Need help booking?
Unpublished phone-only deals available
STL to KOS: distance & flight time
St. Louis (St Louis Lambert International Airport) → Sihanoukville (Sihanoukville International Airport)
8,911 mi
14,341 km · 7,743 nm
17h 56m
estimated nonstop flight time
+12h
time difference · heading north
See live STL→KOS fares Phone-only fares on this route — call free
Flight time details
8,911 miles nonstop takes roughly 17h 56m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time gain when reading arrival times on your ticket.
The two airports
- STL — St Louis Lambert International Airport · St. Louis, United States
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
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 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
Frequently asked questions
How far is STL from KOS?
The flight distance from St. Louis (STL) to Sihanoukville (KOS) is 8,911 miles (14,341 km, 7,743 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from STL to KOS?
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 time difference between St. Louis and Sihanoukville?
Sihanoukville is 12 hours ahead of St. Louis.
What is the cheapest way to fly from STL to KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on STL–KOS that never appear on search engines, with no booking fees.