Best months to fly standby to the Caribbean from the United States

How full flights from the United States to the Caribbean have run, month by month, from the records airlines file with the U.S. government. For each month: how many of the routes ScanSeats can measure ran usually open on every airline, and the airline routes with the most room. ScanSeats has 14 route pages from the United States to the Caribbean.

The months with the most room

September (4 of 5 routes usually open on every airline), November (2 of 5 routes usually open on every airline), March (2 of 6 routes usually open on every airline).

The months with the fewest routes usually open

June (1 of 8 routes usually open on every airline). Plan ahead in these months.

Month by month

How we count: a route counts in a month only when every airline on it flew at least once a day that month, with two or more years on record. Usually open means 80 percent full or less on average for that month. The airline routes listed come from those counted routes and are themselves usually open that month, the emptiest three, each airline once; a route can list an airline that is usually open while another airline on it is not. Months are ranked only with at least 5 counted routes. These are how full flights have run, not live seats, standby lists, or fares. Check with your airline before you travel.

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