Southwest would also be loosing a great deal of money right now if they hadn't locked in their fuel prices, union or no union.
Which highlights, once again, the value of competent management. Southwest is not successful because they are lucky, they are successful because they have a lot of foresight and routinely make savvy business decisions. People scoffed or were indifferent when they were buying up futures contracts for jet fuel from here to eternity at $20/bbl equivalent prices. They could turn a fine profit just reselling those contracts on the open market.