Find Cheap Flights from Washington to Islip Long Island (WAS - ISP)

Search hundreds of travel sites at once for deals on flights to Islip Long Island

Fri 12/15
Fri 12/22
Any month
Compare vs. KAYAK |

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $207 or less.

FAQs for Booking Washington to Islip Long Island Flights

How long does a flight from Washington to Islip Long Island take?
An average nonstop flight takes 4h 08m, covering a distance of 247 miles.
How many flights are there between Washington and Islip Long Island?
There are 91 (nonstop) flights between Washington and Islip Long Island per week, averaging 13 per day.
Which airlines provide the cheapest flights from Washington to Islip Long Island?
In the past 3 days, the cheapest round-trip tickets were found on American Airlines ($144) and Frontier ($208)
Do I need a passport to fly between Washington and Islip Long Island?
No.
Which airlines fly most frequently between Washington and Islip Long Island?
Southwest (13 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Washington to Islip Long Island?
For Washington to Islip Long Island, Saturday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Islip Long Island back to Washington, the best deals are generally found on Monday, with Friday being the most expensive.

Book cheap flights from Washington to Islip Long Island (round-trip)

Airports
Origin
Washington
$208
only
$208
$144
only
$144
Destination
Islip
$144
only
$144
Sat, Jan 13
DCA
ISP
4h 24m
Tue, Feb 6
ISP
DCA
3h 07m
Trip: 25 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 26019 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
LHR
ORD
Excellent 8.0

The staff were nice and helpful.

Internet sucks

TUS
PHX
Mediocre 2.0

Nothing.

Everything.

ABQ
ORD
Excellent 8.0

everything fine

having to gate-check our hand luggage

CLT
SJU
Mediocre 3.3

Direct flight

Horrible customer service, excessive baggage fees, rude counter staff, no leg room, narrow seats

AUS
CLT
Excellent 10.0

My Mom was very grateful for the friendly assistance as she is wheelchair bound and was flying aline. Excellent service!!

Nothing.

Sat, Jan 6
IAD
ISP
7h 03m
Sun, Jan 7
ISP
IAD
16h 24m
Trip: 2 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33263 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MSY
MCO
Excellent 10.0

Great crew great flight

Nothing, everything was awesome. Crazy to believe this was a 19 dollar flight

IAD
LAS
Good 6.3

They gave me and someone else the same seat luckily it wasn’t a packed flight and was able to move to a row that was empty

ATL
DEN
Mediocre 3.6

The price was good, and it was a non stop flight.

The crew was rude and the seats didn't recline.

AUS
LAS
Excellent 8.0

Efficient

N/a

DEN
SFO
Mediocre 2.0

Website would not let me check in the day before or the morning or my flight. There was an error every time and I almost got to the end once. I could not change the time of my transportation and arrived 10 minutes past the check in deadline (an hour prior to the flight taking off). I was refused access to the flight and offered a flight 5 hours later. The staff was rude and not helpful. I had heard negative things about Frontier and now I know why.

Sat, Feb 10
DCA
ISP
4h 24m
Mon, Feb 12
ISP
DCA
4h 30m
Trip: 3 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 26019 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
MCO
MIA
Mediocre 2.0

Flight got canceled for over a week.

AUS
CLT
Excellent 10.0

My Mom was very grateful for the friendly assistance as she is wheelchair bound and was flying aline. Excellent service!!

Nothing.

HPN
DCA
Mediocre 2.0

Nothing

Comfort, timeliness.

JFK
MIA
Excellent 8.8

Almost everything. Only the food was lacking. I like their new planes. The outlet at the seat in coach. The magazine options at the seat as well. I did not look at the entertainment so I will not rate that. The crew was professional.

Just the food options. Ginger snaps was what was served for food and a beverage. I suppose this is what obtains on most airlines these days but can't I hope for something more like maybe a sandwich? AA has the opportunity to set themselves apart in this area.

TUS
PHX
Mediocre 2.0

Nothing.

Everything.

Tue, Dec 26
DCA
ISP
4h 08m
Fri, Dec 29
ISP
DCA
4h 29m
Trip: 4 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 26019 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
AUS
CLT
Excellent 10.0

My Mom was very grateful for the friendly assistance as she is wheelchair bound and was flying aline. Excellent service!!

Nothing.

HPN
DCA
Mediocre 2.0

Nothing

Comfort, timeliness.

LHR
ORD
Excellent 8.0

The staff were nice and helpful.

Internet sucks

MCO
MIA
Mediocre 2.0

Flight got canceled for over a week.

JFK
MIA
Excellent 8.8

Almost everything. Only the food was lacking. I like their new planes. The outlet at the seat in coach. The magazine options at the seat as well. I did not look at the entertainment so I will not rate that. The crew was professional.

Just the food options. Ginger snaps was what was served for food and a beverage. I suppose this is what obtains on most airlines these days but can't I hope for something more like maybe a sandwich? AA has the opportunity to set themselves apart in this area.

Thu, Feb 8
IAD
ISP
7h 03m
Fri, Feb 9
ISP
IAD
16h 24m
Trip: 2 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33263 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
PHL
MCO
Mediocre 2.3

Its a scam! They act like they are giving you a break by having you buy cheap flights but in reality it costs more than a bit more expensive flight. I had to pay $45.00 each bag no matter if it was checked or carry-on. In total round trip I paid $180.00 extra just for my husbands carry-on as well as mine. Must add that our flights together cost 286.00. We should of went with American Airlines. On top of that we couldn't select our own seat if so, we had to pay extra, so we had to sit separated from each other. It was ridiculous! Never Again with this company!!!!!

DEN
MKE
Good 6.6

Direct flight from Denver to Milwaukee. Didn't have to wait on tarmac so that was a plus.

Have to pay for every little thring down to the peanuts

TYS
MCO
Okay 5.0

Great people

The plane wasn’t very clean

ATL
DEN
Mediocre 3.6

The price was good, and it was a non stop flight.

The crew was rude and the seats didn't recline.

AUS
LAS
Excellent 8.0

Efficient

N/a

Sun, Dec 17
DCA
ISP
4h 08m
Tue, Dec 19
ISP
DCA
3h 06m
Trip: 3 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 26019 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
TPA
ORD
Excellent 8.0

Average. Expectation for US airlines are so low this flight score average.

CLT
SJU
Mediocre 3.3

Direct flight

Horrible customer service, excessive baggage fees, rude counter staff, no leg room, narrow seats

LHR
ORD
Excellent 8.0

The staff were nice and helpful.

Internet sucks

AUS
CLT
Excellent 10.0

My Mom was very grateful for the friendly assistance as she is wheelchair bound and was flying aline. Excellent service!!

Nothing.

ATL
CLT
Excellent 9.6

The flight was late

Sun, Dec 31
IAD
ISP
5h 58m
Thu, Jan 4
ISP
IAD
5h 52m
Trip: 5 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 26019 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
GIG
JFK
Okay 4.6

Nice crew

I booked a LATAM flight for a 10.5 hour flight specifically because they have better in flight entertainment. I arrived at the airport and found it it was operated by AA. 10.5 hours with zero in flight entertainment. HORRIBLE EXPERIENCE.

ABQ
ORD
Excellent 8.0

everything fine

having to gate-check our hand luggage

HPN
DCA
Mediocre 2.0

Nothing

Comfort, timeliness.

TPA
ORD
Excellent 8.0

Average. Expectation for US airlines are so low this flight score average.

TUS
PHX
Mediocre 2.0

Nothing.

Everything.

*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

^
The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.