Airlines cite high fuel costs as they raise fares Feb 16 03:35 PM US/Eastern DALLAS (AP) - If you're buying an airline ticket in the next few days, get ready to pay a few bucks more. According to fare trackers, JetBlue Airways and Southwest Airlines are leading a round of price increases that will boost the base fare on many medium-length and long flights by $10 per round trip. United, Delta, American and US Airways said Thursday that they had matched the increases. Southwest says it's raising prices to cover higher fuel costs.