Hi Catherine! For a flight read that stays twisty and easy to carry, try A Serving of Murder. It starts with a shocking crime and moves in brisk, short chapters that keep the suspense high and the pages turning.
It comes in a light paperback under twenty dollars, and while the tone gets dark at times, the surprises feel earned and it makes the miles fly.
To add to that - Nice pick. If you like that pace, Ruth Ware’s The Woman in Cabin 10 and Shari Lapena’s The Couple Next Door are tight twisty and and both come in mass-market paperbacks under twenty. Lucy Foley’s The Guest List is another quick, satisfying whodunit, and airport racks usually carry these lighter editions so they won’t weigh down your bag.