Rory Boland, Editor of Which? Travel, said: "Unacceptably long queues and widespread chaos at airports are causing huge amounts of stress to those who have planned to get away this half-term and bank holiday weekend. "The situation requires an immediate response and the government must work with airlines and airports to ensure they have the resources and capacity to put an end to the last-minute flight cancellations and disruption we are seeing. "When their flight is cancelled, all most passengers want is to be put on another plane and taken to their destination. The Civil Aviation Authority should remind airlines of their duty to offer passengers the option of rebooking on any reasonable route as quickly as possible - even if that means using other carriers. Too often this legal requirement is not being met. "The fiasco of domestic and international flight cancellations shows why consumer travel protections must be strengthened, not weakened. The Department for Transport should shelve its plans to water down passengers' rights to compensation when their UK flight is delayed or cancelled, and give the CAA fining powers so they can take swift action when airlines flout the rules." ENDS