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KOS to ISB: distance & flight time
Sihanoukville (Sihanoukville International Airport) → Islamabad (New Islamabad International Airport)
2,513 mi
4,044 km · 2,184 nm
5h 24m
estimated nonstop flight time
—
time difference · heading northwest
See live KOS→ISB fares Phone-only fares on this route — call free
Flight time details
2,513 miles nonstop takes roughly 5h 24m gate to gate, flying northwest. 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
- ISB — New Islamabad International Airport · Islamabad, Pakistan
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 ISB
- ATG · Minhas Air Base34 mi away
- XJM · Mangla Airport58 mi away
- RAZ · Rawalakot Airport58 mi away
- MFG · Muzaffarabad Airport66 mi away
Frequently asked questions
How far is KOS from ISB?
The flight distance from Sihanoukville (KOS) to Islamabad (ISB) is 2,513 miles (4,044 km, 2,184 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KOS to ISB?
A nonstop flight takes about 5h 24m 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 KOS to ISB?
Nonstop service on KOS–ISB 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 5h 24m nonstop estimate.
What is the cheapest way to fly from KOS to ISB?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOS–ISB that never appear on search engines, with no booking fees.
Why are some KOS to ISB fares phone-only?
Consolidator contracts let us sell certain KOS–ISB 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.