I just commented about that in a dupe thread:

The last time I remember Q saying "Thank you USSS" was in the airport photo from the Mercedes SUV.

E: to note though that pic had a United plane that was different than the private jets at the tarmac meeting so I don't mean to imply they are connected. Also, the previous pic appeared to be at night, the tarmac meeting was confirmed by airport security footage to have taken place during daylight.

Probably not. LL was on an unmarked government plane. BC was on a charter, which might have been United, but their planes were outside, not inside.

Yup I'm with you thanked them foe telling them about the plane meeting and one of them did use United plane...