Either book very early or go odd
Popular corridors sell out at sane prices. Consider secondary airports, Thursday night departures, or Monday returns.
National parks on holiday weekends
Expect gates and lots to fill by mid-morning. Enter at dawn or after 4 p.m. when rules allow.
City strategy
Book dinner reservations the week before. Museums may need timed tickets—check even for “walk-in” places.
Flexibility premium
Refundable or changeable rates cost more but can pay for themselves when crowds spike prices.