Hi, I Had ORIF Surgery On A Tibial Plateau Fracture

Hi, I had ORIF surgery on a tibial plateau fracture about 6 weeks ago. I still have considerable stiffness and some swelling in the knee joint, movement is currently limited to about 55-60 degrees. I’m due to fly in a week so will be 7 weeks post op. Will I be able to? I’ve booked extra leg room seats but am concerned that it will be uncomfortable for the knee to be sat in that position for an hour.
Thanks!