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$597+ Cheap flights from Islip, NY (ISP) to Costa Rica

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SJO
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheap 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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$597
(Southwest)

Popular in

December

Cheapest in

September

Average price

$439
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
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Highest demand for flights based on searches. 10% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find 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 March 28, 2025.

This Southwest deal was found by Cheapflights users on 3/26. 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.
Thu 5/295:00 amISP - SJO
1 stop9h 10mSouthwest
Tue 6/38:45 amSJO - ISP
1 stop11h 25mSouthwest
Deal found 3/26$597

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 March 28, 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

Thu 5/29

5:00 am-12:10 pm

1 stop9h 10m

San José Juan Santamaria Intl

Tue 6/3

8:45 am-10:10 pm

1 stop11h 25m

$597

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

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, September is the cheapest month in which you can book a flight from Islip, New York to Costa Rica (average of $398). Flying from Islip, New York to Costa Rica in March is currently the most expensive (average of $555). 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.

Rainfall in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Costa Rica ranges from 0.0 - 11.8 inches per month. September is typically the wettest month, when rainfall can reach 11.8 in. February is typically the driest time to visit Costa Rica when rainfall is around 0.0 in.

Temperature in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Costa Rica, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 64.4 F).

Reviews of airlines servicing Costa Rica

Get insights into the airlines that provide service to Costa Rica. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Costa Rica. Reviews last updated March 28, 2025.
Southwest
8.1
Very good
4,273 reviews

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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.

  • 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, September is the cheapest month in which you can book a flight from Islip, New York to Costa Rica (average of $398). Flying from Islip, New York to Costa Rica in March is currently the most expensive (average of $555). 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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