Honestly, do it for delivery , tip 0 so no driver takes it right away (buys you some time) and then open a chat window immediately telling the guy you have a flight leaving soon or something and have it switched to pickup. I just did that with the old 'ENTREE15' code that was only good for delivery and picked it up 30 mins after I ordered. Mind you, I actually had a flight to catch 2.5 hours after my order.