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Leonardo da Vinci/Fiumicino

$297+ 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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FCO
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
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 86 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 June 30, 2025.

Round-trip from

$565
(Air Canada)

One-way from

$297
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$1,540
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. 23% potential increase in price ($332 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($44 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 30, 2025.

This Air Canada deal was found by Cheapflights users on 6/30. 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.
Wed 9/109:15 amSTL - FCO
2 stops17h 00mAir Canada
Wed 9/2412:25 pmFCO - STL
2 stops38h 32mAir Canada
Deal found 6/30$565
This KLM deal was found by Cheapflights users on 6/30. 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 9/1010:45 amSTL - FCO
1 stop15h 35mKLM
Wed 9/249:00 amFCO - STL
1 stop18h 35mKLM
Deal found 6/30$566
This United Airlines deal was found by Cheapflights users on 6/30. 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 9/108:10 amSTL - FCO
2 stops18h 05mUnited Airlines
Wed 9/247:10 amFCO - STL
2 stops15h 34mUnited Airlines
Deal found 6/30$570
This Mytrip deal was found by Cheapflights users on 6/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/109:15 amSTL - FCO
3 stops30h 05mMultiple Airlines
Wed 9/2410:55 pmFCO - STL
2 stops28h 02mMultiple Airlines
Deal found 6/30$596
This Delta deal was found by Cheapflights users on 6/30. 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.
Wed 9/107:00 amSTL - FCO
2 stops19h 20mDelta
Sat 9/2010:10 amFCO - STL
2 stops18h 50mDelta
Deal found 6/30$631
This Iberia deal was found by Cheapflights users on 6/29. 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.
Sat 8/164:19 pmSTL - FCO
1 stop33h 51mIberia
Sun 9/142:45 pmFCO - STL
2 stops49h 27mIberia
Deal found 6/29$651
This Expedia deal was found by Cheapflights users on 6/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/135:25 pmSTL - FCO
1 stop32h 45mBritish Airways
Sat 9/277:20 amFCO - STL
2 stops19h 55mBritish Airways
Deal found 6/30$655
This Expedia deal was found by Cheapflights users on 6/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/135:30 pmSTL - FCO
2 stops33h 30mLufthansa
Sat 9/206:55 pmFCO - STL
2 stops25h 35mLufthansa
Deal found 6/29$685

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 30, 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

Wed 9/10

9:15 am-9:15 am

2 stops17h 00m

Rome Fiumicino

Wed 9/24

12:25 pm-7:57 pm

2 stops38h 32m

$565

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 9/10

10:45 am-9:20 am

1 stop15h 35m

Rome Fiumicino

Wed 9/24

9:00 am-8:35 pm

1 stop18h 35m

$566

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 9/10

8:10 am-9:15 am

2 stops18h 05m

Rome Fiumicino

Wed 9/24

7:10 am-3:44 pm

2 stops15h 34m

$570

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 9/10

9:15 am-10:20 pm

3 stops30h 05m

Rome Fiumicino

Wed 9/24

10:55 pm-7:57 pm

2 stops28h 02m

$596

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 9/10

7:00 am-9:20 am

2 stops19h 20m

Rome Fiumicino

Sat 9/20

10:10 am-10:00 pm

2 stops18h 50m

$631

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 8/16

4:19 pm-9:10 am

1 stop33h 51m

Rome Fiumicino

Sun 9/14

2:45 pm-9:12 am

2 stops49h 27m

$651

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 9/13

5:25 pm-9:10 am

1 stop32h 45m

Rome Fiumicino

Sat 9/27

7:20 am-8:15 pm

2 stops19h 55m

$655

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 9/13

5:30 pm-10:00 am

2 stops33h 30m

Rome Fiumicino

Sat 9/20

6:55 pm-1:30 pm

2 stops25h 35m

$685

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 8/10

10:47 am-2:30 pm

2 stops20h 43m

$297

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Fri 11/21

4:05 pm-8:55 am

2 stops57h 50m

$401

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Showing 1-10 of 17 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 June 27, 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 86 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 $1,141). 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 June 30, 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 June 30, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and United 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
7,973 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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!
KLM
7.8
Good
1,365 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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
8,852 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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!
Scandinavian Airlines
7.3
Good
1,413 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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
7,973 reviews

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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 Air Canada. Our recent data shows that you can find tickets from as low as $565 on this airline. Additional options worth looking into are KLM and United Airlines, starting at $566 and $570 round-trip. Air Canada is priced at 46% 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 Air Canada, which is currently one of the cheapest options available, starting at $401. United Airlines flights start at $424 while deals on KLM start at $468 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, 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 $1,141). 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Fiumicino
Gaeta
Ciampino
Montepulciano

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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 June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$670Average$939FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$675Average$1,117FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$687Average$1,207FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$708Average$1,248FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$713Average$1,050FlexibilityNo cancel feeOn-time71%
IberiaCheapest$739Average$1,273FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$784Average$1,153FlexibilityNo cancel feeOn-time67%
KLMCheapest$800Average$1,125FlexibilityNo cancel feeOn-time75%

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