IAH Houston - LAX Los Angeles

I’ve been flying Frontier almost exclusively for a couple of months now (and genuinely love it, by the way). I’m a bi-monthly flier and have booked my flights through early August.

However, when trying to book beyond August 16, there are no dates shown. Is this simply because Frontier has not (or does not) schedule flights that far in advance, or should I worry that the IAH-LAX routes are being discontinued? Thanks in advance for the insight.