It does, if I don’t take some precautions. Compression sleeve on the affected side is a must for me. Also if I don’t get up and walk to the back of the cabin every half an hour, or at least stand up and stretch and walk in place my feet might swell. I wear a light compression sock since that isn’t lymphadema exactly but my feet will sometimes swell on those long flights. The added benefit is that it cuts your risk for a blood clot.
Frankly, I hate flying, it always leaves me feeling physically crappy, but it is occasionally a necessary evil. Especially when I love the results of the in person meetings and visiting someplace that is unfamiliar and getting to see new places.
Since you are far enough out from treatment, with some forethought, I can’t see why you shouldn’t. Have you reached out to your medical team about the swelling in your feet and the lymphadema after your last adventure?
I am dying to know where you want to go and take pictures, have you thought about trying to lighten your load by carrying a lighter camera?