Need help booking?
Unpublished phone-only deals available
STL to ATY: distance & flight time
St. Louis (St Louis Lambert International Airport) → Watertown (Watertown Regional Airport)
550 mi
886 km · 478 nm
1h 40m
estimated nonstop flight time
Same time
time difference · heading northwest
See live STL→ATY fares Phone-only fares on this route — call free
Flight time details
550 miles nonstop takes roughly 1h 40m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- STL — St Louis Lambert International Airport · St. Louis, United States
- ATY — Watertown Regional Airport · Watertown, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near STL
- SUS · Spirit of St Louis Airport16 mi away
- ALN · St Louis Regional Airport20 mi away
- BLV · Scott AFB/Midamerica Airport32 mi away
- SPI · Abraham Lincoln Capital Airport84 mi away
Near ATY
- HON · Huron Regional Airport64 mi away
- ABR · Aberdeen Regional Airport72 mi away
- MHE · Mitchell Municipal Airport90 mi away
- FSD · Joe Foss Field Airport94 mi away
Frequently asked questions
How far is STL from ATY?
The flight distance from St. Louis (STL) to Watertown (ATY) is 550 miles (886 km, 478 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from STL to ATY?
A nonstop flight takes about 1h 40m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from STL to ATY?
Nonstop service on STL–ATY depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 1h 40m nonstop estimate.
What is the cheapest way to fly from STL to ATY?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on STL–ATY that never appear on search engines, with no booking fees.
Why are some STL to ATY fares phone-only?
Consolidator contracts let us sell certain STL–ATY tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.