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GRS to WBU: distance & flight time
Grosseto (Grosseto Air Base) → Boulder (Boulder Municipal Airport)
5,471 mi
8,804 km · 4,754 nm
11h 12m
estimated nonstop flight time
-8h
time difference · heading northwest
See live GRS→WBU fares Phone-only fares on this route — call free
Flight time details
5,471 miles nonstop takes roughly 11h 12m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time set-back when reading arrival times on your ticket.
The two airports
- GRS — Grosseto Air Base · Grosseto, Italy
- 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 GRS
- SAY · Siena-Ampugnano Airport36 mi away
- EBA · Marina Di Campo Airport42 mi away
- FCO · Leonardo da Vinci–Fiumicino Airport89 mi away
- PSA · Pisa International Airport72 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 GRS from WBU?
The flight distance from Grosseto (GRS) to Boulder (WBU) is 5,471 miles (8,804 km, 4,754 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GRS to WBU?
A nonstop flight takes about 11h 12m 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 Grosseto and Boulder?
Boulder is 8 hours behind Grosseto.
What is the cheapest way to fly from GRS to WBU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GRS–WBU that never appear on search engines, with no booking fees.