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Leonardo da Vinci/Fiumicino

$327+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FCO
Jul 20 — Jul 271
Mon 7/20
Mon 7/27
1 adult, Economy
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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 June 20, 2026.

This eDestinos deal was found by Cheapflights users on 6/18. 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.
Wed 8/510:16 am
STL
-
FCO
1 stop18h 49m
Iberia
Thu 8/201:10 pm
FCO
-
STL
1 stop16h 31m
Iberia
Deal found 6/18$725
This lol.travel deal was found by Cheapflights users on 6/17. 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.
Sun 8/912:45 pm
STL
-
FCO
1 stop16h 20m
Finnair
Tue 8/2510:00 am
FCO
-
STL
1 stop21h 14m
Finnair
Deal found 6/17$726
This Gotogate deal was found by Cheapflights users on 6/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/84:15 pm
STL
-
FCO
1 stop33h 40m
Multiple Airlines
Fri 11/137:05 am
FCO
-
STL
1 stop13h 40m
Multiple Airlines
Deal found 6/16$765
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Sun 11/86:30 am
STL
-
FCO
1 stop18h 25m
United Airlines
Fri 11/131:15 pm
FCO
-
STL
2 stops28h 54m
United Airlines
Deal found 6/16$770
This oojo deal was found by Cheapflights users on 6/19. 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.
Sun 11/83:40 pm
STL
-
FCO
1 stop14h 00m
Lufthansa
Wed 11/187:05 am
FCO
-
STL
1 stop13h 40m
Lufthansa
Deal found 6/19$772
This FlightHub deal was found by Cheapflights users on 6/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/86:00 am
STL
-
FCO
2 stops19h 55m
Air Canada
Wed 11/181:15 pm
FCO
-
STL
2 stops40h 54m
Air Canada
Deal found 6/20$773
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Mon 11/99:23 am
STL
-
FCO
2 stops16h 07m
United Airlines
Wed 11/181:15 pm
FCO
-
STL
2 stops30h 25m
United Airlines
Deal found 6/16$775
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Tue 11/105:18 pm
STL
-
FCO
1 stop31h 27m
United Airlines
Tue 1/1211:15 am
FCO
-
STL
1 stop35h 15m
United Airlines
Deal found 6/15$776
This FlightHub deal was found by Cheapflights users on 6/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/94:15 pm
STL
-
FCO
2 stops57h 40m
Air Canada
Wed 11/181:15 pm
FCO
-
STL
2 stops40h 54m
Air Canada
Deal found 6/20$777
This FlightHub deal was found by Cheapflights users on 6/18. 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 11/109:23 am
STL
-
FCO
2 stops40h 32m
Air Canada
Tue 1/1211:15 am
FCO
-
STL
2 stops42h 39m
Air Canada
Deal found 6/18$778

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 June 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$725
(eDestinos)

One-way from

$327
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,686
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. 27% potential increase in price ($370 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($67 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 20, 2026.
Use the filters below to find and compare flights from St. Louis to Rome Fiumicino Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 11/10

4:40 pm-11:55 am

1 stop36h 15m

Rome Fiumicino

Tue 1/12

11:15 am-3:30 pm

1 stop35h 15m

$776

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 10/13

1:30 pm-11:00 am

2 stops14h 30m

Rome Fiumicino

Wed 10/28

10:00 am-11:39 pm

2 stops19h 39m

$883

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 10/27

2:00 pm-7:55 am

1 stop11h 55m

Rome Fiumicino

Mon 11/2

7:05 am-3:30 pm

2 stops15h 25m

$894
Quickest round-trip

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 8/15

12:59 pm-7:55 am

1 stop11h 56m

Rome Fiumicino

Wed 9/30

6:50 am-1:25 pm

1 stop13h 35m

$936

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 7/20

1:13 pm-1:15 pm

2 stops17h 02m

Rome Fiumicino

Mon 7/27

8:00 am-8:22 pm

2 stops19h 22m

$983

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 10/4

3:11 pm-1:15 pm

2 stops15h 04m

Rome Fiumicino

Sun 10/11

10:50 am-9:21 pm

2 stops17h 31m

$989

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Thu 8/27

8:00 am-7:55 am

1 stop16h 55m

Rome Fiumicino

Sat 9/5

11:30 am-12:02 pm

2 stops31h 32m

$992

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Thu 8/27

7:25 am-7:55 am

1 stop17h 30m

Rome Fiumicino

Sun 9/6

6:50 am-1:25 pm

1 stop13h 35m

$1,001

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 9/6

3:44 pm-7:20 pm

3 stops20h 36m

Rome Fiumicino

Sun 9/20

9:30 am-11:36 pm

2 stops21h 06m

$1,317

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Fri 9/4

6:00 am-11:25 am

3 stops46h 25m

Rome Fiumicino

Wed 9/9

1:00 pm-6:38 pm

2 stops36h 38m

$12,004

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/19

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 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 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?

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 49 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, February is the cheapest month in which you can book a flight from St. Louis to Rome Fiumicino Airport (average of $634). Flying from St. Louis to Rome Fiumicino Airport in June is currently the most expensive (average of $1,686). 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 June 20, 2026.
Peruse reviews from past customers who have flown with Delta,United Airlines, andAmerican 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
7.8
Good
8,420 reviews

Boarding

8.1

Food

7.2

Crew

8.5

Comfort

7.8

Overall

7.8

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,420 reviews
Delta
7.8
Good
8,420 reviews

Boarding

8.1

Food

7.2

Crew

8.5

Comfort

7.8

Overall

7.8

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,865 reviews
Delta
7.8
Good
8,420 reviews

Boarding

8.1

Food

7.2

Crew

8.5

Comfort

7.8

Overall

7.8

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,715 reviews
Delta
7.8
Good
8,420 reviews

Boarding

8.1

Food

7.2

Crew

8.5

Comfort

7.8

Overall

7.8

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Lufthansa
6.8
Okay
8,082 reviews
Delta
7.8
Good
8,420 reviews

Boarding

8.1

Food

7.2

Crew

8.5

Comfort

7.8

Overall

7.8

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
British Airways
6.7
Okay
8,056 reviews
Delta
7.8
Good
8,420 reviews

Boarding

8.1

Food

7.2

Crew

8.5

Comfort

7.8

Overall

7.8

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 7 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?

    Iberia, Finnair, and United Airlines can get you from St. Louis to Rome Fiumicino Airport in just under 16h 20m. Your travel time can differ by up to 2h 29m. 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 KLM, starting at $500 and $506 round-trip. British Airways is priced at 50% 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 $362. Lufthansa flights start at $402 while deals on Delta start at $513 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, February is the cheapest month in which you can book a flight from St. Louis to Rome Fiumicino Airport (average of $634). Flying from St. Louis to Rome Fiumicino Airport in June is currently the most expensive (average of $1,686). 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
Civitavecchia
Montepulciano
Santa Marinella

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Leonardo da Vinci/Fiumicino

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Leonardo da Vinci/Fiumicino flights

Top 7 airlines flying from St. Louis to Leonardo da Vinci/Fiumicino

Discover the top 7 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 June 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$472Average$1,200FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$500Average$987FlexibilityNo cancel feeOn-time76%
KLMCheapest$506Average$884FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$549Average$1,031FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$564Average$1,225FlexibilityNo cancel feeOn-time67%
DeltaCheapest$566Average$997FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$665Average$1,070FlexibilityNo cancel feeOn-time71%

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