For the 2026 Airline Water Study , researchers tested water provided on flights between October 2022 and September 2025. They observed 10 major airlines and 11 regional airlines. Trailing further behind were the major airlines that received a Grade C, which included Southwest Airlines, Hawaiian Airlines and United Airlines. But the lowest scoring major airlines, according to the study, were Spirit Airlines, JetBlue, and American Airlines. The Grade D group was the largest for the regional carriers, featuring SkyWest Airlines, Envoy Air, PSA Airlines, Air Wisconsin Airlines, Republic Airways and CommuteAir.

Source: National Post January 13, 2026 18:47 UTC