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

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

(Round-trip)
Depart: Mon Mar 20 2017 Return: Tue Mar 21 2017 Trip spans 2 days
American Airlines
American Airlines
ISP
1:55p
DCA
6:18p
4h 23m
1 stop
DCA
1:55p
ISP
5:58p
4h 03m
1 stop
Depart: Sat Mar 18 2017 Return: Wed Mar 22 2017 Trip spans 5 days
American Airlines
American Airlines
ISP
9:10a
DCA
12:44p
3h 34m
1 stop
DCA
1:55p
ISP
5:58p
4h 03m
1 stop
Depart: Wed May 31 2017 Return: Sun Jun 25 2017 Trip spans 26 days
American Airlines
American Airlines
ISP
1:55p
DCA
6:17p
4h 22m
1 stop
DCA
4:24a
ISP
8:30a
4h 06m
1 stop
Depart: Tue Apr 11 2017 Return: Sat Apr 15 2017 Trip spans 5 days
American Airlines
American Airlines
ISP
1:55p
DCA
6:17p
4h 22m
1 stop
DCA
2:30a
ISP
8:35a
6h 05m
1 stop
Depart: Wed Apr 12 2017 Return: Sat Apr 15 2017 Trip spans 4 days
American Airlines
American Airlines
ISP
9:10a
DCA
12:47p
3h 37m
1 stop
DCA
2:30a
ISP
8:35a
6h 05m
1 stop
Depart: Sat Mar 4 2017 Return: Sun Mar 5 2017 Trip spans 2 days
American Airlines
American Airlines
ISP
8:10a
DCA
11:39a
3h 29m
1 stop
DCA
12:55p
ISP
4:58p
4h 03m
1 stop
Depart: Fri Mar 17 2017 Return: Tue Mar 21 2017 Trip spans 5 days
American Airlines
American Airlines
ISP
2:10a
IAD
9:00a
6h 50m
2 stops
IAD
6:43a
ISP
1:15p
6h 32m
2 stops
Depart: Thu Jun 1 2017 Return: Sun Jun 25 2017 Trip spans 25 days
American Airlines
American Airlines
ISP
1:55p
DCA
6:17p
4h 22m
1 stop
DCA
4:24a
ISP
8:30a
4h 06m
1 stop
Depart: Wed Mar 8 2017 Return: Tue Mar 14 2017 Trip spans 6 days
American Airlines
American Airlines
ISP
8:10a
DCA
11:43a
3h 33m
1 stop
DCA
1:55p
ISP
5:58p
4h 03m
1 stop
Depart: Thu Mar 9 2017 Return: Fri Mar 10 2017 Trip spans 2 days
American Airlines
American Airlines
ISP
8:10a
DCA
11:43a
3h 33m
1 stop
DCA
12:55p
ISP
4:58p
4h 03m
1 stop
Depart: Fri Mar 24 2017 Return: Sun Mar 26 2017 Trip spans 3 days
American Airlines
American Airlines
ISP
1:55p
DCA
6:18p
4h 23m
1 stop
DCA
1:55p
ISP
5:58p
4h 03m
1 stop
Depart: Wed Mar 1 2017 Return: Thu Mar 2 2017 Trip spans 2 days
American Airlines
American Airlines
ISP
8:10a
DCA
11:38a
3h 28m
1 stop
DCA
12:55p
ISP
4:48p
3h 53m
1 stop
Depart: Fri Jun 2 2017 Return: Sun Jun 25 2017 Trip spans 24 days
American Airlines
American Airlines
ISP
2:20p
DCA
5:35p
3h 15m
1 stop
DCA
4:24a
ISP
8:30a
4h 06m
1 stop
Depart: Fri Apr 14 2017 Return: Sat Apr 15 2017 Trip spans 2 days
American Airlines
American Airlines
ISP
1:55p
DCA
6:17p
4h 22m
1 stop
DCA
2:30a
ISP
8:35a
6h 05m
1 stop
Depart: Sun Apr 2 2017 Return: Tue Apr 4 2017 Trip spans 3 days
American Airlines
American Airlines
ISP
1:55p
DCA
6:20p
4h 25m
1 stop
DCA
2:30a
ISP
8:35a
6h 05m
1 stop
Depart: Mon Mar 13 2017 Return: Tue Mar 14 2017 Trip spans 2 days
American Airlines
American Airlines
ISP
9:10a
DCA
12:43p
3h 33m
1 stop
DCA
1:55p
ISP
5:58p
4h 03m
1 stop
Depart: Fri Feb 24 2017 Return: Sat Feb 25 2017 Trip spans 2 days
American Airlines
American Airlines
ISP
8:10a
DCA
11:38a
3h 28m
1 stop
DCA
1:45a
ISP
7:30a
5h 45m
1 stop
Depart: Mon Apr 17 2017 Return: Tue Apr 18 2017 Trip spans 2 days
American Airlines
American Airlines
ISP
1:55p
DCA
6:17p
4h 22m
1 stop
DCA
1:55p
ISP
6:01p
4h 06m
1 stop
Depart: Fri Mar 31 2017 Return: Mon Apr 3 2017 Trip spans 4 days
American Airlines
American Airlines
ISP
1:55p
DCA
6:18p
4h 23m
1 stop
DCA
2:00p
ISP
5:58p
3h 58m
1 stop
Depart: Tue May 30 2017 Return: Sun Jun 25 2017 Trip spans 27 days
American Airlines
American Airlines
ISP
1:55p
DCA
6:17p
4h 22m
1 stop
DCA
4:24a
ISP
8:30a
4h 06m
1 stop
Select an airline:  Southwest
Direct flights ISP to WAS on Southwest
Flight # Depart ISP Arrive BWI Sun Mon Tue Wed Thu Fri Sat Valid Between
457 5:50 am 7:05 am Mar 9 - Mar 10
457 5:50 am 7:05 am Mar 13 - Apr 24
433 6:00 am 7:20 am Feb 16 - Mar 8
1216 6:25 am 7:45 am Feb 18 - Mar 4
2552 6:25 am 7:35 am Mar 12 - Apr 23
1091 6:30 am 7:40 am Mar 11 - Mar 11
1091 6:30 am 7:40 am Mar 18 - Apr 22
4942 6:30 am 7:50 am Feb 19 - Mar 5
1828 7:05 am 8:20 am Mar 13 - Apr 24
1828 7:05 am 8:20 am Mar 9 - Mar 10
2895 8:25 am 9:35 am Mar 12 - Mar 26
2895 8:25 am 9:35 am Apr 2 - Apr 2
494 8:45 am 10:00 am Feb 20 - Mar 8
551 11:20 am 12:30 pm Feb 16 - Mar 8
3489 11:40 am 12:50 pm Feb 19 - Mar 5
496 11:50 am 1:00 pm Mar 9 - Mar 10
496 11:50 am 1:00 pm Mar 13 - Apr 24
6443 11:50 am 1:00 pm Mar 12 - Apr 23
2375 12:35 pm 1:45 pm Feb 18 - Mar 4
964 12:40 pm 1:50 pm Mar 18 - Apr 22
964 12:40 pm 1:50 pm Mar 11 - Mar 11
3698 3:05 pm 4:20 pm Feb 19 - Mar 5
179 3:50 pm 5:00 pm Mar 9 - Mar 9
548 3:50 pm 5:00 pm Mar 10 - Mar 10
548 3:50 pm 5:00 pm Mar 13 - Apr 21
5565 5:00 pm 6:15 pm Mar 11 - Mar 11
5565 5:00 pm 6:15 pm Mar 18 - Apr 22
876 5:00 pm 6:20 pm Feb 18 - Mar 4
479 5:35 pm 6:50 pm Feb 16 - Mar 8
154 5:45 pm 7:00 pm Mar 9 - Mar 9
3769 5:45 pm 7:00 pm Feb 19 - Mar 5
1160 5:55 pm 7:10 pm Mar 13 - Apr 24
1160 5:55 pm 7:10 pm Mar 10 - Mar 10
3452 6:10 pm 7:20 pm Mar 12 - Apr 23
* 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 email and someone from our team will get back to you promptly.

Airports
Origin

Islip
$209
Destination

Washington
only $282
only $209