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BOI to SDY: distance & flight time
Boise (Boise Air Terminal/Gowen Field) → Sidney (Sidney - Richland Regional Airport)
647 mi
1,041 km · 562 nm
1h 52m
estimated nonstop flight time
Same time
time difference · heading northeast
See live BOI→SDY fares Phone-only fares on this route — call free
Flight time details
647 miles nonstop takes roughly 1h 52m gate to gate, flying northeast. 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
- BOI — Boise Air Terminal/Gowen Field · Boise, 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 BOI
- MUO · Mountain Home Air Force Base40 mi away
- ONO · Ontario Municipal Airport50 mi away
- MYL · McCall Municipal Airport92 mi away
- SUN · Friedman Memorial Airport97 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 BOI from SDY?
The flight distance from Boise (BOI) to Sidney (SDY) is 647 miles (1,041 km, 562 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BOI to SDY?
A nonstop flight takes about 1h 52m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from BOI to SDY?
Nonstop service on BOI–SDY depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 1h 52m nonstop estimate.
What is the cheapest way to fly from BOI to SDY?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BOI–SDY that never appear on search engines, with no booking fees.
Why are some BOI to SDY fares phone-only?
Consolidator contracts let us sell certain BOI–SDY tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.