The graph still shows how the market has gotten more expensive. You have to infer it from the data as other moving parts obfuscate the reality.
In 2011, airfare was approx. 305 and jeta was approx. $3. Today jeta is around 1.6 (per your chart) and airfares are down about 5% to 290ish. We should probably ignore the last datapoint because it seems like an outlier.
When you take your same airline fares data further back, (same source) airline fares were approx. 240ish in 2007. Today they are 295ish. And in 2007 jet fuel prices (again from FRED) were around $2 then and 1.3 today.
There's no doubt relative to input costs fares have gone up and the only qualitative change in the US is capacity has been taken out through mergers. It's also no surprise that airlines are earning record profits as this trend was formed.
https://fred.stlouisfed.org/series/CUSR0000SETG01
https://fred.stlouisfed.org/series/WJFUELUSGULF
You are a smart guy so I don't need to tell you this. But there are a lot of moving parts here and you are skipping over a lot of them to over simplify this. Why don't you start here.
http://www.forbes.com/sites/uhenerg...lion-lost-in-hedging-fuel-costs/#54bd8e416d02
And Delta is not the only airline getting decimated on their hedges. Oil volatility is NOT good for the airlines. It does not matter if oil prices go up or down, large fluctuations causes them to over react and put on bad hedges at bad prices. Imagine that. Most airlines got caught hedging their fuel costs at MUCH higher prices. Nobody thought oil was going to get this low 2 or 3 years ago, the airlines included.