Ultimately, because it doesn't make economic sense for them to fly there. The airport is dominated by Delta (for which it's a major hub) for passenger travel, and is also the busiest cargo airport in the world due to serving as a hub for FedEx.
southwest
Yes they do.
American Airlines United Airlines Southwest Airlines
The southwest
Southwest does not fly to Miami. The closest airport that Southwest serves is Ft Lauderdale.
Southwest Airlines Flies out / into Terminal 3
No.
No
yes
Nope. Only the southwest of the US.
Yes Southwest Airlines flies to Seattle.
There are many popular airlines that fly to and from the Isle of Man airport. Some of the more famous airlines that fly to and from there are United Airlines and Southwest Airlines.