I wiosh folks would be more specific about WHY they have selected a particular carrier as their favorite low fare airline.
I mean...it's kind of strange to choose an airline that has been in service 3 months...and may or maynot be around in 3 years.
Obviously, I am gonna pick Southwest. Why? The have stamina. They are going to be around for a while. They bring low fares to whatever markets they fly in and out of...and its getting to where they fly in and out of quite a few.
It also helps that they offer a reliable product. Sort of like McDonald's...you may not like the food all that much, but you get the same burger in Fort Worth as you do in Fort Lauderdale, Fort Smith, or Fort Lee NJ.
JetBlue may be a real nice deal...but until we start seeing some financials its gonna be tough to say whether or not they are the future of low fare carriers. Seriously, the business is all about profit...and if they can't make a profit at low fares while offering all those amenities they aren't going to be around.
Vanguard is a bottom feeding discount carrier....not a low fare carrier. I tried to fly them on short notice on a number of occasions and their walk up fares were not low in any way, shape, or form. They were wanting $219 each way from MCI to DFW...I could buy walk up tickets on WN for considerable less (I am active duty military, and the military fare from MCI to OKC and OKC to DAL came out to roughly $112 as I recall).
I asked the Vanguard res agent why the fare was so high...and was told quite succinctly that they were a discount rather than a low fare carrier. Go figure. My guess is they won't last much longer.