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Cheap flights from Islip, New York to Costa Rica from $456

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to Costa Rica departing on 3/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Islip, New York to Costa Rica

Cheap round-trip flights

Enter your travel dates to find the best prices.
JetBlue Logo
8:25 pm - 7:53 am
ISP
-
SJO
13h 28m
1 stop
JetBlue Logo
8:59 am - 12:07 am
SJO
-
ISP
13h 08m
1 stop
$456JetBlue
Mon, Mar 23 - Thu, Mar 26
JetBlue Logo
8:22 pm - 8:52 am
ISP
-
SJO
14h 30m
1 stop
JetBlue Logo
1:00 pm - 10:35 pm
SJO
-
ISP
7h 35m
1 stop
$530JetBlue
Sat, Mar 28 - Wed, Apr 1
JetBlue Logo
12:25 pm - 11:22 am
ISP
-
SJO
24h 57m
1 stop
JetBlue Logo
12:55 pm - 10:56 pm
SJO
-
ISP
8h 01m
1 stop
$531JetBlue
Mon, Jul 27 - Thu, Aug 20
Southwest Logo
6:00 am - 7:40 pm
ISP
-
SJO
15h 40m
2 stops
Southwest Logo
9:00 am - 10:05 pm
SJO
-
ISP
11h 05m
2 stops
$560Southwest
Mon, Jul 27 - Thu, Aug 20
Southwest Logo
6:00 am - 11:35 am
ISP
-
SJO
7h 35m
1 stop
Southwest Logo
9:00 am - 10:05 pm
SJO
-
ISP
11h 05m
2 stops
$575Southwest
Sun, Jul 26 - Thu, Aug 20
Southwest Logo
6:00 am - 7:40 pm
ISP
-
SJO
15h 40m
2 stops
Southwest Logo
9:00 am - 9:30 pm
SJO
-
ISP
10h 30m
1 stop
$590Southwest
Mon, Jul 27 - Thu, Aug 20
JetBlue Logo
8:22 pm - 7:53 am
ISP
-
SJO
13h 31m
1 stop
JetBlue Logo
1:00 pm - 10:35 pm
SJO
-
ISP
7h 35m
1 stop
$597JetBlue
Thu, Mar 26 - Thu, Apr 2
Southwest Logo
6:00 am - 11:35 am
ISP
-
SJO
7h 35m
1 stop
Southwest Logo
9:00 am - 9:30 pm
SJO
-
ISP
10h 30m
1 stop
$600Southwest
Sun, Jul 26 - Thu, Aug 20
Southwest Logo
5:20 am - 12:45 pm
ISP
-
SJO
9h 25m
1 stop
Southwest Logo
9:00 am - 10:05 pm
SJO
-
ISP
11h 05m
2 stops
$605Southwest
Fri, Jul 24 - Thu, Aug 20
JetBlue Logo
8:22 pm - 8:52 am
ISP
-
SJO
14h 30m
1 stop
JetBlue Logo
1:00 pm - 10:35 pm
SJO
-
ISP
7h 35m
1 stop
$616JetBlue
Sat, Mar 28 - Sat, Apr 4

JetBlue flights from Islip, New York to Costa Rica

Our best JetBlue deals on Islip, New York to Costa Rica flight tickets
JetBlue
Mar 23
ISP8:25 pmIslip Long Island
13h 28m
1 stop
SJO7:53 amSan José Juan Santamaria Intl
Mar 26
SJO8:59 amSan José Juan Santamaria Intl
13h 08m
1 stop
ISP12:07 amIslip Long Island
$456
JetBlue
Mar 28
ISP8:22 pmIslip Long Island
14h 30m
1 stop
SJO8:52 amSan José Juan Santamaria Intl
Apr 1
SJO1:00 pmSan José Juan Santamaria Intl
7h 35m
1 stop
ISP10:35 pmIslip Long Island
$530
JetBlue
Jul 27
ISP12:25 pmIslip Long Island
24h 57m
1 stop
SJO11:22 amSan José Juan Santamaria Intl
Aug 20
SJO12:55 pmSan José Juan Santamaria Intl
8h 01m
1 stop
ISP10:56 pmIslip Long Island
$531

Southwest flights from Islip, New York to Costa Rica

Our best Southwest deals on Islip, New York to Costa Rica flight tickets
Southwest
Jul 27
ISP6:00 amIslip Long Island
15h 40m
2 stops
SJO7:40 pmSan José Juan Santamaria Intl
Aug 20
SJO9:00 amSan José Juan Santamaria Intl
11h 05m
2 stops
ISP10:05 pmIslip Long Island
$560
Southwest
Jul 26
ISP6:00 amIslip Long Island
7h 35m
1 stop
SJO11:35 amSan José Juan Santamaria Intl
Aug 20
SJO9:00 amSan José Juan Santamaria Intl
11h 05m
2 stops
ISP10:05 pmIslip Long Island
$575
Southwest
Jul 27
ISP6:00 amIslip Long Island
15h 40m
2 stops
SJO7:40 pmSan José Juan Santamaria Intl
Aug 20
SJO9:00 amSan José Juan Santamaria Intl
10h 30m
1 stop
ISP9:30 pmIslip Long Island
$590

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to Costa Rica 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, momondo users made 832,500 searches. Data last updated February 11, 2026.
Use the filters below to find and compare flights from Islip, New York to Costa Rica that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Mon 3/23

8:25 pm-7:53 am

1 stop13h 28m

San José Juan Santamaria Intl

Thu 3/26

8:59 am-12:07 am

1 stop13h 08m

$456

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Sat 3/28

8:22 pm-8:52 am

1 stop14h 30m

San José Juan Santamaria Intl

Wed 4/1

1:00 pm-10:35 pm

1 stop7h 35m

$530

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Mon 7/27

12:25 pm-11:22 am

1 stop24h 57m

San José Juan Santamaria Intl

Thu 8/20

12:55 pm-10:56 pm

1 stop8h 01m

$531

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Mon 7/27

6:00 am-7:40 pm

2 stops15h 40m

San José Juan Santamaria Intl

Thu 8/20

9:00 am-10:05 pm

2 stops11h 05m

$560

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Sun 7/26

6:00 am-11:35 am

1 stop7h 35m

San José Juan Santamaria Intl

Thu 8/20

9:00 am-10:05 pm

2 stops11h 05m

$575

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Mon 7/27

6:00 am-7:40 pm

2 stops15h 40m

San José Juan Santamaria Intl

Thu 8/20

9:00 am-9:30 pm

1 stop10h 30m

$590

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Thu 3/26

8:22 pm-7:53 am

1 stop13h 31m

San José Juan Santamaria Intl

Thu 4/2

1:00 pm-10:35 pm

1 stop7h 35m

$597

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Sun 7/26

6:00 am-11:35 am

1 stop7h 35m

San José Juan Santamaria Intl

Thu 8/20

9:00 am-9:30 pm

1 stop10h 30m

$600

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Fri 7/24

5:20 am-12:45 pm

1 stop9h 25m

San José Juan Santamaria Intl

Thu 8/20

9:00 am-10:05 pm

2 stops11h 05m

$605

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Sat 3/28

8:22 pm-8:52 am

1 stop14h 30m

San José Juan Santamaria Intl

Sat 4/4

1:00 pm-10:35 pm

1 stop7h 35m

$616

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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See travel insights to Costa Rica from

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

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 is the cheapest airline that flies from Islip Long Island to Costa Rica?

JetBlue is the most popular carrier operating from Islip Long Island to Costa Rica

What airlines fly to Costa Rica?

United Airlines, JetBlue and American Airlines are the top three most popular airlines that fly to Costa Rica from Islip, New York according to our data. United Airlines is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Costa Rica. Keep in mind that there are 9 different airlines that fly to Costa Rica on a routine basis, so you have a few additional options to choose from.

Cheap Islip, New York to Costa Rica flight deals and tips

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

Fastest flight time

13h 28m

Direct flights

None
The fastest flight from Islip, New York to Costa Rica takes 13h 28m
There are no direct flights from Islip, New York to Costa Rica. There are no popular flight routes from Islip, New York to Costa Rica.
Search flight deals

  • When did momondo last update prices for flights from Islip Long Island Airport to Costa Rica?

    Prices for flights from Islip Long Island Airport to Costa Rica refresh daily.

  • How old do you have to be to fly from Islip Long Island Airport to Costa Rica?

    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 Costa Rica.

  • What documentation or ID do you need to fly to Costa Rica?

    The travel and health documents required for your trip to Costa Rica can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Costa Rica. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Islip to Costa Rica. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Islip to Costa Rica flights to just show those with flexible booking policies.

How can momondo help me find flights from Islip to Costa Rica?

Once all potential Islip to Costa Rica flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for Islip to Costa Rica flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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