LAX/DEN for $27 to $45 ?
 

know WN will load flights beyond 6 January at end of June.

For JAN/FEB flights in 2018, WN regularly had $27 to $45 fares for nonstops LAX/DEN, but can't remember if these specials were as soon as loaded or later.

Can anyone remember ?

I'm afraid I don't remember =( What I do remember is that they were available closer to travel than I'm used to for many other routes. I was able to change my flights for almost free just a few days before the flights.

Rates like that are, in my experience, more likely to be matches to other airlines than straight WN pricing. How are the prices looking on competitors

Right. Those are fare wars, almost never planned ahead or advertised.

Last December I got a same-day DEN-LAX flight for 45$ all in. The price was 40$ in the morning but jumped to 45$ by noon when I booked it. I flew the very same evening.

I suspect it's a match as NK currently has some dates with $27 fares on this route for it's $9 fare club members. Looks to be limited to Tuesdays and Wednesdays. The fares only extend out to early Sep, so I wouldn't expect to see them on WN for later dates. F9 is selling $53 fares for "Discount Den" members.

DAL-DEN can also be a deal at times, right now though lowest I see if $54 on WN

Did a couple of DEN-LAX / LAX-DEN segments last Nov/Dec for $26.98 all-in each way. I believe WN was matching an NK sale on the route. These types of fares are usually not available the day the schedule opens and instead appear later on based on competition.