Need help booking?
Unpublished phone-only deals available
WBU to SIG: distance & flight time
Boulder (Boulder Municipal Airport) → San Juan (Fernando Luis Ribas Dominicci Airport)
2,758 mi
4,438 km · 2,396 nm
5h 52m
estimated nonstop flight time
+2h
time difference · heading east
See live WBU→SIG fares Phone-only fares on this route — call free
Flight time details
2,758 miles nonstop takes roughly 5h 52m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time gain when reading arrival times on your ticket.
The two airports
- WBU — Boulder Municipal Airport · Boulder, United States
- SIG — Fernando Luis Ribas Dominicci Airport · San Juan, Puerto Rico
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 SIG
- SJU · Luis Munoz Marin International Airport6 mi away
- FAJ · Diego Jimenez Torres Airport30 mi away
- NRR · José Aponte de la Torre Airport33 mi away
- ARE · Antonio Nery Juarbe Pol Airport38 mi away
Frequently asked questions
How far is WBU from SIG?
The flight distance from Boulder (WBU) to San Juan (SIG) is 2,758 miles (4,438 km, 2,396 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from WBU to SIG?
A nonstop flight takes about 5h 52m 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 San Juan?
San Juan is 2 hours ahead of Boulder.
What is the cheapest way to fly from WBU to SIG?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on WBU–SIG that never appear on search engines, with no booking fees.