Empyrean Eagle

Flying
Other creatures you control with flying get +1/+1.

Angelic Wall

Defender (This creature can't attack.)
Flying

Apex Hawks

Multikicker {1}{W} (You may pay an additional {1}{W} any number of times as you cast this spell.)
Flying
Apex Hawks enters with a +1/+1 counter on it for each time it was kicked.

Azorius First-Wing

Aerial Assault

Destroy target tapped creature. You gain 1 life for each creature you control with flying.

Angel of the Dawn

Flying
When Angel of the Dawn enters, creatures you control get +1/+1 and gain vigilance until end of turn.

Angelic Curator

Arcane Flight

Enchant creature
Enchanted creature gets +1/+1 and has flying.