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$459+ 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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
FCO — STL
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$749
(British Airways)

One-way from

$459
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$967
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. 5% potential increase in price ($54 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 11, 2025.

This British Airways deal was found by Cheapflights users on 9/10. 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.
Thu 9/251:10 pmFCO - STL
1 stop14h 56mBritish Airways
Mon 9/291:03 pmSTL - FCO
2 stops15h 27mBritish Airways
Deal found 9/10$749
This British Airways deal was found by Cheapflights users on 9/11. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2610:20 amFCO - STL
1 stop17h 46mBritish Airways
Tue 9/306:10 amSTL - FCO
1 stop20h 00mBritish Airways
Deal found 9/11$758
This Gotogate deal was found by Cheapflights users on 9/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2611:30 amFCO - STL
1 stop15h 27mAir Canada
Tue 9/309:15 amSTL - FCO
2 stops17h 00mAir Canada
Deal found 9/11$808
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:30 amFCO - STL
2 stops16h 35mDelta
Mon 9/296:00 pmSTL - FCO
2 stops13h 50mDelta
Deal found 9/10$820
This Air Canada deal was found by Cheapflights users on 9/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2611:30 amFCO - STL
2 stops34h 48mMultiple Airlines
Tue 9/3012:25 pmSTL - FCO
2 stops14h 50mMultiple Airlines
Deal found 9/11$824
This Expedia deal was found by Cheapflights users on 9/10. 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.
Thu 9/2512:45 pmFCO - STL
2 stops17h 39mKLM
Mon 9/297:05 pmSTL - FCO
2 stops20h 40mKLM
Deal found 9/10$826
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2710:20 amFCO - STL
1 stop17h 28mAmerican Airlines
Wed 10/16:00 amSTL - FCO
1 stop18h 05mAmerican Airlines
Deal found 9/10$861
This Expedia deal was found by Cheapflights users on 9/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:35 pmFCO - STL
2 stops33h 14mMultiple Airlines
Sun 11/26:45 pmSTL - FCO
2 stops46h 30mMultiple Airlines
Deal found 9/11$879
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/279:00 amFCO - STL
2 stops21h 09mDelta
Wed 10/15:11 pmSTL - FCO
2 stops16h 24mDelta
Deal found 9/10$888
This Expedia deal was found by Cheapflights users on 9/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:35 pmFCO - STL
2 stops33h 14mBritish Airways
Sun 11/211:42 amSTL - FCO
1 stop16h 03mBritish Airways
Deal found 9/11$892
This lol.travel deal was found by Cheapflights users on 9/10. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/128:00 amFCO - STL
2 stops22h 58mUnited Airlines
Wed 10/151:30 pmSTL - FCO
1 stop12h 45mUnited Airlines
Deal found 9/10$1,168

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 September 11, 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

Thu 9/25

1:10 pm-9:06 pm

1 stop14h 56m

Lambert-St Louis

Mon 9/29

1:03 pm-11:30 am

2 stops15h 27m

$749

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 9/26

10:20 am-9:06 pm

1 stop17h 46m

Lambert-St Louis

Tue 9/30

6:10 am-9:10 am

1 stop20h 00m

$758

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 1/7

7:05 am-10:58 pm

2 stops22h 53m

Lambert-St Louis

Wed 6/10

9:10 am-10:15 am

1 stop18h 05m

$782

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 9/26

11:30 am-7:57 pm

1 stop15h 27m

Lambert-St Louis

Tue 9/30

9:15 am-9:15 am

2 stops17h 00m

$808

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 9/25

6:30 am-4:05 pm

2 stops16h 35m

Lambert-St Louis

Mon 9/29

6:00 pm-2:50 pm

2 stops13h 50m

$820

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 9/26

11:30 am-3:18 pm

2 stops34h 48m

Lambert-St Louis

Tue 9/30

12:25 pm-10:15 am

2 stops14h 50m

$824

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 9/25

12:45 pm-11:24 pm

2 stops17h 39m

Lambert-St Louis

Mon 9/29

7:05 pm-10:45 pm

2 stops20h 40m

$826

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sat 9/27

10:20 am-8:32 pm

2 stops17h 12m

Lambert-St Louis

Wed 10/1

6:00 am-7:05 am

1 stop18h 05m

$861

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sun 10/26

8:35 pm-11:49 pm

2 stops33h 14m

Lambert-St Louis

Sun 11/2

6:45 pm-12:15 am

2 stops46h 30m

$879

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sat 9/27

9:00 am-11:09 pm

2 stops21h 09m

Lambert-St Louis

Wed 10/1

5:11 pm-4:35 pm

2 stops16h 24m

$888

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 19 results
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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.

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.

  • How long is the flight from Rome Fiumicino Airport to St. Louis?

    For as low as $749, British Airways can have you in St. Louis from Rome Fiumicino Airport in 14h 56m. The distance between Rome Fiumicino Airport and St. Louis is about 5050 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 St. Louis?

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