PDX - ISP

$587 Find Cheap Flights from Portland to Islip - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$587
Typical prices: $446-$526
Southwest
Fri 11/16Fri 11/23
PDX - ISP • 2 stops
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Cheap Flights from Portland to Islip (PDX-ISP)

 

Cheap flights from Portland to Islip with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Mon, Nov 16 - Mon, Nov 23
Southwest Logo
6:40 am - 9:45 pmPDX  Portland-ISP Islip Long Island
12h 05m2 stops Sacramento Intl Baltimore/Washington
Southwest Logo
5:40 pm - 1:25 amISP  Islip Long Island-PDX Portland
10h 45m2 stops Baltimore/Washington Las Vegas Harry Reid Intl
$587Southwest
Tue, Dec 29 - Tue, Jan 5
Southwest Logo
7:50 am - 11:50 pmPDX  Portland-ISP Islip Long Island
13h 00m2 stops Denver Intl Baltimore/Washington
Southwest Logo
12:30 pm - 10:20 pmISP  Islip Long Island-PDX Portland
12h 50m2 stops Baltimore/Washington Denver Intl
$620Southwest
Mon, Nov 2 - Wed, Nov 4
Southwest Logo
11:30 pm - 11:45 amPDX  Portland-ISP Islip Long Island
9h 15m2 stops Chicago Midway Baltimore/Washington
Southwest Logo
12:30 pm - 10:20 pmISP  Islip Long Island-PDX Portland
12h 50m2 stops Baltimore/Washington Denver Intl
$647Southwest
Tue, Dec 22 - Tue, Dec 29
Southwest Logo
8:35 am - 11:50 pmPDX  Portland-ISP Islip Long Island
12h 15m2 stops Phoenix Sky Harbor Intl Baltimore/Washington
Southwest Logo
4:55 pm - 1:15 amISP  Islip Long Island-PDX Portland
11h 20m2 stops Baltimore/Washington Las Vegas Harry Reid Intl
$924Southwest
Sun, Nov 29 - Sun, Dec 20
Southwest Logo
5:20 am - 7:15 pmPDX  Portland-ISP Islip Long Island
10h 55m2 stops Chicago Midway Baltimore/Washington
Southwest Logo
4:55 pm - 1:10 amISP  Islip Long Island-PDX Portland
11h 15m2 stops Baltimore/Washington Las Vegas Harry Reid Intl
$1,193Southwest
Sat, Nov 28 - Sun, Dec 20
Southwest Logo
9:45 am - 11:50 pmPDX  Portland-ISP Islip Long Island
11h 05m2 stops Denver Intl Orlando
Southwest Logo
4:55 pm - 12:15 amISP  Islip Long Island-PDX Portland
10h 20m2 stops Baltimore/Washington Chicago Midway
$1,225Southwest

Price, demand and travel trends for Portland to Islip flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Portland to Islip?

Round-trip flights from Portland to Islip typically range from $446 to $526. The lowest price found in the past 5 days was $587, on Southwest.

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Key details for Portland to Islip flights

Cheapest flight

$587
Round-trip 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

Your Portland to Islip flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Do I need a passport to fly from Portland to Islip?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • Have flight prices from Portland to Islip changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $587 to $1,225. That means the highest observed fare was about 2x higher than the lowest one.

  • What car rental options are available at Islip Long Island Airport (ISP)?

    Islip Long Island Airport (ISP) hosts 5 major car rental companies, with daily rates starting from around $38 for economy cars. Top options include:

    • Budget
    • Enterprise Rent-A-Car
    • Avis
    • National
    • Empire Rent A Car

  • Which airports can I use when flying from Portland to Islip?

    Flights from Portland to Islip usually depart from Portland (PDX) and arrive at Islip Long Island (ISP).

  • Which airports do connecting flights from Portland to Islip pass through?

    Most connecting flights from Portland to Islip pass through Baltimore/Washington (BWI), which handles 100% of one-stop traffic on this route.

  • What is the time difference between Portland and Islip?

    Islip is 3 hours ahead of Portland (Eastern Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

More options for your flight from Portland to Islip

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