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YEC to SPF: distance & flight time
Yechon (Yecheon Airbase) → Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field)
5,955 mi
9,583 km · 5,174 nm
12h 9m
estimated nonstop flight time
-15h
time difference · heading northeast
See live YEC→SPF fares Phone-only fares on this route — call free
Flight time details
5,955 miles nonstop takes roughly 12h 9m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time set-back when reading arrival times on your ticket.
The two airports
- YEC — Yecheon Airbase · Yechon, South Korea
- SPF — Black Hills Airport-Clyde Ice Field · Spearfish-South Dakota, 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 YEC
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
Frequently asked questions
How far is YEC from SPF?
The flight distance from Yechon (YEC) to Spearfish-South Dakota (SPF) is 5,955 miles (9,583 km, 5,174 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YEC to SPF?
A nonstop flight takes about 12h 9m 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 Yechon and Spearfish-South Dakota?
Spearfish-South Dakota is 15 hours behind Yechon.
What is the cheapest way to fly from YEC to SPF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YEC–SPF that never appear on search engines, with no booking fees.