There have been several attempts by airlines to raise airfares during the past few weeks, most failing due to lack of widespread participation. One finally stuck on Friday, with most airlines matching an increase led by Southwest Airlines.

Southwest Airlines passenger planes are seen at Chicago's Midway Airport in Illnois.

Southwest initiated a $10 roundtrip fare increase on Friday to nearly a third of its flights. By the end of the day, American Airlines, Delta Air Lines, United Continental and US Airways matched the increase.