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$452+ Cheap flights from Islip, NY (ISP) to Washington

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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SEA
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheap flight deals from Islip to Washington

Keep the following information in mind while searching for Islip to Washington flight deals. Data was last updated March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$482
(Southwest)

One-way from

$452
(JetBlue)

Popular in

December

Cheapest in

September

Average price

$377
Provider with most accurate pricing for New York (NYC)-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for New York (NYC)-Seattle/Tacoma Intl flights.
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From Islip Long Island to Washington
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One-way flight from Islip Long Island to Washington
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Highest demand for flights based on searches. 4% potential increase in price ($19 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 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 Islip to Washington

Cheapest flights from Islip to Washington
Explore the most affordable flight options available from Islip to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

This Southwest deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1210:00 amISP - SEA
2 stops12h 15mSouthwest
Thu 6/199:10 pmSEA - ISP
1 stop9h 15mSouthwest
Deal found 3/27$482

Cheapflights Fare Finder

Customize your flight search to find flights from Islip to Washington 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, Cheapflights users made 2,558,603 searches. Data last updated March 28, 2025.
Use the filters below to find and compare flights from Islip to Washington that are best for you.

Fly from

Islip

Fly to

Washington

Route

Depart

Return

Price

IslipSeattle

ISP - SEA

ISPSEA

Islip Long Island

Thu 6/12

10:00 am-7:15 pm

2 stops12h 15m

Seattle/Tacoma Intl

Thu 6/19

9:10 pm-9:25 am

1 stop9h 15m

$482

IslipPortland

ISP - PDX

ISPPDX

Islip Long Island

Mon 5/12

6:00 am-1:12 pm

1 stop10h 12m

$452

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Best time to book a flight from Islip to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Islip 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 Islip to Washington

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

Currently, January is the cheapest month in which you can book a flight from Islip, New York to State of Washington (average of $238). Flying from Islip, New York to State of Washington in July is currently the most expensive (average of $411). 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.

Rainfall in Washington by month

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

In terms of precipitation, rainfall in State of Washington ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit State of Washington when rainfall is around 0.7 in.

Temperature in Washington by month

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

If weather is an important factor for your trip to State of Washington, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated March 28, 2025.
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Food

7.1

Entertainment

7.6

Overall

8.1

Comfort

8.1

Boarding

8.2

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
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Food

7.1

Entertainment

7.6

Overall

8.1

Comfort

8.1

Boarding

8.2

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.
JetBlue
7.3
Good
2,923 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Food

7.1

Entertainment

7.6

Overall

8.1

Comfort

8.1

Boarding

8.2

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

Find useful and relevant information for your journey from Islip to Washington. 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 from for flights from Islip to Washington?

    Most people fly from Islip Long Island (ISP) if they book a flight from Islip to Washington. Islip Long Island is conveniently located just 7.2 mi from Islip’s city center.

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

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

  • How can I find direct flights from Islip to Washington?

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

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

    Yes. Cheapflights offers flight deals from Islip to Washington 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 Islip, New York to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from Islip, New York to State of Washington (average of $238). Flying from Islip, New York to State of Washington in July is currently the most expensive (average of $411). 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.

See more FAQs

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