Three airplanes are leaving contrails in the sky
 several planes are flying through the air
Blue sky is covered with clouds
White smoke trail is behind the plane 
4 airplanes performing tricks in the air
2 airplanes travelling in the same direction
Clouds are covering up the blue skies
four planes in the sky
a plane with a long jet stream
a jet stream in the air
a group of soaring planes
planes doing tricks in the sky
numerous jets flying in the sky
hazy white clouds in the sky
a formation of jets flying through a cloudy sky