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OKO to SIR: distance & flight time
Yokota (Yokota Air Base) → Sion (Sion Airport)
6,037 mi
9,715 km · 5,246 nm
12h 18m
estimated nonstop flight time
-7h
time difference · heading northwest
See live OKO→SIR fares Phone-only fares on this route — call free
Flight time details
6,037 miles nonstop takes roughly 12h 18m 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
- OKO — Yokota Air Base · Yokota, Japan
- SIR — Sion Airport · Sion, Switzerland
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 OKO
- HND · Tokyo Haneda International Airport28 mi away
- NRT · Narita International Airport58 mi away
- NJA · Atsugi Naval Air Facility21 mi away
- IBR · Hyakuri Airport67 mi away
Near SIR
- AOT · Aosta Airport33 mi away
- QLS · Lausanne-Blécherette Airport41 mi away
- ZIN · Interlaken Air Base41 mi away
- MVV · Megève Airport43 mi away
Frequently asked questions
How far is OKO from SIR?
The flight distance from Yokota (OKO) to Sion (SIR) is 6,037 miles (9,715 km, 5,246 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OKO to SIR?
A nonstop flight takes about 12h 18m 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 Yokota and Sion?
Sion is 7 hours behind Yokota.
What is the cheapest way to fly from OKO to SIR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OKO–SIR that never appear on search engines, with no booking fees.