Need help booking?
Unpublished phone-only deals available
CAT to WBU: distance & flight time
Cascais (Cascais Airport) → Boulder (Boulder Municipal Airport)
4,839 mi
7,788 km · 4,205 nm
9h 57m
estimated nonstop flight time
-7h
time difference · heading northwest
See live CAT→WBU fares Phone-only fares on this route — call free
Flight time details
4,839 miles nonstop takes roughly 9h 57m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-hour time set-back when reading arrival times on your ticket.
The two airports
- CAT — Cascais Airport · Cascais, Portugal
- WBU — Boulder Municipal Airport · Boulder, 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 WBU
- DEN · Denver International Airport32 mi away
- BJC · Rocky Mountain Metropolitan Airport11 mi away
- FNL · Northern Colorado Regional Airport31 mi away
- BFK · Buckley Air Force Base34 mi away
Frequently asked questions
How far is CAT from WBU?
The flight distance from Cascais (CAT) to Boulder (WBU) is 4,839 miles (7,788 km, 4,205 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CAT to WBU?
A nonstop flight takes about 9h 57m 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 Boulder?
Boulder is 7 hours behind Cascais.
What is the cheapest way to fly from CAT to WBU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CAT–WBU that never appear on search engines, with no booking fees.