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ALN to TNN: distance & flight time
Alton/St Louis (St Louis Regional Airport) → Tainan (Tainan Airport)
7,737 mi
12,452 km · 6,723 nm
15h 38m
estimated nonstop flight time
—
time difference · heading northwest
See live ALN→TNN fares Phone-only fares on this route — call free
Flight time details
7,737 miles nonstop takes roughly 15h 38m 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
- ALN — St Louis Regional Airport · Alton/St Louis, United States
- TNN — Tainan Airport · Tainan, Taiwan
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 ALN
- STL · St Louis Lambert International Airport20 mi away
- BLV · Scott AFB/Midamerica Airport26 mi away
- SUS · Spirit of St Louis Airport36 mi away
- SPI · Abraham Lincoln Capital Airport69 mi away
Near TNN
- PIF · Pingtung North Airport25 mi away
- KHH · Kaohsiung International Airport27 mi away
- CYI · Chiayi Airport37 mi away
- WOT · Wang-an Airport53 mi away
Frequently asked questions
How far is ALN from TNN?
The flight distance from Alton/St Louis (ALN) to Tainan (TNN) is 7,737 miles (12,452 km, 6,723 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ALN to TNN?
A nonstop flight takes about 15h 38m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the cheapest way to fly from ALN to TNN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ALN–TNN that never appear on search engines, with no booking fees.