Find Cheap Flights to Portugal

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.
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Book cheap flights from Islip Long Island to Portugal

(Round-trip)
Depart: Thu Aug 17 2017 Return: Thu Aug 31 2017 Trip spans 15 days
American Airlines
American Airlines
ISP
12:00a
LIS
10:20a
10h 20m
1 stop
LIS
12:00a
ISP
2:53p
14h 53m
1 stop
Depart: Thu Aug 10 2017 Return: Sat Aug 26 2017 Trip spans 17 days
$1394
Select
Multiple Airlines
Multiple Airlines
ISP
12:00a
OPO
7:45p
19h 45m
2 stops
OPO
12:00a
ISP
5:53a
29h 53m
2 stops
Depart: Fri Aug 18 2017 Return: Mon Aug 28 2017 Trip spans 11 days
American Airlines
American Airlines
ISP
12:00a
LIS
3:05p
15h 05m
1 stop
LIS
12:00a
ISP
2:53p
14h 53m
1 stop
Depart: Sun Aug 20 2017 Return: Thu Aug 31 2017 Trip spans 12 days
American Airlines
American Airlines
ISP
12:00a
LIS
10:20a
10h 20m
1 stop
LIS
12:00a
ISP
2:53p
14h 53m
1 stop
Depart: Sun Aug 27 2017 Return: Wed Sep 6 2017 Trip spans 11 days
$1034
Select
American Airlines
American Airlines
ISP
12:00a
LIS
10:06a
10h 06m
1 stop
LIS
12:00a
ISP
3:13p
15h 13m
1 stop
Depart: Thu Oct 26 2017 Return: Sun Oct 29 2017 Trip spans 4 days
$1084
Select
American Airlines
American Airlines
ISP
12:00a
LIS
1:15p
13h 15m
1 stop
LIS
12:00a
ISP
2:41p
14h 41m
1 stop
Depart: Wed Sep 20 2017 Return: Mon Sep 25 2017 Trip spans 6 days
$1094
Select
American Airlines
American Airlines
ISP
12:00a
LIS
10:06a
10h 06m
1 stop
LIS
12:00a
ISP
2:53p
14h 53m
1 stop
Depart: Tue Sep 5 2017 Return: Mon Sep 11 2017 Trip spans 7 days
$1097
Select
American Airlines
American Airlines
ISP
12:00a
LIS
10:06a
10h 06m
1 stop
LIS
12:00a
ISP
2:53p
14h 53m
1 stop
Depart: Fri Sep 15 2017 Return: Thu Sep 21 2017 Trip spans 7 days
$1134
Select
American Airlines
American Airlines
ISP
12:00a
LIS
3:05p
15h 05m
1 stop
LIS
12:00a
ISP
2:53p
14h 53m
1 stop
Depart: Fri Sep 8 2017 Return: Sun Sep 17 2017 Trip spans 10 days
$1248
Select
American Airlines
American Airlines
ISP
12:00a
LIS
10:06a
10h 06m
1 stop
LIS
12:00a
ISP
2:53p
14h 53m
1 stop
Depart: Fri Sep 22 2017 Return: Sun Oct 1 2017 Trip spans 10 days
$1248
Select
American Airlines
American Airlines
ISP
12:00a
LIS
3:05p
15h 05m
1 stop
LIS
12:00a
ISP
2:53p
14h 53m
1 stop
Depart: Fri Sep 29 2017 Return: Sat Oct 7 2017 Trip spans 9 days
$1248
Select
American Airlines
American Airlines
ISP
12:00a
LIS
3:05p
15h 05m
1 stop
LIS
12:00a
ISP
2:41p
14h 41m
1 stop
Depart: Wed Aug 16 2017 Return: Wed Aug 30 2017 Trip spans 15 days
$1252
Select
American Airlines
American Airlines
ISP
12:00a
LIS
10:20a
10h 20m
1 stop
LIS
12:00a
ISP
3:13p
15h 13m
1 stop
Depart: Sun Aug 20 2017 Return: Tue Aug 29 2017 Trip spans 10 days
$1252
Select
American Airlines
American Airlines
ISP
12:00a
LIS
10:20a
10h 20m
1 stop
LIS
12:00a
ISP
3:03p
15h 03m
1 stop
Depart: Tue Sep 19 2017 Return: Tue Sep 26 2017 Trip spans 8 days
$1254
Select
American Airlines
American Airlines
ISP
12:00a
LIS
10:06a
10h 06m
1 stop
LIS
12:00a
ISP
2:53p
14h 53m
1 stop
Depart: Thu Aug 3 2017 Return: Thu Aug 10 2017 Trip spans 8 days
$1290
Select
American Airlines
American Airlines
ISP
12:00a
LIS
3:08p
15h 08m
1 stop
LIS
12:00a
ISP
2:49p
14h 49m
1 stop
Depart: Sat Aug 5 2017 Return: Wed Aug 16 2017 Trip spans 12 days
$1290
Select
American Airlines
American Airlines
ISP
12:00a
LIS
3:05p
15h 05m
1 stop
LIS
12:00a
ISP
3:09p
15h 09m
1 stop
Depart: Fri Aug 11 2017 Return: Thu Aug 17 2017 Trip spans 7 days
$1290
Select
American Airlines
American Airlines
ISP
12:00a
LIS
10:20a
10h 20m
1 stop
LIS
12:00a
ISP
2:49p
14h 49m
1 stop
Depart: Sat Sep 16 2017 Return: Tue Sep 26 2017 Trip spans 11 days
$1294
Select
American Airlines
American Airlines
ISP
12:00a
LIS
3:05p
15h 05m
1 stop
LIS
12:00a
ISP
2:53p
14h 53m
1 stop
Depart: Tue Aug 15 2017 Return: Tue Aug 29 2017 Trip spans 15 days
$1302
Select
American Airlines
American Airlines
ISP
12:00a
LIS
10:20a
10h 20m
1 stop
LIS
12:00a
ISP
3:03p
15h 03m
1 stop
* 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.

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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,
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Airports
Origin

Islip
$922
Destination

Porto
$1394
Lisbon
$922