$196+ Cheap flights from Seattle to Islip, NY (SEA - 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Seattle to Islip with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Islip
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Islip (ISP). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 14, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 2 stars |
Round-trip from | $356 (Southwest) |
One-way from | $196 (Southwest) |
Popular in | December |
Cheapest in | January |
Average price | $417 |
Find flight deals from Seattle to Islip
Cheapest flights from Seattle to IslipExplore the most affordable flight options available from Seattle to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 14, 2025.
Explore the most affordable flight options available from Seattle to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 14, 2025.
This Southwest deal was found by Cheapflights users on 5/14. 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.
This Mytrip deal was found by Cheapflights users on 5/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Islip 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 May 14, 2025.
Use the filters below to find and compare flights from Seattle to Islip that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
SeattleIslip
SEA - ISP
SEAISP
Seattle/Tacoma Intl
Wed 6/25
9:10 pm-9:25 am
1 stop9h 15m
Islip Long Island
Tue 7/1
4:40 pm-12:30 am
2 stops10h 50m
SeattleIslip
SEA - ISP
SEAISP
Seattle/Tacoma Intl
Thu 5/29
3:20 pm-3:19 pm
3 stops20h 59m
Islip Long Island
Mon 6/2
10:44 am-12:10 am
3 stops40h 26m
SeattleIslip
SEA - ISP
SEAISP
Seattle/Tacoma Intl
Mon 9/8
11:10 pm-3:10 pm
2 stops13h 00m
SeattleIslip
SEA - ISP
SEAISP
Seattle/Tacoma Intl
Thu 7/24
11:59 pm-6:45 pm
3 stops39h 46m
- Most accurate provider: When it comes to deals on Seattle-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Islip, New York flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Islip, New York flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Islip, New York flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Seattle to Islip
Have a flexible travel schedule? Discover the best time to fly to Islip from Seattle with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Islip
What is the cheapest month to book a flight from Seattle to Islip, New York?
Currently, January is the cheapest month in which you can book a flight from Seattle to Islip, New York (average of $108). Flying from Seattle 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 SEA to ISP?
Find hourly flight availability from Seattle 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 May 14, 2025.
When flying from Seattle 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
Plan your trip to Islip by taking into account the average rainfall totals 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
Plan your trip to Islip by taking into account the average temperature totals 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
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 May 14, 2025.
Crew
Food
Entertainment
Overall
Comfort
Boarding
Reviews
Gina,Apr 2025
LAS - DEN
Crew
Food
Entertainment
Overall
Comfort
Boarding
Reviews
Gina,Apr 2025
LAS - DEN