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KOI to ACI: distance & flight time
Kirkwall (Kirkwall Airport) → Alderney (Alderney Airport)
640 mi
1,030 km · 556 nm
1h 51m
estimated nonstop flight time
Same time
time difference · heading south
See live KOI→ACI fares Phone-only fares on this route — call free
Flight time details
640 miles nonstop takes roughly 1h 51m gate to gate, flying south. 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
- KOI — Kirkwall Airport · Kirkwall, United Kingdom
- ACI — Alderney Airport · Alderney, Guernsey
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 KOI
- EOI · Eday Airport17 mi away
- SOY · Stronsay Airport17 mi away
- NDY · Sanday Airport23 mi away
- PPW · Papa Westray Airport27 mi away
Near ACI
- GCI · Guernsey Airport26 mi away
- JER · Jersey Airport34 mi away
- CER · Cherbourg-Maupertus Airport34 mi away
- GFR · Granville Airport64 mi away
Frequently asked questions
How far is KOI from ACI?
The flight distance from Kirkwall (KOI) to Alderney (ACI) is 640 miles (1,030 km, 556 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KOI to ACI?
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.
Are there nonstop flights from KOI to ACI?
Nonstop service on KOI–ACI 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 1h 51m nonstop estimate.
What is the cheapest way to fly from KOI to ACI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOI–ACI that never appear on search engines, with no booking fees.
Why are some KOI to ACI fares phone-only?
Consolidator contracts let us sell certain KOI–ACI 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.