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SPF to HMY: distance & flight time
Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field) → Seosan (Seosan Air Base)
6,008 mi
9,669 km · 5,221 nm
12h 15m
estimated nonstop flight time
—
time difference · heading northwest
See live SPF→HMY fares Phone-only fares on this route — call free
Flight time details
6,008 miles nonstop takes roughly 12h 15m gate to gate, flying northwest. 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
- SPF — Black Hills Airport-Clyde Ice Field · Spearfish-South Dakota, United States
- HMY — Seosan Air Base · Seosan, South Korea
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 HMY
- ICN · Incheon International Airport53 mi away
- OSN · Osan Air Base40 mi away
- SWU · Suwon Airport47 mi away
- KUV · Kunsan Air Base56 mi away
Frequently asked questions
How far is SPF from HMY?
The flight distance from Spearfish-South Dakota (SPF) to Seosan (HMY) is 6,008 miles (9,669 km, 5,221 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SPF to HMY?
A nonstop flight takes about 12h 15m 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 SPF to HMY?
Nonstop service on SPF–HMY 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 12h 15m nonstop estimate.
What is the cheapest way to fly from SPF to HMY?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SPF–HMY that never appear on search engines, with no booking fees.
Why are some SPF to HMY fares phone-only?
Consolidator contracts let us sell certain SPF–HMY 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.