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SPF to ONT: distance & flight time
Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field) → Ontario (Ontario International Airport)
1,029 mi
1,657 km · 894 nm
2h 42m
estimated nonstop flight time
-1h
time difference · heading southwest
See live SPF→ONT fares Phone-only fares on this route — call free
Flight time details
1,029 miles nonstop takes roughly 2h 42m gate to gate, flying southwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- SPF — Black Hills Airport-Clyde Ice Field · Spearfish-South Dakota, United States
- ONT — Ontario International Airport · Ontario, 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 SPF
- RCA · Ellsworth Air Force Base41 mi away
- RAP · Rapid City Regional Airport47 mi away
- GCC · Gillette Campbell County Airport87 mi away
- CDR · Chadron Municipal Airport119 mi away
Near ONT
- CCB · Cable Airport6 mi away
- CNO · Chino Airport6 mi away
- LAX · Los Angeles International Airport47 mi away
- RAL · Riverside Municipal Airport11 mi away
Frequently asked questions
How far is SPF from ONT?
The flight distance from Spearfish-South Dakota (SPF) to Ontario (ONT) is 1,029 miles (1,657 km, 894 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SPF to ONT?
A nonstop flight takes about 2h 42m 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 Spearfish-South Dakota and Ontario?
Ontario is 1 hour behind Spearfish-South Dakota.
What is the cheapest way to fly from SPF to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SPF–ONT that never appear on search engines, with no booking fees.