PDX - ISP

$468 Find Cheap Flights from Portland to Islip

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Islip departing on 12/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Islip

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Islip, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Islip, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$980
Multiple Airlines
Thu 11/27Wed 12/3
PDX - ISP • 2 stops
Cheapest one-way
$468
Multiple Airlines
Thu 12/4
PDX - ISP • 2 stops
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Islip!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portland to Islip (PDX-ISP)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Islip that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to Islip

Thu, Nov 27 - Wed, Dec 3
Multiple Airlines Logo
11:12 pm - 7:45 pmPDX-ISP
17h 33m2 stops
Multiple Airlines Logo
9:59 am - 11:48 amISP-PDX
28h 49m2 stops
$980Multiple Airlines
Find Deal
Thu, Nov 27 - Wed, Dec 3
Multiple Airlines Logo
6:30 am - 7:45 pmPDX-ISP
10h 15m2 stops
Multiple Airlines Logo
9:59 am - 8:10 pmISP-PDX
13h 11m1 stop
$1,229Multiple Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Portland to Islip flights

Get data-powered insights and trends into flights from Portland to Islip to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly non-stop between Portland and Islip?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Portland to Islip.

There is just one airline that flies from Portland to Islip direct and that is Southwest. The best round-trip deal found from Southwest for the route is $361.

Good to know

Cheapest flight$468
Flight from Portland to Islip

When to book flights from Portland to Islip

Are your dates flexible? Find out the best times to travel from Portland to Islip based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Portland to Islip

  • What is the cheapest flight from Portland to Islip?

    In the last 3 days, the lowest price for a flight from Portland to Islip was $468 for a one-way ticket and $980 for a round-trip.

  • Do I need a passport to fly between Portland and Islip?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which aircraft models fly most regularly from Portland to Islip?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Portland to Islip?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Islip.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Islip?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Islip from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to Islip?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Islip with an airline and back to Portland with another airline. Booking your flights between Portland and ISP can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Islip?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Islip from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Portland to Islip

 
See real verified KAYAK customer reviews for airlines flying from Portland to Islip. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Islip? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4239 reviews
8.0Comfort
8.6Crew
7.0Food
8.1Boarding
7.5Entertainment
Airline reviews

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

2.0 MediocrePrincess, Oct 2025MSY - DAL
Read more Southwest reviews

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

mandatory demand customer to check their carry on because not enough people check bags.

Connecting flight is on time and boarding was a breeze!

Excellent. Would encourage Southwest to keep current boarding procedures with free style seating. Makes for a fantastic experience

As always, the entire Southwest experience was perfect. Purchasing the tickets on the Southwest web site was effortless, departure and arrival gates were spotless and comfortable, plane was clean and comfortable, crew was excellent and flight was on time. Wheelchair service in Las Vegas at departure was somewhat chaotic and disjointed, but I am not sure if that was Southwest problem, airport problem or combination.

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

After being assaulted by a flight attendant I was then brushed off as oh well because he long braids didn’t mean to whip me in the eye. I have filed complaints and will see. But like any other issue I’ve had with kayak involved it’s been trash. Last time I’ll be using your app

Everything you need to know for your flight from Portland to Islip

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.