Tips and gotchas when using American Express' travel portal
American Express offers 3 points per dollar when you purchase plane tickets with their Premiere Rewards card. They offer an additional bonus point when you purchase through their online travel portal. As I've previously advised, make sure you comparison shop on Kayak.com and make sure that their prices are competitive before you book. I've found that they're usually more expensive by a few dollars, but I do the math to make sure I'm not overpaying for my extra bonus point. Their site has improved in recent years, but buying through their travel portal is almost always slower and less convenient than booking directly through the airline's own site. For example: It doesn't remember your passport number It doesn't remember any frequent companion information, only yours. It doesn't have a way to enter Known Traveler numbers for Global Entry/TSAPre, so you have to call the airline to add it after you book It doesn't let you enter a partner ...