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$878+ Cheap flights from Islip (ISP) to San Salvador (SAL)

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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SAL
Nov 1 — Nov 81
Sat 11/1
Sat 11/8
1 adult, Economy
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Cheap flight deals from Islip to San Salvador

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to San Salvador (SAL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$878
(Frontier)

Popular in

December

Cheapest in

October

Average price

$291
Provider with most accurate pricing for Islip Long Island-San Salvador El Salvador Intl flight deals.
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Provider most trusted by Cheapflights users for Islip Long Island-San Salvador El Salvador Intl flights.
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From Islip Long Island to San Salvador El Salvador Intl
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Highest demand for flights based on searches. 19% potential increase in price ($97 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Islip to San Salvador

Cheapest flights from Islip to San Salvador
Explore the most affordable flight options available from Islip to San Salvador. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 2, 2025.

This Frontier deal was found by Cheapflights users on 10/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/199:09 pmISP - SAL
1 stop12h 57mFrontier
Sat 1/310:21 amSAL - ISP
1 stop8h 53mFrontier
Deal found 10/2$878
This Kiwi.com deal was found by Cheapflights users on 9/30. 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.
Wed 10/14:33 pmISP - SAL
2 stops22h 07mMultiple Airlines
Fri 10/107:45 amSAL - ISP
1 stop29h 36mMultiple Airlines
Deal found 9/30$1,231

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to San Salvador 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 October 2, 2025.
Use the filters below to find and compare flights from Islip to San Salvador that are best for you.

Fly from

Islip

Fly to

San Salvador

Route

Depart

Return

Price

IslipSan Salvador

ISP - SAL

ISPSAL

Islip Long Island

Fri 12/19

9:09 pm-9:06 am

1 stop12h 57m

San Salvador El Salvador Intl

Sat 1/3

10:21 am-8:14 pm

1 stop8h 53m

$878

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/2

Compare providers for flights from Islip to San Salvador

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to San Salvador in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip-San Salvador flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip-San Salvador flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip-San Salvador flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip-San Salvador flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip-San Salvador flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Islip to San Salvador

Have a flexible travel schedule? Discover the best time to fly to San Salvador 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 San Salvador

What is the cheapest month to book a flight from Islip to San Salvador?

Currently, September is the cheapest month in which you can book a flight from Islip to San Salvador (average of $260). Flying from Islip to San Salvador in December is currently the most expensive (average of $588). 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 San Salvador. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Islip to San Salvador?

    For as low as $878, Frontier can have you in San Salvador from Islip in 12h 57m. There are 2119 mi between Islip and San Salvador.

  • Can I find deals for flights from Islip to San Salvador that include hotel bookings?

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

  • How can I find direct flights from Islip to San Salvador?

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

  • Can I find deals for business class flights from Islip to San Salvador?

    Yes. Cheapflights offers flight deals from Islip to San Salvador 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 to San Salvador?

    Currently, September is the cheapest month in which you can book a flight from Islip to San Salvador (average of $260). Flying from Islip to San Salvador in December is currently the most expensive (average of $588). 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

Traveling to a place near San Salvador?

Book flights to San Salvador if you plan to visit one of these locations
Sonsonate
El Cuco
La Libertad
Acajutla

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