Re: 1st class flights
Indeed, I've used the same tactic. Open jaw flights and a Saturday reduced the cost to the company and ended up with me having road trips to/from the sales kick off location, mostly via Yosemite and Death Valley, or on one occasion, Vegas -> Zion -> Moab -> Denver through the Rockies. 1100 miles in 4ish days in a convertible Mustang, paid for by not having to pay for flights.
One year, the company mandated out Sunday back Thursday for everyone in Europe. Hence the doubling or more of the flights bill. Next year there was a more relaxed attitude and as long as you were at SKO for the right days and it was cheaper for the firm, not a problem.