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 $211, 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 $257 and $262, respectively. These flights start at 44% 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?

$79 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 $89 and $118, respectively.

What is the cheapest day to fly from Washington, D.C. to Islip, New York?

Travelers seeking maximum savings on their Washington, D.C. to Islip, New York flight should consider departing on Tuesday mornings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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, Washington, D.C. Dulles Intl - Islip Long Island or Baltimore/Washington - 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 $89. While the most popular route (Washington, D.C. Reagan-National - Islip Long Island) can be booked for $215 on average our data indicates $245 when flying from Washington, D.C. to Islip, New York.

What is the cheapest day to fly round-trip from Washington, D.C. to Islip, New York?

Users have found that flying from Washington, D.C. to Islip, New York on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from Washington, D.C. to Islip, New York?

Find a great deal and save up to 213% by booking at least 59 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Washington, D.C. to Islip, New York within the next two weeks, with the cheapest ticket starting at $293.

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

Flights from Washington, D.C. to Islip, New York lean towards being more expensive in December. Prices are generally better when you fly from Washington, D.C. to Islip, New York in April, with the cheapest ticket starting at $91.

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 eDreams the most. eDreams 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.

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.

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.

$79+ Flights from Washington, D.C. to Islip, NY

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1. Tell us where you want to go

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Cheap flight deals from Washington, D.C. to Islip

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$211 (Frontier)
One-way from	$79 (Cheapflightsfares)
Popular in	January
Cheapest in	May
Average price	$285
Good round-trip deal	$261 or less
Good one-way deal	$117 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. 15% potential increase in price ($71 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

Search Deals

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.

Search Deals

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 April 15, 2025.

Fri 6/61:34 pmIAD - ISP

1 stop6h 07mFrontier

Sun 6/88:51 amISP - IAD

1 stop8h 21mFrontier

Deal found 4/15

$211

Thu 6/267:25 pmBWI - ISP

Nonstop1h 10mSouthwest

Fri 7/43:50 pmISP - BWI

Nonstop1h 15mSouthwest

Deal found 4/15

$257

Wed 5/2110:00 amDCA - ISP

1 stop6h 50mJetBlue

Thu 5/226:00 amISP - DCA

1 stop5h 00mJetBlue

Deal found 4/15

$262

Wed 7/301:20 pmDCA - ISP

1 stop8h 25mSouthwest

Sun 8/101:55 pmISP - DCA

2 stops8h 50mSouthwest

Deal found 4/15

$402

Thu 6/58:25 amIAD - ISP

1 stop26h 54mMultiple Airlines

Sun 6/88:26 pmISP - IAD

1 stop16h 23mMultiple Airlines

Deal found 4/15

$414

Fri 5/307:57 pmBWI - ISP

2 stops17h 48mMultiple Airlines

Sun 6/17:39 pmISP - BWI

2 stops21h 25mMultiple Airlines

Deal found 4/15

$432

Best flights from Washington, D.C. to Islip
Discover carefully curated flight deals from Washington, D.C. to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 15, 2025.

Fri 6/61:34 pmIAD - ISP

1 stop6h 07mFrontier

Sun 6/88:51 amISP - IAD

1 stop8h 21mFrontier

Deal found 4/15

$211

Thu 6/267:25 pmBWI - ISP

Nonstop1h 10mSouthwest

Fri 7/43:50 pmISP - BWI

Nonstop1h 15mSouthwest

Deal found 4/15

$257

Wed 5/2110:00 amDCA - ISP

1 stop6h 50mJetBlue

Thu 5/226:00 amISP - DCA

1 stop5h 00mJetBlue

Deal found 4/15

$262

Thu 6/58:25 amIAD - ISP

1 stop26h 54mMultiple Airlines

Sun 6/88:26 pmISP - IAD

1 stop16h 23mMultiple Airlines

Deal found 4/15

$414

Wed 7/301:20 pmDCA - ISP

1 stop8h 25mSouthwest

Sun 8/101:55 pmISP - DCA

2 stops8h 50mSouthwest

Deal found 4/15

$402

Fri 5/307:57 pmBWI - ISP

2 stops17h 48mMultiple Airlines

Sun 6/17:39 pmISP - BWI

2 stops21h 25mMultiple Airlines

Deal found 4/15

$432

Last-minute flights from Washington, D.C. to Islip
Discover last-minute flight deals from Washington, D.C. to Islip. Data last updated April 15, 2025 and is based on user searches.

Wed 4/164:29 pmIAD - ISP

1 stop20h 49mMultiple Airlines

Sat 4/1911:42 amISP - IAD

1 stop26h 13mMultiple Airlines

Deal found 4/15

$793

Fri 4/257:10 pmBWI - ISP

Nonstop1h 10mSouthwest

Sun 4/276:25 pmISP - BWI

Nonstop1h 15mSouthwest

Deal found 4/15

$397

Fri 4/259:32 pmBWI - ISP

2 stops16h 23mMultiple Airlines

Sun 4/2710:50 amISP - BWI

3 stops36h 00mMultiple Airlines

Deal found 4/15

$572

Wed 5/2110:00 amDCA - ISP

1 stop6h 50mJetBlue

Thu 5/226:00 amISP - DCA

1 stop5h 00mJetBlue

Deal found 4/15

$262

Fri 5/305:52 pmIAD - ISP

1 stop26h 50mFrontier

Sun 6/18:26 pmISP - IAD

1 stop16h 23mFrontier

Deal found 4/15

$212

Fri 5/3010:00 amBWI - ISP

Nonstop1h 10mSouthwest

Sun 6/15:45 amISP - BWI

Nonstop1h 15mSouthwest

Deal found 4/15

$284

Fri 5/301:15 pmDCA - ISP

1 stop9h 15mSouthwest

Sun 6/14:20 pmISP - DCA

1 stop6h 15mSouthwest

Deal found 4/15

$412

Fri 5/307:57 pmBWI - ISP

2 stops17h 48mMultiple Airlines

Sun 6/17:39 pmISP - BWI

2 stops21h 25mMultiple Airlines

Deal found 4/15

$432

One-way flights from Washington, D.C. to Islip
Search for one-way flight options from Washington, D.C. to Islip. Find affordable one-way fares based on user searches. Data last updated April 15, 2025.

Thu 5/159:14 amIAD - ISP

1 stop6h 19mFrontier

Deal found 4/15

$79

Tue 5/611:15 amBWI - ISP

Nonstop1h 10mSouthwest

Deal found 4/15

$89

Tue 5/205:40 pmDCA - ISP

1 stop3h 48mJetBlue

Deal found 4/15

$118

Sat 5/106:55 amDCA - ISP

1 stop6h 25mSouthwest

Deal found 4/14

$141

Sat 6/76:41 amBWI - ISP

2 stops26h 01mMultiple Airlines

Deal found 4/15

$179

Wed 6/1112:40 pmIAD - ISP

2 stops30h 24mMultiple Airlines

Deal found 4/15

$229

Sun 6/18:25 amIAD - ISP

1 stop26h 54mBreeze Airways

Deal found 4/15

$275

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Wed 5/14

8:00 am-9:10 am

Nonstop1h 10m

Islip Long Island

Wed 5/21

8:20 am-9:35 am

Nonstop1h 15m

$197

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 6/6

1:34 pm-7:41 pm

1 stop6h 07m

Islip Long Island

Sun 6/8

8:51 am-5:12 pm

1 stop8h 21m

$211

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Wed 5/21

10:00 am-4:50 pm

1 stop6h 50m

Islip Long Island

Thu 5/22

6:00 am-11:00 am

1 stop5h 00m

$262

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Wed 7/30

1:20 pm-9:45 pm

1 stop8h 25m

Islip Long Island

Sun 8/10

1:55 pm-10:45 pm

2 stops8h 50m

$402

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 6/5

8:25 am-11:19 am

1 stop26h 54m

Islip Long Island

Sun 6/8

8:26 pm-12:49 pm

1 stop16h 23m

$414

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Fri 5/30

7:57 pm-1:45 pm

2 stops17h 48m

Islip Long Island

Sun 6/1

7:39 pm-5:04 pm

2 stops21h 25m

$432

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 5/15

9:14 am-3:33 pm

1 stop6h 19m

$79

BaltimoreIslip

BWI - ISP

BWIISP

Baltimore/Washington

Thu 5/15

9:55 pm-11:05 pm

Nonstop1h 10m

$89

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Tue 5/20

5:40 pm-9:28 pm

1 stop3h 48m

$118

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Sat 5/10

6:55 am-1:20 pm

1 stop6h 25m

$141

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 13 results

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

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 April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust 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 eDreams the most. eDreams 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.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Islip

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?

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

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

Breeze Airways

8.1

Very good

158 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Breeze Airways

8.1

Very good

158 reviews

Breeze Airways

8.1

Very good

158 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Southwest

8.0

Very good

4,279 reviews

Breeze Airways

8.1

Very good

158 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

JetBlue

7.3

Good

2,927 reviews

Breeze Airways

8.1

Very good

158 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Frontier

6.0

Okay

3,281 reviews

Breeze Airways

8.1

Very good

158 reviews

Reviews

1 / 11

10.0

Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Related info for your journey

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 $211, 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 $257 and $262, respectively. These flights start at 44% 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?
$79 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 $89 and $118, 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, Washington, D.C. Dulles Intl - Islip Long Island or Baltimore/Washington - 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 $89. While the most popular route (Washington, D.C. Reagan-National - Islip Long Island) can be booked for $215 on average our data indicates $245 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 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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Top airline flying from Washington, D.C. to Islip

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$260	Average$353	FlexibilityNo cancel fee	On-time63%

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$79+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington, D.C. 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, D.C. to Islip

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One-way from

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Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Washington, D.C. to Islip

Cheapest flights from Washington, D.C. to IslipExplore 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 April 15, 2025.

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 April 15, 2025.

Cheapflights Fare Finder

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

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 April.

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.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Islip

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

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 April 15, 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 April 15, 2025.

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.?

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

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

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

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

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

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

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

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

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

Traveling to a place near Washington, D.C.?

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Alternative routes for Washington, D.C. to Islip

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Top airline flying from Washington, D.C. to Islip

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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 April 15, 2025.