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$516+ Cheap flights from Fiumicino (FCO) to St. Louis (STL)

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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
FCO — STL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Leonardo da Vinci/Fiumicino to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Leonardo da Vinci/Fiumicino (FCO) to St. Louis (STL). 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 12, 2025.

Round-trip from

$886
(Delta)

One-way from

$516
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$1,040
From Rome Fiumicino to Lambert-St Louis
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One-way flight from Rome Fiumicino to Lambert-St Louis
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Highest demand for flights based on searches. 4% potential increase in price ($49 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($20 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 Leonardo da Vinci/Fiumicino to St. Louis

Cheapest flights from Leonardo da Vinci/Fiumicino to St. Louis
Explore the most affordable flight options available from Leonardo da Vinci/Fiumicino to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/269:00 amFCO - STL
2 stops21h 20mDelta
Sat 8/25:45 pmSTL - FCO
2 stops16h 45mDelta
Deal found 6/11$886
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/3011:05 amFCO - STL
1 stop19h 46mAmerican Airlines
Sat 12/137:13 amSTL - FCO
1 stop20h 32mAmerican Airlines
Deal found 6/11$893
This Billigflug deal was found by Cheapflights users on 6/10. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/2510:00 amFCO - STL
1 stop16h 35mMultiple Airlines
Sun 6/296:00 amSTL - FCO
1 stop20h 00mMultiple Airlines
Deal found 6/10$897
This British Airways deal was found by Cheapflights users on 6/10. 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 6/1810:00 amFCO - STL
1 stop20h 19mBritish Airways
Sun 6/227:20 amSTL - FCO
1 stop18h 40mBritish Airways
Deal found 6/10$912
This Expedia deal was found by Cheapflights users on 6/10. 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.
Wed 6/188:25 pmFCO - STL
2 stops31h 05mIberia
Sun 6/228:35 amSTL - FCO
1 stop17h 25mIberia
Deal found 6/10$939
This Air Canada deal was found by Cheapflights users on 6/10. 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 6/2510:00 amFCO - STL
2 stops16h 58mAir Canada
Sun 6/291:30 pmSTL - FCO
1 stop12h 45mAir Canada
Deal found 6/10$1,006
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Fri 7/2511:30 amFCO - STL
1 stop16h 20mUnited Airlines
Fri 8/11:20 pmSTL - FCO
1 stop11h 35mUnited Airlines
Deal found 6/10$1,010

Cheapflights Fare Finder

Customize your flight search to find flights from Leonardo da Vinci/Fiumicino to St. Louis 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 12, 2025.
Use the filters below to find and compare flights from Rome Fiumicino Airport to St. Louis that are best for you.

Fly from

Leonardo da Vinci/Fiumicino

Fly to

St. Louis

Route

Depart

Return

Price

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sat 7/26

9:00 am-8:25 pm

1 stop18h 25m

Lambert-St Louis

Sat 8/2

10:30 am-11:30 am

2 stops18h 00m

$886

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 7/30

11:05 am-11:51 pm

1 stop19h 46m

Lambert-St Louis

Sat 12/13

7:13 am-10:45 am

1 stop20h 32m

$893

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 6/25

10:00 am-7:35 pm

1 stop16h 35m

Lambert-St Louis

Sun 6/29

6:00 am-9:00 am

1 stop20h 00m

$897

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 6/25

10:00 am-7:58 pm

2 stops16h 58m

Lambert-St Louis

Sun 6/29

1:30 pm-9:15 am

1 stop12h 45m

$1,006

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 7/25

11:30 am-8:50 pm

1 stop16h 20m

Lambert-St Louis

Fri 8/1

1:20 pm-7:55 am

1 stop11h 35m

$1,010

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 6/25

6:55 am-6:20 pm

2 stops18h 25m

Lambert-St Louis

Sun 6/29

1:24 pm-11:30 am

2 stops15h 06m

$1,291

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 10/7

7:15 am-9:07 am

3 stops32h 52m

$516

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sun 9/7

7:30 am-8:23 pm

2 stops19h 53m

$597

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 7/11

10:45 am-10:45 pm

2 stops43h 00m

$707

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sun 9/7

10:20 am-9:06 pm

1 stop17h 46m

$792

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 15 results
1
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Best time to book a flight from Leonardo da Vinci/Fiumicino to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Leonardo da Vinci/Fiumicino 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 Rome Fiumicino Airport to St. Louis

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated June 12, 2025.
See what other customers who have flown with Delta, Finnair and United Airlines from Rome to St. Louis have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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!
Turkish Airlines
7.3
Good
3,848 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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 Leonardo da Vinci/Fiumicino to St. Louis. 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 into for flights to St. Louis from Rome Fiumicino?

    Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Rome Fiumicino. On average, Lambert-St Louis has 0 inbound flights from Rome Fiumicino per day from 0 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • What are the cheapest airlines flying from Rome Fiumicino Airport to St. Louis round-trip?

    Cheapflights users have booked flights from Rome Fiumicino Airport to St. Louis round-trip from $886. Other airlines that can offer you cheap pricing are American Airlines, from $893, and Air Canada, from $1,006. Delta is priced at 7% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Rome Fiumicino Airport to St. Louis one-way?

    One-way options have recently been found by users for as low as $597 on Aer Lingus. Other airlines that offer cheap prices include Turkish Airlines from $707 and Iberia from $792 one-way.

  • Can I find deals for flights from Leonardo da Vinci/Fiumicino to St. Louis that include hotel bookings?

    Yes. In addition to deals on Leonardo da Vinci/Fiumicino to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Leonardo da Vinci/Fiumicino to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Leonardo da Vinci/Fiumicino to St. Louis.

  • Can I find deals for business class flights from Leonardo da Vinci/Fiumicino to St. Louis?

    Yes. Cheapflights offers flight deals from Leonardo da Vinci/Fiumicino to St. Louis 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 Rome Fiumicino Airport to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Rome Fiumicino Airport to St. Louis (average of $311). Flying from Rome Fiumicino Airport to St. Louis in March is currently the most expensive (average of $356). 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
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Festus
Alton
Farmington

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