glad to return to a substantitive discussion.
I don't see any data that shows that WN raised fares by 39% but I do see from average fare data for the US that WN's fares have increased a whole lot faster than other carriers.
Likely reasons:
1. Remember that WN benefitted greatly from its fuel hedging strategy in the early 2000s; those fuel hedges allowed WN to price well below what other carriers could charge. The reason WN grew as quickly as they did in cities like DEN and PHL was directly related to their fuel hedge positions in the early part of the 2000s... not surprisingly, they went after carriers that were weak in BK and largely did not have hedges. As the fuel hedge benefits for WN rolled away, they had to raise fares to more viable levels.
2. As WN's growth moved away from deep discounting to establish market share in large business markets (quite different from its traditional strategy of focusing on non-competitive airports where IT was the dominant carrier), its strategy moved to making money in those key business markets - where fares are higher than in smaller more heavily leisure dominated markets, esp. on the east coast. WN's average fares in PHL over 4 years grew by 30% and in BWI by more than 20% - faster than WN's average fare growth for its system. WN's desire to get into big east coast business markets via FL is because those markets have higher average fares.
3. WN is flying longer average stage lengths and passenger trip distance is increasing- revenue is expected to grow. WN acknowledged like everyone else that the post 9/11 airport hassle pushed alot of passengers on shorter trips into their cars... plus the efficiency of aircraft travel increases with longer trip distances.
It's no surprise that WN's average fares have gone up faster than the industry due to the expiration of its fuel hedges, its transformation from fuel-hedge driven growth to market fare driven growth, and its growth on the east coast where there are more business travelers and the limited airport capacity helps keep fares higher.
BTW, in nearly all markets where FL and WN compete now (MKE, BWI, etc), WN already has an average fare premium of 15-20% over FL.... they know there is great opportunity to get more revenue out of FL's system - even on comparable routes.
FL's average fares in ATL are below what WN gets in comparable east coast markets - partly a reflection that FL connects too many passengers and has too small of a local market based on the size of its network.
Fares in alot of markets will go UP as WN eliminates a competitor as well as in ATL as they use the FL assets better.
WN may increase their market share by several percent points but average fares are likely to go up which will help WN and DL - and every other carrier in ATL.
Remember that WN's costs are higher than WN's and they have to price to reflect their costs; the network carriers priced below costs for too long and are either dropping markets, merging, or reworking their strategies to remain in markets they can profitably serve or get out of those markets. WN is no different.
People don't appreciate how much low fare competition is being eliminated by the merger between FL and WN and by the likely failure - or signficant restructuring of Frontier - whcih WN has helped to push to the breaking point.
If it was the network carriers that went through huge transformation in the 2000s, it will be low fare carrier segment that is transformed this decade.
It is very doubtful that we will see near as big of a difference in fares between low fare carriers and network carriers in a few years, esp. as WN's costs become more "legacy like" - remember it just started retiring people with 30 years of service a couple years ago... but the pace of those retirements will increase. Wn's workforce is becoming more and more senior.
Finally, keep in mind that other carriers including FL obtain revenue from fees while WN does not... the sum total of WN's average fare increases can be seen in its ticket prices... for other carriers, you need to take those revenue increases and spread them over their system - you will see their average fares go up. Other carriers, including the network carriers, have obtained alot of their fare increases through fees... if you allocated fee revenue to fares, you might see that WN's average fare increases don't look as large in comparison.