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St. Louis

$436+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
ROM — STL
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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Cheap 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 January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$739
(British Airways)

One-way from

$436
(Kiwi.com)
Provider with most accurate pricing for Rome (ROM)-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Rome (ROM)-Lambert-St Louis flights.
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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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Find 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 January 8, 2026.

This American Airlines deal was found by Cheapflights users on 1/8. 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.
Thu 8/2710:00 amFCO - STL
1 stop20h 51mAmerican Airlines
Sat 9/128:07 pmSTL - FCO
2 stops17h 03mAmerican Airlines
Deal found 1/8$735
This American Airlines deal was found by Cheapflights users on 1/6. 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.
Mon 8/2412:15 pmFCO - STL
1 stop14h 18mAmerican Airlines
Sun 9/138:07 pmSTL - FCO
2 stops16h 08mAmerican Airlines
Deal found 1/6$736
This British Airways deal was found by Cheapflights users on 1/6. 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 8/2710:00 amFCO - STL
1 stop17h 19mBritish Airways
Tue 9/1510:00 pmSTL - FCO
1 stop17h 50mBritish Airways
Deal found 1/6$737
This British Airways deal was found by Cheapflights users on 1/5. 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 2/201:10 pmFCO - STL
1 stop16h 42mBritish Airways
Fri 2/276:36 pmSTL - FCO
2 stops16h 34mBritish Airways
Deal found 1/5$739
This American Airlines deal was found by Cheapflights users on 1/5. 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.
Thu 1/227:30 amFCO - STL
2 stops17h 44mAmerican Airlines
Mon 1/2611:05 amSTL - FCO
2 stops20h 50mAmerican Airlines
Deal found 1/5$744
This American Airlines deal was found by Cheapflights users on 1/7. 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.
Fri 1/237:30 amFCO - STL
2 stops22h 14mAmerican Airlines
Tue 1/272:54 pmSTL - FCO
2 stops14h 26mAmerican Airlines
Deal found 1/7$745
This Expedia deal was found by Cheapflights users on 1/6. 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 8/277:20 amFCO - STL
2 stops18h 54mBritish Airways
Sat 9/128:07 pmSTL - FCO
2 stops15h 53mBritish Airways
Deal found 1/6$748
This American Airlines deal was found by Cheapflights users on 1/6. 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.
Mon 8/2410:00 amFCO - STL
1 stop16h 14mAmerican Airlines
Wed 9/96:20 amSTL - FCO
1 stop17h 45mAmerican Airlines
Deal found 1/6$749
This Iberia deal was found by Cheapflights users on 1/5. 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.
Fri 2/201:10 pmFCO - STL
1 stop16h 42mIberia
Fri 2/272:00 pmSTL - FCO
1 stop12h 00mIberia
Deal found 1/5$750
This Iberia deal was found by Cheapflights users on 1/6. 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 1/147:30 amFCO - STL
2 stops17h 44mIberia
Wed 1/212:54 pmSTL - FCO
2 stops16h 01mIberia
Deal found 1/6$771
This Gurufare deal was found by Cheapflights users on 1/7. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/2212:00 pmFCO - STL
2 stops37h 00mMultiple Airlines
Sun 3/12:19 pmSTL - FCO
2 stops17h 11mMultiple Airlines
Deal found 1/7$775

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 January 8, 2026.
Use the filters below to find and compare flights from Rome to St. Louis that are best for you.

Fly from

Rome

Fly to

St. Louis

Route

Depart

Return

Price

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 2/20

1:10 pm-10:52 pm

1 stop16h 42m

Lambert-St Louis

Fri 2/27

6:36 pm-6:10 pm

2 stops16h 34m

$739

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 1/21

7:00 pm-8:51 am

2 stops20h 51m

Lambert-St Louis

Sun 1/25

2:54 pm-2:30 pm

2 stops16h 36m

$744

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 1/22

7:30 am-6:14 pm

2 stops17h 44m

Lambert-St Louis

Mon 1/26

11:05 am-2:55 pm

2 stops20h 50m

$744

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 1/23

7:30 am-6:14 pm

2 stops17h 44m

Lambert-St Louis

Tue 1/27

2:54 pm-12:20 pm

2 stops14h 26m

$745

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 2/20

1:10 pm-10:52 pm

1 stop16h 42m

Lambert-St Louis

Fri 2/27

2:00 pm-9:00 am

1 stop12h 00m

$750

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sun 2/22

12:00 pm-6:00 pm

2 stops37h 00m

Lambert-St Louis

Sun 3/1

2:19 pm-2:30 pm

2 stops17h 11m

$775

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 2/20

1:10 pm-11:35 pm

2 stops17h 25m

Lambert-St Louis

Fri 2/27

6:57 pm-6:10 pm

2 stops16h 13m

$793

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Fri 5/15

10:00 am-10:14 pm

1 stop19h 14m

Lambert-St Louis

Fri 5/22

6:12 pm-10:20 am

1 stop33h 08m

$811

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sun 1/25

7:05 am-1:55 pm

1 stop13h 50m

Lambert-St Louis

Sun 5/10

3:30 pm-5:45 pm

1 stop19h 15m

$822

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Mon 5/11

7:05 pm-11:59 pm

2 stops35h 54m

$524

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 16 results
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Compare providers for flights from Rome to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Rome to St. Louis in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Rome-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Rome-St. Louis flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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

What is the cheapest month to book a flight from Rome to St. Louis?

Currently, April is the cheapest month in which you can book a flight from Rome to St. Louis (average of $793). Flying from Rome to St. Louis in November is currently the most expensive (average of $1,471). 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.

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 16h 42m. British Airways provides one of the quickest options available for as low as $739. 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.

  • What is the cheapest month to book a flight from Rome to St. Louis?

    Currently, April is the cheapest month in which you can book a flight from Rome to St. Louis (average of $793). Flying from Rome to St. Louis in November is currently the most expensive (average of $1,471). 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
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