HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$444+ 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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
ROM — STL
Jun 21 — Jun 281
Sun 6/21
Sun 6/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Rome to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 May 22, 2026.

This lol.travel deal was found by Cheapflights users on 5/20. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/410:00 am
FCO
-
STL
1 stop21h 16m
Finnair
Mon 6/81:19 pm
STL
-
FCO
1 stop15h 46m
Finnair
Deal found 5/20$888
This Cheapflightsfares deal was found by Cheapflights users on 5/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/47:05 am
FCO
-
STL
1 stop13h 50m
Multiple Airlines
Fri 11/131:00 pm
STL
-
FCO
1 stop12h 30m
Multiple Airlines
Deal found 5/17$913
This Gotogate deal was found by Cheapflights users on 5/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/311:30 am
FCO
-
STL
1 stop15h 55m
Air Canada
Sun 6/71:05 pm
STL
-
FCO
1 stop15h 40m
Air Canada
Deal found 5/19$933
This Gotogate deal was found by Cheapflights users on 5/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/411:30 am
FCO
-
STL
2 stops15h 39m
Air Canada
Mon 6/82:15 pm
STL
-
FCO
1 stop13h 05m
Air Canada
Deal found 5/20$937
This Gotogate deal was found by Cheapflights users on 5/21. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/62:20 pm
FCO
-
STL
1 stop13h 05m
Air Canada
Wed 6/108:40 am
STL
-
FCO
2 stops17h 35m
Air Canada
Deal found 5/21$940
This United Airlines deal was found by Cheapflights users on 5/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:05 am
FCO
-
STL
1 stop13h 50m
United Airlines
Sun 12/66:30 am
STL
-
FCO
1 stop18h 25m
United Airlines
Deal found 5/17$942
This United Airlines deal was found by Cheapflights users on 5/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/47:05 am
FCO
-
STL
2 stops18h 04m
United Airlines
Fri 11/139:23 am
STL
-
FCO
2 stops15h 32m
United Airlines
Deal found 5/17$948

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 May 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$888
(lol.travel)

One-way from

$444
(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
Search Deals
One-way flight from Rome (ROM) to Lambert-St Louis
Search Deals

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 May 22, 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 10/1

7:10 am-8:00 pm

2 stops19h 50m

Lambert-St Louis

Mon 10/5

12:10 pm-9:15 am

1 stop14h 05m

$955

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 10/1

1:20 pm-1:25 pm

1 stop31h 05m

Lambert-St Louis

Mon 10/5

6:00 am-7:55 am

1 stop18h 55m

$962
Quickest round-trip

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sat 6/6

2:20 pm-11:29 pm

2 stops16h 09m

Lambert-St Louis

Wed 6/10

8:40 am-9:15 am

2 stops17h 35m

$978

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 6/4

6:30 am-4:46 pm

2 stops17h 16m

Lambert-St Louis

Mon 6/8

9:21 am-11:00 am

2 stops18h 39m

$980

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 7/2

12:45 pm-11:56 pm

2 stops18h 11m

Lambert-St Louis

Mon 12/14

5:45 pm-5:25 pm

2 stops16h 40m

$1,041

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 7/3

9:00 am-11:56 pm

2 stops21h 56m

Lambert-St Louis

Mon 12/14

5:45 pm-5:25 pm

2 stops16h 40m

$1,047
Cheapest one-way

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Mon 10/12

6:25 am-7:15 pm

3 stops43h 50m

$503

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 9/29

10:45 pm-9:40 am

3 stops41h 55m

$517

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 10/6

11:05 am-11:25 pm

1 stop19h 20m

$593
Quickest one-way

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 9/16

1:10 pm-11:33 pm

1 stop17h 23m

$599

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/19

Showing 1-10 of 14 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 19h 50m. Air Canada provides one of the quickest options available for as low as $955. 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.

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

    The cheapest airlines for a one-way flight from Rome to St. Louis are American Airlines ($546), British Airways ($596), and Aer Lingus ($603).

  • 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
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Rome to St. Louis

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

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.