Time of day. The first flights of the morning have the calmest air and the cleanest light, and in summer they are the only slots that reliably operate. Sunset flights are the most photogenic and the most oversubscribed; book those a week or more ahead. Middle of the day gives you flat overhead light and, in summer, heat haze.
Season. December through April is the clear, dry, reliable window, and it is also the busiest and most expensive. June to November is hurricane season, with the peak from August to October, and the pattern that matters day to day is the short violent afternoon thunderstorm rather than all-day rain. A storm cell that grounds flights at 3pm has often cleared by 5pm, but the schedule behind it does not always recover.
Book early in your trip. This is the single most useful piece of planning advice on this page. If your flight cancels for weather on day one, you have the rest of the week to rebook. If you booked it for the morning of your departure, you have lost it.
Cancellation terms. Weather cancellations by the operator are normally refunded or rebooked, and free-cancellation windows for customer changes are typically 24 hours. Read which is which, because the two policies are not the same thing.
Art Basel week, 4 to 6 December 2026 with satellite fairs from 30 November, takes capacity out of the market and raises prices across both cities. Book before the end of October if your trip falls in that window.