Route guide · 1,054 miles
Cheap Flights from West Palm Beach to Islip
PBI → ISP · Nonstop 2h 39m · Live round-trip fares
If Islip is next on your list, here's the honest picture on fares from West Palm Beach. The trip covers about 1,054 miles and takes roughly 2h 39m in the air. Prices on this route reward planners: booking 3–6 weeks ahead is the sweet spot, and the lowest fares tend to sell out fast.
Live fares for PBI → ISP are updating. Use the search below for real-time prices.
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Updated daily
Flight time
2h 39m
Nonstop, typical
Distance
1,054 mi
PBI → ISP
Book ahead
3–6 weeks
Best window, typically
Nonstop airlines
1
Southwest Airlines
Nonstop flights from West Palm Beach to Islip
The fastest way between the two cities is the nonstop: about 2h 39m for the 1,054-mile run from PBI to ISP. Those flights are flown by Southwest Airlines. Prices behave best when you book 3–6 weeks out.
Booking insights: West Palm Beach → Islip
- Distance: 1,054 miles · nonstop flight time: 2h 39m.
- Fares tend to bottom out when you book about 3–6 weeks ahead — earlier than that rarely helps, later usually hurts.
- Midweek departures (Tue–Thu) are consistently cheaper than weekend flights.
- A free fare alert beats daily checking: we watch this route and ping you when prices drop.
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Flying from West Palm Beach to Islip: what you need to know
The flight
The nonstop from PBI to ISP runs about 2h 39m over 1,054 miles. It's a comfortable mid-range flight: long enough that seat choice matters a little, short enough that paying up for extras rarely does.
Airlines on this route
Southwest Airlines flies this route nonstop. That matters more than it sounds: the cheapest fare on one carrier is rarely the same product as the cheapest on another. Checked-bag fees, free seat selection and change rules all differ, so compare the full trip cost before you pick a winner. See our airline guides for exactly what each carrier charges — then send an enquiry and we'll confirm the all-in price for your dates.
Leaving from West Palm Beach (PBI)
Plan to be at the airport two hours before a domestic departure — ninety minutes can work at smaller airports outside peak times, but security lines are the one variable you can't control. If you're checking a bag, add time rather than cutting it close. Our West Palm Beach airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in Islip (ISP)
Before you land, know how you're getting from the airport to where you're staying — it's the part of the trip people forget to plan. The Islip airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check Islip to West Palm Beach fares — prices on the return direction often move on a different rhythm.
When to book
For a trip of 1,054 miles, booking 3–6 weeks ahead typically lands you in the sweet spot. Leave it to the final two weeks and prices usually climb as the cheapest seats sell out. If your dates are flexible, midweek departures are where the lower fares hide on most domestic routes.
Good to know before you go
- Basic economy fares often exclude checked bags and seat selection. Price the whole trip, not the headline fare.
- Get to the airport two hours before departure; security, not the flight, is the part that runs late.
- If you're traveling with only a carry-on, you can skip the bag-drop line entirely with mobile check-in.
- Download the airline's app before you fly; gate changes and delays show up there first.
- Nonstop time on this route is about 2h 39m — a one-stop itinerary needs to be a lot cheaper to be worth the extra hours.
West Palm Beach to Islip flight FAQs
How long is the flight from PBI to ISP?
Nonstop flights from West Palm Beach to Islip take about 2h 39m and cover roughly 1,054 miles. One-stop itineraries add 2–4 hours depending on the layover city.
Are there nonstop flights from West Palm Beach to Islip?
Southwest Airlines typically operate nonstop flights from PBI to ISP. Nonstops are usually cheapest when booked 3–6 weeks ahead of departure.
What is the cheapest month to fly from West Palm Beach to Islip?
There's no single magic month, but prices on this route generally soften in the shoulder season, when demand dips after the holidays and again in early fall. A free fare alert is the easiest way to catch those windows.
How much are last minute flights from PBI to ISP?
Book inside the final week and you'll usually pay a premium on PBI to ISP. Fares booked 3–6 weeks ahead are almost always kinder.
What is a good round-trip deal from West Palm Beach to Islip?
A good deal is anything at or below the recent fares shown above. Set a free Airfare Deal alert and we'll ping you the moment fares drop.
Which airlines fly from West Palm Beach to Islip?
You'll mainly see Southwest Airlines on West Palm Beach to Islip. Checking each against the live fares below is the surest way to find the lowest price for your dates.
How early should I get to West Palm Beach airport for this flight?
Plan on two hours before departure for a domestic flight — ninety minutes can work at smaller airports outside peak times. If you're checking a bag, earlier is better; the bag-drop line, not the flight, is what runs late.
Do the cheapest fares on this route include a checked bag?
Usually not. Basic economy fares on most airlines include a carry-on but charge extra for checked bags, and seat selection can cost more too. Add up the real total before comparing — a slightly higher regular fare sometimes works out cheaper. Our team confirms the full breakdown with you before you pay.
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