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.

$1,523 Cheap Flights from Islip to Portugal in 2026

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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.

12:30 pm - 10:15 am

ISP

LIS

16h 45m

2 stops

12:00 pm - 7:45 pm

LIS

ISP

12h 45m

1 stop

$1,523Multiple Airlines

Thu, May 7 - Thu, May 14

12:30 pm - 11:40 pm

ISP

LIS

30h 10m

2 stops

12:00 pm - 7:45 pm

LIS

ISP

12h 45m

1 stop

$1,535Multiple Airlines

Thu, May 7 - Thu, May 14

12:30 pm - 10:20 am

ISP

LIS

16h 50m

1 stop

12:00 pm - 7:45 pm

LIS

ISP

12h 45m

1 stop

$1,686Multiple Airlines

Thu, May 7 - Thu, May 14

12:30 pm - 10:20 am

ISP

LIS

16h 50m

1 stop

12:00 pm - 7:45 pm

LIS

ISP

12h 45m

1 stop

$1,688Multiple Airlines

Thu, May 7 - Thu, May 14

4:07 pm - 9:55 pm

ISP

LIS

48h 48m

2 stops

12:00 pm - 6:44 pm

LIS

ISP

11h 44m

1 stop

$1,791Multiple Airlines

Thu, Apr 16 - Thu, Apr 23

9:04 pm - 10:15 am

ISP

LIS

56h 11m

2 stops

5:45 pm - 4:18 pm

LIS

ISP

27h 33m

2 stops

$1,905Multiple Airlines

Thu, Apr 16 - Thu, Apr 23

12:30 pm - 9:05 am

ISP

LIS

15h 35m

2 stops

8:25 am - 7:45 pm

LIS

ISP

16h 20m

2 stops

$1,951Multiple Airlines

Thu, May 7 - Thu, May 14

12:30 pm - 9:05 am

ISP

LIS

15h 35m

2 stops

8:25 am - 7:45 pm

LIS

ISP

16h 20m

2 stops

$1,997Multiple Airlines

Thu, May 7 - Thu, May 14

9:59 am - 1:05 pm

ISP

LIS

22h 06m

2 stops

7:55 pm - 6:44 pm

LIS

ISP

27h 49m

3 stops

$2,536Multiple Airlines

Thu, Apr 16 - Thu, Apr 23

9:59 am - 5:40 am

ISP

LIS

14h 41m

1 stop

12:00 pm - 6:44 pm

LIS

ISP

11h 44m

1 stop

$3,360Multiple Airlines

Thu, Apr 16 - Thu, Apr 23

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Thu 5/7

12:30 pm-10:15 am

2 stops16h 45m

Lisbon Humberto Delgado

Thu 5/14

12:00 pm-7:45 pm

1 stop12h 45m

$1,523

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Thu 5/7

12:30 pm-11:40 pm

2 stops30h 10m

Lisbon Humberto Delgado

Thu 5/14

12:00 pm-7:45 pm

1 stop12h 45m

$1,535

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Thu 5/7

12:30 pm-10:20 am

1 stop16h 50m

Lisbon Humberto Delgado

Thu 5/14

12:00 pm-7:45 pm

1 stop12h 45m

$1,686

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Thu 5/7

12:30 pm-10:20 am

1 stop16h 50m

Lisbon Humberto Delgado

Thu 5/14

12:00 pm-7:45 pm

1 stop12h 45m

$1,688

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Thu 4/16

4:07 pm-9:55 pm

2 stops48h 48m

Lisbon Humberto Delgado

Thu 4/23

12:00 pm-6:44 pm

1 stop11h 44m

$1,791

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Thu 4/16

9:04 pm-10:15 am

2 stops56h 11m

Lisbon Humberto Delgado

Thu 4/23

5:45 pm-4:18 pm

2 stops27h 33m

$1,905

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Thu 5/7

12:30 pm-9:05 am

2 stops15h 35m

Lisbon Humberto Delgado

Thu 5/14

8:25 am-7:45 pm

2 stops16h 20m

$1,951

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Thu 5/7

12:30 pm-9:05 am

2 stops15h 35m

Lisbon Humberto Delgado

Thu 5/14

8:25 am-7:45 pm

2 stops16h 20m

$1,997

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Thu 4/16

9:59 am-1:05 pm

2 stops22h 06m

Lisbon Humberto Delgado

Thu 4/23

7:55 pm-6:44 pm

3 stops27h 49m

$2,536

Quickest round-trip

IslipLisbon

ISP - LIS

ISPLIS

Islip Long Island

Thu 4/16

9:59 am-5:40 am

1 stop14h 41m

Lisbon Humberto Delgado

Thu 4/23

12:00 pm-6:44 pm

1 stop11h 44m

$3,360

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 21 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	21h 55m
Direct flights	None

The fastest flight from Islip, New York to Portugal takes 21h 55m

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.