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SEM to CAT: distance & flight time
Selma (Craig Field) → Cascais (Cascais Airport)
4,255 mi
6,848 km · 3,698 nm
8h 49m
estimated nonstop flight time
+6h
time difference · heading northeast
See live SEM→CAT fares Phone-only fares on this route — call free
Flight time details
4,255 miles nonstop takes roughly 8h 49m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time gain when reading arrival times on your ticket.
The two airports
- SEM — Craig Field · Selma, 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 SEM
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 SEM from CAT?
The flight distance from Selma (SEM) to Cascais (CAT) is 4,255 miles (6,848 km, 3,698 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEM to CAT?
A nonstop flight takes about 8h 49m 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 Selma and Cascais?
Cascais is 6 hours ahead of Selma.
What is the cheapest way to fly from SEM to CAT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEM–CAT that never appear on search engines, with no booking fees.