There are no good travel portals. If you need to change anything or if there are any issues, going through a portal is alway a pain compared to booking directl

There are no good travel portals. If you need to change anything or if there are any issues, going through a portal is alway a pain compared to booking directly. Amex in particular for domestic flights have Delta and JetBlue as a partner. You get much better value by transferring to one of those two than booking through a portal. You will only get 1 cent per point by using the portal. You can routinely get 1.2 - 1.5 cents per point for Skymiles