Carriers Raise Domestic Fares, Citing Fuel

Several U.S. airlines moved to raise domestic fares by $10 to $20 per round trip as oil prices resumed their upward trek Thursday, reaching the highest level in more than two decades.

The hike was initiated Wednesday night by United Airlines and Delta Air Lines Inc., and followed Thursday by US Airways. American Airlines and other carriers said they were studying the move and might match.
Forbes