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USM to CAT: distance & flight time
Ko Samui (Samui Airport) → Cascais (Cascais Airport)
6,822 mi
10,980 km · 5,929 nm
13h 51m
estimated nonstop flight time
-6h
time difference · heading northwest
See live USM→CAT fares Phone-only fares on this route — call free
Flight time details
6,822 miles nonstop takes roughly 13h 51m gate to gate, flying northwest. 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
- USM — Samui Airport · Ko Samui, Thailand
- 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 USM
- URT · Surat Thani Airport69 mi away
- NST · Nakhon Si Thammarat Airport70 mi away
- CJM · Chumphon Airport93 mi away
- UNN · Ranong Airport102 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 USM from CAT?
The flight distance from Ko Samui (USM) to Cascais (CAT) is 6,822 miles (10,980 km, 5,929 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from USM to CAT?
A nonstop flight takes about 13h 51m 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 Ko Samui and Cascais?
Cascais is 6 hours behind Ko Samui.
What is the cheapest way to fly from USM to CAT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on USM–CAT that never appear on search engines, with no booking fees.