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$51+ Cheap flights from Islip to Charleston (ISP - CHS)

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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — CHS
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Find cheap flights from Islip to Charleston with Cheapflights

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Cheapflights Tip: The best prices from Islip Long Island to Charleston are usually found in January or February, booked 81 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

Cheap flight deals from Islip to Charleston

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Charleston (CHS). 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 September 11, 2025.

Round-trip from

$89
(CheapOair)

One-way from

$51
(CheapOair)

Popular in

April

Cheapest in

January

Average price

$191

Good round-trip deal

$122 or less

Good one-way deal

$39 or less
From Islip Long Island to Charleston
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One-way flight from Islip Long Island to Charleston
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Highest demand for flights based on searches. 10% potential increase in price ($24 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Islip Long Island to Charleston.
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Price to beat on a one-way flight from Islip Long Island to Charleston.
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Find flight deals from Islip to Charleston

Cheapest flights from Islip to Charleston
Explore the most affordable flight options available from Islip to Charleston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This CheapOair deal was found by Cheapflights users on 9/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/248:21 pmISP - CHS
Nonstop2h 12mBreeze Airways
Wed 10/15:48 pmCHS - ISP
Nonstop1h 53mBreeze Airways
Deal found 9/9$89
This Breeze Airways deal was found by Cheapflights users on 9/9. 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 Breeze Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/148:47 pmISP - CHS
Nonstop2h 12mBreeze Airways
Mon 11/176:14 pmCHS - ISP
Nonstop1h 53mBreeze Airways
Deal found 9/9$108
This CheapOair deal was found by Cheapflights users on 9/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/158:21 pmISP - CHS
Nonstop2h 12mBreeze Airways
Wed 10/225:48 pmCHS - ISP
Nonstop1h 53mBreeze Airways
Deal found 9/10$112
This CheapOair deal was found by Cheapflights users on 9/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/228:47 pmISP - CHS
Nonstop2h 12mBreeze Airways
Fri 9/266:14 pmCHS - ISP
Nonstop1h 53mBreeze Airways
Deal found 9/10$115
This CheapOair deal was found by Cheapflights users on 9/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/68:47 pmISP - CHS
Nonstop2h 12mBreeze Airways
Fri 10/106:14 pmCHS - ISP
Nonstop1h 53mBreeze Airways
Deal found 9/10$122
This CheapOair deal was found by Cheapflights users on 9/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/307:36 pmISP - CHS
1 stop3h 23mBreeze Airways
Mon 11/36:14 pmCHS - ISP
Nonstop1h 53mBreeze Airways
Deal found 9/9$125
This Breeze Airways deal was found by Cheapflights users on 9/11. 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 Breeze Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/78:47 pmISP - CHS
Nonstop2h 12mBreeze Airways
Mon 11/106:14 pmCHS - ISP
Nonstop1h 53mBreeze Airways
Deal found 9/11$128
This Breeze Airways deal was found by Cheapflights users on 9/9. 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 Breeze Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/208:47 pmISP - CHS
Nonstop2h 12mBreeze Airways
Thu 10/233:43 pmCHS - ISP
1 stop3h 13mBreeze Airways
Deal found 9/9$129
This CheapOair deal was found by Cheapflights users on 9/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/197:36 pmISP - CHS
1 stop3h 23mBreeze Airways
Wed 10/225:48 pmCHS - ISP
Nonstop1h 53mBreeze Airways
Deal found 9/10$133
This CheapOair deal was found by Cheapflights users on 9/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/18:21 pmISP - CHS
Nonstop2h 12mBreeze Airways
Fri 10/36:14 pmCHS - ISP
Nonstop1h 53mBreeze Airways
Deal found 9/9$137
This CheapOair deal was found by Cheapflights users on 9/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/218:47 pmISP - CHS
Nonstop2h 12mBreeze Airways
Mon 11/246:14 pmCHS - ISP
Nonstop1h 53mBreeze Airways
Deal found 9/11$142

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Charleston 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 September 11, 2025.
Use the filters below to find and compare flights from Islip to Charleston that are best for you.

Fly from

Islip

Fly to

Charleston

Route

Depart

Return

Price

IslipCharleston

ISP - CHS

ISPCHS

Islip Long Island

Fri 1/30

8:45 pm-10:57 pm

Nonstop2h 12m

Charleston

Mon 2/2

6:11 pm-8:05 pm

Nonstop1h 54m

$93

IslipCharleston

ISP - CHS

ISPCHS

Islip Long Island

Fri 11/14

8:47 pm-10:59 pm

Nonstop2h 12m

Charleston

Mon 11/17

6:14 pm-8:07 pm

Nonstop1h 53m

$108

IslipCharleston

ISP - CHS

ISPCHS

Islip Long Island

Wed 10/15

8:21 pm-10:33 pm

Nonstop2h 12m

Charleston

Wed 10/22

5:48 pm-7:41 pm

Nonstop1h 53m

$112

IslipCharleston

ISP - CHS

ISPCHS

Islip Long Island

Mon 9/22

8:47 pm-10:59 pm

Nonstop2h 12m

Charleston

Fri 9/26

6:14 pm-8:07 pm

Nonstop1h 53m

$115

IslipCharleston

ISP - CHS

ISPCHS

Islip Long Island

Fri 11/7

8:47 pm-10:59 pm

Nonstop2h 12m

Charleston

Mon 11/10

6:14 pm-8:07 pm

Nonstop1h 53m

$128

IslipCharleston

ISP - CHS

ISPCHS

Islip Long Island

Mon 10/20

8:47 pm-10:59 pm

Nonstop2h 12m

Charleston

Thu 10/23

3:43 pm-6:56 pm

1 stop3h 13m

$129

IslipCharleston

ISP - CHS

ISPCHS

Islip Long Island

Thu 1/22

7:26 pm-10:55 pm

1 stop3h 29m

Charleston

Thu 1/29

3:31 pm-6:46 pm

1 stop3h 15m

$164

IslipCharleston

ISP - CHS

ISPCHS

Islip Long Island

Fri 10/3

8:47 pm-10:59 pm

Nonstop2h 12m

Charleston

Mon 10/6

6:14 pm-8:07 pm

Nonstop1h 53m

$193

IslipCharleston

ISP - CHS

ISPCHS

Islip Long Island

Mon 9/22

8:47 pm-10:59 pm

Nonstop2h 12m

$51

IslipCharleston

ISP - CHS

ISPCHS

Islip Long Island

Wed 9/24

8:21 pm-10:33 pm

Nonstop2h 12m

$51

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/8

Showing 1-10 of 18 results
1
2

Best time to book a flight from Islip to Charleston

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

How far ahead should I book a flight from Islip to Charleston?

Use this chart to determine the optimal time to book a round-trip flight from Islip to Charleston. Price data was last updated on August 29, 2025.

The price you pay for your flight from Islip to Charleston may vary depending on when you book. For the best chance of a lower fare, look to book 81 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, August is the cheapest month in which you can book a flight from Islip to Charleston (average of $217). Flying from Islip to Charleston in March is currently the most expensive (average of $335). 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.

What is the cheapest time of day to fly from ISP to CHS?

Find hourly flight availability from Islip to Charleston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 33% on flights from Islip to Charleston by exploring options for tickets in the evening.

Reviews of airlines servicing Charleston

Get insights into the airlines that provide service to Charleston. 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 Charleston. Reviews last updated September 11, 2025.
Read reviews from past customers who have flown Southwest and Breeze Airways from Islip to Charleston. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Breeze Airways
8.0
Very good
205 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

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

  • How popular is this Islip to Charleston flight route?

    Flights from Islip Long Island to Charleston have been viewed 1 times in the past calendar month.

  • How long is the flight from Islip to Charleston?

    There are many flights that can get you from Islip to Charleston in 2h 12m. Fly via Breeze Airways to get the fastest option. Airlines will cover a distance of 666 mi. Most flights are nonstop.

  • What are the cheapest airlines flying from Islip to Charleston round-trip?

    According to our current data, Breeze Airways ($94), and Southwest ($296) offers the cheapest pricing from Islip to Charleston. Breeze Airways is 56% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest flights from Islip to Charleston?

    Looking for the cheapest flight from Islip to Charleston? While on average our users pay $126, our data indicates the cheapest price to be $39. The most popular route (Islip Long Island - Charleston), is priced around $97.

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

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

  • How can I find direct flights from Islip to Charleston?

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

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

    Yes. Cheapflights offers flight deals from Islip to Charleston 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 Charleston?

    Currently, August is the cheapest month in which you can book a flight from Islip to Charleston (average of $217). Flying from Islip to Charleston in March is currently the most expensive (average of $335). 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 Charleston?

Book flights to Charleston if you plan to visit one of these locations
North Charleston
Summerville
Walterboro
Mount Pleasant
Isle of Palms
Santee
Edisto Beach

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Islip to Charleston

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Islip to Charleston

Discover the top 2 airlines that operate flights from Islip to Charleston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Breeze AirwaysCheapest$94Average$204FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$296Average$486FlexibilityNo cancel feeOn-time63%

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