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Cheap flights from Knoxville to New York from $181

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 8/26. 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
1:00 pm - 9:35 pmTYS  Knoxville McGhee Tyson-ISP Islip Long Island
8h 35m1 stop Orlando
Southwest Logo
3:20 pm - 7:55 pmISP  Islip Long Island-TYS Knoxville McGhee Tyson
4h 35m1 stop Baltimore/Washington
$240Southwest
Thu, Sep 10 - Tue, Sep 15
Multiple Airlines Logo
4:50 pm - 9:33 amTYS  Knoxville McGhee Tyson-ISP Islip Long Island
16h 43m1 stop Orlando Sanford Intl
Multiple Airlines Logo
4:13 pm - 9:44 pmISP  Islip Long Island-TYS Knoxville McGhee Tyson
29h 31m1 stop Orlando
$257Multiple Airlines
Sat, Oct 24 - Sun, Nov 1
Multiple Airlines Logo
5:33 pm - 9:33 amTYS  Knoxville McGhee Tyson-ISP Islip Long Island
16h 00m1 stop Orlando Sanford Intl
Multiple Airlines Logo
4:13 pm - 9:44 pmISP  Islip Long Island-TYS Knoxville McGhee Tyson
29h 31m1 stop Orlando
$257Multiple Airlines
Thu, Oct 22 - Sun, Nov 1
Southwest Logo
8:25 am - 9:35 pmTYS  Knoxville McGhee Tyson-ISP Islip Long Island
13h 10m2 stops Baltimore/Washington Orlando
Southwest Logo
3:20 pm - 7:55 pmISP  Islip Long Island-TYS Knoxville McGhee Tyson
4h 35m1 stop Baltimore/Washington
$258Southwest
Thu, Sep 10 - Tue, Sep 15
Multiple Airlines Logo
5:41 pm - 3:03 pmTYS  Knoxville McGhee Tyson-ISP Islip Long Island
21h 22m1 stop Orlando Sanford Intl
Multiple Airlines Logo
4:13 pm - 9:44 pmISP  Islip Long Island-TYS Knoxville McGhee Tyson
29h 31m1 stop Orlando
$274Multiple Airlines
Fri, Oct 23 - Sun, Nov 1
Multiple Airlines Logo
5:33 pm - 9:33 amTYS  Knoxville McGhee Tyson-ISP Islip Long Island
16h 00m1 stop Orlando Sanford Intl
Multiple Airlines Logo
5:28 pm - 7:57 pmISP  Islip Long Island-TYS Knoxville McGhee Tyson
26h 29m2 stops Wilmington New Hanover County Tampa
$299Multiple Airlines
Thu, Oct 22 - Sun, Nov 1
Multiple Airlines Logo
4:50 pm - 9:33 amTYS  Knoxville McGhee Tyson-ISP Islip Long Island
16h 43m1 stop Orlando Sanford Intl
Multiple Airlines Logo
5:28 pm - 7:57 pmISP  Islip Long Island-TYS Knoxville McGhee Tyson
26h 29m2 stops Wilmington New Hanover County Tampa
$299Multiple Airlines
Sat, Oct 24 - Sun, Nov 1
Multiple Airlines Logo
8:00 am - 11:20 amTYS  Knoxville McGhee Tyson-ISP Islip Long Island
27h 20m2 stops Orlando Raleigh-Durham
Multiple Airlines Logo
4:13 pm - 9:44 pmISP  Islip Long Island-TYS Knoxville McGhee Tyson
29h 31m1 stop Orlando
$302Multiple Airlines
Fri, Oct 23 - Sun, Nov 1
Southwest Logo
8:10 am - 11:55 amTYS  Knoxville McGhee Tyson-ISP Islip Long Island
3h 45m1 stop Baltimore/Washington
Southwest Logo
5:35 am - 3:00 pmISP  Islip Long Island-TYS Knoxville McGhee Tyson
9h 25m2 stops Baltimore/Washington Dallas Love Field
$319Southwest
Sat, Oct 24 - Sun, Nov 1
Southwest Logo
8:10 am - 11:55 amTYS  Knoxville McGhee Tyson-ISP Islip Long Island
3h 45m1 stop Baltimore/Washington
Southwest Logo
12:25 pm - 9:40 pmISP  Islip Long Island-TYS Knoxville McGhee Tyson
9h 15m1 stop Baltimore/Washington
$319Southwest
Sat, Oct 24 - Sun, Nov 1

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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 10
TYS1:00 pmKnoxville McGhee Tyson
8h 35m
1 stop
ISP9:35 pmIslip Long Island
Sep 15
ISP3:20 pmIslip Long Island
4h 35m
1 stop
TYS7:55 pmKnoxville McGhee Tyson
$240
Southwest
Sep 10
TYS8:25 amKnoxville McGhee Tyson
13h 10m
2 stops
ISP9:35 pmIslip Long Island
Sep 15
ISP3:20 pmIslip Long Island
4h 35m
1 stop
TYS7:55 pmKnoxville McGhee Tyson
$258
Southwest
Oct 24
TYS8:10 amKnoxville McGhee Tyson
3h 45m
1 stop
ISP11:55 amIslip Long Island
Nov 1
ISP5:35 amIslip Long Island
9h 25m
2 stops
TYS3:00 pmKnoxville McGhee Tyson
$319

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 August 13, 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 Knoxville McGhee Tyson - ISP Islip Long Island

TYSISP

Knoxville McGhee Tyson

Thu 9/10

1:00 pm-9:35 pm

1 stop8h 35m

Islip Long Island

Tue 9/15

3:20 pm-7:55 pm

1 stop4h 35m

$240

KnoxvilleIslip

TYS Knoxville McGhee Tyson - ISP Islip Long Island

TYSISP

Knoxville McGhee Tyson

Sat 10/24

4:50 pm-9:33 am

1 stop16h 43m

Islip Long Island

Sun 11/1

4:13 pm-9:44 pm

1 stop29h 31m

$257

KnoxvilleIslip

TYS Knoxville McGhee Tyson - ISP Islip Long Island

TYSISP

Knoxville McGhee Tyson

Thu 10/22

5:33 pm-9:33 am

1 stop16h 00m

Islip Long Island

Sun 11/1

4:13 pm-9:44 pm

1 stop29h 31m

$257

KnoxvilleIslip

TYS Knoxville McGhee Tyson - ISP Islip Long Island

TYSISP

Knoxville McGhee Tyson

Thu 9/10

8:25 am-9:35 pm

2 stops13h 10m

Islip Long Island

Tue 9/15

3:20 pm-7:55 pm

1 stop4h 35m

$258

KnoxvilleIslip

TYS Knoxville McGhee Tyson - ISP Islip Long Island

TYSISP

Knoxville McGhee Tyson

Fri 10/23

5:41 pm-3:03 pm

1 stop21h 22m

Islip Long Island

Sun 11/1

4:13 pm-9:44 pm

1 stop29h 31m

$274

KnoxvilleIslip

TYS Knoxville McGhee Tyson - ISP Islip Long Island

TYSISP

Knoxville McGhee Tyson

Thu 10/22

5:33 pm-9:33 am

1 stop16h 00m

Islip Long Island

Sun 11/1

5:28 pm-7:57 pm

2 stops26h 29m

$299

KnoxvilleIslip

TYS Knoxville McGhee Tyson - ISP Islip Long Island

TYSISP

Knoxville McGhee Tyson

Sat 10/24

4:50 pm-9:33 am

1 stop16h 43m

Islip Long Island

Sun 11/1

5:28 pm-7:57 pm

2 stops26h 29m

$299

KnoxvilleIslip

TYS Knoxville McGhee Tyson - ISP Islip Long Island

TYSISP

Knoxville McGhee Tyson

Fri 10/23

8:00 am-11:20 am

2 stops27h 20m

Islip Long Island

Sun 11/1

4:13 pm-9:44 pm

1 stop29h 31m

$302

KnoxvilleIslip

TYS Knoxville McGhee Tyson - ISP Islip Long Island

TYSISP

Knoxville McGhee Tyson

Sat 10/24

8:10 am-11:55 am

1 stop3h 45m

Islip Long Island

Sun 11/1

5:35 am-3:00 pm

2 stops9h 25m

$319
Quickest round-trip

KnoxvilleIslip

TYS Knoxville McGhee Tyson - ISP Islip Long Island

TYSISP

Knoxville McGhee Tyson

Sat 10/24

8:10 am-11:55 am

1 stop3h 45m

Islip Long Island

Sun 11/1

12:25 pm-9:40 pm

1 stop9h 15m

$319

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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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 25% 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

8h 25m

Direct flights

None
The fastest flight from Knoxville to Islip, New York takes 8h 25m
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 8h 25m.

  • 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 $317Free CancellationRating
8.0
4,218 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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