Originally Posted by
rjw242
What happens when you click through to the purchase page for your held flight? If it offers you the lower price, you're good. Otherwise, cancel the hold and purchase* (or create a new hold).
* adding: if you cancel and purchase, probably best to have two tabs open, get all the way to the payment page in one tab, and then cancel the hold in the other tab immediately before buying. Otherwise you run a small risk of the fare going up between when you cancel the hold and try to book the new ticket.
Even better would be to use two browsers (Firefox vs Chrome, for instance).
Some airline and travel sites will only handle one search/purchase at a time, and strange things end up happening. Southwest, for instance, is particularly bad.