Need help booking?
Unpublished phone-only deals available
NXX to SIR: distance & flight time
Willow Grove (Willow Grove Naval Air Station/Joint Reserve Base) → Sion (Sion Airport)
3,983 mi
6,409 km · 3,461 nm
8h 17m
estimated nonstop flight time
+6h
time difference · heading northeast
See live NXX→SIR fares Phone-only fares on this route — call free
Flight time details
3,983 miles nonstop takes roughly 8h 17m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time gain when reading arrival times on your ticket.
The two airports
- NXX — Willow Grove Naval Air Station/Joint Reserve Base · Willow Grove, United States
- 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 NXX
- PHL · Philadelphia International Airport23 mi away
- BBX · Wings Field8 mi away
- DYL · Doylestown Airport9 mi away
- PNE · Northeast Philadelphia Airport11 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 NXX from SIR?
The flight distance from Willow Grove (NXX) to Sion (SIR) is 3,983 miles (6,409 km, 3,461 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from NXX to SIR?
A nonstop flight takes about 8h 17m 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 Willow Grove and Sion?
Sion is 6 hours ahead of Willow Grove.
What is the cheapest way to fly from NXX to SIR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on NXX–SIR that never appear on search engines, with no booking fees.