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KSJ to WBU: distance & flight time

Kasos (Kasos Airport) → Boulder (Boulder Municipal Airport)

6,399 mi
10,299 km · 5,561 nm
13h 1m
estimated nonstop flight time
-9h
time difference · heading northwest
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Flight time details

6,399 miles nonstop takes roughly 13h 1m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time set-back when reading arrival times on your ticket.

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The two airports

Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.

Alternate airports can cut this fare

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Frequently asked questions

How far is KSJ from WBU?

The flight distance from Kasos (KSJ) to Boulder (WBU) is 6,399 miles (10,299 km, 5,561 nautical miles), measured along the great-circle route airlines actually fly.

How long is the flight from KSJ to WBU?

A nonstop flight takes about 13h 1m 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 Kasos and Boulder?

Boulder is 9 hours behind Kasos.

What is the cheapest way to fly from KSJ to WBU?

Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KSJ–WBU that never appear on search engines, with no booking fees.
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