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Leonardo da Vinci/Fiumicino

$310+ 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FCO
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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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 January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$438
(United Airlines)

One-way from

$310
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$665
Provider with most accurate pricing for Lambert-St Louis-Rome Fiumicino flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Rome Fiumicino flights.
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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 ($336 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($43 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 8, 2026.

This United Airlines deal was found by Cheapflights users on 1/8. 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 2/257:41 amSTL - FCO
1 stop17h 04mUnited Airlines
Wed 3/41:15 pmFCO - STL
2 stops38h 52mUnited Airlines
Deal found 1/8$438
This United Airlines deal was found by Cheapflights users on 1/7. 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 1/2712:44 pmSTL - FCO
1 stop12h 46mUnited Airlines
Tue 2/31:10 pmFCO - STL
2 stops32h 20mUnited Airlines
Deal found 1/7$443
This oojo deal was found by Cheapflights users on 1/7. 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 2/21:35 pmSTL - FCO
2 stops23h 00mBritish Airways
Fri 2/131:10 pmFCO - STL
1 stop16h 42mBritish Airways
Deal found 1/7$445
This oojo deal was found by Cheapflights users on 1/6. 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.
Sun 2/89:33 amSTL - FCO
2 stops19h 52mBritish Airways
Wed 2/181:10 pmFCO - STL
1 stop16h 54mBritish Airways
Deal found 1/6$446
This British Airways deal was found by Cheapflights users on 1/7. 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.
Wed 4/151:29 pmSTL - FCO
2 stops20h 26mBritish Airways
Tue 4/2110:00 amFCO - STL
1 stop20h 48mBritish Airways
Deal found 1/7$455
This KLM deal was found by Cheapflights users on 1/7. 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.
Wed 1/219:59 amSTL - FCO
1 stop17h 31mKLM
Wed 1/2812:40 pmFCO - STL
1 stop14h 57mKLM
Deal found 1/7$458
This Air Canada deal was found by Cheapflights users on 1/6. 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.
Tue 1/138:05 amSTL - FCO
2 stops18h 20mAir Canada
Thu 1/2212:50 pmFCO - STL
1 stop33h 39mAir Canada
Deal found 1/6$459
This FlightHub deal was found by Cheapflights users on 1/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/144:05 pmSTL - FCO
2 stops34h 10mAir Canada
Thu 4/2312:25 pmFCO - STL
1 stop33h 59mAir Canada
Deal found 1/7$463
This British Airways deal was found by Cheapflights users on 1/7. 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.
Wed 4/151:29 pmSTL - FCO
2 stops20h 26mBritish Airways
Mon 4/208:20 pmFCO - STL
1 stop30h 10mBritish Airways
Deal found 1/7$465
This Finnair deal was found by Cheapflights users on 1/8. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1711:46 amSTL - FCO
2 stops24h 09mFinnair
Tue 3/246:40 pmFCO - STL
2 stops30h 49mFinnair
Deal found 1/8$466

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 8, 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

Tue 1/27

12:44 pm-8:30 am

1 stop12h 46m

Rome Fiumicino

Tue 2/3

1:10 pm-2:30 pm

2 stops32h 20m

$443

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 1/21

7:10 am-10:30 am

1 stop20h 20m

Rome Fiumicino

Wed 1/28

12:40 pm-11:37 pm

1 stop17h 57m

$458

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 4/14

5:53 pm-9:50 am

1 stop32h 57m

Rome Fiumicino

Thu 4/23

1:10 pm-11:04 pm

1 stop16h 54m

$458

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 2/3

9:59 am-9:45 am

2 stops16h 46m

Rome Fiumicino

Tue 2/10

12:40 pm-8:37 pm

1 stop14h 57m

$462

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 2/21

8:30 am-8:30 am

1 stop17h 00m

Rome Fiumicino

Sat 2/28

9:45 am-9:05 pm

1 stop18h 20m

$508

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 2/8

8:30 am-8:30 am

1 stop17h 00m

Rome Fiumicino

Wed 2/18

11:00 am-8:23 pm

1 stop16h 23m

$508

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 3/22

6:33 pm-9:55 pm

2 stops21h 22m

Rome Fiumicino

Mon 3/30

2:15 pm-5:01 pm

1 stop33h 46m

$511

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 1/21

6:44 pm-7:20 pm

2 stops17h 36m

Rome Fiumicino

Sun 1/25

5:50 pm-9:15 pm

2 stops34h 25m

$525

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Fri 3/6

8:12 pm-10:15 am

3 stops55h 03m

$350

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 4/20

2:29 pm-7:50 pm

2 stops22h 21m

$364

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 18 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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Rome Fiumicino Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 2, 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 $465). Flying from St. Louis to Rome Fiumicino Airport in June is currently the most expensive (average of $1,008). 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.

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 8, 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
8,032 reviews

Boarding

8.1

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Overall

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
8,032 reviews
Delta
7.9
Good
8,032 reviews

Boarding

8.1

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Overall

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
9,142 reviews
Delta
7.9
Good
8,032 reviews

Boarding

8.1

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Overall

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
11,097 reviews
Delta
7.9
Good
8,032 reviews

Boarding

8.1

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Overall

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
10,603 reviews
Delta
7.9
Good
8,032 reviews

Boarding

8.1

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Overall

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
7,698 reviews
Delta
7.9
Good
8,032 reviews

Boarding

8.1

Entertainment

7.8

Food

7.2

Comfort

7.9

Crew

8.5

Overall

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, KLM, and British Airways can get you from St. Louis to Rome Fiumicino Airport in just under 12h 46m. Your travel time can differ by up to 20h 11m. 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 $472 on this airline. Additional options worth looking into are Lufthansa and Iberia, starting at $506 and $536 round-trip. British Airways is priced at 51% 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 $465). Flying from St. Louis to Rome Fiumicino Airport in June is currently the most expensive (average of $1,008). 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

Browse thousands of different options on Cheapflights for your next trip

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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 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$472Average$787FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$506Average$987FlexibilityNo cancel feeOn-time76%
IberiaCheapest$536Average$1,129FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$549Average$1,069FlexibilityNo cancel feeOn-time69%
KLMCheapest$555Average$983FlexibilityNo cancel feeOn-time75%
DeltaCheapest$587Average$873FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$665Average$938FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$705Average$1,170FlexibilityNo cancel feeOn-time67%

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