In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

If weather is an important factor for your trip to Islip, New York, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

What are the most popular routes from State of Washington to Islip, New York?

Most travelers choose Portland - Islip Long Island, Pasco Tri Cities - Islip Long Island or Seattle/Tacoma Intl - Islip Long Island when deciding on the best route from State of Washington to Islip, New York.

How far in advance should I book a flight from State of Washington to Islip, New York?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 61 days in advance, which can save you up to 109% on flights from State of Washington to Islip, New York compared to booking the week you need them. Waiting 61 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $412. For sooner than that we have options available in the next 3 days from $686.

What is the cheapest month to fly from State of Washington to Islip, New York?

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, January can be a great choice for travel to Islip, New York. Flights to Islip, New York from State of Washington in January are about $393 on average during January, but can be found for as low as $230.

What is the cheapest time of day to fly from WA to ISP?

When flying from State of Washington to Islip, New York, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly into for flights to Islip from Washington?

If you book a flight to Islip from Washington, you will be flying to Long Island, which is the city’s only airport. Islip Long Island (ISP) is located 7.2 mi from the center of Islip.

Can I find deals for flights from Washington to Islip that include hotel bookings?

Yes. In addition to deals on Washington to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Washington to Islip?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Islip.

Can I find deals for business class flights from Washington to Islip?

Yes. Cheapflights offers flight deals from Washington to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$404+ Flights from Washington to Islip, NY

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Cheap flight deals from Washington to Islip

Round-trip from	$404 (Southwest)
Popular in	December
Cheapest in	January
Average price	$447

From Washington to Islip Long Island

Search Deals

Highest demand for flights based on searches. 2% potential increase in price ($9 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

Find flight deals from Washington to Islip

Cheapest flights from Washington to Islip
Explore the most affordable flight options available from Washington to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 30, 2025.

dom. 9/149:05 pmPDX - ISP

1 stop11h 55mSouthwest

jue. 9/186:00 amISP - PDX

1 stop13h 00mSouthwest

Deal found 7/29

$404

lun. 8/46:45 amSEA - ISP

2 stops10h 50mSouthwest

jue. 8/143:05 pmISP - SEA

2 stops12h 00mSouthwest

Deal found 7/30

$787

dom. 9/1412:07 pmPDX - ISP

3 stops29h 00mMultiple Airlines

jue. 9/187:36 pmISP - PDX

2 stops26h 28mMultiple Airlines

Deal found 7/29

$894

jue. 8/1411:59 pmSEA - ISP

3 stops34h 33mMultiple Airlines

lun. 8/187:30 amISP - SEA

2 stops18h 20mMultiple Airlines

Deal found 7/30

$1,123

Best flights from Washington to Islip
Discover carefully curated flight deals from Washington to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated julio 30, 2025.

dom. 9/149:05 pmPDX - ISP

1 stop11h 55mSouthwest

jue. 9/183:05 pmISP - PDX

2 stops11h 05mSouthwest

Deal found 7/29

$404

dom. 9/1412:07 pmPDX - ISP

3 stops29h 00mMultiple Airlines

jue. 9/187:36 pmISP - PDX

2 stops26h 28mMultiple Airlines

Deal found 7/29

$894

jue. 8/1411:59 pmSEA - ISP

3 stops34h 33mMultiple Airlines

lun. 8/187:30 amISP - SEA

2 stops18h 20mMultiple Airlines

Deal found 7/30

$1,123

Last-minute flights from Washington to Islip
Discover last-minute flight deals from Washington to Islip. Data last updated julio 30, 2025 and is based on user searches.

lun. 8/46:45 amSEA - ISP

2 stops10h 50mSouthwest

jue. 8/143:05 pmISP - SEA

2 stops12h 00mSouthwest

Deal found 7/30

$787

lun. 8/411:59 pmSEA - ISP

2 stops10h 25mMultiple Airlines

jue. 8/147:39 pmISP - SEA

3 stops42h 23mMultiple Airlines

Deal found 7/30

$1,227

jue. 8/1411:59 pmSEA - ISP

3 stops34h 33mMultiple Airlines

lun. 8/187:30 amISP - SEA

2 stops18h 20mMultiple Airlines

Deal found 7/30

$1,123

mar. 8/199:05 pmPDX - ISP

1 stop11h 50mSouthwest

mar. 8/266:05 amISP - PDX

1 stop10h 45mSouthwest

Deal found 7/29

$421

mar. 8/1911:59 pmPDX - ISP

2 stops17h 02mMultiple Airlines

mar. 8/267:30 amISP - PDX

3 stops16h 31mMultiple Airlines

Deal found 7/29

$940

One-way flights from Washington to Islip
Search for one-way flight options from Washington to Islip. Find affordable one-way fares based on user searches. Data last updated julio 30, 2025.

mié. 8/66:00 amPDX - ISP

2 stops12h 05mSouthwest

Deal found 7/29

$429

mié. 8/610:23 amPDX - ISP

3 stops44h 33mMultiple Airlines

Deal found 7/29

$576

dom. 8/2411:34 pmSEA - ISP

1 stop8h 24mMultiple Airlines

Deal found 7/30

$768

Fly from

Fly to

Route

Depart

Return

Price

PortlandIslip

PDX - ISP

PDXISP

Portland

dom. 9/14

9:05 pm-12:00 pm

1 stop11h 55m

Islip Long Island

jue. 9/18

3:05 pm-11:10 pm

2 stops11h 05m

$404

PortlandIslip

PDX - ISP

PDXISP

Portland

dom. 9/14

12:07 pm-8:07 pm

3 stops29h 00m

Islip Long Island

jue. 9/18

7:36 pm-7:04 pm

2 stops26h 28m

$894

SeattleIslip

SEA - ISP

SEAISP

Seattle/Tacoma Intl

jue. 8/14

11:59 pm-1:32 pm

3 stops34h 33m

Islip Long Island

lun. 8/18

7:30 am-10:50 pm

2 stops18h 20m

$1,123

PortlandIslip

PDX - ISP

PDXISP

Portland

mié. 8/6

6:00 am-9:05 pm

2 stops12h 05m

$429

PortlandIslip

PDX - ISP

PDXISP

Portland

mié. 8/6

10:23 am-9:56 am

3 stops44h 33m

$576

SeattleIslip

SEA - ISP

SEAISP

Seattle/Tacoma Intl

dom. 8/24

11:34 pm-10:58 am

1 stop8h 24m

$768

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Best time to book a flight from Washington to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Washington with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Islip

What is the cheapest month to book a flight from State of Washington to Islip, New York?

Currently, January is the cheapest month in which you can book a flight from State of Washington to Islip, New York (average of $108). Flying from State of Washington to Islip, New York in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Islip

Read through reviews of airlines operating flights from Washington to Islip, such as Southwest. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Southwest

8.0

Very good

4,241 reviews

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

Related info for your journey

What airport do you fly into for flights to Islip from Washington?
If you book a flight to Islip from Washington, you will be flying to Long Island, which is the city’s only airport. Islip Long Island (ISP) is located 7.2 mi from the center of Islip.
What are the most popular routes from State of Washington to Islip, New York?
Most travelers choose Portland - Islip Long Island, Pasco Tri Cities - Islip Long Island or Seattle/Tacoma Intl - Islip Long Island when deciding on the best route from State of Washington to Islip, New York.
Can I find deals for flights from Washington to Islip that include hotel bookings?
Yes. In addition to deals on Washington to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington to Islip?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Islip.
Can I find deals for business class flights from Washington to Islip?
Yes. Cheapflights offers flight deals from Washington to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from State of Washington to Islip, New York?
Currently, January is the cheapest month in which you can book a flight from State of Washington to Islip, New York (average of $108). Flying from State of Washington to Islip, New York in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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$404+ Cheap flights from Washington to Islip, NY (ISP)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington to Islip with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Washington to Islip

Keep the following information in mind while searching for Washington to Islip flight deals. Data was last updated julio 30, 2025.

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Washington to Islip

Cheapest flights from Washington to IslipExplore the most affordable flight options available from Washington to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 30, 2025.

Explore the most affordable flight options available from Washington to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 30, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington to Islip that are best for you.

Best time to book a flight from Washington to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Washington with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Washington to Islip

What is the cheapest month to book a flight from State of Washington to Islip, New York?

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Islip. Reviews last updated julio 30, 2025.

Read through reviews of airlines operating flights from Washington to Islip, such as Southwest. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Washington to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Islip from Washington?

What are the most popular routes from State of Washington to Islip, New York?

Can I find deals for flights from Washington to Islip that include hotel bookings?

How can I find direct flights from Washington to Islip?

Can I find deals for business class flights from Washington to Islip?

What is the cheapest month to book a flight from State of Washington to Islip, New York?

Traveling to a place near Islip?

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Alternative routes for Washington to Islip

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Cheapest flights from Washington to Islip
Explore the most affordable flight options available from Washington to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 30, 2025.