Not common, but it does happen.
In the case of Cancun, it really isn't surprising. For a while, CUN
was the goose laying golden eggs for the airlines.
So everyone wanted to fly there, from everywhere, and it (almost) killed the goose.
didn't work, nor did MKE
. There were a number of Frontier flights AUS
that went out with less than a dozen people on them.
I could never work out why so many airlines wanted MCO
(one resort to another) and in the case of ORD
, I would guess Spirit has seen the writing on the wall.
) to CUN
is a contested route - more applications that authority available.
The DOT always takes their sweet time with contested applications - the decision on STL
took about eight months.
The competition is tough - United wants ORD
(as does USA 3000) and Frontier wants MDW
, which they're already flying as a charter.
So I would guess - just a guess - that Spirit decided to take their ball and go play somewhere else.