Southwest Airlines Flights from Islip to West Palm Beach

Southwest Airlines on this route

Southwest Airlines serves ISP–PBI through its hub network, usually with one connection. The nonstop flight time is about 2h 47m.

Fare classes available: Basic, Choice / Choice Preferred, Choice Extra. Southwest does not charge change fees on any fare; you pay the fare difference if the new flight is more expensive.

The lowest one-way fare we have on record for this route is $536 on Southwest. Fares like that usually show up on off-peak days and for travel booked a few weeks out; an agent can check whether a similar fare is available for your dates.

Because Delta Air Lines treats West Palm Beach as a hub, this pairing tends to have frequent departures throughout the day. American Airlines and Southwest Airlines also compete here, which keeps fares in check.

The 1,054 miles between Islip and West Palm Beach works out to about 2h 47m in the air, the range where nonstops are common on busy days and connections through a hub fill in the rest. Ask the agent to compare both; the one-stop is sometimes cheaper by a wide margin.

When to fly

Winter fares out of the Northeast peak around the holidays and February school breaks; late April to early June and September to early November are usually the calmest on price.

Tuesday, Wednesday, and Saturday departures are usually the cheapest days on domestic routes; Friday and Sunday are the most expensive. Early-morning and late-evening flights are often priced below the midday departures.

For domestic travel, booking three to eight weeks ahead usually captures the best price. Inside two weeks, fares climb; more than four months out, airlines have not yet released their cheapest inventory.