Amen to that.
Recently my wife had to travel to a training seminar in Omaha. Her employer bought her ticket and rented a car for her at the going rate for business passengers.
I figured the distance (300 miles) and estimated that with the extra time spent waiting in airports, transferring flights, waiting for luggage, and picking up the rental, she would arrive 1/2 hour earlier AT BEST when compared to driving her own car. Throw in a delay due to weather, mechanical trouble, or a random strip-search and she actually would arrive later!
With this in mind, I had her offer to drive her own car at HALF the total cost to her company, a handsome profit for us and a saving to her employer. Not SOP, they replied. She flies or doesn't go at all.
Of course there were problems, there always seem to be when you fly nowadays. She got home grouchy and beat, 23 hours after boarding the plane to come home. Mechanical trouble kept her waiting most of the night until her connecting flight was cancelled in the wee hours. After waiting some more for her luggage, she dragged herself to a hotel at 2 a.m. to get some sleep before trekking back to the airport at 6 a.m. for the next scheduled flight (I also lost most of a night's sleep, since I was to pick her up at the airport and the flight wasn't cancelled until 1 a.m.).
She has to go back to Omaha next week, but she WON'T be flying this time.