Flight schedule changes can be complicated. Consider what happened to Kate Canady, who booked two tickets to fly from Seattle to Dubuque, Iowa, in 2020.

Hawaiian will start flying its Seattle-Tokyo route with the 787 in early January. Hawaiian Airlines is adding flights this winter to accommodate "strong seasonal demand" in its key markets.

On a recent Wednesday morning, passengers on a flight from D.C. to Hartford settled in for the 90-minute journey, the travel time on the reservation. Forty-five minutes later, the plane pulled ...