Need help booking?
Unpublished phone-only deals available
TRS to WBU: distance & flight time
Ronchi De Legionari (Trieste–Friuli Venezia Giulia Airport) → Boulder (Boulder Municipal Airport)
5,400 mi
8,691 km · 4,693 nm
11h 3m
estimated nonstop flight time
-8h
time difference · heading northwest
See live TRS→WBU fares Phone-only fares on this route — call free
Flight time details
5,400 miles nonstop takes roughly 11h 3m 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
- TRS — Trieste–Friuli Venezia Giulia Airport · Ronchi De Legionari, 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 TRS
- POW · Portoroz Airport25 mi away
- AVB · Aviano Air Base44 mi away
- LJU · Ljubljana Jože Pučnik Airport55 mi away
- VCE · Venice Marco Polo Airport58 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 TRS from WBU?
The flight distance from Ronchi De Legionari (TRS) to Boulder (WBU) is 5,400 miles (8,691 km, 4,693 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TRS to WBU?
A nonstop flight takes about 11h 3m 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 Ronchi De Legionari and Boulder?
Boulder is 8 hours behind Ronchi De Legionari.
What is the cheapest way to fly from TRS to WBU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TRS–WBU that never appear on search engines, with no booking fees.