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ATY to CAT: distance & flight time
Watertown (Watertown Regional Airport) → Cascais (Cascais Airport)
4,313 mi
6,941 km · 3,748 nm
8h 55m
estimated nonstop flight time
+6h
time difference · heading northeast
See live ATY→CAT fares Phone-only fares on this route — call free
Flight time details
4,313 miles nonstop takes roughly 8h 55m 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
- ATY — Watertown Regional Airport · Watertown, 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 ATY
- HON · Huron Regional Airport64 mi away
- ABR · Aberdeen Regional Airport72 mi away
- MHE · Mitchell Municipal Airport90 mi away
- FSD · Joe Foss Field Airport94 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 ATY from CAT?
The flight distance from Watertown (ATY) to Cascais (CAT) is 4,313 miles (6,941 km, 3,748 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ATY to CAT?
A nonstop flight takes about 8h 55m 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 Watertown and Cascais?
Cascais is 6 hours ahead of Watertown.
What is the cheapest way to fly from ATY to CAT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ATY–CAT that never appear on search engines, with no booking fees.