Need help booking?
Unpublished phone-only deals available
SOF to WBU: distance & flight time
Sofia (Sofia Airport) → Boulder (Boulder Municipal Airport)
5,882 mi
9,466 km · 5,111 nm
12h
estimated nonstop flight time
-9h
time difference · heading northwest
See live SOF→WBU fares Phone-only fares on this route — call free
Flight time details
5,882 miles nonstop takes roughly 12h 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.
The two airports
- SOF — Sofia Airport · Sofia, Bulgaria
- 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 SOF
- PDV · Plovdiv International Airport85 mi away
- INI · Nis Airport90 mi away
- SKP · Skopje Alexander the Great Airport105 mi away
- CRA · Craiova Airport115 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 SOF from WBU?
The flight distance from Sofia (SOF) to Boulder (WBU) is 5,882 miles (9,466 km, 5,111 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SOF to WBU?
A nonstop flight takes about 12h 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 Sofia and Boulder?
Boulder is 9 hours behind Sofia.
What is the cheapest way to fly from SOF to WBU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SOF–WBU that never appear on search engines, with no booking fees.