Yes, you do earn airline frequent flyer miles on flights booked through the Chase Travel Portal, but whether you earn Chase Ultimate Rewards points depends on how you pay. When you book a flight using your Chase Sapphire Preferred or Reserve card, you earn "multiplier" points (e.g., 5x points on travel) just as you would with a direct booking. Because the airline treats these as "revenue" tickets rather than "award" tickets, you can still enter your frequent flyer number (e.g., Delta SkyMiles or United MileagePlus) and earn miles for the distance flown. However, if you pay for the flight using Chase points (Pay with Points), you will earn airline miles on the flight, but you will not earn new Chase points on that specific transaction. It is a "best of both worlds" scenario for many travelers in 2026, as it allows them to use their flexible Chase points to "buy" a ticket while still progressing toward elite status with their preferred airline, a benefit that typically does not apply when booking traditional "award seats" directly through an airline.