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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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — ISP
Jan 22 — Jan 291
Wed 1/22
Wed 1/29
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 January 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$117
(Mytrip)

One-way from

$66
(FlightHub)

Popular in

June

Cheapest in

July

Average price

$459
Provider with most accurate pricing for Washington, D.C. (WAS)-Islip Long Island flight deals.
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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
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One-way flight from Washington, D.C. (WAS) to Islip Long Island
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High demand for flights, 18% potential price rise
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Best time to find cheap flights, 10% potential price drop
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Average for round-trip flights in January 2025
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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 January 17, 2025.

This Mytrip deal was found by Cheapflights users on 1/15. 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.
Tue 2/255:45 pmIAD - ISP
1 stop14h 56mFrontier
Thu 2/272:53 pmISP - IAD
1 stop6h 32mFrontier
Deal found 1/15$117
This FlightHub deal was found by Cheapflights users on 1/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/1110:10 amBWI - ISP
1 stop22h 31mFrontier
Wed 2/269:04 pmISP - BWI
1 stop10h 17mFrontier
Deal found 1/16$120
This JetBlue deal was found by Cheapflights users on 1/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/142:30 pmDCA - ISP
1 stop6h 38mJetBlue
Wed 5/216:00 amISP - DCA
1 stop4h 43mJetBlue
Deal found 1/15$195
This Mytrip deal was found by Cheapflights users on 1/16. 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 2/266:45 amBWI - ISP
3 stops29h 31mMultiple Airlines
Thu 2/277:25 pmISP - BWI
2 stops22h 36mMultiple Airlines
Deal found 1/16$310
This Southwest deal was found by Cheapflights users on 1/16. 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.
Mon 2/249:40 amBWI - ISP
Nonstop1h 10mSouthwest
Mon 2/245:45 pmISP - BWI
Nonstop1h 20mSouthwest
Deal found 1/16$319
This Southwest deal was found by Cheapflights users on 1/15. 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.
Mon 4/141:15 pmDCA - ISP
1 stop9h 15mSouthwest
Fri 4/185:00 amISP - DCA
1 stop6h 10mSouthwest
Deal found 1/15$417

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 January 17, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Tue 2/25

5:45 pm-8:41 am

1 stop14h 56m

Islip Long Island

Thu 2/27

2:53 pm-9:25 pm

1 stop6h 32m

$117

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Thu 1/30

3:22 pm-7:54 am

1 stop16h 32m

Islip Long Island

Mon 2/3

11:48 am-9:10 am

1 stop21h 22m

$120

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Thu 1/30

5:38 pm-1:16 pm

2 stops19h 38m

Islip Long Island

Mon 2/3

5:20 pm-2:35 pm

2 stops21h 15m

$265

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Fri 2/14

9:15 am-10:30 am

Nonstop1h 15m

Islip Long Island

Sun 2/16

12:50 pm-2:15 pm

Nonstop1h 25m

$319

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Mon 4/14

1:15 pm-10:30 pm

1 stop9h 15m

Islip Long Island

Fri 4/18

5:00 am-11:10 am

1 stop6h 10m

$417

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Wed 3/12

11:30 am-8:16 pm

1 stop8h 46m

Islip Long Island

Fri 3/14

1:34 pm-10:56 pm

1 stop9h 22m

$692

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Sat 2/8

8:31 pm-9:53 am

1 stop13h 22m

$61

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sun 2/2

5:57 pm-10:48 am

1 stop16h 51m

$76

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Wed 2/12

8:08 pm-12:16 pm

2 stops16h 08m

$124

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Sat 2/15

11:10 am-12:20 pm

Nonstop1h 10m

$160

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Showing 1-10 of 11 results
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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 February is currently the most expensive (average of $220). 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 January 17, 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 January 17, 2025.
Peruse reviews from past customers who have flown with Frontier and Southwest 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
4,659 reviews

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,659 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,199 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Frontier
6.1
Okay
3,435 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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.

  • How popular is this Washington, D.C. to Islip, New York flight route?

    Flights from Washington, D.C. to Islip Long Island have been viewed 2 times in the past calendar month.

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

    Currently priced at $117, 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 Southwest and JetBlue - these airlines can fly you to your destination from $319 and $692, respectively. These flights start at 70% lower than the current average price 3 months from now.

  • 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 Baltimore/Washington - Islip Long Island, Washington, D.C. Reagan-National - Islip Long Island or Washington, D.C. Dulles Intl - Islip Long Island as they are the most popular.

  • What are the cheapest flights from Washington, D.C. to Islip, New York?

    Looking at all options, your cheapest flight can be booked for $174. While the most popular route (Baltimore/Washington - Islip Long Island) can be booked for $319 on average our data indicates $322 when flying from Washington, D.C. to Islip, New York.

  • 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 February is currently the most expensive (average of $220). 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 January 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$233Average$376FlexibilityNo cancel feeOn-time63%
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