Originally Posted by
Boraxo
Would be tempting if I absolutely have to be somewhere (but then I probably would not book Frontier) or perhaps for flights that are notoriously delayed. However it does not seem to apply to missed connections which would be my biggest concern. Don't want to get stuck in DEN
Good point, if your original flight isn't delayed more than two hours but still miss the connection this service doesn't do anything for you.
I've used Hopper before through the Capital One travel portal and the prices were typically what you could find on any other OTA, but the fact that you'll be looking at last minute booking prices means $400 may not cover the entire price of the ticket.