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ALN to UTH: distance & flight time
Alton/St Louis (St Louis Regional Airport) → Udon Thani (Udon Thani Airport)
8,461 mi
13,616 km · 7,352 nm
17h 3m
estimated nonstop flight time
—
time difference · heading north
See live ALN→UTH fares Phone-only fares on this route — call free
Flight time details
8,461 miles nonstop takes roughly 17h 3m gate to gate, flying north. 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
- UTH — Udon Thani Airport · Udon Thani, Thailand
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 UTH
- VTE · Wattay International Airport44 mi away
- KKC · Khon Kaen Airport64 mi away
- LOE · Loei Airport70 mi away
- SNO · Sakon Nakhon Airport89 mi away
Frequently asked questions
How far is ALN from UTH?
The flight distance from Alton/St Louis (ALN) to Udon Thani (UTH) is 8,461 miles (13,616 km, 7,352 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ALN to UTH?
A nonstop flight takes about 17h 3m 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 ALN to UTH?
Nonstop service on ALN–UTH 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 17h 3m nonstop estimate.
What is the cheapest way to fly from ALN to UTH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ALN–UTH that never appear on search engines, with no booking fees.
Why are some ALN to UTH fares phone-only?
Consolidator contracts let us sell certain ALN–UTH 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.