The Essential Air Service Reliability Act of 2025 aims to enhance the dependability of basic essential air service by amending federal law. Specifically, it modifies section 41733 of title 49, United States Code, to introduce a new requirement for air service providers. Under this bill, any application seeking compensation for providing basic essential air service must now include a contingency plan . This plan is crucial for ensuring the uninterrupted continuation of air service to eligible communities in the event of disruptions, excluding those caused by weather. The Secretary of Transportation is directed to ensure this new application requirement is in effect no later than 180 days after the bill becomes law.