In February Air France, KLM, Brussels Airlines, Philippine Airlines and World Atlantic joined PreCheck, bringing the total number of participating airlines to 47 and joining these carriers:
TSA itself still only lists these 47 airlines.
Update: the website now shows Air Serbia, Condor, Porter, Scandinavian, and Thomas Cook Airlines as well. British Airways will launch in the coming days.
Notably though that’s not a help at New York JFK where terminal 7 doesn’t currently have PreCheck. Hopefully British Airways passengers with PreCheck will be afforded expedited screening.
Make Sure You Get the Benefits of PreCheck When You Fly
You’ll want to make sure all participating airlines have your Known Traveler Number. Currently-booked tickets aren’t going to have your number in the booking. Don’t expect your known traveler number to pass through from a US frequent flyer program to international airline partner automatically either. So if you use Alaska miles to book on British Airways you want to confirm with BA that they have the number in your reservation.
Most people update their frequent flyer accounts with their Known Traveler number, but if you’re flying without one or using another airline’s frequent flyer program, it won’t go in automatically either. So make sure each reservation gets the number.
When you check-in for a flight make sure your boarding pass indicates PreCheck. If it doesn’t check your Known Traveler number in the reservation and check in again. If your airline doesn’t support that, call and get ‘unchecked in’ and re-check in for an updated boarding pass.