Find Cheap Flights to Portugal

Depart
Return
1 adult
Cabin Economy
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
Close
The price shown for each flight will be the average for all passengers including any infants.
Show flexible dates
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 Portugal

(Round-trip)
Depart: Thu Aug 17 2017 Return: Thu Aug 31 2017 Trip spans 15 days
$922
Select
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
$922
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: Sun Aug 20 2017 Return: Thu Aug 31 2017 Trip spans 12 days
$922
Select
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.

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
$922
Destination
Porto
$1394
Lisbon
$922