If you're using the mobile website on your phone, you won't be able to customize the settings for a trip due to the smaller streamlined page.
However, if you click the link at the bottom to "view full site" or you're using a desktop computer, you can click on any blue item to change it. At the top of each column for FLYING or DRIVING, you'll see a line that says either "Number of travelers" or "Number of passengers". It defaults to "1 person" but you can click that blue text to change it to any number of travelers.
Make sure you're using the "Fly or Drive" tool on a computer for this to work:
|07/27/2014, 12:02 PM||calculating with the number of travelers|
|07/28/2014, 11:56 PM||Re: calculating with the number of travelers|