Well, I've never used Flovent, but instead have used QVAR (http://www.medkb.com/Uwe/Forum.aspx/asthma/601/Switching-QVAR-to-Flovent). I don't know whether QVAR will be any cheaper, though.
I've also had good luck with Beclazone (http://www.inhousepharmacy.biz/asthma-allergy/beclazone.html), but since this is from a foreign pharmacy (New Zealand-sourced, but manufactured in Ireland), I don't know whether your medical plan will pay for it.
Keep in mind that QVAR inhalers have 100 puffs/canister, whereas Beclazone inhalers have 200 puffs/canister.
Good luck.
Important:
We hope you find this general health information helpful. Please note however, that this Q&A is meant to support not replace the professional medical advice you receive from your doctor. No information in the Answers above is intended to diagnose or treat any condition. The views expressed in the Answers above belong to the individuals who posted them and do not necessarily reflect the views of Remedy Health Media. Remedy Health Media does not review or edit content posted by our community members, but reserves the right to remove any material it deems inappropriate.