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

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: Tue Apr 28 2015 Return: Wed Apr 29 2015 Trip spans 2 days
American Airlines
American Airlines
ISP
10:52a
IAD
5:09p
6h 17m
2 stops
IAD
1:20a
ISP
7:31a
6h 11m
2 stops
Depart: Wed Apr 29 2015 Return: Thu Apr 30 2015 Trip spans 2 days
US Airways
US Airways
ISP
10:52a
IAD
7:29p
8h 37m
2 stops
IAD
1:20a
ISP
7:31a
6h 11m
2 stops
Depart: Tue Apr 14 2015 Return: Wed Apr 15 2015 Trip spans 2 days
American Airlines
American Airlines
ISP
7:56a
IAD
3:17p
7h 21m
2 stops
IAD
1:20a
ISP
7:31a
6h 11m
2 stops
Depart: Mon Apr 20 2015 Return: Tue Apr 21 2015 Trip spans 2 days
US Airways
US Airways
ISP
7:56a
IAD
5:09p
9h 13m
2 stops
IAD
1:20a
ISP
10:27a
9h 07m
2 stops
Depart: Fri May 22 2015 Return: Mon May 25 2015 Trip spans 4 days
American Airlines
American Airlines
ISP
10:47a
IAD
7:29p
8h 42m
2 stops
IAD
1:20a
ISP
7:23a
6h 03m
2 stops
Depart: Thu Jul 16 2015 Return: Mon Jul 20 2015 Trip spans 5 days
US Airways
US Airways
ISP
7:48a
IAD
1:28p
5h 40m
2 stops
IAD
1:20a
ISP
7:23a
6h 03m
2 stops
Depart: Fri Jun 26 2015 Return: Mon Jun 29 2015 Trip spans 4 days
US Airways
US Airways
ISP
2:42p
IAD
6:37a
15h 55m
2 stops
IAD
1:25a
ISP
10:22a
8h 57m
2 stops
Depart: Sun Apr 19 2015 Return: Mon Apr 20 2015 Trip spans 2 days
American Airlines
American Airlines
ISP
10:52a
IAD
5:09p
6h 17m
2 stops
IAD
9:40a
ISP
5:24p
7h 44m
2 stops
Depart: Thu Apr 9 2015 Return: Sun Apr 12 2015 Trip spans 4 days
$2665
Select
Linear Air Taxi
Linear Air Taxi
ISP
5:00p
IAD
6:51p
1h 51m
nonstop
IAD
3:00a
ISP
4:51a
1h 51m
nonstop
Depart: Fri Jul 17 2015 Return: Sun Jul 19 2015 Trip spans 3 days
$2665
Select
Linear Air Taxi
Linear Air Taxi
ISP
1:00p
IAD
2:51p
1h 51m
nonstop
IAD
10:00a
ISP
11:51a
1h 51m
nonstop
Depart: Fri Aug 21 2015 Return: Sun Aug 23 2015 Trip spans 3 days
$2665
Select
Linear Air Taxi
Linear Air Taxi
ISP
5:00p
IAD
6:51p
1h 51m
nonstop
IAD
3:00a
ISP
4:51a
1h 51m
nonstop
Depart: Mon Mar 30 2015 Return: Wed Apr 1 2015 Trip spans 3 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
7:00a
IAD
8:51a
1h 51m
nonstop
IAD
4:00a
ISP
5:51a
1h 51m
nonstop
Depart: Wed Apr 1 2015 Return: Fri Apr 3 2015 Trip spans 3 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
8:00a
IAD
9:51a
1h 51m
nonstop
IAD
2:00a
ISP
3:51a
1h 51m
nonstop
Depart: Sat Apr 4 2015 Return: Sun Apr 5 2015 Trip spans 2 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
1:00p
IAD
2:51p
1h 51m
nonstop
IAD
3:00a
ISP
4:51a
1h 51m
nonstop
Depart: Wed Apr 8 2015 Return: Thu Apr 9 2015 Trip spans 2 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
4:00a
IAD
5:51a
1h 51m
nonstop
IAD
3:00a
ISP
4:51a
1h 51m
nonstop
Depart: Fri Apr 10 2015 Return: Sun Apr 12 2015 Trip spans 3 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
5:00a
IAD
6:51a
1h 51m
nonstop
IAD
12:00p
ISP
1:51p
1h 51m
nonstop
Depart: Sun Apr 12 2015 Return: Fri Apr 17 2015 Trip spans 6 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
2:00p
IAD
3:51p
1h 51m
nonstop
IAD
10:00a
ISP
11:51a
1h 51m
nonstop
Depart: Thu Apr 16 2015 Return: Sun Apr 19 2015 Trip spans 4 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
6:00a
IAD
7:51a
1h 51m
nonstop
IAD
12:00p
ISP
1:51p
1h 51m
nonstop
Depart: Fri Apr 17 2015 Return: Sun Apr 19 2015 Trip spans 3 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
11:00a
IAD
12:51p
1h 51m
nonstop
IAD
8:00a
ISP
9:51a
1h 51m
nonstop
Depart: Sun May 3 2015 Return: Sat May 16 2015 Trip spans 14 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
2:00a
IAD
3:51a
1h 51m
nonstop
IAD
8:00a
ISP
9:51a
1h 51m
nonstop
Airports
Origin

Islip
$326
Destination

Washington
$326