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

Most travelers choose Portland - Islip Long Island, Seattle/Tacoma Intl - Islip Long Island or Pasco Tri Cities - 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 100% 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 $652.

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 $232.

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.

$219+ Flights from Washington to Islip, NY

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Cheap flight deals from Washington to Islip

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$351 (Southwest)
One-way from	$219 (Southwest)
Popular in	December
Cheapest in	January
Average price	$357

Provider with most accurate pricing for Seattle/Tacoma Intl-New York (NYC) flight deals.

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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-New York (NYC) flights.

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From Washington to Islip Long Island

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One-way flight from Washington to Islip Long Island

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Highest demand for flights based on searches. 1% potential increase in price ($7 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

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Average for round-trip flights in March 2025

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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 March 31, 2025.

Thu 6/59:10 pmSEA - ISP

1 stop9h 15mSouthwest

Mon 6/910:00 amISP - SEA

1 stop10h 10mSouthwest

Deal found 3/30

$351

Mon 6/169:15 pmPDX - ISP

1 stop11h 45mSouthwest

Sat 6/2111:00 amISP - PDX

2 stops12h 35mSouthwest

Deal found 3/30

$460

Mon 3/3111:15 amPDX - ISP

3 stops47h 40mMultiple Airlines

Thu 4/310:50 amISP - PDX

2 stops34h 05mMultiple Airlines

Deal found 3/30

$1,461

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 March 31, 2025.

Thu 6/59:10 pmSEA - ISP

1 stop9h 15mSouthwest

Mon 6/910:00 amISP - SEA

1 stop10h 10mSouthwest

Deal found 3/30

$351

Mon 6/169:15 pmPDX - ISP

1 stop11h 45mSouthwest

Sat 6/2111:00 amISP - PDX

2 stops12h 35mSouthwest

Deal found 3/30

$460

Last-minute flights from Washington to Islip
Discover last-minute flight deals from Washington to Islip. Data last updated March 31, 2025 and is based on user searches.

Mon 3/318:35 amPDX - ISP

2 stops10h 55mSouthwest

Thu 4/310:20 amISP - PDX

2 stops9h 50mSouthwest

Deal found 3/30

$1,037

Mon 3/3111:15 amPDX - ISP

3 stops47h 40mMultiple Airlines

Thu 4/310:50 amISP - PDX

2 stops34h 05mMultiple Airlines

Deal found 3/30

$1,461

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 March 31, 2025.

Fri 7/47:20 amPDX - ISP

2 stops9h 50mSouthwest

Deal found 3/30

$219

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

SeattleIslip

SEA - ISP

SEAISP

Seattle/Tacoma Intl

Thu 6/5

9:10 pm-9:25 am

1 stop9h 15m

Islip Long Island

Mon 6/9

10:00 am-5:10 pm

1 stop10h 10m

$351

PortlandIslip

PDX - ISP

PDXISP

Portland

Mon 6/16

9:15 pm-12:00 pm

1 stop11h 45m

Islip Long Island

Sat 6/21

11:00 am-8:35 pm

2 stops12h 35m

$460

PortlandIslip

PDX - ISP

PDXISP

Portland

Fri 7/4

7:20 am-8:10 pm

2 stops9h 50m

$219

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

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.

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.

Rainfall in Islip by month

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.

Temperature in Islip by month

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).

Reviews of airlines servicing Islip

Southwest

8.0

Very good

4,276 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Southwest

8.0

Very good

4,276 reviews

Southwest

8.0

Very good

4,276 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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, Seattle/Tacoma Intl - Islip Long Island or Pasco Tri Cities - 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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$219+ Cheap flights from Washington to Islip, NY (ISP)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/4. 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 March 31, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way 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 March 31, 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 March 31, 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?

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

Find hourly flight availability from Washington to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 31, 2025.

Rainfall in Islip by month

Plan your trip to Islip by taking into account the average rainfall totals by month.

Temperature in Islip by month

Plan your trip to Islip by taking into account the average temperature totals by month.

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 March 31, 2025.

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?

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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 March 31, 2025.