On: Airlines are running out of 4-digit flight numbers

[skissane]

They price two itineraries - one with the work part only, the other with both work and personal. They book the combined itinerary and then you reimburse them the differnce

[RexM → skissane]

Yep, I’ve done something similar. Flew to a conference for work, then had them fly me to my vacation destination instead of home.

I basically ended up getting a free one-way flight for vacation.