For your air travel, you might want to consider compression stockings with a moderate amount of compression. They make them now with zippers, so they are much easier to put on. Google "compression stockings with zippers." You can get knee-high or thigh-high. While they will probably not be absolutely necessary, my thinking is this: we know the healing is still going on @ 6 months; people on this site still report swelling at 6 months; swelling is not our friend and can impede our activities. Wearing a pair of compression stockings just on the plane could make the difference between leaping off the plane fresh as a daisy or limping off and needing ice.
If you decide to go without, make sure you get up and walk during the flight--pretend you have to go to the bathroom, even if you don't need to!