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SIR to DCA: distance & flight time
Sion (Sion Airport) → Washington (Ronald Reagan Washington National Airport)
4,119 mi
6,629 km · 3,579 nm
8h 33m
estimated nonstop flight time
-6h
time difference · heading northwest
See live SIR→DCA fares Phone-only fares on this route — call free
Flight time details
4,119 miles nonstop takes roughly 8h 33m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time set-back when reading arrival times on your ticket.
The two airports
- SIR — Sion Airport · Sion, Switzerland
- DCA — Ronald Reagan Washington National Airport · Washington, 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 SIR
- AOT · Aosta Airport33 mi away
- QLS · Lausanne-Blécherette Airport41 mi away
- ZIN · Interlaken Air Base41 mi away
- MVV · Megève Airport43 mi away
Near DCA
Frequently asked questions
How far is SIR from DCA?
The flight distance from Sion (SIR) to Washington (DCA) is 4,119 miles (6,629 km, 3,579 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SIR to DCA?
A nonstop flight takes about 8h 33m 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 Sion and Washington?
Washington is 6 hours behind Sion.
What is the cheapest way to fly from SIR to DCA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SIR–DCA that never appear on search engines, with no booking fees.