If you're wondering how to upgrade a British Airways flight there are several options available depending on your ticket type and availability. You can upgrade at the time of booking, after booking via “Manage My Booking” on the British Airways website, during online check-in, or at the airport. Upgrades are available from Economy to Premium Economy, Premium Economy to Business Class, and Business to First Class. You can pay for the upgrade using cash, Avios points, or a combination of both. Avios upgrades are often a great value for Executive Club members. Keep in mind that discounted or basic fares may not be eligible for upgrades. Checking upgrade availability early and frequently gives you the best chance to secure a better travel experience with added comfort and benefits.