No, it's never stated how long the trip took. We need to make a flow chart for this question. How long did they go into stasis in Krysis? 1. Only a few weeks or months, maybe a year or two tops 2. A normal stasis time of at least a few decades 1. Then why did they go into stasis given the trip was so short? 2. Then Kochanski is dead or elderly now unless she's in stasis too, why would Lister do that? Frankly I think any stasis-trip is dangerous from Lister's point of view. What if they bump into Kochanski while they're in stasis. Some people would say it would have been better to use the Time-Drive.