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WBU to SOF: distance & flight time
Boulder (Boulder Municipal Airport) → Sofia (Sofia Airport)
5,882 mi
9,466 km · 5,111 nm
12h
estimated nonstop flight time
+9h
time difference · heading northeast
See live WBU→SOF fares Phone-only fares on this route — call free
Flight time details
5,882 miles nonstop takes roughly 12h gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time gain when reading arrival times on your ticket.
The two airports
- WBU — Boulder Municipal Airport · Boulder, United States
- SOF — Sofia Airport · Sofia, Bulgaria
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 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
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
Frequently asked questions
How far is WBU from SOF?
The flight distance from Boulder (WBU) to Sofia (SOF) 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 WBU to SOF?
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 Boulder and Sofia?
Sofia is 9 hours ahead of Boulder.
What is the cheapest way to fly from WBU to SOF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on WBU–SOF that never appear on search engines, with no booking fees.