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 $775. Other airlines that can offer you cheap pricing are United Airlines, from $785, and Delta, from $802. Users have found that Air Canada is 18% 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 Aer Lingus ($584), British Airways ($718), and Turkish Airlines ($724).

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, December can be a great choice for travel to St. Louis. Flights to St. Louis from Rome in December are about $953 on average during December, but can be found for as low as $787.

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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Rome-St. Louis flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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.

$433+ Flights from Rome to St. Louis

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Cheap flight deals from Rome to St. Louis

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$775 (Booking.com)
One-way from	$433 (Kiwi.com)
Popular in	August
Cheapest in	December
Average price	$939

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.

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. 10% potential increase in price ($111 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

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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 April 24, 2025.

Thu 9/187:10 amFCO - STL

2 stops19h 47mAir Canada

Wed 9/241:30 pmSTL - FCO

1 stop12h 45mAir Canada

Deal found 4/23

$775

Wed 5/711:30 amFCO - STL

1 stop15h 28mUnited Airlines

Mon 5/199:40 amSTL - FCO

1 stop15h 15mUnited Airlines

Deal found 4/23

$785

Wed 5/76:30 amFCO - STL

2 stops21h 19mDelta

Mon 5/196:05 pmSTL - FCO

2 stops15h 30mDelta

Deal found 4/23

$802

Sat 6/710:55 pmFCO - STL

2 stops27h 48mMultiple Airlines

Sat 6/147:30 amSTL - FCO

3 stops34h 25mMultiple Airlines

Deal found 4/23

$1,272

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 24, 2025.

Thu 9/187:10 amFCO - STL

2 stops19h 47mAir Canada

Wed 9/241:30 pmSTL - FCO

1 stop12h 45mAir Canada

Deal found 4/23

$775

Wed 5/711:30 amFCO - STL

1 stop15h 28mUnited Airlines

Mon 5/199:40 amSTL - FCO

1 stop15h 15mUnited Airlines

Deal found 4/23

$785

Wed 5/76:30 amFCO - STL

2 stops21h 19mDelta

Mon 5/196:05 pmSTL - FCO

2 stops15h 30mDelta

Deal found 4/23

$802

Sat 6/710:55 pmFCO - STL

2 stops27h 48mMultiple Airlines

Sat 6/147:30 amSTL - FCO

3 stops34h 25mMultiple Airlines

Deal found 4/23

$1,272

Last-minute flights from Rome to St. Louis
Discover last-minute flight deals from Rome to St. Louis. Data last updated April 24, 2025 and is based on user searches.

Wed 5/711:30 amFCO - STL

1 stop15h 28mUnited Airlines

Mon 5/199:40 amSTL - FCO

1 stop15h 15mUnited Airlines

Deal found 4/23

$785

Wed 5/76:30 amFCO - STL

2 stops21h 19mDelta

Mon 5/196:05 pmSTL - FCO

2 stops15h 30mDelta

Deal found 4/23

$802

Wed 5/711:30 amFCO - STL

1 stop15h 28mAir Canada

Mon 5/197:30 amSTL - FCO

2 stops18h 45mAir Canada

Deal found 4/23

$803

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 24, 2025.

Mon 5/511:20 pmFCO - STL

3 stops55h 46mMultiple Airlines

Deal found 4/23

$433

Wed 5/77:30 amFCO - STL

2 stops21h 22mAer Lingus

Deal found 4/23

$584

Sun 9/711:05 amFCO - STL

1 stop16h 18mBritish Airways

Deal found 4/22

$718

Mon 5/57:00 amFCO - STL

2 stops38h 47mTurkish Airlines

Deal found 4/23

$724

Wed 5/77:00 amFCO - STL

1 stop13h 30mLufthansa

Deal found 4/23

$777

Wed 6/1110:00 amFCO - STL

1 stop15h 20mFinnair

Deal found 4/23

$805

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

Thu 9/18

7:10 am-7:57 pm

2 stops19h 47m

Lambert-St Louis

Wed 9/24

1:30 pm-9:15 am

1 stop12h 45m

$775

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 5/7

11:30 am-7:58 pm

1 stop15h 28m

Lambert-St Louis

Mon 5/19

9:40 am-7:55 am

1 stop15h 15m

$785

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 5/7

6:30 am-8:49 pm

2 stops21h 19m

Lambert-St Louis

Mon 5/19

6:05 pm-4:35 pm

2 stops15h 30m

$802

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sat 6/7

10:55 pm-7:43 pm

2 stops27h 48m

Lambert-St Louis

Sat 6/14

7:30 am-12:55 am

3 stops34h 25m

$1,272

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Mon 5/5

11:20 pm-12:06 am

3 stops55h 46m

$433

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 5/7

7:30 am-9:52 pm

2 stops21h 22m

$584

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Sun 9/7

11:05 am-8:23 pm

1 stop16h 18m

$718

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Tue 7/15

10:45 am-10:45 pm

2 stops43h 00m

$725

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 5/7

7:00 am-1:30 pm

1 stop13h 30m

$777

RomeSt. Louis

FCO - STL

FCOSTL

Rome Fiumicino

Wed 6/11

10:00 am-6:20 pm

1 stop15h 20m

$805

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

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*
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Rome-St. Louis flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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

7,920 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

7,920 reviews

Delta

8.0

Very good

7,920 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

1,272 reviews

Delta

8.0

Very good

7,920 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

United Airlines

7.4

Good

8,685 reviews

Delta

8.0

Very good

7,920 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

Turkish Airlines

7.3

Good

3,775 reviews

Delta

8.0

Very good

7,920 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 Canada

7.0

Good

9,192 reviews

Delta

8.0

Very good

7,920 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 $775. Other airlines that can offer you cheap pricing are United Airlines, from $785, and Delta, from $802. Users have found that Air Canada is 18% 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 Aer Lingus ($584), British Airways ($718), and Turkish Airlines ($724).
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

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$433+ 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 5/5. 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

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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 24, 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 24, 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 24, 2025.