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Cheap flights from Islip, New York to Portland from $377

This is the cheapest round-trip 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 1/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

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Southwest Logo
12:40 pm - 10:15 pmISP-PDX
12h 35m2 stops
Southwest Logo
6:00 am - 9:55 pmPDX-ISP
12h 55m2 stops
$377Southwest
Find Deal
mié., ene. 7 - mié., ene. 14
Southwest Logo
11:50 am - 8:15 pmISP-PDX
11h 25m2 stops
Southwest Logo
6:45 am - 9:55 pmPDX-ISP
12h 10m2 stops
$457Southwest
Find Deal
vie., ene. 16 - vie., ene. 23
Southwest Logo
12:40 pm - 10:00 pmISP-PDX
12h 20m2 stops
Southwest Logo
6:15 am - 9:40 pmPDX-ISP
12h 25m2 stops
$543Southwest
Find Deal
lun., dic. 1 - lun., dic. 8
Multiple Airlines Logo
1:27 pm - 6:08 pmISP-PDX
31h 41m2 stops
Multiple Airlines Logo
6:56 pm - 5:55 pmPDX-ISP
19h 59m2 stops
$834Multiple Airlines
Find Deal
vie., dic. 19 - vie., dic. 26
Multiple Airlines Logo
1:27 pm - 6:08 pmISP-PDX
31h 41m2 stops
Multiple Airlines Logo
9:29 pm - 5:55 pmPDX-ISP
17h 26m1 stop
$879Multiple Airlines
Find Deal
vie., dic. 19 - vie., dic. 26
Multiple Airlines Logo
9:59 am - 8:48 pmISP-PDX
13h 49m1 stop
Multiple Airlines Logo
7:00 am - 7:45 pmPDX-ISP
9h 45m1 stop
$894Multiple Airlines
Find Deal
mié., ene. 7 - mié., ene. 14
Multiple Airlines Logo
7:30 am - 6:56 pmISP-PDX
14h 26m2 stops
Multiple Airlines Logo
1:24 pm - 4:15 pmPDX-ISP
23h 51m3 stops
$933Multiple Airlines
Find Deal
vie., ene. 16 - vie., ene. 23
Multiple Airlines Logo
12:40 pm - 8:48 pmISP-PDX
11h 08m1 stop
Multiple Airlines Logo
7:00 am - 7:45 pmPDX-ISP
9h 45m1 stop
$934Multiple Airlines
Find Deal
vie., ene. 16 - vie., ene. 23
Multiple Airlines Logo
9:59 am - 8:49 pmISP-PDX
13h 50m1 stop
Multiple Airlines Logo
7:04 am - 7:45 pmPDX-ISP
9h 41m1 stop
$1,384Multiple Airlines
Find Deal
lun., dic. 1 - lun., dic. 8
Multiple Airlines Logo
9:59 am - 12:18 amISP-PDX
17h 19m2 stops
Multiple Airlines Logo
7:04 am - 7:45 pmPDX-ISP
9h 41m1 stop
$1,392Multiple Airlines
Find Deal
lun., dic. 1 - lun., dic. 8

Southwest flights from Islip, New York to Portland

Our best Southwest deals on Islip, New York to Portland flight tickets
Southwest
Jan 7
ISP12:40 pmIslip Long Island
12h 35m
2 stops
PDX10:15 pmPortland
Jan 14
PDX6:00 amPortland
12h 55m
2 stops
ISP9:55 pmIslip Long Island
$377
Find similar
Southwest
Jan 16
ISP11:50 amIslip Long Island
11h 25m
2 stops
PDX8:15 pmPortland
Jan 23
PDX6:45 amPortland
12h 10m
2 stops
ISP9:55 pmIslip Long Island
$457
Find similar
Southwest
Dec 1
ISP12:40 pmIslip Long Island
12h 20m
2 stops
PDX10:00 pmPortland
Dec 8
PDX6:15 amPortland
12h 25m
2 stops
ISP9:40 pmIslip Long Island
$543
Find similar

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 noviembre 4, 2025.
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

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

mié. 1/7

12:40 pm-10:15 pm

2 stops12h 35m

Portland

mié. 1/14

6:00 am-9:55 pm

2 stops12h 55m

$377

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

vie. 1/16

11:50 am-8:15 pm

2 stops11h 25m

Portland

vie. 1/23

6:45 am-9:55 pm

2 stops12h 10m

$457

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

lun. 12/1

12:40 pm-10:00 pm

2 stops12h 20m

Portland

lun. 12/8

6:15 am-9:40 pm

2 stops12h 25m

$543

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

vie. 12/19

1:27 pm-6:08 pm

2 stops31h 41m

Portland

vie. 12/26

6:56 pm-5:55 pm

2 stops19h 59m

$834

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

vie. 12/19

1:27 pm-6:08 pm

2 stops31h 41m

Portland

vie. 12/26

9:29 pm-5:55 pm

1 stop17h 26m

$879

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

mié. 1/7

9:59 am-8:48 pm

1 stop13h 49m

Portland

mié. 1/14

7:00 am-7:45 pm

1 stop9h 45m

$894

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

vie. 1/16

7:30 am-6:56 pm

2 stops14h 26m

Portland

vie. 1/23

1:24 pm-4:15 pm

3 stops23h 51m

$933

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

vie. 1/16

12:40 pm-8:48 pm

1 stop11h 08m

Portland

vie. 1/23

7:00 am-7:45 pm

1 stop9h 45m

$934

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

lun. 12/1

9:59 am-8:49 pm

1 stop13h 50m

Portland

lun. 12/8

7:04 am-7:45 pm

1 stop9h 41m

$1,384

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

lun. 12/1

9:59 am-12:18 am

2 stops17h 19m

Portland

lun. 12/8

7:04 am-7:45 pm

1 stop9h 41m

$1,392

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 $394. 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 Sunday, with ticket prices averaging around $493.

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 evening when flights can be purchased for as low as $357. At noon is when there is more demand to fly to Portland, so prices are often more expensive at around $507 per ticket.

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

You could potentially save up to 45% 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

Direct flights

None
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

  • 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 11h 08m.

  • 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
Cannon Beach
Vancouver
Salem
Astoria
Long Beach
Depoe Bay
Rockaway Beach
Beaverton
Hillsboro
Hood River
Gresham
McMinnville
Longview
The Dalles
Pacific City
Tigard
Manzanita
Tillamook

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.

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