$364+ Cheap flights from Islip (ISP) to Portugal
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LIS
Oct 16 — Oct 231
1 adult, Economy
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Find cheap flights from Islip to Portugal with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to Portugal
Keep the following information in mind while searching for Islip to Portugal flight deals. Data was last updated September 16, 2025.
Round-trip from | $1,443 (Ovago) |
|---|---|
One-way from | $364 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $744 |
Find flight deals from Islip to Portugal
Cheapest flights from Islip to PortugalExplore the most affordable flight options available from Islip to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.
Explore the most affordable flight options available from Islip to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.
This Ovago deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/307:30 amISP - OPO
2 stops20h 10mMultiple Airlines
Thu 11/68:20 amOPO - ISP
2 stops16h 25mMultiple Airlines
Deal found 9/15![Multiple Airlines logo]()
$1,443
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Islip to Portugal that are best for you.
Fly from
Islip
Fly to
Portugal
Route
Depart
Return
Price
IslipPorto
ISP - OPO
ISPOPO
Islip Long Island
Thu 10/30
7:30 am-7:40 am
2 stops20h 10m
Porto
Thu 11/6
8:20 am-7:45 pm
2 stops16h 25m
$1,443
IslipLisbon
ISP - LIS
ISPLIS
Islip Long Island
Wed 10/15
8:21 pm-10:50 am
2 stops33h 29m
$364
Best time to book a flight from Islip to Portugal
Have a flexible travel schedule? Discover the best time to fly to Portugal from Islip with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Islip to Portugal
What is the cheapest month to book a flight from Islip to Portugal?
Currently, January is the cheapest month in which you can book a flight from Islip to Portugal (average of $612). Flying from Islip to Portugal in June is currently the most expensive (average of $1,127). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.