When did momondo last update prices for flights from Islip Long Island Airport to Portugal?

Prices for flights from Islip Long Island Airport to Portugal were last updated today.

How old do you have to be to fly from Islip Long Island Airport to Portugal?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to Portugal.

What documentation or ID do you need to fly to Portugal?

The required travel and health documents for your Portugal trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portugal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$1,307 Cheap Flights from Islip, New York to Portugal in 2026

Find the cheapest flights from Islip, New York to Portugal

Round-trip

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:43 pm - 8:10 pmISP Islip Long Island-LIS Lisbon Humberto Delgado

45h 27m2 stops Orlando London Gatwick

11:55 am - 8:15 pmLIS Lisbon Humberto Delgado-ISP Islip Long Island

13h 20m1 stop Boston Logan Intl

$1,307Multiple Airlines

Tue, Sep 29 - Tue, Oct 6

2:16 pm - 10:20 amISP Islip Long Island-LIS Lisbon Humberto Delgado

15h 04m1 stop Boston Logan Intl

11:55 am - 5:41 pmLIS Lisbon Humberto Delgado-ISP Islip Long Island

10h 46m1 stop Boston Logan Intl

$1,328Multiple Airlines

Tue, Sep 29 - Tue, Oct 6

5:43 pm - 11:45 amISP Islip Long Island-OPO Porto

37h 02m2 stops Orlando Toronto Pearson Intl

6:00 pm - 10:56 amOPO Porto-ISP Islip Long Island

21h 56m1 stop Boston Logan Intl

$1,523Multiple Airlines

Thu, Sep 10 - Wed, Sep 16

2:16 pm - 6:55 pmISP Islip Long Island-OPO Porto

23h 39m2 stops Boston Logan Intl Lisbon Humberto Delgado

10:30 pm - 8:15 pmOPO Porto-ISP Islip Long Island

26h 45m2 stops Lisbon Humberto Delgado Boston Logan Intl

$1,749Multiple Airlines

Thu, Sep 10 - Wed, Sep 16

10:05 am - 9:05 amISP Islip Long Island-LIS Lisbon Humberto Delgado

18h 00m2 stops Boston Logan Intl Philadelphia

6:35 am - 8:15 pmLIS Lisbon Humberto Delgado-ISP Islip Long Island

18h 40m2 stops Madrid Barajas Boston Logan Intl

$1,884Multiple Airlines

Tue, Sep 29 - Tue, Oct 6

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Route

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Price

Cheapest round-trip

IslipLisbon

ISP Islip Long Island - LIS Lisbon Humberto Delgado

ISPLIS

Islip Long Island

Tue 9/29

5:43 pm-8:10 pm

2 stops45h 27m

Lisbon Humberto Delgado

Tue 10/6

11:55 am-8:15 pm

1 stop13h 20m

$1,307

Quickest round-trip

IslipLisbon

ISP Islip Long Island - LIS Lisbon Humberto Delgado

ISPLIS

Islip Long Island

Tue 9/29

2:16 pm-10:20 am

1 stop15h 04m

Lisbon Humberto Delgado

Tue 10/6

11:55 am-5:41 pm

1 stop10h 46m

$1,328

IslipPorto

ISP Islip Long Island - OPO Porto

ISPOPO

Islip Long Island

Thu 9/10

5:43 pm-11:45 am

2 stops37h 02m

Porto

Wed 9/16

6:00 pm-10:56 am

1 stop21h 56m

$1,523

IslipPorto

ISP Islip Long Island - OPO Porto

ISPOPO

Islip Long Island

Thu 9/10

2:16 pm-6:55 pm

2 stops23h 39m

Porto

Wed 9/16

10:30 pm-8:15 pm

2 stops26h 45m

$1,749

IslipLisbon

ISP Islip Long Island - LIS Lisbon Humberto Delgado

ISPLIS

Islip Long Island

Tue 9/29

10:05 am-9:05 am

2 stops18h 00m

Lisbon Humberto Delgado

Tue 10/6

6:35 am-8:15 pm

2 stops18h 40m

$1,884

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Islip, New York to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What airlines fly to Portugal?

TAP AIR PORTUGAL, United Airlines and Delta are the top three most popular airlines that fly to Portugal from Islip, New York according to our data. TAP AIR PORTUGAL is the first choice among our users, with 66% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 19 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

Cheap Islip, New York to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to Portugal

Fastest flight time	10h 24m
Direct flights	None

The fastest flight from Islip, New York to Portugal takes 10h 24m

There are no direct flights from Islip, New York to Portugal. There are no popular flight routes from Islip, New York to Portugal.

Search flight deals

Frequently asked questions about flying from Islip, New York to Portugal

When did momondo last update prices for flights from Islip Long Island Airport to Portugal?
Prices for flights from Islip Long Island Airport to Portugal were last updated today.
How old do you have to be to fly from Islip Long Island Airport to Portugal?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to Portugal.
What documentation or ID do you need to fly to Portugal?
The required travel and health documents for your Portugal trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portugal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Islip to Portugal?

It is quick and easy to find Islip to Portugal flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Portugal that suits you.

Can I find flights from Islip to Portugal with flexible booking policies on momondo?

All flight searches from Islip to Portugal on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Islip to Portugal?

momondo helps you find the best flight between Islip and Portugal by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Islip to Portugal right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Portugal, momondo offers a useful price alert feature which will track prices for flights to Portugal from Islip and alert you when they change.