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

Cheapflights users have booked flights from Rome to St. Louis round-trip from $794. Other airlines that can offer you cheap pricing are Delta, from $795, and KLM, from $799. Users have found that British Airways is 14% cheaper than the other options available to this destination.

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 WestJet ($514), Aer Lingus ($598), and Turkish Airlines ($686).

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

Currently, August is the cheapest month in which you can book a flight from Rome to St. Louis (average of $311). Flying from Rome 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.

What is the cheapest day to fly from Rome to St. Louis?

Travelers seeking maximum savings on their Rome to St. Louis flight should consider departing on Wednesday mornings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from Rome to St. Louis?

Leaving on a Wednesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 20% on the overall cost on flights from Rome to St. Louis.

What is the cheapest month to fly from Rome to St. Louis?

Due to multiple factors, expect to potentially pay more when booking in August. For low rates, October can be a great choice for travel to St. Louis. Flights to St. Louis from Rome in October are about $924 on average during October, but can be found for as low as $780.

What is the cheapest time of day to fly from ROM to STL?

A simple way to save on the total cost of your ticket is to fly from Rome to St. Louis at noon. If you’re flexible enough to do this you can expect to save up to 2% on your trip compared to booking a flight in the morning.

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.

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.

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.

$400+ Flights from Rome to St. Louis

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Cheap flight deals from Rome to St. Louis

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$788 (Billigflug)
One-way from	$400 (Mytrip)
Popular in	August
Cheapest in	October
Average price	$939

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

Highest demand for flights based on searches. 13% potential increase in price ($139 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

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 April 2, 2025.

Tue 4/1511:05 amFCO - STL

1 stop13h 57mMultiple Airlines

Sat 4/195:27 pmSTL - FCO

1 stop31h 38mMultiple Airlines

Deal found 4/1

$788

Wed 4/1610:00 amFCO - STL

1 stop16h 29mBritish Airways

Sun 4/206:00 pmSTL - FCO

2 stops14h 55mBritish Airways

Deal found 4/1

$794

Wed 4/166:30 amFCO - STL

2 stops22h 06mDelta

Sun 4/2010:50 amSTL - FCO

2 stops17h 40mDelta

Deal found 3/31

$795

Wed 4/166:30 amFCO - STL

2 stops16h 56mKLM

Sun 4/2010:50 amSTL - FCO

1 stop13h 45mKLM

Deal found 3/31

$799

Tue 4/1511:05 amFCO - STL

1 stop13h 57mAmerican Airlines

Sat 4/196:00 pmSTL - FCO

1 stop32h 00mAmerican Airlines

Deal found 3/31

$806

Thu 5/297:10 amFCO - STL

2 stops36h 26mUnited Airlines

Sun 6/88:10 amSTL - FCO

2 stops16h 25mUnited Airlines

Deal found 4/1

$812

Thu 5/298:45 amFCO - STL

2 stops19h 30mLufthansa

Sun 6/85:27 pmSTL - FCO

1 stop31h 28mLufthansa

Deal found 4/1

$813

Thu 5/2911:30 amFCO - STL

2 stops32h 06mAir Canada

Sat 6/71:30 pmSTL - FCO

2 stops37h 45mAir Canada

Deal found 4/1

$844

Tue 4/1510:40 amFCO - STL

2 stops18h 32mFinnair

Sat 4/196:00 pmSTL - FCO

2 stops17h 00mFinnair

Deal found 4/1

$1,008

Tue 4/157:35 amFCO - STL

2 stops17h 27mIberia

Sat 4/196:00 pmSTL - FCO

2 stops17h 15mIberia

Deal found 4/1

$1,052

Thu 5/297:35 pmFCO - STL

2 stops32h 04mScandinavian Airlines

Sat 6/712:59 pmSTL - FCO

2 stops39h 06mScandinavian Airlines

Deal found 4/1

$1,097

Wed 9/1711:10 amFCO - STL

2 stops19h 15mAer Lingus

Fri 9/196:24 pmSTL - FCO

2 stops18h 26mAer Lingus

Deal found 4/1

$1,169

Best flights from Rome to St. Louis
Discover carefully curated flight deals from Rome to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 2, 2025.

Tue 4/1511:05 amFCO - STL

1 stop13h 57mMultiple Airlines

Sat 4/195:27 pmSTL - FCO

1 stop31h 38mMultiple Airlines

Deal found 4/1

$788

Wed 4/1610:00 amFCO - STL

1 stop16h 29mBritish Airways

Sun 4/206:00 pmSTL - FCO

2 stops14h 55mBritish Airways

Deal found 4/1

$794

Wed 4/166:30 amFCO - STL

2 stops22h 06mDelta

Sun 4/2010:50 amSTL - FCO

2 stops17h 40mDelta

Deal found 3/31

$795

Wed 4/166:30 amFCO - STL

2 stops16h 56mKLM

Sun 4/2010:50 amSTL - FCO

1 stop13h 45mKLM

Deal found 3/31

$799

Tue 4/1511:05 amFCO - STL

1 stop13h 57mAmerican Airlines

Sat 4/196:00 pmSTL - FCO

1 stop32h 00mAmerican Airlines

Deal found 3/31

$806

Thu 5/297:10 amFCO - STL

2 stops36h 26mUnited Airlines

Sun 6/81:30 pmSTL - FCO

1 stop12h 45mUnited Airlines

Deal found 4/1

$812

Thu 5/298:45 amFCO - STL

2 stops19h 30mLufthansa

Sun 6/85:27 pmSTL - FCO

1 stop31h 28mLufthansa

Deal found 4/1

$813

Thu 5/2911:30 amFCO - STL

2 stops32h 06mAir Canada

Sat 6/71:30 pmSTL - FCO

2 stops37h 45mAir Canada

Deal found 4/1

$844

Tue 4/1510:40 amFCO - STL

2 stops18h 32mFinnair

Sat 4/196:00 pmSTL - FCO

2 stops17h 00mFinnair

Deal found 4/1

$1,008

Tue 4/157:35 amFCO - STL

2 stops17h 27mIberia

Sat 4/196:00 pmSTL - FCO

2 stops17h 15mIberia

Deal found 4/1

$1,052

Thu 5/297:35 pmFCO - STL

2 stops32h 04mScandinavian Airlines

Sat 6/712:59 pmSTL - FCO

2 stops39h 06mScandinavian Airlines

Deal found 4/1

$1,097

Wed 9/1711:10 amFCO - STL

2 stops19h 15mAer Lingus

Fri 9/196:24 pmSTL - FCO

2 stops18h 26mAer Lingus

Deal found 4/1

$1,169

Last-minute flights from Rome to St. Louis
Discover last-minute flight deals from Rome to St. Louis. Data last updated April 2, 2025 and is based on user searches.

Tue 4/1511:05 amFCO - STL

1 stop13h 57mMultiple Airlines

Sat 4/195:27 pmSTL - FCO

1 stop31h 38mMultiple Airlines

Deal found 4/1

$788

Tue 4/1511:05 amFCO - STL

1 stop18h 07mAmerican Airlines

Sat 4/197:04 pmSTL - FCO

1 stop31h 46mAmerican Airlines

Deal found 3/31

$806

Tue 4/1510:40 amFCO - STL

2 stops18h 32mFinnair

Sat 4/196:00 pmSTL - FCO

2 stops17h 00mFinnair

Deal found 4/1

$1,008

Tue 4/157:35 amFCO - STL

2 stops17h 27mIberia

Sat 4/196:00 pmSTL - FCO

2 stops17h 15mIberia

Deal found 4/1

$1,052

Wed 4/1610:00 amFCO - STL

1 stop16h 29mBritish Airways

Sun 4/206:00 pmSTL - FCO

2 stops14h 55mBritish Airways

Deal found 4/1

$794

Wed 4/166:30 amFCO - STL

2 stops22h 06mDelta

Sun 4/2010:50 amSTL - FCO

2 stops17h 40mDelta

Deal found 3/31

$795

Wed 4/166:30 amFCO - STL

2 stops16h 56mKLM

Sun 4/2010:50 amSTL - FCO

1 stop13h 45mKLM

Deal found 3/31

$799

Thu 5/297:10 amFCO - STL

2 stops36h 26mUnited Airlines

Sun 6/81:30 pmSTL - FCO

1 stop12h 45mUnited Airlines

Deal found 4/1

$812

Thu 5/298:45 amFCO - STL

2 stops19h 30mLufthansa

Sun 6/85:27 pmSTL - FCO

1 stop31h 28mLufthansa

Deal found 4/1

$813

Thu 5/2911:30 amFCO - STL

2 stops32h 06mAir Canada

Sat 6/71:30 pmSTL - FCO

2 stops37h 45mAir Canada

Deal found 4/1

$844

Thu 5/297:35 pmFCO - STL

2 stops32h 04mScandinavian Airlines

Sat 6/712:59 pmSTL - FCO

2 stops39h 06mScandinavian Airlines

Deal found 4/1

$1,097

Sat 5/3112:35 pmFCO - STL

2 stops15h 56mAir France

Sun 6/81:32 pmSTL - FCO

1 stop14h 33mAir France

Deal found 4/1

$1,421

One-way flights from Rome to St. Louis
Search for one-way flight options from Rome to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 2, 2025.

Thu 6/127:05 pmFCO - STL

2 stops27h 17mMultiple Airlines

Deal found 3/30

$400

Sun 4/132:25 pmFCO - STL

2 stops40h 09mWestJet

Deal found 4/1

$514

Wed 5/77:30 amFCO - STL

2 stops18h 03mAer Lingus

Deal found 3/31

$598

Mon 5/510:45 amFCO - STL

2 stops35h 02mTurkish Airlines

Deal found 4/1

$686

Wed 5/77:00 amFCO - STL

1 stop13h 30mLufthansa

Deal found 3/31

$757

Thu 6/1211:05 amFCO - STL

1 stop16h 25mIberia

Deal found 3/30

$802

Fri 6/139:45 amFCO - STL

1 stop15h 14mDelta

Deal found 3/31

$841

Sat 5/249:45 amFCO - STL

1 stop20h 53mKLM

Deal found 3/31

$947

Sun 4/139:45 amFCO - STL

1 stop14h 38mAustrian Airlines

Deal found 4/1

$959

Mon 5/511:05 amFCO - STL

1 stop17h 47mFinnair

Deal found 4/1

$1,029

Sun 9/2810:00 amFCO - STL

1 stop19h 27mAmerican Airlines

Deal found 4/1

$1,085

Sun 4/1311:30 amFCO - STL

3 stops35h 17mUnited Airlines

Deal found 4/1

$1,567

Cheapflights Fare Finder

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

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 4/15

11:05 am-6:02 pm

1 stop13h 57m

Lambert-St Louis

Sat 4/19

5:27 pm-8:05 am

1 stop31h 38m

$788

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 4/16

10:00 am-7:29 pm

1 stop16h 29m

Lambert-St Louis

Sun 4/20

6:00 pm-3:55 pm

2 stops14h 55m

$794

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 4/16

6:30 am-9:36 pm

2 stops22h 06m

Lambert-St Louis

Sun 4/20

10:50 am-11:30 am

2 stops17h 40m

$795

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 4/16

6:30 am-4:26 pm

2 stops16h 56m

Lambert-St Louis

Sun 4/20

10:50 am-7:35 am

1 stop13h 45m

$799

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 4/15

11:05 am-6:02 pm

1 stop13h 57m

Lambert-St Louis

Sat 4/19

6:00 pm-9:00 am

1 stop32h 00m

$806

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 5/29

7:10 am-12:36 pm

2 stops36h 26m

Lambert-St Louis

Sun 6/8

8:10 am-7:35 am

2 stops16h 25m

$812

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 5/29

8:45 am-9:15 pm

2 stops19h 30m

Lambert-St Louis

Sun 6/8

5:27 pm-7:55 am

1 stop31h 28m

$813

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Thu 5/29

11:30 am-12:36 pm

2 stops32h 06m

Lambert-St Louis

Sat 6/7

1:30 pm-10:15 am

2 stops37h 45m

$844

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 4/15

10:40 am-10:12 pm

2 stops18h 32m

Lambert-St Louis

Sat 4/19

6:00 pm-6:00 pm

2 stops17h 00m

$1,008

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 4/15

7:35 am-6:02 pm

2 stops17h 27m

Lambert-St Louis

Sat 4/19

6:00 pm-6:15 pm

2 stops17h 15m

$1,052

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 25 results

Compare providers for flights from Rome to St. Louis

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 April.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 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 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

Rainfall in St. Louis 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

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

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very good

7,899 reviews

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,323 reviews

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,267 reviews

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines

7.6

Good

771 reviews

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France

7.4

Good

1,427 reviews

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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.
What are the cheapest airlines flying from Rome to St. Louis round-trip?
Cheapflights users have booked flights from Rome to St. Louis round-trip from $794. Other airlines that can offer you cheap pricing are Delta, from $795, and KLM, from $799. Users have found that British Airways is 14% cheaper than the other options available to this destination.
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 WestJet ($514), Aer Lingus ($598), and Turkish Airlines ($686).
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, August is the cheapest month in which you can book a flight from Rome to St. Louis (average of $311). Flying from Rome 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

Fenton

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$400+ 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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Rome to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Rome to St. Louis

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Round-trip from

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Popular in

Cheapest in

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Find flight deals from Rome to St. Louis

Cheapest flights from Rome to St. LouisExplore 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 April 2, 2025.

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 April 2, 2025.

Cheapflights Fare Finder

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

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 April.

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.

Cheapflights Insights

Everything you need to know about your flight from Rome 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.

Temperature in St. Louis by month

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

Reviews of airlines servicing St. Louis

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?

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

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

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

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

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

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

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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 April 2, 2025.