I took the Helicopter to the West Rim flying over Hoover Dam, it’s a long flight, you wear a headset that gives audio of the trip and allows you chat freely, there was a picnic included and about 90 minutes at the Canyon itself, a long day.
Not sure how you would land in a fixed wing, if you could get over your fixed wing preference then it’s worth it as in my opinion you need to get boots on the ground at the canyon.
More impressive is the South Rim, about 4.5 - 5 hours there, same return, we left at 6.45 and were back at 6.45 pm having stayed 3 hours at the rim and stopped many times for food, coffee and pictures, I would drive to the South Rim and forget about the West Rim, it’s incredible and there is a visitor center, the drive is very easy don’t let the distance put you off, it’s an adventure after all.