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HDN to SDY: distance & flight time
Hayden (Yampa Valley Airport) → Sidney (Sidney - Richland Regional Airport)
521 mi
839 km · 453 nm
1h 36m
estimated nonstop flight time
Same time
time difference · heading north
See live HDN→SDY fares Phone-only fares on this route — call free
Flight time details
521 miles nonstop takes roughly 1h 36m gate to gate, flying north. 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
- HDN — Yampa Valley Airport · Hayden, United States
- 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 HDN
- SBS · Steamboat Springs Bob Adams Field19 mi away
- EGE · Eagle County Regional Airport60 mi away
- SAA · Shively Field70 mi away
- RIL · Garfield County Regional Airport71 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 HDN from SDY?
The flight distance from Hayden (HDN) to Sidney (SDY) is 521 miles (839 km, 453 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from HDN to SDY?
A nonstop flight takes about 1h 36m 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 HDN to SDY?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on HDN–SDY that never appear on search engines, with no booking fees.