You could just take Flyby Attack after angelic wings and save yourself two feats.
Or play a Strix and fly from level one, if your GM allows it.
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Clerics can be powerful martial combatants, but this is maybe not the way to go about it:
* At low level Clerics are mostly martial, but at high levels are ... well ... full spell casters.
* By 11th level you'll be more effective casting spells than attacking in melee. E.g. Why do a Standard Attack when you could, instead, summon a pack of pouncing Dire Tigers to attack for you. Your summons will inflict more damage, absorb more damage, and don't have to be healed when the combat is over.
* I suggest you leave the flying spring attacks to a dedicated martial, or even to your Animal Companion, and instead concentrate on being effective at things you are already good at. E.g. The Lunge feat can be terrific at 9th level: combined with a longspear it can give you an extra attack.
* Clerics are feat-starved. They have 4 to 6 discretionary feats through 11th level. It would be sad to burn them all on a martial feat you won't get to use in combat very often. E.g. The full Summoning feat chain requires 4 feats, the Channeling cluster requires 3-5 feats, and there are more effective melee feat chains that require fewer feats.
* For one or two feats you could have an Animal Companion that could perform very effective Flyby attacks, leaving you free to do something else. This could also get you flying at 5th level.