"Southwest's customers are rightfully dissatisfied and deserve better," Cantwell said in a statement. "These consumers need refunds and reimbursements for their expenses."

Cantwell said she has spoken with Southwest CEO Bob Jordan and Transportation Secretary Pete Buttigieg about the issue and added that the committee "will be holding hearings for (Federal Aviation Administration) reauthorization to examine how to strengthen consumer protections and airline operations."

(Reporting by David Shepardson; Editing by Mark Porter)