Your next trip, last seen at €420
Lowest observedRyanair · 3 stops · One wayWhen to fly
Explore datesMore dates worth a look
Find the dates that work for you
The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €420, departing 18 Nov 2026 (Last checked: 19 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 77Check live prices for this route
- Airlines seen
- Air France, Alaska Airlines, easyJet, Frontier Airlines, Iberia, ITA Airways, KLM, Lufthansa, Neos, Norse, Royal Air Maroc, Ryanair, TAP Air Portugal, Turkish Airlines, United Airlines, Wizz Air Malta (16)
- Typical journey time
- 28h 47m
About this route
Explore the fares we observed from Rome to St Louis. Prices move often, so pick your dates to see the latest options.
- Route distance
- 8,140 km
- Typical journey time
- 28h 47m
- Airlines seen
- Air France, Alaska Airlines, easyJet, Frontier Airlines, Iberia, ITA Airways, KLM, Lufthansa, Neos, Norse, Royal Air Maroc, Ryanair, TAP Air Portugal, Turkish Airlines, United Airlines, Wizz Air Malta (16)
- Seen on fares with a connection
- Ryanair, KLM, TAP Air Portugal, ITA Airways, Air France, Frontier Airlines, Turkish Airlines, easyJet, Wizz Air Malta, Neos, United Airlines, Royal Air Maroc, Lufthansa (13)
- Alternative airports
- CIA, SUS
Route-level information; individual journeys vary.
We have not observed non-stop service on this route; the fares shown include at least one stop.
A clearer picture of your fare
Airport to city: straight-line distance
- Rome Ciampino (CIA) → Rome, city gazetteer reference point (41.8905, 12.4942): ≈ 13 km.
- Rome Fiumicino (FCO) → Rome, city gazetteer reference point (41.8905, 12.4942): ≈ 23 km.
- St. Louis Lambert International Airport (STL) → St Louis, city gazetteer reference point (38.6270, -90.1994): ≈ 20 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by departure month
Cheapest month from Rome to St Louis: November 2026, from €420 (checked 19 Oct 2026).
| Month | Lowest fare | Priced days |
|---|---|---|
| October 2026 | €683 | 11 |
| November 2026 | €420 | 27 |
| December 2026 | €704 | 23 |
| January 2027 | €425 | 16 |
Lowest fare by day of the week
Cheapest day of the week from Rome to St Louis: Wednesday, from €420 (checked 19 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €458 | 10 |
| Tuesday | €425 | 13 |
| Wednesday | €420 | 9 |
| Thursday | €492 | 13 |
| Friday | €470 | 11 |
| Saturday | €434 | 8 |
| Sunday | €498 | 13 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Lowest fare by days before departure
Lowest fare from Rome to St Louis by days until departure (8 to 30 days): €420 (checked 19 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €718 | 7 |
| 8 to 30 days | €420 | 23 |
| 31 to 60 days | €434 | 20 |
| 61 days or more | €425 | 27 |
One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.
Fares for different departure dates, checked now; not a guide to when to book.
Lowest one-way fare we saw per airline
Cheapest airline from Rome to St Louis: Ryanair, from €420 (checked 19 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Ryanair | €420Nov 18, 2026 | 14 |
| easyJet | €434Nov 21, 2026 | 4 |
| Frontier Airlines | €458Nov 16, 2026 | 5 |
| TAP Air Portugal | €493Jan 13, 2027 | 9 |
| Wizz Air Malta | €498Nov 22, 2026 | 4 |
| Turkish Airlines | €674Nov 3, 2026 | 5 |
| KLM | €704Dec 8, 2026 | 10 |
| Air France | €707Dec 10, 2026 | 6 |
| United Airlines | €1,020Jan 10, 2027 | 3 |
| Neos | €1,021Dec 3, 2026 | 3 |
| ITA Airways | €1,166Jan 8, 2027 | 7 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from Rome to St Louis?
The lowest fare we have observed is €420, found on 19 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Rome to St Louis?
Cheapest month from Rome to St Louis: November 2026, from €420 (checked 19 Oct 2026).
Are there direct flights from Rome to St Louis?
Our data holds no non-stop flight from Rome to St Louis. The fares on this page include at least one stop.
Which airlines fly from Rome to St Louis?
These are the carriers we have seen on the route: Air France, Alaska Airlines, easyJet, Frontier Airlines, Iberia, ITA Airways, KLM, Lufthansa, Neos, Norse, Royal Air Maroc, Ryanair, TAP Air Portugal, Turkish Airlines, United Airlines, Wizz Air Malta (16).
How long does the flight from Rome to St Louis take?
The average journey time across the 77 fares we observed is 35h 07m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Rome to St Louis fares were non-stop?
None of the 77 fares we observed was non-stop; every one included at least one stop. That describes our observations, not every flight that operates.
Which day of the week is cheapest from Rome to St Louis?
Cheapest day of the week from Rome to St Louis: Wednesday, from €420 (checked 19 Oct 2026).
Which airline has the lowest fare from Rome to St Louis?
Cheapest airline from Rome to St Louis: Ryanair, from €420 (checked 19 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
Keep exploring
Similar routes
More routes from Rome
Show all 30 routes →Show fewer ↑
More routes to St Louis
Show all 30 routes →Show fewer ↑
Recently observed fares. Prices may change.
Last checked: 19 Oct 2026