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TNN to STL: distance & flight time
Tainan (Tainan Airport) → St. Louis (St Louis Lambert International Airport)
7,737 mi
12,451 km · 6,723 nm
15h 38m
estimated nonstop flight time
-14h
time difference · heading northeast
See live TNN→STL fares Phone-only fares on this route — call free
Flight time details
7,737 miles nonstop takes roughly 15h 38m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time set-back when reading arrival times on your ticket.
The two airports
- TNN — Tainan Airport · Tainan, Taiwan
- STL — St Louis Lambert International Airport · St. Louis, 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 TNN
- PIF · Pingtung North Airport25 mi away
- KHH · Kaohsiung International Airport27 mi away
- CYI · Chiayi Airport37 mi away
- WOT · Wang-an Airport53 mi away
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
Frequently asked questions
How far is TNN from STL?
The flight distance from Tainan (TNN) to St. Louis (STL) is 7,737 miles (12,451 km, 6,723 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TNN to STL?
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.
Are there nonstop flights from TNN to STL?
Nonstop service on TNN–STL 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 15h 38m nonstop estimate.
What is the time difference between Tainan and St. Louis?
St. Louis is 14 hours behind Tainan.
What is the cheapest way to fly from TNN to STL?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TNN–STL that never appear on search engines, with no booking fees.
Why are some TNN to STL fares phone-only?
Consolidator contracts let us sell certain TNN–STL 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.