45 pmFCO - STL
2 stops35h 57mMultiple Airlines
Deal found 8/11$579
This Iberia deal was found by Cheapflights users on 8/11. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/169:46 amSTL - FCO
2 stops18h 24mIberia
mar. 9/2310:20 amFCO - STL
1 stop17h 46mIberia
Deal found 8/11$580
This United Airlines deal was found by Cheapflights users on 8/14. 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.
mié. 11/266:30 amSTL - FCO
2 stops19h 25mUnited Airlines
mié. 12/312:50 pmFCO - STL
2 stops30h 25mUnited Airlines
Deal found 8/14$582
This Gotogate deal was found by Cheapflights users on 8/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/34:05 pmSTL - FCO
2 stops14h 55mMultiple Airlines
jue. 12/1110:55 amFCO - STL
1 stop35h 34mMultiple Airlines
Deal found 8/12$585
This United Airlines deal was found by Cheapflights users on 8/13. 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.
dom. 11/96:43 pmSTL - FCO
1 stop30h 02mUnited Airlines
vie. 11/211:15 pmFCO - STL
2 stops37h 24mUnited Airlines
Deal found 8/13$587

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 agosto 14, 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

mié. 12/3

11:57 am-10:35 am

1 stop15h 38m

Rome Fiumicino

jue. 12/11

1:00 pm-10:22 pm

1 stop16h 22m

$550

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

mar. 9/16

9:15 am-9:15 am

2 stops17h 00m

Rome Fiumicino

mar. 9/23

11:30 am-7:57 pm

1 stop15h 27m

$558

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

jue. 11/6

4:05 pm-8:55 am

2 stops33h 50m

Rome Fiumicino

mar. 11/18

7:05 am-3:29 pm

2 stops39h 24m

$558

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

jue. 11/6

4:05 pm-11:05 am

1 stop12h 00m

Rome Fiumicino

mar. 11/18

7:05 am-3:29 pm

2 stops39h 24m

$558

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

mar. 9/16

1:03 pm-11:20 am

1 stop15h 17m

Rome Fiumicino

mar. 9/23

10:20 am-9:06 pm

1 stop17h 46m

$561

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

mar. 9/16

6:00 am-8:20 am

1 stop19h 20m

Rome Fiumicino

mar. 9/23

10:20 am-9:06 pm

1 stop17h 46m

$566

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

mar. 9/16

1:03 pm-11:20 am

1 stop15h 17m

Rome Fiumicino

mar. 9/23

10:20 am-9:06 pm

1 stop17h 46m

$566

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

vie. 11/28

4:05 pm-8:55 am

2 stops57h 50m

Rome Fiumicino

sáb. 12/6

6:45 pm-1:55 pm

1 stop26h 10m

$571

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

sáb. 10/4

7:55 pm-12:55 am

3 stops46h 00m

$284

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

dom. 9/28

4:00 pm-12:10 am

3 stops49h 10m

$310

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 17 results
1
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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 August 8, 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 $1,135). 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 agosto 14, 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 agosto 14, 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
7,980 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

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
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

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
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

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
7,980 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

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
9,949 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

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
7,317 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

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.

  • 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 Delta and United Airlines, starting at $587 and $605 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 $1,135). 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
Ciampino
Montepulciano
Santa Marinella

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.

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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$536Average$1,129FlexibilityNo cancel feeOn-time77%
DeltaCheapest$587Average$939FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$605Average$1,146FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$665Average$970FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$675Average$1,074FlexibilityNo cancel feeOn-time76%
KLMCheapest$679Average$1,125FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$705Average$1,156FlexibilityNo cancel feeOn-time67%
British AirwaysCheapest$708Average$1,213FlexibilityNo cancel feeOn-time70%

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