My husband travels weekly/fortnightly with work and can be away from 3 - 6 days depending on whether he has gone to Darwin, Perth, or more easily accessible Melbourne etc.

We have an agreement of no travel after 36 weeks, or other risky stuff like his love of dirt motorbike riding with his mates ....

Agree it depends on where he is actually going and how long it would take him to get back - and if it was for leisure i'd be telling him no way if work purposes, I think that time is ok - but only if he could get back fairly quickly if need be.