My bridesmaids got their dresses from David's Bridal, but I have seen that Azazie is also very popular among brides on this site. I didn't know they existed until after my girls already had their dresses.
The bridesmaids dresses for my wedding came from David's Bridal. They have the most reasonably priced dresses and many locations so that made it easy. However, I would check out rent the runway (I've heard good things) and actually Amazon (they have everything).
Lulus has some orange dresses and they are very affordable. They have some really gorgeous colors and their dresses tend to be well made. Orange isn't a super popular color - it can be hard for many to pull off, isn't as versatile for a variety of occasions as other dresses, and isn't a common bridesmaids/wedding color - so unless you are paying for all of your maids dresses I think price should be a consideration. If you love orange you should totally go for it, I just think price is always something to consider when asking others to pay for things for your wedding. Since orange dresses will be harder to resell and probably more difficult to rewear again than a less flashy, more common color, I think finding something at a reasonable price point would be really appreciated by your wedding party.
Lulu's has some gorgeous orange dresses and most are under $100:
One of Bridesmaids got hers custom made by the same lady that made my dress any my moms dress and my other bridesmaid got hers at David’s Bridal but had the same lady make som small alterations to it. I loved doing costume made as my bridesmaid adores he dress and was so excited about! Makes me happy she can be comfortable in it. The dressmakers was very affordable too.
Those dresses are gorgeous. I love Lulu's dresses for the price, especially if you can find them on sale! I feel like dresses from Lulu's are still beautiful and fancy but can be more re-wearable than more traditional "bridesmaids" dresses from some companies.