(Reuters) - Spirit Airlines ( SAVE ) forecast its current-quarter revenue below analysts' estimates on Thursday, as excess capacity and intense competition on its routes hamper the ultra-low-cost carrier's pricing power.

It also anticipates a $7.2 million hit to its third-quarter operating income due to operational disruptions caused by the CrowdStrike IT outage, which forced the carrier to cancel 470 flights.

The cyber outage, which was triggered by CrowdStrike's ( CRWD ) "Falcon Sensor" software update, had crippled industries across the globe including airlines.

A rush among carriers to expand capacity in order to cash in on strong summer travel demand has forced airlines to offer tickets at a discount to fill their planes.

The Dania Beach, Florida-based company expects its third-quarter total revenue to be between $1.16 billion and $1.18 billion, compared with analysts' average estimate of $1.33 billion, according to LSEG data.

Spirit is among the most heavily impacted by issues with RTX's Pratt & Whitney Geared Turbofan engines, which have forced it to ground multiple aircraft and have left the airline with bloated costs.

The ultra-low-cost carrier's aircraft utilization fell 6.2% to 10.6 hours in the second quarter, primarily due to jets that were unavailable for service due to the GTF engine issues.

It reported an adjusted loss of $1.44 per share for the quarter ended June 30, wider than analysts' estimates of $1.36 per share.

"Summer demand remains robust and load factors have been strong; however, significant industry capacity increases together with ancillary pricing changes in the competitive environment have made it difficult to increase yields," CEO Ted Christie said.

The carrier's operating revenue fell 10.6% to $1.28 billion, compared with Wall Street expectations of $1.29 billion.