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SPF to CAT: distance & flight time
Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field) → Cascais (Cascais Airport)
4,609 mi
7,418 km · 4,005 nm
9h 30m
estimated nonstop flight time
+7h
time difference · heading northeast
See live SPF→CAT fares Phone-only fares on this route — call free
Flight time details
4,609 miles nonstop takes roughly 9h 30m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-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
- CAT — Cascais Airport · Cascais, Portugal
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 CAT
- LIS · Humberto Delgado Airport (Lisbon Portela Airport)12 mi away
- AVR · Alverca Air Base21 mi away
- QLR · Monte Real Air Base80 mi away
- BYJ · Beja Airport / Airbase89 mi away
Frequently asked questions
How far is SPF from CAT?
The flight distance from Spearfish-South Dakota (SPF) to Cascais (CAT) is 4,609 miles (7,418 km, 4,005 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SPF to CAT?
A nonstop flight takes about 9h 30m 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 Cascais?
Cascais is 7 hours ahead of Spearfish-South Dakota.
What is the cheapest way to fly from SPF to CAT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SPF–CAT that never appear on search engines, with no booking fees.