Holiday travel adds pressure to stressed industry as more US flights canceled

Airlines, reeling from pilot and staff shortages and the effects of bad weather, have interrupted 19,000 flights since Thursday

The confluence of two holidays, Father's Day and Juneteenth, and a season of revenge travel" continued to heap pressure on the already stretched airline industry as 4,200 additional US flights were delayed and 900 canceled on Sunday, pushing the total number of flights interrupted since Thursday to 19,000.

Delta was hit hardest, with 6% of its total flights on Sunday cancelled. A further 200 flights were cancelled early Monday.