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SIR to OST: distance & flight time
Sion (Sion Airport) → Ostend (Ostend-Bruges International Airport)
400 mi
643 km · 347 nm
1h 31m
estimated nonstop flight time
Same time
time difference · heading northwest
See live SIR→OST fares Phone-only fares on this route — call free
Flight time details
400 miles nonstop takes roughly 1h 31m 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
- SIR — Sion Airport · Sion, Switzerland
- OST — Ostend-Bruges International Airport · Ostend, Belgium
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 SIR
- AOT · Aosta Airport33 mi away
- QLS · Lausanne-Blécherette Airport41 mi away
- ZIN · Interlaken Air Base41 mi away
- MVV · Megève Airport43 mi away
Near OST
- KJK · Wevelgem Airport30 mi away
- HZB · Merville-Calonne Airport41 mi away
- CQF · Calais-Dunkerque Airport43 mi away
- LIL · Lille-Lesquin Airport45 mi away
Frequently asked questions
How far is SIR from OST?
The flight distance from Sion (SIR) to Ostend (OST) is 400 miles (643 km, 347 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SIR to OST?
A nonstop flight takes about 1h 31m 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 cheapest way to fly from SIR to OST?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SIR–OST that never appear on search engines, with no booking fees.