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KOS to SIN: distance & flight time
Sihanoukville (Sihanoukville International Airport) → Singapore (Singapore Changi Airport)
638 mi
1,027 km · 555 nm
1h 51m
estimated nonstop flight time
+1h
time difference · heading south
See live KOS→SIN fares Phone-only fares on this route — call free
Flight time details
638 miles nonstop takes roughly 1h 51m gate to gate, flying south. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
- SIN — Singapore Changi Airport · Singapore, Singapore
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 SIN
- QPG · Paya Lebar Air Base6 mi away
- XSP · Seletar Airport10 mi away
- BTH · Hang Nadim International Airport18 mi away
- TGA · Tengah Air Base20 mi away
Frequently asked questions
How far is KOS from SIN?
The flight distance from Sihanoukville (KOS) to Singapore (SIN) is 638 miles (1,027 km, 555 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KOS to SIN?
A nonstop flight takes about 1h 51m 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 Sihanoukville and Singapore?
Singapore is 1 hour ahead of Sihanoukville.
What is the cheapest way to fly from KOS to SIN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOS–SIN that never appear on search engines, with no booking fees.