Southwest rolled out their winter schedule today, through March 11th or so. (FYI, when I detail specific flight times and thru flights, I checked early March.)


Milwaukee

--MKE-PHX increases from 1x to 2x
This has by far been their fullest route overall at 1x, although it's interesting that both directions the departures are close together...12:35pm and 2:20pm westbound, and 12:50pm and 2:15pm eastbound.

--MKE-MCI decreases from 3x to 2x.
Westbound 7:00am and 7:05pm, eastbound 9:05am and 7:45pm. Well-timed for business, although it's interesting that with Frontier's schedule decreasing to 4x this winter, Southwest still chose to trim back their offering to 2x.

--Other nonstop markets
All other nonstop markets remain at current levels, including MKE-BWI at 3x. BWI and MCI were the weakest performers last winter, but only MCI is being trimmed.

--Thru flights
No thru flights to RSW this year, although two 1-stops to FLL (1 one-stop return)
DAL, SAN and LAX each have two 1-stop flights both directions

Kansas City

--MCI-SEA discontinued
They did this last winter as well, although last year they immediately stated MCI-SEA would return in spring. I have not specifically seen that spelled out this year, although it would not be a surprise to see it come back.

--Thru flights
MCI-BWI is being reduced from 3x to 2x/day, and the only morning MCI-BWI flight which does not require a change of planes is a 9:05am MCI-MKE-BWI trip.

Denver

Southwest is adding one additional flight each to Los Angeles, Las Vegas, Phoenix, and Reno. Compared to some previous new rollouts, that's a relatively small change in DEN. Obviously January-March is not the busiest period to pile on new flights, although Denver does benefit from ski season.