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SPF to SAY: distance & flight time
Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field) → Siena (Siena-Ampugnano Airport)
5,176 mi
8,330 km · 4,498 nm
10h 37m
estimated nonstop flight time
+8h
time difference · heading northeast
See live SPF→SAY fares Phone-only fares on this route — call free
Flight time details
5,176 miles nonstop takes roughly 10h 37m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time gain when reading arrival times on your ticket.
The two airports
- SPF — Black Hills Airport-Clyde Ice Field · Spearfish-South Dakota, United States
- SAY — Siena-Ampugnano Airport · Siena, Italy
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 SAY
- GRS · Grosseto Air Base36 mi away
- FLR · Peretola Airport38 mi away
- PSA · Pisa International Airport52 mi away
- EBA · Marina Di Campo Airport62 mi away
Frequently asked questions
How far is SPF from SAY?
The flight distance from Spearfish-South Dakota (SPF) to Siena (SAY) is 5,176 miles (8,330 km, 4,498 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SPF to SAY?
A nonstop flight takes about 10h 37m 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 Siena?
Siena is 8 hours ahead of Spearfish-South Dakota.
What is the cheapest way to fly from SPF to SAY?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SPF–SAY that never appear on search engines, with no booking fees.