Answer:
I believe it would be " El avion vuela por dos horas" or " El avion va a volar por dos horas" it depends on what tense you have to answer in.
Explanation
Its saying " the plane is flying for two hours
Past tense= El avion volo por dos horas
Present tense= El avion vuela por dos horas---- El avion va a volar por dos horas.
I would really love it if you could please attach a picture of the question to this. it would really help me help you
