Originally Posted by
EJRofChicago
Flying Icelandair next month, two segments on separate reservations as part of a return from Europe to my home in Washington DC, and wish to credit to Alaska Mileage Plan. But struggling to find where I add my Mileage Plan number in the booking. Booking was made several months ago, for context. Thanks for any advice!
Retrieve your booking on the FI website. To the right of the price paid there is a down arrow; click to expand your reservation details. Scroll down to the "Passengers" section; below the passenger name on the right side of the screen there is an option to "edit contact information" where you will find the option to add or edit your frequent flyer info as well as APIS and known traveler number for TSA Precheck (if departing from the USA).
Please note this worked by accessing the website from the desktop; I haven't tried this from the FI app or mobile version of the website.