The OP is correct - oil is going to increase in price. Thing is, everybody knows that, the only unknowns are "when" the increases happen and "how high" will prices go. Since everybody knows that oil is going to go up in price, there aren't very many people willing to take the other side of the gamble at a cheap price. Today's market prices are cheap, but futures pricing has not declined substantially, so hedging contracts for the future are not at today's low prices.
In the early 2000s, when Southwest embarked on its famous fuel-hedging victories, there were lots of sophisticated financial types who did not foresee oil climbing as high or as fast as it did. Recall that the huge price spike began around Labor Day, 2005, when Hurricane Katrina hit, and by then, WN had already saved billions by successfully hedging for several years before that. From Labor Day 2005 to July 2008, oil prices spiked from about $50/bbl to about $140/bbl, and WN made a killing.
Now, as a result of the steep and unexpected price collapse in the second half of 2014, everybody expects oil to go back up. It will have to stay cheap for a long time to eliminate that expectation. The successful hedgers will be the ones who time the market correctly and capitalize on those vulnerable financial types once they have been lulled into a false sense of security, thinking that the low prices will stick around. Right now, nobody expects the low prices to stay where they are long-term. That's why the OP would like to lock in today's prices for the long-haul. It's unfortunate that the hedging counterparties are as sophisticated and cautious as they are. That sophistication and caution is telling them not to gamble that prices stay low for a long time.
If AA had sufficient storage capacity, say 12-16 billion gallons worth, then AA could fill up the storage tanks at today's cheap prices and then use that fuel for the next 3 to 4 years. That way, AA could lock in today's prices at the cost of the storage facility and the interest cost on the purchase price (interest would eat up about 5% annually). Its not realistic to try to store more than 10 billion gallons of jet fuel, so that ain't happening.