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St. Louis

$428+ Cheap flights from Rome (ROM) 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
ROM — STL
Aug 22 — Aug 291
Sat 8/22
Sat 8/29
1 adult, Economy
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Cheap flight deals from Rome to St. Louis

Cheapest flights from Rome to St. Louis
Explore the most affordable flight options available from Rome to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 23, 2026.

This United Airlines deal was found by Cheapflights users on 7/21. 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.
Thu 11/59:55 am
FCO
-
STL
2 stops16h 34m
United Airlines
Sun 11/86:00 am
STL
-
FCO
1 stop18h 45m
United Airlines
Deal found 7/21$938
This Bravofly deal was found by Cheapflights users on 7/21. 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:05 am
FCO
-
STL
2 stops16h 51m
Lufthansa
Sun 11/157:04 pm
STL
-
FCO
2 stops16h 11m
Lufthansa
Deal found 7/21$946
This Iberia deal was found by Cheapflights users on 7/19. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/510:00 am
FCO
-
STL
1 stop21h 14m
Iberia
Tue 9/291:49 pm
STL
-
FCO
1 stop12h 21m
Iberia
Deal found 7/19$1,008

Find flight deals from Rome to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Rome (ROM) 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 July 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$938
(United Airlines)

One-way from

$428
(Kiwi.com)
Provider with most accurate pricing for Rome (ROM)-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Rome (ROM)-Lambert-St Louis flights.
Search Deals
From Rome (ROM) to Lambert-St Louis
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One-way flight from Rome (ROM) to Lambert-St Louis
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Rome 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 July 23, 2026.
Use the filters below to find and compare flights from Rome to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 11/5

9:55 am-7:29 pm

2 stops16h 34m

Lambert-St Louis

Sun 11/8

6:00 am-7:45 am

1 stop18h 45m

$939

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 8/5

6:30 am-3:10 pm

2 stops15h 40m

Lambert-St Louis

Tue 9/29

11:21 am-11:25 am

2 stops17h 04m

$1,040

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 8/4

6:30 am-8:42 pm

2 stops21h 12m

Lambert-St Louis

Wed 9/30

5:59 pm-4:35 pm

2 stops15h 36m

$1,043
Quickest round-trip

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 8/11

11:30 am-6:42 pm

1 stop14h 12m

Lambert-St Louis

Mon 6/7

10:23 am-7:55 am

1 stop14h 32m

$1,067

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Mon 8/10

12:55 pm-11:44 pm

1 stop17h 49m

Lambert-St Louis

Sun 6/6

1:27 pm-7:55 am

1 stop11h 28m

$1,069

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 8/6

10:20 am-7:23 pm

2 stops16h 03m

Lambert-St Louis

Sat 6/12

1:30 pm-12:20 pm

1 stop15h 50m

$1,069

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 8/5

10:20 am-7:26 pm

1 stop16h 06m

Lambert-St Louis

Wed 3/17

7:30 am-12:05 pm

1 stop22h 35m

$1,070

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 8/5

2:20 pm-11:57 pm

1 stop16h 37m

Lambert-St Louis

Mon 3/22

1:08 pm-7:45 am

1 stop12h 37m

$1,070

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 8/4

10:20 am-7:26 pm

1 stop16h 06m

Lambert-St Louis

Sat 6/5

1:30 pm-12:20 pm

1 stop15h 50m

$1,070

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 8/6

10:20 am-7:23 pm

2 stops16h 03m

Lambert-St Louis

Fri 8/28

7:00 am-7:35 am

1 stop17h 35m

$1,070

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/22

Showing 1-10 of 19 resultsSorted by cheapest first
1
2
  • Most accurate provider: When it comes to deals on Rome-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Rome-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Rome-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Rome-St. Louis 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 Rome-St. Louis 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 Rome to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Rome 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 to St. Louis

No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Rome 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?

    Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Rome. On average, Lambert-St Louis has 0 inbound flights from Rome 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 to St. Louis?

    A quick flight from Rome to St. Louis can take about 18h 17m. United Airlines provides one of the quickest options available for as low as $1,036. The distance between Rome and St. Louis is about 5050 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Rome to St. Louis that include hotel bookings?

    Yes. In addition to deals on Rome to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Rome to St. Louis?

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

  • Can I find deals for business class flights from Rome to St. Louis?

    Yes. Cheapflights offers flight deals from Rome 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.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Farmington

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