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KOS to ALN: distance & flight time
Sihanoukville (Sihanoukville International Airport) → Alton/St Louis (St Louis Regional Airport)
8,907 mi
14,334 km · 7,740 nm
17h 56m
estimated nonstop flight time
—
time difference · heading north
See live KOS→ALN fares Phone-only fares on this route — call free
Flight time details
8,907 miles nonstop takes roughly 17h 56m 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
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
- ALN — St Louis Regional Airport · Alton/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 KOS
- PQC · Phu Quoc International Airport37 mi away
- PNH · Phnom Penh International Airport106 mi away
- VKG · Rach Gia Airport110 mi away
- KZC · Kampong Chhnang Airport132 mi away
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
Frequently asked questions
How far is KOS from ALN?
The flight distance from Sihanoukville (KOS) to Alton/St Louis (ALN) is 8,907 miles (14,334 km, 7,740 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KOS to ALN?
A nonstop flight takes about 17h 56m 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 KOS to ALN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOS–ALN that never appear on search engines, with no booking fees.