united, $477 million southwest doesn t charge change fees if delta were to drop its fees, that could pressure other airlines to follow suit the airline business is a copycat business if one airline is successful with one strategy, other airlines will try the same strategy. reporter: it s still not clear when or if the change is coming, but any airline that adjusts its fee structure will be hoping to attract more loyal customers, many of whom feel nickeled and dimed every time they fly. lester all right, tom, thank you. now to our nbc news investigation into popular dating apps tonight a warning about the highly personal information you might be sharing, and where it could wind up. keir simmons has our exclusive report reporter: tonight an alarming warning from national security officials about the personal information you put on your dating apps if there is an interest to see it, assume that somebody could see it reporter: our investigation begins in europe where transpar
right? reporter: but industry analysts say delta is hinting it could change its change fees, maybe even reduce or drop them. sometimes the change fee costs more than the actual ticket and so it just duptd make any sense whatsoever reporter: it recently discussed fees at an investor conference, but isn t talking about any potential changes yet. ticket change fees earn the airlines big money. in the first nine months of 2019, delta made nearly $615 million in ticket change fees. second only to american, which earned $622 million united, $477 million southwest doesn t charge change fees if delta were to drop its fees, that could pressure other airlines to follow suit the airline business is a copycat business if one airline is successful with one strategy, other airlines will try the same strategy. reporter: it s still not clear when or if the change is coming, but any airline that adjusts its fee structure will be hoping to attract more loyal customers,