a cloudy blue sky
four airplanes in the sky
four airplanes flying high
four airplanes high in the air
four airplanes flying in the air
four airplanes flying high in the air
four airplanes leaving a smoke trail
4 planes in the skies
blue skies with light clouds
planes in the skies
The sky is blue with wispy clouds.
airplanes flying in formation in a blue sky with trails