The air travel regulator must be given powers to fine airlines who ignore passengers' legal rights, a consumer rights group has said.
Alongside more powers for the Civil Aviation Authority, Which? said lessons must be learned from the "travel shambles" over the Easter holidays.
Travellers have faced long delays in recent days and weeks, with security issues causing many to miss flights.
Multi-hour waits and queues snaking out of terminals have been reported.
Disruption has also been seen in significant delays at passport checks and baggage reclaim, with some of the worst hit airports including Manchester, Heathrow, Birmingham and Gatwick.
Demand for travel is strongly rebounding after the UK's Covid travel restrictions were lifted last month.