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Islip

$61+ Cheap flights from Washington, D.C. (WAS) 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — ISP
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) 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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$139
(Mytrip)

One-way from

$61
(Frontier)

Popular in

June

Cheapest in

April

Average price

$330

Good round-trip deal

$319 or less

Good one-way deal

$137 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Islip Long Island flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Islip Long Island flights.
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From Washington, D.C. (WAS) to Islip Long Island
Search Deals
One-way flight from Washington, D.C. (WAS) to Islip Long Island
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($102 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from Washington, D.C. (WAS) to Islip Long Island.
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Price to beat on a one-way flight from Washington, D.C. (WAS) to Islip Long Island.
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Find flight deals from Washington, D.C. to Islip

Cheapest flights from Washington, D.C. to Islip
Explore the most affordable flight options available from Washington, D.C. to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This Mytrip deal was found by Cheapflights users on 2/19. 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.
Fri 5/99:21 pmBWI - ISP
1 stop12h 39mFrontier
Sun 5/119:40 pmISP - BWI
1 stop14h 33mFrontier
Deal found 2/19$139
This Gotogate deal was found by Cheapflights users on 2/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/410:50 amIAD - ISP
1 stop9h 19mFrontier
Sun 4/68:44 pmISP - IAD
1 stop19h 04mFrontier
Deal found 2/20$179
This JetBlue Airways deal was found by Cheapflights users on 2/19. 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 JetBlue Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/214:15 pmDCA - ISP
1 stop4h 53mJetBlue
Thu 5/226:00 amISP - DCA
1 stop4h 37mJetBlue
Deal found 2/19$231
This Mytrip deal was found by Cheapflights users on 2/18. 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.
Wed 3/512:00 pmBWI - ISP
2 stops22h 11mMultiple Airlines
Sun 3/912:56 pmISP - BWI
2 stops36h 01mMultiple Airlines
Deal found 2/18$255
This Southwest deal was found by Cheapflights users on 2/19. 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 5/810:00 amBWI - ISP
Nonstop1h 10mSouthwest
Sun 5/1110:25 amISP - BWI
Nonstop1h 15mSouthwest
Deal found 2/19$282
This Southwest deal was found by Cheapflights users on 2/20. 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.
Fri 4/41:20 pmDCA - ISP
2 stops9h 10mSouthwest
Sun 4/612:55 pmISP - DCA
1 stop7h 25mSouthwest
Deal found 2/20$402
This Mytrip deal was found by Cheapflights users on 2/20. 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.
Fri 2/2112:55 pmIAD - ISP
3 stops25h 00mMultiple Airlines
Wed 2/2611:42 amISP - IAD
1 stop26h 13mMultiple Airlines
Deal found 2/20$464

Find flights from Washington, D.C. to Islip within your budget

Customize your flight search to find flights from Washington, D.C. 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 February 20, 2025.

Fly from

Washington, D.C.

Fly to

Islip

Route

Depart

Return

Price

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Fri 5/9

9:21 pm-10:00 am

1 stop12h 39m

Islip Long Island

Sun 5/11

9:40 pm-12:13 pm

1 stop14h 33m

$139

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 4/4

10:50 am-8:09 pm

1 stop9h 19m

Islip Long Island

Sun 4/6

8:44 pm-3:48 pm

1 stop19h 04m

$179

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Wed 5/21

4:15 pm-9:08 pm

1 stop4h 53m

Islip Long Island

Thu 5/22

6:00 am-10:37 am

1 stop4h 37m

$231

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Wed 3/5

12:00 pm-10:11 am

2 stops22h 11m

Islip Long Island

Sun 3/9

12:56 pm-12:57 am

2 stops36h 01m

$255

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Thu 5/8

10:00 am-11:10 am

Nonstop1h 10m

Islip Long Island

Sun 5/11

10:25 am-11:40 am

Nonstop1h 15m

$282

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Fri 4/4

1:20 pm-10:30 pm

2 stops9h 10m

Islip Long Island

Sun 4/6

12:55 pm-8:20 pm

1 stop7h 25m

$402

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 4/4

12:55 pm-1:55 pm

3 stops25h 00m

Islip Long Island

Sun 4/6

10:50 am-11:07 am

3 stops24h 17m

$737

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Tue 3/18

8:21 am-8:04 pm

1 stop11h 43m

$61

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Wed 3/12

6:00 am-12:16 pm

3 stops30h 16m

$109

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Wed 3/5

11:00 am-12:10 pm

Nonstop1h 10m

$123

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 14 results
1
2

Compare providers for flights from Washington, D.C. to Islip

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Islip in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C.-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 Washington, D.C.-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Islip, New York flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-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 Washington, D.C.-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 Washington, D.C. to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Washington, D.C. 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.

Travel insights for flights from Washington, D.C. to Islip

Get recent, data-driven insights about flights from Washington, D.C. to Islip including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Washington, D.C. to Islip, New York?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Islip, New York (average of $108). Flying from Washington, D.C. 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 WAS to ISP?

Find hourly flight availability from Washington, D.C. 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 February 20, 2025.

When flying from Washington, D.C. to Islip, New York, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 11% versus a flight in the morning.

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 February 20, 2025.
Peruse reviews from past customers who have flown with Southwest, Breeze Airways and JetBlue from Washington, D.C. to Islip to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Breeze Airways
8.1
Very good
150 reviews
Southwest
8.1
Very good
4,411 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

JetBlue
7.4
Good
3,070 reviews
Southwest
8.1
Very good
4,411 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Frontier
6.0
Okay
3,355 reviews
Southwest
8.1
Very good
4,411 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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, D.C.?

    Located just 7.2 mi from the city center, Islip Long Island is the airport most travelers will use when flying to Islip from Washington, D.C.. Booking flights from Washington, D.C. to Long Island (ISP) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. from 1 airline.

  • What are the cheapest airlines flying from Washington, D.C. to Islip, New York round-trip?

    Currently priced at $139, Frontier will fly you from Washington, D.C. to Islip, New York and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from JetBlue and Southwest - these airlines can fly you to your destination from $231 and $282, respectively. These flights start at 66% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Washington, D.C. to Islip, New York one-way?

    $61 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Southwest and JetBlue, with prices starting from $123 and $198, respectively.

  • What are the most popular routes from Washington, D.C. to Islip, New York?

    When deciding which route to take from Washington, D.C. to Islip, New York consider Washington, D.C. Reagan-National - Islip Long Island, Baltimore/Washington - Islip Long Island or Washington, D.C. Dulles Intl - Islip Long Island as they are the most popular.

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

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

  • How can I find direct flights from Washington, D.C. to Islip?

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

  • Can I find deals for business class flights from Washington, D.C. to Islip?

    Yes. Cheapflights offers flight deals from Washington, D.C. 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 Washington, D.C. to Islip, New York?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Islip, New York (average of $108). Flying from Washington, D.C. 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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Alternative routes for Washington, D.C. to Islip

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Washington, D.C. to Islip

Discover the top airline that operate flights from Washington, D.C. to Islip. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$256Average$376FlexibilityNo cancel feeOn-time63%
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