No...actually, there will be 2 of us traveling.
Here's the breakdown:
Travel by car: 680 miles * 0.555 = $377.40
Travel by plane: ~4 hours equaling $360 or so
Company has oked travel by general aviation as acceptable, provided I only reimburse the mileage as if I had driven, and don't reimburse fuel costs. Additionally, provided it is flown by a "Competent and legal" pilot (myself included), life insurance benefits are valid as well.
For both of us traveling, we are both conducting the same business at the destination, so there is a common purpose for the travel.