Your next trip, last seen at €221
Lowest observedFrontier Airlines · 2 stops · One wayWhen to fly
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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
- €221, departing 4 Jan 2027 (Last checked: 18 Oct 2026)One-way fareCheck live prices for this route
- Airlines seen
- Air Canada, Frontier Airlines, JetBlue, United Airlines
- Typical journey time
- 18h 22m
About this route
Explore the fares we observed from St Louis to Saint Thomas. Prices move often, so pick your dates to see the latest options.
- Route distance
- 3,323 km
- Typical journey time
- 18h 22m
- Seen on fares with a connection
- Frontier Airlines, United Airlines, JetBlue
- Alternative airports
- 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
- St. Louis Lambert International Airport (STL) → St Louis, city gazetteer reference point (38.6270, -90.1994): ≈ 20 km.
- Cyril E. King Airport (STT) → Saint Thomas, city gazetteer reference point (18.3419, -64.9307): ≈ 5 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 one-way fare we saw per airline
Cheapest airline from St Louis to Saint Thomas: Frontier Airlines, from €221 (checked 18 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Frontier Airlines | €221Jan 4, 2027 | 52 |
| United Airlines | €278Nov 14, 2026 | 24 |
| JetBlue | €298Nov 23, 2026 | 5 |
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 St Louis to Saint Thomas?
The lowest fare Routavio has observed is €221, found on 18 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from St Louis to Saint Thomas?
In our observations January 2027 is the cheapest month so far, at €221.
Are there direct flights from St Louis to Saint Thomas?
Our data holds no non-stop flight from St Louis to Saint Thomas. The fares on this page include at least one stop.
Which airlines fly from St Louis to Saint Thomas?
Routavio has seen these carriers on the route: Air Canada, Frontier Airlines, JetBlue, United Airlines.
How long does the flight from St Louis to Saint Thomas take?
Across the 87 fares Routavio observed, the average journey time is 22h 32m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed St Louis to Saint Thomas fares were non-stop?
None of the 88 fares we observed was non-stop; every one included at least one stop. That describes our observations, not every flight that operates.
Which airline has the lowest fare from St Louis to Saint Thomas?
Cheapest airline from St Louis to Saint Thomas: Frontier Airlines, from €221 (checked 18 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
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Recently observed fares. Prices may change.
Last checked: 25 Oct 2026