Analysts at CheapAir.com reviewed more than 351 million individual airfares sold on more than a million international routes in 2016. They tracked flights from the day they went on sale (usually about 11 months in advance) until the day of takeoff to see when each fare hit its lowest point. The resulting map shows how many days before takeoff you should buy your ticket to score the best deal, on average, depending on your destination.
Your best bet for flexibility in these areas comes if you book your stay during the shoulder season when the owner might simply be pleased to fill an otherwise-open weekend or midweek-to-midweek slot. The additional savings in that case might be on your flights to and from your destination, because you won't be paying exorbitant weekend fares to get there and back.
For example, Southwest Airlines boards their planes using a letter-based grouping system. Passengers check in no earlier than 24 hours before their flight and receive a number and letter combination (like A23 or B14). Passengers line up in groups of five, loosely in order and board when your group is called. It’s open seating on Southwest so you get pick your seat.
“I’m a firm believer that everything you need for a trip — whether it be three days or three weeks — should be able to be packed in a carry-on. This is simple once you master the art of layering your clothes. Choose a color combination for your attire and pack only pieces that match this so that you can mix, match and layer to create different looks (instead of packing completely separate outfits).”