$399 Cheap Flights from St. Louis (STL) to Rome (FCO)

View $399 flight on Sat, Feb 21, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Fiumicino - Leonardo da Vinci Intl. Airport (FCO)

Cheap Flights from St. Louis to Rome (STL-FCO)

Prices were available within the past 7 days and start at $399 for one-way flights and $483 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Fri, Dec 5 - Fri, Dec 12
STL
St. Louis
FCO
Rome
$483 Roundtrip, found 6 hours ago
$483
Roundtrip
found 6 hours ago
Select Air Canada flight, departing Fri, Dec 5 from St. Louis to Rome, returning Fri, Dec 12, priced at $483 found 6 hours ago
Air Canada
Thu, Nov 27 - Fri, Dec 5
STL
St. Louis
FCO
Rome
$485 Roundtrip, found 4 hours ago
$485
Roundtrip
found 4 hours ago
Select Air Canada flight, departing Thu, Nov 27 from St. Louis to Rome, returning Fri, Dec 5, priced at $485 found 4 hours ago
Lufthansa
Mon, Dec 8 - Wed, Dec 24
STL
St. Louis
FCO
Rome
$490 Roundtrip, found 2 hours ago
$490
Roundtrip
found 2 hours ago
Select Lufthansa flight, departing Mon, Dec 8 from St. Louis to Rome, returning Wed, Dec 24, priced at $490 found 2 hours ago
Air Canada
Wed, Dec 31 - Wed, Jan 21
STL
St. Louis
FCO
Rome
$493 Roundtrip, found 8 hours ago
$493
Roundtrip
found 8 hours ago
Select Air Canada flight, departing Wed, Dec 31 from St. Louis to Rome, returning Wed, Jan 21, priced at $493 found 8 hours ago
Air Canada
Mon, Dec 8 - Wed, Dec 24
STL
St. Louis
FCO
Rome
$494 Roundtrip, found 2 hours ago
$494
Roundtrip
found 2 hours ago
Select Air Canada flight, departing Mon, Dec 8 from St. Louis to Rome, returning Wed, Dec 24, priced at $494 found 2 hours ago
Air Canada
Sat, Jan 17 - Sun, Jan 25
STL
St. Louis
FCO
Rome
$495 Roundtrip, found 10 hours ago
$495
Roundtrip
found 10 hours ago
Select Air Canada flight, departing Sat, Jan 17 from St. Louis to Rome, returning Sun, Jan 25, priced at $495 found 10 hours ago
Lufthansa
Mon, Dec 8 - Wed, Dec 24
STL
St. Louis
FCO
Rome
$499 Roundtrip, found 2 hours ago
$499
Roundtrip
found 2 hours ago
Select Lufthansa flight, departing Mon, Dec 8 from St. Louis to Rome, returning Wed, Dec 24, priced at $499 found 2 hours ago
United
Thu, Feb 5 - Thu, Feb 12
STL
St. Louis
FCO
Rome
$503 Roundtrip, found 8 hours ago
$503
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Feb 5 from St. Louis to Rome, returning Thu, Feb 12, priced at $503 found 8 hours ago
British Airways
Fri, Nov 28 - Sat, Dec 6
STL
St. Louis
FCO
Rome
$504 Roundtrip, found 4 hours ago
$504
Roundtrip
found 4 hours ago
Select British Airways flight, departing Fri, Nov 28 from St. Louis to Rome, returning Sat, Dec 6, priced at $504 found 4 hours ago
Delta
Mon, Jan 26 - Fri, Feb 6
STL
St. Louis
FCO
Rome
$506 Roundtrip, found 14 hours ago
$506
Roundtrip
found 14 hours ago
Select Delta flight, departing Mon, Jan 26 from St. Louis to Rome, returning Fri, Feb 6, priced at $506 found 14 hours ago

Find the cheapest month to fly from St. Louis (STL) to Rome (FCO)

November is typically the cheapest month to fly

From $505 - $1,467 per traveler.

Alternative airports near Rome

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Fiumicino - Leonardo da Vinci Intl. FCO. Cheapest option available. Average driving time to city center is 26 minutes. Flights from $703
FCO
Fiumicino - Leonardo da Vinci Intl.
Cheapest
Average driving time to city center26 min
Flights from $703

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Fiumicino - Leonardo da Vinci Intl. Airport (FCO) cost?
Snag a cheap one-way flight from $399 or cheap return flight from $483 from Lambert-St. Louis Intl. Airport (STL) to Fiumicino - Leonardo da Vinci Intl. Airport (FCO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Fiumicino - Leonardo da Vinci Intl. Airport (FCO)?
The cheapest month to fly from STL to FCO is December, when there's less demand. Off-peak months are typically when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Fiumicino - Leonardo da Vinci Intl. Airport (FCO)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest STL to FCO flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Fiumicino - Leonardo da Vinci Intl. Airport (FCO)?
Direct flights from Lambert-St. Louis Intl. Airport (STL) to Fiumicino - Leonardo da Vinci Intl. Airport (FCO) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to FCO?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can change depending on various factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Fiumicino - Leonardo da Vinci Intl. Airport (FCO)?
Choose a flight from Lambert-St. Louis Intl. Airport (STL) to Fiumicino - Leonardo da Vinci Intl. Airport (FCO) that takes off before 3 PM to reduce the risk of cancellations and delays. Later departures have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Fiumicino - Leonardo da Vinci Intl. Airport (FCO) last-minute?
Booking your ticket from STL to FCO shortly before your journey is usually more expensive. However, if you're flexible with your departure times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a STL to FCO flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to FCO flight and hotel package with Expedia could lead to significant savings. What's more, managing everything in one place takes the hassle out of travel planning. Simply pick your flights and select from our wide range of hotels, then tailor your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Fiumicino - Leonardo da Vinci Intl. Airport (FCO)?
Typically, you're able to cancel or reschedule your STL to FCO flight. However, there may be additional charges, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you'd like more information, visit our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Fiumicino - Leonardo da Vinci Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, KLM, Lufthansa, Scandinavian Airlines, Turkish Airlines, United
Roundtrip price
$483
Distance
5053 mi

Book with confidence

St. Louis to Rome Flights

The cheapest times to fly from St. Louis to Rome

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Rome are during the month of December. You can find some of the cheapest flights from St. Louis to Rome with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Rome

Sunday is one of the best days to book for cheap flights from St. Louis to Rome: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Rome

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Rome in 2025. You can also book with separate airlines for your outbound and return journeys, from $399 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Rome flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Rome airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Rome Flights

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*Available to One Key members.