Leaving Later

I must have been half asleep when I entered my flight info into Outlook. turns out my flight is at 2:10 PM not 12:10 PM, so I will be able to take the bus from the convention center to the airport. I wound up subtracting two hours from the departure (which was already in San Diego time) and adding two hours to the arrival . So now my eight hour flight is down to four hours! I thought that seemed way too long.