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$113+ Cheap flights from Islip, NY (ISP) to Costa Rica

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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SJO
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Islip to Costa Rica

Cheapest flights from Islip to Costa Rica
Explore the most affordable flight options available from Islip to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This Ovago deal was found by Cheapflights users on 12/11. 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.
Fri 12/1210:45 amISP - SJO
1 stop26h 27mJetBlue
Wed 12/172:01 pmSJO - ISP
1 stop25h 09mJetBlue
Deal found 12/11$770
This JetBlue deal was found by Cheapflights users on 12/11. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:40 pmISP - SJO
1 stop14h 13mJetBlue
Sun 12/2810:00 amSJO - ISP
1 stop7h 45mJetBlue
Deal found 12/11$774
This Kiwi.com deal was found by Cheapflights users on 12/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1812:20 pmISP - SJO
1 stop24h 22mMultiple Airlines
Mon 1/1912:33 pmSJO - ISP
2 stops45h 37mMultiple Airlines
Deal found 12/11$867
This Southwest deal was found by Cheapflights users on 12/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/127:00 amISP - SJO
2 stops14h 30mSouthwest
Wed 12/179:00 amSJO - ISP
1 stop11h 40mSouthwest
Deal found 12/11$883
This JetBlue deal was found by Cheapflights users on 12/9. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:40 pmISP - SJO
1 stop14h 13mJetBlue
Thu 1/85:30 pmSJO - ISP
1 stop14h 22mJetBlue
Deal found 12/9$950
This Mytrip deal was found by Cheapflights users on 12/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/123:55 pmISP - SJO
3 stops20h 47mMultiple Airlines
Wed 12/171:31 pmSJO - ISP
2 stops20h 34mMultiple Airlines
Deal found 12/11$1,022
This Expedia deal was found by Cheapflights users on 12/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1810:46 amISP - SJO
1 stop22h 52mJetBlue
Mon 1/195:30 pmSJO - ISP
1 stop14h 22mJetBlue
Deal found 12/11$1,024
This JetBlue deal was found by Cheapflights users on 12/10. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/207:50 pmISP - SJO
1 stop14h 03mJetBlue
Wed 12/2410:00 amSJO - ISP
1 stop7h 45mJetBlue
Deal found 12/10$1,133

Find flight deals from Islip to Costa Rica

Keep the following information in mind while searching for Islip to Costa Rica flight deals. Data was last updated December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$325
(JetBlue)

One-way from

$113
(JetBlue)

Popular in

December

Cheapest in

October

Average price

$657
Provider with most accurate pricing for New York (NYC)-San José Juan Santamaria Intl flight deals.
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Provider most trusted by Cheapflights users for New York (NYC)-San José Juan Santamaria Intl flights.
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From Islip Long Island to Costa Rica
Search Deals
One-way flight from Islip Long Island to Costa Rica
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Highest demand for flights based on searches. 6% potential increase in price ($34 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip 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, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
Use the filters below to find and compare flights from Islip to Costa Rica that are best for you.

Fly from

Islip

Fly to

Costa Rica

Route

Depart

Return

Price

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Tue 1/20

10:00 am-4:23 pm

1 stop7h 23m

San José Juan Santamaria Intl

Mon 1/26

5:30 pm-8:52 am

1 stop14h 22m

$325

IslipLiberia

ISP - LIR

ISPLIR

Islip Long Island

Sun 2/22

1:26 pm-12:40 pm

1 stop24h 14m

Liberia

Sat 2/28

12:15 pm-10:02 am

1 stop20h 47m

$598

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Sat 2/21

1:26 pm-1:00 pm

1 stop24h 34m

San José Juan Santamaria Intl

Sat 2/28

1:10 pm-8:37 am

1 stop18h 27m

$654

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Mon 1/5

7:40 pm-8:53 am

1 stop14h 13m

San José Juan Santamaria Intl

Mon 1/12

5:30 pm-8:52 am

1 stop14h 22m

$661

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Sun 1/18

10:00 am-4:23 pm

1 stop7h 23m

San José Juan Santamaria Intl

Thu 1/22

5:30 pm-8:52 am

1 stop14h 22m

$747

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Wed 12/24

7:40 pm-8:53 am

1 stop14h 13m

San José Juan Santamaria Intl

Sun 12/28

10:00 am-6:45 pm

1 stop7h 45m

$774

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Thu 1/15

10:00 am-4:23 pm

1 stop7h 23m

San José Juan Santamaria Intl

Mon 1/19

5:30 pm-8:52 am

1 stop14h 22m

$801

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Mon 12/29

7:40 pm-8:53 am

1 stop14h 13m

San José Juan Santamaria Intl

Thu 1/8

5:30 pm-8:52 am

1 stop14h 22m

$950

IslipLiberia

ISP - LIR

ISPLIR

Islip Long Island

Sun 2/22

7:25 am-12:40 pm

2 stops30h 15m

Liberia

Sat 2/28

12:15 pm-12:09 am

1 stop10h 54m

$956

IslipSan José

ISP - SJO

ISPSJO

Islip Long Island

Sat 2/21

9:59 am-10:48 pm

2 stops13h 49m

San José Juan Santamaria Intl

Sat 2/28

1:10 pm-8:37 am

1 stop18h 27m

$978

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 22 results
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Best time to book a flight from Islip to Costa Rica

Have a flexible travel schedule? Discover the best time to fly to Costa Rica 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 Costa Rica

What is the cheapest month to book a flight from Islip, New York to Costa Rica?

Currently, November is the cheapest month in which you can book a flight from Islip, New York to Costa Rica (average of $123). Flying from Islip, New York to Costa Rica in June is currently the most expensive (average of $272). 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.

Related info for your journey

Find useful and relevant information for your journey from Islip to Costa Rica. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Islip to Costa Rica?

    Most people fly from Islip Long Island (ISP) if they book a flight from Islip to Costa Rica. Islip Long Island is conveniently located just 7.2 mi from Islip’s city center.

  • How long is the flight from Islip, New York to Costa Rica?

    Departing from Islip, New York to Costa Rica will take you 7h 23m. Airlines will cover a distance of 2232 mi.

  • Can I find deals for flights from Islip to Costa Rica that include hotel bookings?

    Yes. In addition to deals on Islip to Costa Rica flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Costa Rica?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Costa Rica.

  • Can I find deals for business class flights from Islip to Costa Rica?

    Yes. Cheapflights offers flight deals from Islip to Costa Rica by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip, New York to Costa Rica?

    Currently, November is the cheapest month in which you can book a flight from Islip, New York to Costa Rica (average of $123). Flying from Islip, New York to Costa Rica in June is currently the most expensive (average of $272). 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.

See more FAQs

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Alternative routes for Islip to Costa Rica

See prices for flight routes from nearby airports that may be better suited for you.
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