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.

$1,408 Cheap Flights from Islip to Portugal in 2026

1 adult

0 bags

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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.

9:59 am - 9:20 am

ISP

LIS

19h 21m

1 stop

10:40 am - 7:51 pm

LIS

ISP

38h 11m

2 stops

$1,408Multiple Airlines

Sat, Mar 28 - Sat, Apr 4

9:59 am - 9:20 am

ISP

LIS

19h 21m

1 stop

10:40 am - 7:51 pm

LIS

ISP

38h 11m

2 stops

$1,420Multiple Airlines

Sat, Mar 28 - Sat, Apr 4

9:59 am - 9:20 am

ISP

LIS

19h 21m

1 stop

12:00 pm - 6:44 pm

LIS

ISP

11h 44m

1 stop

$1,643Multiple Airlines

Sat, Mar 28 - Sat, Apr 4

9:59 am - 9:20 am

ISP

LIS

19h 21m

1 stop

12:00 pm - 6:44 pm

LIS

ISP

11h 44m

1 stop

$1,654Multiple Airlines

Sat, Mar 28 - Sat, Apr 4

12:30 pm - 5:40 am

ISP

LIS

12h 10m

1 stop

5:40 pm - 9:08 am

LIS

ISP

44h 28m

2 stops

$1,691Multiple Airlines

Thu, Jul 9 - Wed, Jul 29

9:45 am - 8:35 pm

ISP

LIS

30h 50m

2 stops

11:25 am - 9:09 am

LIS

ISP

50h 44m

2 stops

$1,983Multiple Airlines

Sat, Mar 28 - Sat, Apr 4

9:59 am - 8:00 am

ISP

LIS

17h 01m

2 stops

7:40 am - 7:45 pm

LIS

ISP

17h 05m

2 stops

$2,032Multiple Airlines

Thu, Jul 9 - Wed, Jul 29

12:30 pm - 10:45 am

ISP

LIS

17h 15m

1 stop

12:45 pm - 7:45 pm

LIS

ISP

12h 00m

1 stop

$2,110Multiple Airlines

Thu, Jul 9 - Wed, Jul 29

9:59 am - 9:55 am

ISP

LIS

19h 56m

1 stop

2:05 pm - 6:44 pm

LIS

ISP

32h 39m

2 stops

$2,131Multiple Airlines

Sat, Mar 14 - Sat, Mar 21

9:59 am - 9:35 am

ISP

LIS

19h 36m

2 stops

12:20 pm - 6:44 pm

LIS

ISP

35h 24m

2 stops

$6,604Multiple Airlines

Sat, Mar 28 - Sat, Apr 4

momondo Fare Finder

Use the filters below to find and compare flights from Islip, New York to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Sat 3/28

9:59 am-9:20 am

1 stop19h 21m

Lisbon Humberto Delgado

Sat 4/4

10:40 am-7:51 pm

2 stops38h 11m

$1,408

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Sat 3/28

9:59 am-9:20 am

1 stop19h 21m

Lisbon Humberto Delgado

Sat 4/4

10:40 am-7:51 pm

2 stops38h 11m

$1,420

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Sat 3/28

9:59 am-9:20 am

1 stop19h 21m

Lisbon Humberto Delgado

Sat 4/4

12:00 pm-6:44 pm

1 stop11h 44m

$1,643

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Sat 3/28

9:59 am-9:20 am

1 stop19h 21m

Lisbon Humberto Delgado

Sat 4/4

12:00 pm-6:44 pm

1 stop11h 44m

$1,654

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Thu 7/9

12:30 pm-5:40 am

1 stop12h 10m

Lisbon Humberto Delgado

Wed 7/29

5:40 pm-9:08 am

2 stops44h 28m

$1,691

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Sat 3/28

9:45 am-8:35 pm

2 stops30h 50m

Lisbon Humberto Delgado

Sat 4/4

11:25 am-9:09 am

2 stops50h 44m

$1,983

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Thu 7/9

9:59 am-8:00 am

2 stops17h 01m

Lisbon Humberto Delgado

Wed 7/29

7:40 am-7:45 pm

2 stops17h 05m

$2,032

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Thu 7/9

12:30 pm-10:45 am

1 stop17h 15m

Lisbon Humberto Delgado

Wed 7/29

12:45 pm-7:45 pm

1 stop12h 00m

$2,110

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Sat 3/14

9:59 am-9:55 am

1 stop19h 56m

Lisbon Humberto Delgado

Sat 3/21

2:05 pm-6:44 pm

2 stops32h 39m

$2,131

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Sat 3/28

9:59 am-9:35 am

2 stops19h 36m

Lisbon Humberto Delgado

Sat 4/4

12:20 pm-6:44 pm

2 stops35h 24m

$6,604

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 67% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 22 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	12h 10m
Direct flights	None

The fastest flight from Islip, New York to Portugal takes 12h 10m

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

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.