Topplegeist

Flying
When Topplegeist enters, tap target creature an opponent controls.
Delirium — At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, tap target creature that player controls.

Loyal Pegasus

Flying
Loyal Pegasus can't attack or block alone.

Sephara, Sky's Blade

You may pay {W} and tap four untapped creatures you control with flying rather than pay this spell's mana cost.
Flying, lifelink
Other creatures you control with flying have indestructible. (Damage and effects that say "destroy" don't destroy them.)

Healer's Hawk

Segovian Angel

Ornithopter

Suntail Hawk

Kitesail Cleric

Kicker {2}{W} (You may pay an additional {2}{W} as you cast this spell.)
Flying
When Kitesail Cleric enters, if it was kicked, tap up to two target creatures.

Aven Skirmisher

Rustwing Falcon

Duskborne Skymarcher

Flying
{W}, {T}: Target attacking Vampire gets +1/+1 until end of turn.

Ornithopter of Paradise

Serra Ascendant

Lifelink (Damage dealt by this creature also causes you to gain that much life.)
As long as you have 30 or more life, Serra Ascendant gets +5/+5 and has flying.

Kitesail Scout

Lantern Kami

Battlefield Raptor

Goldenglow Moth

Flying
Whenever Goldenglow Moth blocks, you may gain 4 life.

Brass Gnat

Flying
Brass Gnat doesn't untap during your untap step.
At the beginning of your upkeep, you may pay {1}. If you do, untap Brass Gnat.

Hope of Ghirapur

Flying
Sacrifice Hope of Ghirapur: Until your next turn, target player who was dealt combat damage by Hope of Ghirapur this turn can't cast noncreature spells.

Gift of the Fae

Target creature gets +2/+1 and gains flying until end of turn. (Then exile this card. You may cast the creature later from exile.)