Find Deals on Flights from Islip Long Island to Washington Dulles Intl (ISP - IAD)

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Islip Long Island to Washington Dulles Intl

(Round-trip)
Depart: Wed May 18 2016 Return: Thu May 19 2016 Trip spans 2 days
Major Airline
Major Airline
ISP
10:30a
IAD
3:18a
16h 48m
1 stop
IAD
9:45a
ISP
10:03a
24h 18m
1 stop
Depart: Sun Jul 24 2016 Return: Sun Jul 31 2016 Trip spans 8 days
Major Airline
Major Airline
ISP
5:10a
IAD
3:15p
10h 05m
2 stops
IAD
1:15a
ISP
10:31a
9h 16m
2 stops
Depart: Fri May 13 2016 Return: Sun May 15 2016 Trip spans 3 days
American Airlines
American Airlines
ISP
3:20a
IAD
11:44a
8h 24m
2 stops
IAD
1:15a
ISP
7:28a
6h 13m
2 stops
Depart: Sun May 1 2016 Return: Tue May 3 2016 Trip spans 3 days
Major Airline
Major Airline
ISP
11:30p
IAD
7:44a
8h 14m
2 stops
IAD
3:01a
ISP
2:01p
11h 00m
2 stops
Depart: Thu May 5 2016 Return: Sun May 8 2016 Trip spans 4 days
$2202
Select
Linear Air Taxi
Linear Air Taxi
ISP
3:00a
IAD
5:15a
2h 15m
nonstop
IAD
4:00p
ISP
6:15p
2h 15m
nonstop
Depart: Mon May 2 2016 Return: Tue May 3 2016 Trip spans 2 days
$2890
Select
Linear Air Taxi
Linear Air Taxi
ISP
6:00a
IAD
8:03a
2h 03m
nonstop
IAD
1:00p
ISP
3:03p
2h 03m
nonstop
Depart: Fri May 6 2016 Return: Sat May 7 2016 Trip spans 2 days
$2890
Select
Linear Air Taxi
Linear Air Taxi
ISP
2:00p
IAD
4:03p
2h 03m
nonstop
IAD
11:00a
ISP
1:03p
2h 03m
nonstop
Depart: Tue May 10 2016 Return: Wed May 11 2016 Trip spans 2 days
$2983
Select
Linear Air Taxi
Linear Air Taxi
ISP
7:00a
IAD
8:48a
1h 48m
nonstop
IAD
5:00p
ISP
6:48p
1h 48m
nonstop
Depart: Tue May 3 2016 Return: Thu May 5 2016 Trip spans 3 days
$3955
Select
Linear Air Taxi
Linear Air Taxi
ISP
3:00a
IAD
4:48a
1h 48m
nonstop
IAD
11:00a
ISP
12:48p
1h 48m
nonstop
Depart: Tue May 17 2016 Return: Thu May 19 2016 Trip spans 3 days
$3955
Select
Linear Air Taxi
Linear Air Taxi
ISP
11:00a
IAD
12:48p
1h 48m
nonstop
IAD
5:00p
ISP
6:48p
1h 48m
nonstop
Depart: Fri May 27 2016 Return: Sun May 29 2016 Trip spans 3 days
$3955
Select
Linear Air Taxi
Linear Air Taxi
ISP
6:00a
IAD
7:48a
1h 48m
nonstop
IAD
3:00p
ISP
4:48p
1h 48m
nonstop
Depart: Wed Jun 8 2016 Return: Sat Jun 11 2016 Trip spans 4 days
$3955
Select
Linear Air Taxi
Linear Air Taxi
ISP
2:00a
IAD
3:48a
1h 48m
nonstop
IAD
1:00p
ISP
2:48p
1h 48m
nonstop
Depart: Thu Jul 7 2016 Return: Wed Jul 13 2016 Trip spans 7 days
$3955
Select
Linear Air Taxi
Linear Air Taxi
ISP
9:00a
IAD
10:48a
1h 48m
nonstop
IAD
8:00a
ISP
9:48a
1h 48m
nonstop
Depart: Mon Jul 11 2016 Return: Wed Jul 13 2016 Trip spans 3 days
$3955
Select
Linear Air Taxi
Linear Air Taxi
ISP
11:00a
IAD
12:48p
1h 48m
nonstop
IAD
4:00a
ISP
5:48a
1h 48m
nonstop
Depart: Sat Sep 10 2016 Return: Wed Sep 14 2016 Trip spans 5 days
$3955
Select
Linear Air Taxi
Linear Air Taxi
ISP
3:00a
IAD
4:48a
1h 48m
nonstop
IAD
4:00a
ISP
5:48a
1h 48m
nonstop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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

Here's why:

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

We aggregate tons 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 don'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.

More questions or if you have a bad price to report to us
Please send us an email and someone from our team will get back to you promptly.

Airports
Origin

Islip
$406
Destination

Washington
$406