It was a pricey and chaotic summer for air travel. A bigger share of flights were delayed or canceled during the main late spring and summer travel season, which runs from Memorial Day weekend through Labor Day, compared with the same period of pre-pandemic 2019. And on Sept. 1, the Department of Transportation published a dashboard that spells out what customers are owed when airlines delay or cancel their flights. "We're seeing a really strong September," Patrick Quayle, United Airlines' senior vice president of global network planning and alliances, said at a Cowen industry conference this week. As airlines prepare for the fall — and busy year-end holidays — here's how they handled the heat this summer:

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