Need to order flowers for the bridal party?

Is it better to order flowers from online or go to a florist. I was originally going to do the fakes but I changed my mind. I am getting married on the beach and want a tropical look. The shops are so expensive. I have 6 girls and myself to buy for. My fiance doesn’t want any for the guys since they are wearing only a white shirt and khaki pants. Is there a good place to go online? Has anyone ever used an online shop for wedding flowers?
I actually thought about getting them the morning of. It isn’t until 5:30. I’m just afraid I wont be able to find any. Publix always has really nice flowers for cheap.

For me it was alot cheaper online. I’m only buying the flowers for my centerpieces online. My bouquets are going to be of roses and calla lillies. I live in nyc and they are places here that you buy 2 dozen roses for $10. So that’s where i’m buying my roses and calla lilies.
These are some great wholesale flower places i have found online and will be ordering from.

http://www.fiftyflowers.com/flowers/AllFlowers_1.htm

http://www.wholesale-wedding-flowers.com/

Bridal Party Tees at the Dallas Bridal Show!