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Cheap flights from Knoxville to New York from $158

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to New York departing on 8/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Knoxville to New York

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
8:05 am - 12:10 pm
TYS
-
ISP
4h 05m
1 stop
Southwest Logo
12:55 pm - 7:50 pm
ISP
-
TYS
6h 55m
1 stop
$279Southwest
Wed, Sep 9 - Wed, Sep 16
Southwest Logo
12:45 pm - 9:05 pm
TYS
-
ISP
8h 20m
2 stops
Southwest Logo
12:55 pm - 7:50 pm
ISP
-
TYS
6h 55m
1 stop
$284Southwest
Wed, Sep 9 - Wed, Sep 16
Southwest Logo
7:00 am - 2:55 pm
TYS
-
ISP
7h 55m
2 stops
Southwest Logo
6:05 am - 6:55 pm
ISP
-
TYS
12h 50m
2 stops
$295Southwest
Wed, Sep 9 - Wed, Sep 16
Southwest Logo
8:25 am - 12:35 pm
TYS
-
ISP
4h 10m
1 stop
Southwest Logo
3:20 pm - 7:50 pm
ISP
-
TYS
4h 30m
1 stop
$318Southwest
Mon, Aug 17 - Tue, Aug 25
Southwest Logo
8:25 am - 12:35 pm
TYS
-
ISP
4h 10m
1 stop
Southwest Logo
10:30 am - 7:50 pm
ISP
-
TYS
9h 20m
2 stops
$323Southwest
Mon, Aug 17 - Tue, Aug 25
Southwest Logo
1:00 pm - 10:05 pm
TYS
-
ISP
9h 05m
2 stops
Southwest Logo
10:30 am - 7:50 pm
ISP
-
TYS
9h 20m
2 stops
$328Southwest
Mon, Aug 17 - Tue, Aug 25
Southwest Logo
8:30 am - 6:45 pm
TYS
-
ISP
10h 15m
1 stop
Southwest Logo
3:20 pm - 7:50 pm
ISP
-
TYS
4h 30m
1 stop
$333Southwest
Sun, Aug 30 - Wed, Sep 9
Southwest Logo
8:30 am - 3:55 pm
TYS
-
ISP
7h 25m
1 stop
Southwest Logo
4:05 pm - 7:55 pm
ISP
-
TYS
3h 50m
1 stop
$341Southwest
Sun, Sep 20 - Mon, Sep 21
Southwest Logo
8:30 am - 3:55 pm
TYS
-
ISP
7h 25m
1 stop
Southwest Logo
10:20 am - 6:35 pm
ISP
-
TYS
8h 15m
2 stops
$347Southwest
Sun, Sep 20 - Mon, Sep 21
Southwest Logo
8:30 am - 11:15 pm
TYS
-
ISP
14h 45m
2 stops
Southwest Logo
6:10 am - 5:10 pm
ISP
-
TYS
11h 00m
2 stops
$352Southwest
Sun, Sep 20 - Mon, Sep 21

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Southwest flights from Knoxville to Islip, New York

Our best Southwest deals on Knoxville to Islip, New York flight tickets
Southwest
Sep 9
TYS8:05 amKnoxville McGhee Tyson
4h 05m
1 stop
ISP12:10 pmIslip Long Island
Sep 16
ISP12:55 pmIslip Long Island
6h 55m
1 stop
TYS7:50 pmKnoxville McGhee Tyson
$279
Southwest
Sep 9
TYS12:45 pmKnoxville McGhee Tyson
8h 20m
2 stops
ISP9:05 pmIslip Long Island
Sep 16
ISP12:55 pmIslip Long Island
6h 55m
1 stop
TYS7:50 pmKnoxville McGhee Tyson
$284
Southwest
Sep 9
TYS7:00 amKnoxville McGhee Tyson
7h 55m
2 stops
ISP2:55 pmIslip Long Island
Sep 16
ISP6:05 amIslip Long Island
12h 50m
2 stops
TYS6:55 pmKnoxville McGhee Tyson
$295

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Islip, New York 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 June 24, 2026.
Use the filters below to find and compare flights from Knoxville to Islip, New York that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Wed 9/9

8:05 am-12:10 pm

1 stop4h 05m

Islip Long Island

Wed 9/16

12:55 pm-7:50 pm

1 stop6h 55m

$279

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Wed 9/9

12:45 pm-9:05 pm

2 stops8h 20m

Islip Long Island

Wed 9/16

12:55 pm-7:50 pm

1 stop6h 55m

$284

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Wed 9/9

7:00 am-2:55 pm

2 stops7h 55m

Islip Long Island

Wed 9/16

6:05 am-6:55 pm

2 stops12h 50m

$295
Quickest round-trip

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Mon 8/17

8:25 am-12:35 pm

1 stop4h 10m

Islip Long Island

Tue 8/25

3:20 pm-7:50 pm

1 stop4h 30m

$318

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Mon 8/17

8:25 am-12:35 pm

1 stop4h 10m

Islip Long Island

Tue 8/25

10:30 am-7:50 pm

2 stops9h 20m

$323

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Mon 8/17

1:00 pm-10:05 pm

2 stops9h 05m

Islip Long Island

Tue 8/25

10:30 am-7:50 pm

2 stops9h 20m

$328

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Sun 8/30

8:30 am-6:45 pm

1 stop10h 15m

Islip Long Island

Wed 9/9

3:20 pm-7:50 pm

1 stop4h 30m

$333

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Sun 9/20

8:30 am-3:55 pm

1 stop7h 25m

Islip Long Island

Mon 9/21

4:05 pm-7:55 pm

1 stop3h 50m

$341

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Sun 9/20

8:30 am-3:55 pm

1 stop7h 25m

Islip Long Island

Mon 9/21

10:20 am-6:35 pm

2 stops8h 15m

$347

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Sun 9/20

8:30 am-11:15 pm

2 stops14h 45m

Islip Long Island

Mon 9/21

6:10 am-5:10 pm

2 stops11h 00m

$352

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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See travel insights to New York from

How to get the cheapest flight ticket from Knoxville to Islip, New York

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

Can stopping save me money on Knoxville to Islip, New York flights?

You could potentially save up to 64% on your flight if you consider stops on a Knoxville to Islip, New York flight.

When to book flights from Knoxville to Islip, New York

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

Cheap Knoxville to Islip, New York (TYS to ISP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Islip, New York

Fastest flight time

4h 05m

Direct flights

None
The fastest flight from Knoxville to Islip, New York takes 4h 05m
There are no direct flights from Knoxville to Islip, New York. There are no popular flight routes from Knoxville to Islip, New York.
Search flight deals

Frequently asked questions about flying from Knoxville to Islip, New York

  • How far is Knoxville McGhee Tyson to Islip Long Island by plane?

    The straight-line distance from Knoxville McGhee Tyson to Islip Long Island is 666.2 mi. A reasonable flight in good conditions will take 4h 05m.

  • When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Islip Long Island Airport?

    Prices for flights from Knoxville McGhee Tyson Airport to Islip Long Island Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Islip Long Island Airport?

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Islip Long Island Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Islip Long Island Airport.

  • What documentation or ID do you need to fly to Islip Long Island Airport?

    The travel and health documents you'll need for your trip to Islip Long Island Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Islip Long Island Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Knoxville to Islip, New York?

Best airlines flying from Knoxville to Islip, New York

Compare and see reviews for airlines that fly from Knoxville to Islip, New York with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $331Free CancellationRating
7.9
4,242 reviews
Search Southwest flights

Traveling to a place near New York?

Book flights to New York if you plan to visit one of these locations
Montauk
Riverhead
Southampton
Sag Harbor
Amagansett

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Knoxville to Islip for you.

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

momondo does allow users to show only those flights to Islip from Knoxville which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Knoxville to Islip?

momondo helps you find the best flight between Knoxville and Islip 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 Knoxville to Islip right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Islip, momondo offers a useful price alert feature which will track prices for flights to Islip from Knoxville and alert you when they change.

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