Click the “Change flight” button next to the flight that you would like to edit the number of tickets for. Once you click “Change flight” you will see an edit button that resembles a pen and paper, on the top banner of the flight results page.
Once you click the edit button, an “Edit Search” pop-up will open --in the bottom right-hand corner; you will see a drop down menu listed under “Travelers/Class”, from there you can change the number of seats.
Once you have selected the new number of travelers, click “ Search” to see a new list of flights as well as the price per ticket for those flights.
Please note, changing the number of travelers for one city will not change the number of travelers for all cities in a multi-city itinerary.