Has anyone else noticed this too? See below.

I'm a flight attendant and I often don't have a lot of time to eat when I'm on duty, so that leaves fast food options as one of my primary forms of sustenance, unfortunately. I've noticed that Burger King and Wendy's have aggressively tried to corner the fast food burger market at many, if not most major airports... but the number one fast food chain in the USA, McDonald's, seems to only have a perfunctory presence at certain key airports, while often not having any at all, even at some of the busiest airports in the country!

Does anyone know why this is?

Or at least venture a guess? I've wondered this for years now why airport Burger Kings always seem to outnumber McD's even though obviously McDonald's outlets do outnumber any other fast food establishment many times over nationwide.

Here's an informal survey I've taken (mostly from experience and memory, so I'm not going to make any guarantees that it is 100% accurate - any feedback from your experience is appreciated):

Out of the 50 or so of the busiest airports in the US, the following (I'm pretty sure) do not have any McDonald's locations at all.

SEA
LAS
SLC
CLT
PHX
MCI
AUS
PDX
MIA
IAD
STL
BNA
SFO
HNL
OAK
RDU
TPA
SMF
MEM
CLE
MKE
RSW
HOU
SJC
CMH
MSY
FLL

That's 27 (over half!) of some of the busiest airports in America, with no McDonald's! Seems almost un-American, doesn't it?

So that leaves the following airports that i've confirmed DO have at least one McD's on premesis:

MSP
DEN
LAX
ORD
ATL (concourse E only)
SNA
IND
DFW
SAN
BWI
CVG
LGA (US Airways Terminal only)
EWR (Terminal C only)
JFK (Terminals 1, 4, 7 & 8)
PIT
IAH
BOS (Terminal B only)
SAT
MCO
DTW
PHL
DCA