In Memoriam, FlyerTalk Evangelist
Join Date: Jul 2002
Location: Durham, NC (RDU/GSO/CLT)
Programs: AA EXP/MM, DL GM, UA Platinum, HH DIA, Hyatt Explorist, IHG Platinum, Marriott Titanium, Hertz PC
Posts: 33,856
I'm pretty sure DFW has them and I think they're in Terminal D. Of course I'm sure you could ask the staff at an airline lounge if they'd add your letter to their outgoing mail, they've done it before with my Netflix DVDs.