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ALN to REP: distance & flight time
Alton/St Louis (St Louis Regional Airport) → Siem-reap (Siem Reap International Airport)
8,714 mi
14,024 km · 7,572 nm
17h 33m
estimated nonstop flight time
—
time difference · heading north
See live ALN→REP fares Phone-only fares on this route — call free
Flight time details
8,714 miles nonstop takes roughly 17h 33m 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
- REP — Siem Reap International Airport · Siem-reap, 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 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 REP
- BBM · Battambang Airport45 mi away
- KZC · Kampong Chhnang Airport95 mi away
- PXR · Surin Airport103 mi away
- TDX · Trat Airport128 mi away
Frequently asked questions
How far is ALN from REP?
The flight distance from Alton/St Louis (ALN) to Siem-reap (REP) is 8,714 miles (14,024 km, 7,572 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ALN to REP?
A nonstop flight takes about 17h 33m 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 REP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ALN–REP that never appear on search engines, with no booking fees.