Spoilers - Distance to Qo'Nos (Kronos), a math question

We don't know how long the trip took. Of course, the Romulan Neutral Zone is pretty close to Earth since the war occured early during space exploration. Maybe Starfleet parked the Enterprise close by just in case.

 

Even if it's hours, that's still not much time considering in the past it's taken days to reach both. But again I see this stuff as minor because traveling through space at faster than light speeds is itself impossible and if you somehow could do so you would be traveling through time.

 

That was then.