A budget airline just revealed a startling change in the cost of flying

Airfares for the cheapest U.S. airline jumped in price this year, but that hasn’t stopped fliers from booking. Frontier Airlines revealed that its ticket prices surged in its third quarter earnings report, published on Wednesday. The airline’s fare revenue per passenger jumped from $39.74 to $67.82 in Q3 – a 71% increase. That metric looks at ticket prices alone and doesn’t factor in the add-on costs passengers might pay for things like upgrades and checked luggage. Frontier’s total...