Spirit Airlines reported a second-quarter loss as strong travel demand and higher fares weren't enough to overcome a surge in costs.

Miramar, Florida-based Spirit posted a net loss of $52.4 million for the three months ended June 30.

Higher costs have hit other carriers as well, including JetBlue, which reported a second-quarter loss last week.

And Mesa Air Group, a regional airline that flies for United and other carriers, posted a $10 million loss for the last quarter, due to challenges from higher costs associated with the pilot shortages?