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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: Thu Apr 30 2015 Return: Thu May 7 2015 Trip spans 8 days
US Airways
US Airways
ISP
7:56a
IAD
3:17p
7h 21m
2 stops
IAD
1:20a
ISP
7:23a
6h 03m
2 stops
Depart: Fri Jun 5 2015 Return: Sun Jun 7 2015 Trip spans 3 days
American Airlines
American Airlines
ISP
10:47a
IAD
5:23p
6h 36m
2 stops
IAD
1:25a
ISP
7:27a
6h 02m
2 stops
Depart: Thu Jun 11 2015 Return: Sat Jun 13 2015 Trip spans 3 days
American Airlines
American Airlines
ISP
3:35a
IAD
11:46a
8h 11m
2 stops
IAD
1:25a
ISP
10:22a
8h 57m
2 stops
Depart: Sun May 10 2015 Return: Fri May 15 2015 Trip spans 6 days
American Airlines
American Airlines
ISP
7:48a
IAD
3:12p
7h 24m
2 stops
IAD
1:20a
ISP
7:23a
6h 03m
2 stops
Depart: Fri May 22 2015 Return: Mon May 25 2015 Trip spans 4 days
American Airlines
American Airlines
ISP
3:30a
IAD
11:47a
8h 17m
2 stops
IAD
1:20a
ISP
7:23a
6h 03m
2 stops
Depart: Thu Jul 30 2015 Return: Sun Aug 2 2015 Trip spans 4 days
$1777
Select
Linear Air Taxi
Linear Air Taxi
ISP
3:00a
IAD
4:51a
1h 51m
nonstop
IAD
7:00a
ISP
8:51a
1h 51m
nonstop
Depart: Wed May 13 2015 Return: Sat May 16 2015 Trip spans 4 days
$2665
Select
Linear Air Taxi
Linear Air Taxi
ISP
3:00p
IAD
4:51p
1h 51m
nonstop
IAD
12:00p
ISP
1:51p
1h 51m
nonstop
Depart: Sat May 16 2015 Return: Sun May 17 2015 Trip spans 2 days
$2665
Select
Linear Air Taxi
Linear Air Taxi
ISP
2:00p
IAD
3:51p
1h 51m
nonstop
IAD
11:00a
ISP
12:51p
1h 51m
nonstop
Depart: Wed Jun 24 2015 Return: Sun Jun 28 2015 Trip spans 5 days
$2665
Select
Linear Air Taxi
Linear Air Taxi
ISP
10:00a
IAD
11:51a
1h 51m
nonstop
IAD
4:00p
ISP
5:51p
1h 51m
nonstop
Depart: Thu Apr 23 2015 Return: Sun Apr 26 2015 Trip spans 4 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
9:00a
IAD
10:51a
1h 51m
nonstop
IAD
5:00p
ISP
6:51p
1h 51m
nonstop
Depart: Sat Apr 25 2015 Return: Sun Apr 26 2015 Trip spans 2 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
6:00a
IAD
7:51a
1h 51m
nonstop
IAD
11:00a
ISP
12:51p
1h 51m
nonstop
Depart: Wed Apr 29 2015 Return: Thu Apr 30 2015 Trip spans 2 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
3:00a
IAD
4:51a
1h 51m
nonstop
IAD
8:00a
ISP
9:51a
1h 51m
nonstop
Depart: Fri May 1 2015 Return: Sun May 3 2015 Trip spans 3 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
10:00a
IAD
11:51a
1h 51m
nonstop
IAD
2:00a
ISP
3:51a
1h 51m
nonstop
Depart: Sat May 2 2015 Return: Sun May 3 2015 Trip spans 2 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
11:00a
IAD
12:51p
1h 51m
nonstop
IAD
3:00p
ISP
4:51p
1h 51m
nonstop
Depart: Thu May 7 2015 Return: Fri May 8 2015 Trip spans 2 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
10:00a
IAD
11:51a
1h 51m
nonstop
IAD
11:00a
ISP
12:51p
1h 51m
nonstop
Depart: Fri May 8 2015 Return: Sat May 9 2015 Trip spans 2 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
4:00a
IAD
5:51a
1h 51m
nonstop
IAD
11:00a
ISP
12:51p
1h 51m
nonstop
Depart: Sat May 9 2015 Return: Sun May 10 2015 Trip spans 2 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
2:00p
IAD
3:51p
1h 51m
nonstop
IAD
8:00a
ISP
9:51a
1h 51m
nonstop
Depart: Mon May 11 2015 Return: Tue May 12 2015 Trip spans 2 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
3:00a
IAD
4:51a
1h 51m
nonstop
IAD
5:00a
ISP
6:51a
1h 51m
nonstop
Depart: Tue May 12 2015 Return: Wed May 13 2015 Trip spans 2 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
2:00a
IAD
3:51a
1h 51m
nonstop
IAD
2:00p
ISP
3:51p
1h 51m
nonstop
Depart: Fri May 15 2015 Return: Sun May 17 2015 Trip spans 3 days
$5329
Select
Linear Air Taxi
Linear Air Taxi
ISP
5:00a
IAD
6:51a
1h 51m
nonstop
IAD
5:00p
ISP
6:51p
1h 51m
nonstop
Airports
Origin

Islip
$426
Destination

Washington
$426