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Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CAT–SEM that never appear on search engines, with no booking fees.