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Cheap flights from Islip to San Salvador from $418

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip to San Salvador departing on 12/19. 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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0 bags

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Find the cheapest flights from Islip to San Salvador

Cheap round-trip flights

Multiple Airlines Logo
12:00 pm - 6:30 amISP-SAL
19h 30m2 stops
Multiple Airlines Logo
3:03 pm - 12:31 amSAL-ISP
8h 28m1 stop
$744Multiple Airlines
Find Deal
Sun, Feb 8 - Sun, Feb 15
Frontier Logo
9:09 pm - 9:06 amISP-SAL
12h 57m1 stop
Frontier Logo
10:21 am - 8:14 pmSAL-ISP
8h 53m1 stop
$888Frontier
Find Deal
Fri, Dec 19 - Sat, Jan 3
Frontier Logo
8:16 pm - 1:12 pmISP-SAL
17h 56m2 stops
Frontier Logo
10:21 am - 8:14 pmSAL-ISP
8h 53m1 stop
$952Frontier
Find Deal
Thu, Dec 18 - Sat, Jan 3
Frontier Logo
9:09 pm - 9:06 amISP-SAL
12h 57m1 stop
Frontier Logo
11:15 am - 12:11 amSAL-ISP
11h 56m2 stops
$978Frontier
Find Deal
Fri, Dec 19 - Tue, Dec 30
Frontier Logo
9:09 pm - 1:12 pmISP-SAL
17h 03m2 stops
Frontier Logo
10:21 am - 8:14 pmSAL-ISP
8h 53m1 stop
$994Frontier
Find Deal
Tue, Dec 23 - Sat, Jan 3
Frontier Logo
9:09 pm - 4:31 pmISP-SAL
20h 22m2 stops
Frontier Logo
10:21 am - 8:14 pmSAL-ISP
8h 53m1 stop
$1,103Frontier
Find Deal
Mon, Dec 22 - Sat, Jan 3
Frontier Logo
8:16 pm - 1:12 pmISP-SAL
17h 56m2 stops
Frontier Logo
11:15 am - 12:11 amSAL-ISP
11h 56m2 stops
$1,134Frontier
Find Deal
Thu, Dec 18 - Tue, Dec 30
Frontier Logo
9:09 pm - 9:06 amISP-SAL
12h 57m1 stop
Frontier Logo
11:15 am - 12:11 amSAL-ISP
11h 56m2 stops
$1,170Frontier
Find Deal
Fri, Dec 19 - Sun, Jan 4
Frontier Logo
9:09 pm - 7:04 pmISP-SAL
22h 55m2 stops
Frontier Logo
11:15 am - 12:11 amSAL-ISP
11h 56m2 stops
$1,176Frontier
Find Deal
Tue, Dec 23 - Tue, Dec 30
Frontier Logo
9:09 pm - 4:31 pmISP-SAL
20h 22m2 stops
Frontier Logo
10:21 am - 8:14 pmSAL-ISP
8h 53m1 stop
$1,193Frontier
Find Deal
Sat, Dec 20 - Sat, Jan 3

Frontier flights from Islip to San Salvador

Our best Frontier deals on Islip to San Salvador flight tickets
Frontier
Dec 19
ISP9:09 pmIslip Long Island
12h 57m
1 stop
SAL9:06 amSan Salvador El Salvador Intl
Jan 3
SAL10:21 amSan Salvador El Salvador Intl
8h 53m
1 stop
ISP8:14 pmIslip Long Island
$888
Find similar
Frontier
Dec 18
ISP8:16 pmIslip Long Island
17h 56m
2 stops
SAL1:12 pmSan Salvador El Salvador Intl
Jan 3
SAL10:21 amSan Salvador El Salvador Intl
8h 53m
1 stop
ISP8:14 pmIslip Long Island
$952
Find similar
Frontier
Dec 19
ISP9:09 pmIslip Long Island
12h 57m
1 stop
SAL9:06 amSan Salvador El Salvador Intl
Dec 30
SAL11:15 amSan Salvador El Salvador Intl
11h 56m
2 stops
ISP12:11 amIslip Long Island
$978
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Islip to San Salvador that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipSan Salvador

ISP - SAL

ISPSAL

Islip Long Island

Sun 2/8

12:00 pm-6:30 am

2 stops19h 30m

San Salvador El Salvador Intl

Sun 2/15

3:03 pm-12:31 am

1 stop8h 28m

$744

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

$888

IslipSan Salvador

ISP - SAL

ISPSAL

Islip Long Island

Thu 12/18

8:16 pm-1:12 pm

2 stops17h 56m

San Salvador El Salvador Intl

Sat 1/3

10:21 am-8:14 pm

1 stop8h 53m

$952

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

Tue 12/30

11:15 am-12:11 am

2 stops11h 56m

$978

IslipSan Salvador

ISP - SAL

ISPSAL

Islip Long Island

Tue 12/23

9:09 pm-1:12 pm

2 stops17h 03m

San Salvador El Salvador Intl

Sat 1/3

10:21 am-8:14 pm

1 stop8h 53m

$994

IslipSan Salvador

ISP - SAL

ISPSAL

Islip Long Island

Mon 12/22

9:09 pm-4:31 pm

2 stops20h 22m

San Salvador El Salvador Intl

Sat 1/3

10:21 am-8:14 pm

1 stop8h 53m

$1,103

IslipSan Salvador

ISP - SAL

ISPSAL

Islip Long Island

Thu 12/18

8:16 pm-1:12 pm

2 stops17h 56m

San Salvador El Salvador Intl

Tue 12/30

11:15 am-12:11 am

2 stops11h 56m

$1,134

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

Sun 1/4

11:15 am-12:11 am

2 stops11h 56m

$1,170

IslipSan Salvador

ISP - SAL

ISPSAL

Islip Long Island

Tue 12/23

9:09 pm-7:04 pm

2 stops22h 55m

San Salvador El Salvador Intl

Tue 12/30

11:15 am-12:11 am

2 stops11h 56m

$1,176

IslipSan Salvador

ISP - SAL

ISPSAL

Islip Long Island

Sat 12/20

9:09 pm-4:31 pm

2 stops20h 22m

San Salvador El Salvador Intl

Sat 1/3

10:21 am-8:14 pm

1 stop8h 53m

$1,193

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 San Salvador from

How to get the cheapest flight ticket from Islip to San Salvador

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 day to depart on your flight to San Salvador?

On average, the least expensive day to fly to San Salvador from Islip is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $416. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to San Salvador on Monday is $466.

What is the cheapest time of day to depart on your flight to San Salvador?

Our most recent data shows that the best time of day to fly to San Salvador is in the morning. Flights from Islip to San Salvador during this time can be as low as $423. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $557 on average. Flights to San Salvador from Islip at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Islip to San Salvador

Are you open to changing your travel dates? Check out the ideal times to fly from Islip to San Salvador according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip to San Salvador (ISP to SAL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip to San Salvador

Direct flights

None
There are no direct flights from Islip to San Salvador. There are no popular flight routes from Islip to San Salvador.
Search flight deals

  • How far is Islip Long Island to San Salvador El Salvador Intl by plane?

    San Salvador El Salvador Intl is 2101.2 mi away from Islip Long Island. Typically, this will take 12h 57m by plane in normal conditions.

  • When did momondo last update prices for flights from Islip Long Island Airport to San Salvador El Salvador Intl Airport?

    Prices for flights from Islip Long Island Airport to San Salvador El Salvador Intl Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Islip Long Island Airport to San Salvador El Salvador Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Islip Long Island Airport to San Salvador El Salvador Intl Airport.

  • What documentation or ID do you need to fly to San Salvador El Salvador Intl Airport?

    The required travel and health documents for your San Salvador El Salvador Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Salvador El Salvador Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near San Salvador?

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

Why use momondo?

Why should I use momondo to find a flight deal from Islip to San Salvador?

It is quick and easy to find Islip to San Salvador flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Salvador that suits you.

Can I find flights from Islip to San Salvador with flexible booking policies on momondo?

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

How can momondo help me find flights from Islip to San Salvador?

momondo helps you find the best flight between Islip and San Salvador by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of Islip to San Salvador flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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