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

Our cheapest airline available from St. Louis to Rome Fiumicino Airport is United Airlines. Our recent data shows that you can find tickets from as low as $787 on this airline. Additional options worth looking into are Iberia and Air Canada, starting at $798 and $810 round-trip. United Airlines is priced at 25% lower than the current average price of a flight leaving 3 months from now.

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

To fly one-way, consider booking your trip with Aer Lingus, which is currently one of the cheapest options available, starting at $546. United Airlines flights start at $603 while deals on Air Canada start at $610 one-way.

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

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

What are the most popular airlines that fly from St. Louis to Rome Fiumicino Airport?

Consider American Airlines, Air Canada or British Airways when booking your flight. These represent the most popular airlines when flying from St. Louis to Rome Fiumicino Airport.

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

Users have found that flying from St. Louis to Rome Fiumicino Airport on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from St. Louis to Rome Fiumicino Airport?

Users have found that booking a flight from St. Louis to Rome Fiumicino Airport at least 40 days early can save you up to 98% on average compared to booking a flight this week. If booking 40 days before your flight isn’t an option for you, users have found flights from St. Louis to Rome Fiumicino Airport for as little as $1,320 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $1,495 for flights departing within the next 3 days.

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

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, November can be a great choice for travel to Rome Fiumicino Airport. Flights to Rome Fiumicino Airport from St. Louis in November are about $1,095 on average during November, but can be found for as low as $625.

Most accurate provider : When it comes to deals on St. Louis-Rome Fiumicino Airport flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on St. Louis-Rome Fiumicino Airport flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from St. Louis-Rome Fiumicino Airport flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Rome Fiumicino Airport 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 St. Louis-Rome Fiumicino Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from St. Louis to Rome Fiumicino?

Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Rome Fiumicino. You should not have trouble finding flights to Rome Fiumicino from Lambert-St Louis; the airport handles an average of 0 outbound flights to Rome Fiumicino per day. You should also have plenty of airline options to choose from since 8 airlines have flights from the St. Louis airport to Rome Fiumicino. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

How can I find direct flights from St. Louis to Leonardo da Vinci/Fiumicino?

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

Can I find deals for business class flights from St. Louis to Leonardo da Vinci/Fiumicino?

Yes. Cheapflights offers flight deals from St. Louis to Leonardo da Vinci/Fiumicino by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$416+ Flights from St. Louis to Rome Fiumicino Airport

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Find cheap flights from St. Louis to Leonardo da Vinci/Fiumicino 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.

Cheapflights Tip: The best prices from Lambert-St Louis to Rome Fiumicino are usually found in January or February, booked 86 days in advance, depart on a Tuesday or Monday and return on a Tuesday

Cheap flight deals from St. Louis to Leonardo da Vinci/Fiumicino

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$787 (United Airlines)
One-way from	$416 (Kiwi.com)
Popular in	June
Cheapest in	January
Average price	$1,105

Provider with most accurate pricing for Lambert-St Louis-Rome Fiumicino flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Rome Fiumicino flights.

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From Lambert-St Louis to Rome Fiumicino

Search Deals

One-way flight from Lambert-St Louis to Rome Fiumicino

Search Deals

Highest demand for flights based on searches. 20% potential increase in price ($279 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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Find flight deals from St. Louis to Leonardo da Vinci/Fiumicino

Cheapest flights from St. Louis to Leonardo da Vinci/Fiumicino
Explore the most affordable flight options available from St. Louis to Leonardo da Vinci/Fiumicino. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.

Mon 11/101:27 pmSTL - FCO

1 stop11h 18mUnited Airlines

Tue 11/2512:15 pmFCO - STL

2 stops33h 03mUnited Airlines

Deal found 4/23

$628

Tue 11/114:15 pmSTL - FCO

2 stops34h 45mAir Canada

Tue 11/2512:15 pmFCO - STL

2 stops33h 03mAir Canada

Deal found 4/23

$630

Mon 11/1011:51 amSTL - FCO

1 stop13h 04mKLM

Mon 11/2412:45 pmFCO - STL

1 stop15h 04mKLM

Deal found 4/23

$695

Sun 11/24:07 pmSTL - FCO

2 stops18h 38mBritish Airways

Sat 11/88:30 pmFCO - STL

2 stops28h 47mBritish Airways

Deal found 4/22

$726

Sun 11/212:24 pmSTL - FCO

1 stop15h 31mMultiple Airlines

Sat 11/89:40 amFCO - STL

1 stop35h 15mMultiple Airlines

Deal found 4/22

$757

Mon 9/228:26 amSTL - FCO

1 stop17h 44mIberia

Wed 10/111:05 amFCO - STL

1 stop15h 03mIberia

Deal found 4/23

$782

Mon 5/56:00 amSTL - FCO

1 stop18h 35mDelta

Tue 5/1310:10 amFCO - STL

2 stops20h 16mDelta

Deal found 4/22

$818

Wed 8/273:30 pmSTL - FCO

2 stops36h 35mScandinavian Airlines

Wed 9/311:55 amFCO - STL

2 stops39h 52mScandinavian Airlines

Deal found 4/22

$822

Mon 5/51:10 pmSTL - FCO

2 stops15h 25mLufthansa

Thu 5/157:10 amFCO - STL

2 stops15h 37mLufthansa

Deal found 4/21

$852

Sun 9/78:26 amSTL - FCO

2 stops28h 24mAer Lingus

Tue 9/2311:10 amFCO - STL

2 stops19h 39mAer Lingus

Deal found 4/22

$986

Wed 5/2110:36 amSTL - FCO

2 stops24h 24mFinnair

Wed 5/2811:05 amFCO - STL

1 stop17h 47mFinnair

Deal found 4/22

$1,120

Best flights from St. Louis to Leonardo da Vinci/Fiumicino
Discover carefully curated flight deals from St. Louis to Leonardo da Vinci/Fiumicino that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2025.

Mon 5/121:30 pmSTL - FCO

1 stop12h 45mUnited Airlines

Tue 5/2011:30 amFCO - STL

2 stops36h 53mUnited Airlines

Deal found 4/23

$787

Mon 5/1210:31 amSTL - FCO

1 stop15h 39mIberia

Tue 5/2011:05 amFCO - STL

1 stop17h 47mIberia

Deal found 4/23

$798

Mon 5/127:30 amSTL - FCO

2 stops18h 45mAir Canada

Tue 5/209:55 amFCO - STL

2 stops17h 03mAir Canada

Deal found 4/23

$810

Mon 5/56:00 amSTL - FCO

1 stop18h 35mDelta

Tue 5/1310:10 amFCO - STL

2 stops20h 16mDelta

Deal found 4/22

$818

Mon 5/126:00 amSTL - FCO

1 stop20h 10mBritish Airways

Mon 5/198:30 pmFCO - STL

2 stops26h 52mBritish Airways

Deal found 4/22

$841

Mon 5/51:10 pmSTL - FCO

2 stops15h 25mLufthansa

Thu 5/157:10 amFCO - STL

2 stops15h 37mLufthansa

Deal found 4/21

$852

Mon 5/54:45 pmSTL - FCO

1 stop36h 35mMultiple Airlines

Mon 5/122:30 pmFCO - STL

1 stop29h 06mMultiple Airlines

Deal found 4/21

$859

Mon 5/512:51 pmSTL - FCO

2 stops22h 54mScandinavian Airlines

Tue 5/137:35 pmFCO - STL

2 stops35h 03mScandinavian Airlines

Deal found 4/22

$937

Wed 4/3012:00 pmSTL - FCO

2 stops15h 25mAer Lingus

Wed 5/147:30 amFCO - STL

2 stops21h 22mAer Lingus

Deal found 4/23

$1,002

Tue 7/222:18 pmSTL - FCO

2 stops14h 27mKLM

Wed 7/306:30 amFCO - STL

2 stops14h 46mKLM

Deal found 4/23

$1,089

Wed 5/2110:36 amSTL - FCO

2 stops24h 24mFinnair

Wed 5/2811:05 amFCO - STL

1 stop17h 47mFinnair

Deal found 4/22

$1,120

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

Sat 4/268:00 amSTL - FCO

2 stops18h 20mTurkish Airlines

Mon 4/287:55 pmFCO - STL

2 stops25h 47mTurkish Airlines

Deal found 4/22

$1,632

Tue 4/2912:00 pmSTL - FCO

1 stop14h 10mIberia

Sat 5/1011:05 amFCO - STL

1 stop17h 47mIberia

Deal found 4/23

$7,356

Wed 4/3012:00 pmSTL - FCO

2 stops15h 25mAer Lingus

Wed 5/147:30 amFCO - STL

2 stops21h 22mAer Lingus

Deal found 4/23

$1,002

Wed 4/309:39 amSTL - FCO

1 stop15h 16mUnited Airlines

Wed 5/1412:25 pmFCO - STL

2 stops30h 54mUnited Airlines

Deal found 4/22

$1,609

Thu 5/11:30 pmSTL - FCO

1 stop12h 45mAir Canada

Tue 5/611:30 amFCO - STL

2 stops31h 49mAir Canada

Deal found 4/23

$1,658

Thu 5/11:00 pmSTL - FCO

2 stops16h 30mLufthansa

Thu 5/1511:00 amFCO - STL

1 stop19h 46mLufthansa

Deal found 4/23

$2,728

Sat 5/31:30 pmSTL - FCO

1 stop12h 45mMultiple Airlines

Sat 5/109:40 amFCO - STL

2 stops17h 18mMultiple Airlines

Deal found 4/22

$1,705

Mon 5/56:00 amSTL - FCO

1 stop18h 35mDelta

Tue 5/1310:10 amFCO - STL

2 stops20h 16mDelta

Deal found 4/22

$818

Mon 5/51:10 pmSTL - FCO

2 stops15h 25mLufthansa

Thu 5/157:10 amFCO - STL

2 stops15h 37mLufthansa

Deal found 4/21

$852

Mon 5/54:45 pmSTL - FCO

1 stop36h 35mMultiple Airlines

Mon 5/122:30 pmFCO - STL

1 stop29h 06mMultiple Airlines

Deal found 4/21

$859

Mon 5/512:51 pmSTL - FCO

2 stops22h 54mScandinavian Airlines

Tue 5/137:35 pmFCO - STL

2 stops35h 03mScandinavian Airlines

Deal found 4/22

$937

Mon 5/121:30 pmSTL - FCO

1 stop12h 45mUnited Airlines

Tue 5/2011:30 amFCO - STL

2 stops36h 53mUnited Airlines

Deal found 4/23

$787

One-way flights from St. Louis to Leonardo da Vinci/Fiumicino
Search for one-way flight options from St. Louis to Leonardo da Vinci/Fiumicino. Find affordable one-way fares based on user searches. Data last updated April 24, 2025.

Fri 5/95:55 pmSTL - FCO

2 stops58h 55mMultiple Airlines

Deal found 4/23

$416

Tue 5/610:31 amSTL - FCO

2 stops16h 54mAer Lingus

Deal found 4/22

$546

Mon 6/301:30 pmSTL - FCO

1 stop12h 45mUnited Airlines

Deal found 4/21

$603

Sun 6/291:30 pmSTL - FCO

2 stops37h 45mAir Canada

Deal found 4/22

$610

Fri 5/92:15 pmSTL - FCO

1 stop12h 05mKLM

Deal found 4/23

$661

Fri 5/97:05 amSTL - FCO

1 stop17h 30mDelta

Deal found 4/22

$668

Sat 5/39:52 amSTL - FCO

1 stop16h 18mIberia

Deal found 4/22

$734

Tue 6/107:20 amSTL - FCO

2 stops19h 30mBritish Airways

Deal found 4/23

$740

Thu 7/38:15 amSTL - FCO

1 stop17h 00mLufthansa

Deal found 4/23

$2,116

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 5/12

1:30 pm-9:15 am

1 stop12h 45m

Rome Fiumicino

Tue 5/20

11:30 am-5:23 pm

2 stops36h 53m

$787

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 5/12

10:31 am-9:10 am

1 stop15h 39m

Rome Fiumicino

Tue 5/20

11:05 am-9:52 pm

1 stop17h 47m

$798

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 5/12

7:30 am-9:15 am

2 stops18h 45m

Rome Fiumicino

Tue 5/20

9:55 am-7:58 pm

2 stops17h 03m

$810

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 5/5

6:00 am-7:35 am

1 stop18h 35m

Rome Fiumicino

Tue 5/13

10:10 am-11:26 pm

2 stops20h 16m

$818

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 5/12

6:00 am-9:10 am

1 stop20h 10m

Rome Fiumicino

Mon 5/19

8:30 pm-4:22 pm

2 stops26h 52m

$841

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 5/5

1:10 pm-11:35 am

2 stops15h 25m

Rome Fiumicino

Thu 5/15

7:10 am-3:47 pm

2 stops15h 37m

$852

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 5/5

4:45 pm-12:20 pm

1 stop36h 35m

Rome Fiumicino

Mon 5/12

2:30 pm-12:36 pm

1 stop29h 06m

$859

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 5/5

12:51 pm-6:45 pm

2 stops22h 54m

Rome Fiumicino

Tue 5/13

7:35 pm-11:38 pm

2 stops35h 03m

$937

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 4/30

12:00 pm-10:25 am

2 stops15h 25m

Rome Fiumicino

Wed 5/14

7:30 am-9:52 pm

2 stops21h 22m

$1,002

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 7/22

2:18 pm-11:45 am

2 stops14h 27m

Rome Fiumicino

Wed 7/30

6:30 am-2:16 pm

2 stops14h 46m

$1,089

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 19 results

Compare providers for flights from St. Louis to Leonardo da Vinci/Fiumicino

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Leonardo da Vinci/Fiumicino in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Trip.com	Price Accuracy1 star	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 St. Louis-Rome Fiumicino Airport flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on St. Louis-Rome Fiumicino Airport flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from St. Louis-Rome Fiumicino Airport flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Rome Fiumicino Airport 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 St. Louis-Rome Fiumicino Airport 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 St. Louis to Leonardo da Vinci/Fiumicino

Have a flexible travel schedule? Discover the best time to fly to Leonardo da Vinci/Fiumicino from St. Louis 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 St. Louis to Rome Fiumicino Airport

How far ahead should I book a flight from St. Louis to Rome Fiumicino Airport?

To ensure you get the cheapest price possible for a flight from St. Louis to Rome Fiumicino Airport, you should look to book at least 86 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from St. Louis to Rome Fiumicino Airport (average of $644). Flying from St. Louis to Rome Fiumicino Airport in June is currently the most expensive (average of $1,208). 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 time of day to fly from STL to FCO?

It’s optimal to fly from St. Louis to Rome Fiumicino Airport in the afternoon. By choosing this option you can save up to 7% on the cost of your flight, compared to a flight in the morning.

Rainfall in Leonardo da Vinci/Fiumicino by month

In terms of precipitation, rainfall in Rome Fiumicino Airport ranges from 0.6 - 4.4 inches per month. November is typically the wettest month, when rainfall can reach 4.4 in. June is typically the driest time to visit Rome Fiumicino Airport when rainfall is around 0.6 in.

Temperature in Leonardo da Vinci/Fiumicino by month

If weather is an important factor for your trip to Rome Fiumicino Airport, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 46.4 F).

Reviews of airlines servicing Leonardo da Vinci/Fiumicino

Peruse reviews from past customers who have flown with Delta, KLM and Finnair from St. Louis to Rome to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,333 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,272 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Scandinavian Airlines

7.3

Good

1,344 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What airport do you fly from for flights from St. Louis to Rome Fiumicino?
Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Rome Fiumicino. You should not have trouble finding flights to Rome Fiumicino from Lambert-St Louis; the airport handles an average of 0 outbound flights to Rome Fiumicino per day. You should also have plenty of airline options to choose from since 8 airlines have flights from the St. Louis airport to Rome Fiumicino. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.
What are the cheapest airlines flying from St. Louis to Rome Fiumicino Airport round-trip?
Our cheapest airline available from St. Louis to Rome Fiumicino Airport is United Airlines. Our recent data shows that you can find tickets from as low as $787 on this airline. Additional options worth looking into are Iberia and Air Canada, starting at $798 and $810 round-trip. United Airlines is priced at 25% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from St. Louis to Rome Fiumicino Airport one-way?
To fly one-way, consider booking your trip with Aer Lingus, which is currently one of the cheapest options available, starting at $546. United Airlines flights start at $603 while deals on Air Canada start at $610 one-way.
Can I find deals for flights from St. Louis to Leonardo da Vinci/Fiumicino that include hotel bookings?
Yes. In addition to deals on St. Louis to Leonardo da Vinci/Fiumicino flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Leonardo da Vinci/Fiumicino?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Leonardo da Vinci/Fiumicino.
Can I find deals for business class flights from St. Louis to Leonardo da Vinci/Fiumicino?
Yes. Cheapflights offers flight deals from St. Louis to Leonardo da Vinci/Fiumicino 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 St. Louis to Rome Fiumicino Airport?
Currently, January is the cheapest month in which you can book a flight from St. Louis to Rome Fiumicino Airport (average of $644). Flying from St. Louis to Rome Fiumicino Airport in June is currently the most expensive (average of $1,208). 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

Fiumicino

Gaeta

Ciampino

Montepulciano

Ponza

Browse thousands of different options on Cheapflights for your next trip

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Top 8 airlines flying from St. Louis to Leonardo da Vinci/Fiumicino

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$670	Average$951	FlexibilityNo cancel fee	On-timeN/A
Lufthansa	Cheapest$675	Average$960	FlexibilityNo cancel fee	On-time76%
Iberia	Cheapest$681	Average$1,060	FlexibilityNo cancel fee	On-time77%
United Airlines	Cheapest$699	Average$1,205	FlexibilityNo cancel fee	On-time69%
Air Canada	Cheapest$705	Average$1,099	FlexibilityNo cancel fee	On-time67%
British Airways	Cheapest$708	Average$1,065	FlexibilityNo cancel fee	On-time70%
KLM	Cheapest$800	Average$1,098	FlexibilityNo cancel fee	On-time75%
American Airlines	Cheapest$836	Average$1,114	FlexibilityNo cancel fee	On-time71%

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$416+ Cheap flights from St. Louis (STL) to Fiumicino (FCO)

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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Lambert-St Louis to Rome Fiumicino are usually found in January or February, booked 86 days in advance, depart on a Tuesday or Monday and return on a Tuesday

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Cheapest flights from St. Louis to Leonardo da Vinci/FiumicinoExplore the most affordable flight options available from St. Louis to Leonardo da Vinci/Fiumicino. 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 St. Louis to Leonardo da Vinci/Fiumicino. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.

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Compare providers for flights from St. Louis to Leonardo da Vinci/Fiumicino

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 St. Louis to Leonardo da Vinci/Fiumicino in April.

Best time to book a flight from St. Louis to Leonardo da Vinci/Fiumicino

Have a flexible travel schedule? Discover the best time to fly to Leonardo da Vinci/Fiumicino from St. Louis with our price prediction graph.

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Everything you need to know about your flight from St. Louis to Rome Fiumicino Airport

How far ahead should I book a flight from St. Louis to Rome Fiumicino Airport?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Leonardo da Vinci/Fiumicino. Price data was last updated on April 18, 2025.

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

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

Find hourly flight availability from St. Louis to Leonardo da Vinci/Fiumicino. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 24, 2025.

Rainfall in Leonardo da Vinci/Fiumicino by month

Plan your trip to Leonardo da Vinci/Fiumicino by taking into account the average rainfall totals by month.

Temperature in Leonardo da Vinci/Fiumicino by month

Plan your trip to Leonardo da Vinci/Fiumicino by taking into account the average temperature totals by month.

Reviews of airlines servicing Leonardo da Vinci/Fiumicino

Peruse reviews from past customers who have flown with Delta, KLM and Finnair from St. Louis to Rome to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Leonardo da Vinci/Fiumicino. 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 from for flights from St. Louis to Rome Fiumicino?

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

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Can I find deals for flights from St. Louis to Leonardo da Vinci/Fiumicino that include hotel bookings?

How can I find direct flights from St. Louis to Leonardo da Vinci/Fiumicino?

Can I find deals for business class flights from St. Louis to Leonardo da Vinci/Fiumicino?

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

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Alternative routes for St. Louis to Leonardo da Vinci/Fiumicino

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Top 8 airlines flying from St. Louis to Leonardo da Vinci/Fiumicino

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Cheapest flights from St. Louis to Leonardo da Vinci/Fiumicino
Explore the most affordable flight options available from St. Louis to Leonardo da Vinci/Fiumicino. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.