$347 Find Cheap Flights from Rome to St. Louis

In the last 3 days, the lowest price for a flight from Rome Fiumicino Airport to St. Louis was $347 for a one-way ticket and $789 for a round-trip.

Yes, you'll most likely have to show a valid passport before boarding the plane in Rome and on arrival in St. Louis.

Rome and St. Louis are both served by 1 main airport. You will leave Rome from Rome Fiumicino and will be arriving at Lambert-St Louis.

We unfortunately don’t have that data for this specific route.

oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Rome and St. Louis, with Star Alliance being the most commonly used for this route.

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Rome to St. Louis.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Rome is likely to change within 7 days, so travelers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Rome with another airline. Booking your flights between Rome and STL can sometimes prove cheaper using this method.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Rome up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.