Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Islip, New York to Portland from $192

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to Portland departing on 8/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Islip, New York to Portland

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
6:00 am - 2:20 pm
ISP
-
PDX
11h 20m
2 stops
Southwest Logo
6:15 am - 7:55 pm
PDX
-
ISP
10h 40m
2 stops
$477Southwest
Thu, Oct 22 - Wed, Oct 28
Southwest Logo
8:55 am - 3:25 pm
ISP
-
PDX
9h 30m
1 stop
Southwest Logo
9:20 pm - 8:20 am
PDX
-
ISP
8h 00m
1 stop
$587Southwest
Wed, Jul 22 - Sun, Jul 26
Southwest Logo
2:55 pm - 10:40 pm
ISP
-
PDX
10h 45m
2 stops
Southwest Logo
9:20 pm - 8:20 am
PDX
-
ISP
8h 00m
1 stop
$592Southwest
Wed, Jul 22 - Sun, Jul 26
Southwest Logo
2:55 pm - 10:40 pm
ISP
-
PDX
10h 45m
2 stops
Southwest Logo
11:30 pm - 2:30 pm
PDX
-
ISP
12h 00m
2 stops
$597Southwest
Wed, Jul 22 - Sun, Jul 26
Multiple Airlines Logo
7:25 am - 1:19 pm
ISP
-
PDX
8h 54m
1 stop
Multiple Airlines Logo
7:00 am - 7:45 pm
PDX
-
ISP
9h 45m
1 stop
$994Multiple Airlines
Thu, Oct 22 - Wed, Oct 28
Multiple Airlines Logo
7:25 am - 1:19 pm
ISP
-
PDX
8h 54m
1 stop
Multiple Airlines Logo
7:37 pm - 11:05 am
PDX
-
ISP
12h 28m
2 stops
$999Multiple Airlines
Thu, Oct 22 - Wed, Oct 28

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Southwest flights from Islip, New York to Portland

Our best Southwest deals on Islip, New York to Portland flight tickets
Southwest
Aug 10
ISP6:10 amIslip Long Island
11h 50m
1 stop
PDX3:00 pmPortland
Aug 19
PDX10:45 pmPortland
7h 55m
1 stop
ISP9:40 amIslip Long Island
$472
Southwest
Oct 22
ISP6:00 amIslip Long Island
11h 20m
2 stops
PDX2:20 pmPortland
Oct 28
PDX6:15 amPortland
10h 40m
2 stops
ISP7:55 pmIslip Long Island
$477
Southwest
Aug 10
ISP6:10 amIslip Long Island
11h 50m
1 stop
PDX3:00 pmPortland
Aug 19
PDX6:45 amPortland
11h 20m
2 stops
ISP9:05 pmIslip Long Island
$478

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to Portland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 9, 2026.
Use the filters below to find and compare flights from Islip, New York to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Thu 10/22

6:00 am-2:20 pm

2 stops11h 20m

Portland

Wed 10/28

6:15 am-7:55 pm

2 stops10h 40m

$477
Quickest round-trip

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Wed 7/22

8:55 am-3:25 pm

1 stop9h 30m

Portland

Sun 7/26

9:20 pm-8:20 am

1 stop8h 00m

$587

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Wed 7/22

2:55 pm-10:40 pm

2 stops10h 45m

Portland

Sun 7/26

9:20 pm-8:20 am

1 stop8h 00m

$592

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Wed 7/22

2:55 pm-10:40 pm

2 stops10h 45m

Portland

Sun 7/26

11:30 pm-2:30 pm

2 stops12h 00m

$597

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Thu 10/22

7:25 am-1:19 pm

1 stop8h 54m

Portland

Wed 10/28

7:00 am-7:45 pm

1 stop9h 45m

$994

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Thu 10/22

7:25 am-1:19 pm

1 stop8h 54m

Portland

Wed 10/28

7:37 pm-11:05 am

2 stops12h 28m

$999
Cheapest one-way
Quickest one-way

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Fri 8/21

10:20 am-3:00 pm

1 stop7h 40m

$192

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Fri 8/21

4:05 pm-11:40 pm

2 stops10h 35m

$197

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Fri 8/21

2:28 pm-5:11 pm

2 stops29h 43m

$214

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Fri 8/21

2:28 pm-5:11 pm

3 stops29h 43m

$227

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

See travel insights to Portland from

How to get the cheapest flight ticket from Islip, New York to Portland

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Portland?

The cheapest day to depart on your flight to Portland is on a Wednesday when prices can be found for as low as $392. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Portland is Monday, with ticket prices averaging around $500.

What is the cheapest time of day to depart on your flight to Portland?

The cheapest time of day to fly to Portland is in the morning when flights can be purchased for as low as $429. In the evening is when there is more demand to fly to Portland, so prices are often more expensive at around $528 per ticket.

Can stopping save me money on Islip, New York to Portland flights?

You could potentially save up to 26% on your flight if you consider stops on a Islip, New York to Portland flight.

When to book flights from Islip, New York to Portland

Are you open to changing your travel dates? Check out the ideal times to fly from Islip, New York to Portland according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip, New York to Portland (ISP to PDX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to Portland

Fastest flight time

9h 30m

Direct flights

None
The fastest flight from Islip, New York to Portland takes 9h 30m
There are no direct flights from Islip, New York to Portland. There are no popular flight routes from Islip, New York to Portland.
Search flight deals

Frequently asked questions about flying from Islip, New York to Portland

  • How far is Islip Long Island to Portland by plane?

    The distance between Islip Long Island and Portland is about 2474.8 mi. A reasonable flight in good conditions will take 9h 30m.

  • When did momondo last update prices for flights from Islip Long Island Airport to Portland Airport?

    Prices for flights from Islip Long Island Airport to Portland Airport were last updated today.

  • How old do you have to be to fly from Islip Long Island Airport to Portland Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Islip Long Island Airport to Portland Airport.

  • What documentation or ID do you need to fly to Portland Airport?

    The required travel and health documents for your Portland Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portland Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Lincoln City
Seaside
Vancouver
Cannon Beach
Salem
Astoria
Long Beach
Beaverton
Rockaway Beach
Hillsboro
Depoe Bay
Tigard
Hood River
Longview
Newberg
Clackamas
Troutdale
McMinnville
Gresham
The Dalles

Why use momondo?

Why should I use momondo to find a flight deal from Islip to Portland?

Finding the right flight to Portland from Islip is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Portland quick and easy, saving you time and money.

Can I find flights from Islip to Portland with flexible booking policies on momondo?

Yes. All flights to Portland from Islip on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Islip to Portland?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Portland from Islip.

I’m not ready to book a flight from Islip to Portland right now. Can momondo alert me if prices change?

Price alerts on flights to Portland from Islip are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Portland trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 8/8
Sat 8/15
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States