Need help booking?
Unpublished phone-only deals available
ACI to SDY: distance & flight time
Alderney (Alderney Airport) → Sidney (Sidney - Richland Regional Airport)
4,264 mi
6,862 km · 3,705 nm
8h 50m
estimated nonstop flight time
-7h
time difference · heading northwest
See live ACI→SDY fares Phone-only fares on this route — call free
Flight time details
4,264 miles nonstop takes roughly 8h 50m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-hour time set-back when reading arrival times on your ticket.
The two airports
- ACI — Alderney Airport · Alderney, Guernsey
- SDY — Sidney - Richland Regional Airport · Sidney, United States
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 ACI
- GCI · Guernsey Airport26 mi away
- JER · Jersey Airport34 mi away
- CER · Cherbourg-Maupertus Airport34 mi away
- GFR · Granville Airport64 mi away
Near SDY
- ISN · Sloulin Field International Airport41 mi away
- GDV · Dawson Community Airport49 mi away
- OLF · L M Clayton Airport69 mi away
- DIK · Dickinson Theodore Roosevelt Regional Airport91 mi away
Frequently asked questions
How far is ACI from SDY?
The flight distance from Alderney (ACI) to Sidney (SDY) is 4,264 miles (6,862 km, 3,705 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ACI to SDY?
A nonstop flight takes about 8h 50m 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 Alderney and Sidney?
Sidney is 7 hours behind Alderney.
What is the cheapest way to fly from ACI to SDY?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ACI–SDY that never appear on search engines, with no booking fees.