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BOI to CAT: distance & flight time
Boise (Boise Air Terminal/Gowen Field) → Cascais (Cascais Airport)
5,148 mi
8,285 km · 4,474 nm
10h 34m
estimated nonstop flight time
+7h
time difference · heading northeast
See live BOI→CAT fares Phone-only fares on this route — call free
Flight time details
5,148 miles nonstop takes roughly 10h 34m 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
- BOI — Boise Air Terminal/Gowen Field · Boise, 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 BOI
- MUO · Mountain Home Air Force Base40 mi away
- ONO · Ontario Municipal Airport50 mi away
- MYL · McCall Municipal Airport92 mi away
- SUN · Friedman Memorial Airport97 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 BOI from CAT?
The flight distance from Boise (BOI) to Cascais (CAT) is 5,148 miles (8,285 km, 4,474 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BOI to CAT?
A nonstop flight takes about 10h 34m 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 Boise and Cascais?
Cascais is 7 hours ahead of Boise.
What is the cheapest way to fly from BOI to CAT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BOI–CAT that never appear on search engines, with no booking fees.