What airlines fly to Islip, New York?

Delta, American Airlines and United Airlines are the top three most popular airlines that fly to Islip, New York from Knoxville according to our data. Delta is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Islip, New York. Keep in mind that there are 6 different airlines that fly to Islip, New York on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Knoxville McGhee Tyson to Islip Long Island?

Southwest is the most popular carrier operating from Knoxville McGhee Tyson to Islip Long Island

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?

As of May 2026, there is 1 operator available to choose from 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.

$154 Cheap Flights from Knoxville to Islip, New York in 2026

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Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:53 pm - 10:05 am

TYS

ISP

16h 12m

1 stop

9:52 pm - 10:29 pm

ISP

TYS

24h 37m

1 stop

$294Multiple Airlines

Sun, Jun 7 - Wed, Jun 10

8:25 am - 12:35 pm

TYS

ISP

4h 10m

1 stop

3:20 pm - 7:50 pm

ISP

TYS

4h 30m

1 stop

$326Southwest

Mon, Sep 14 - Wed, Sep 16

12:30 pm - 10:05 pm

TYS

ISP

9h 35m

2 stops

3:20 pm - 7:50 pm

ISP

TYS

4h 30m

1 stop

$331Southwest

Mon, Sep 14 - Wed, Sep 16

12:30 pm - 10:05 pm

TYS

ISP

9h 35m

2 stops

10:30 am - 6:55 pm

ISP

TYS

8h 25m

2 stops

$336Southwest

Mon, Sep 14 - Wed, Sep 16

3:46 pm - 10:05 am

TYS

ISP

18h 19m

2 stops

11:00 am - 11:37 pm

ISP

TYS

12h 37m

1 stop

$352Multiple Airlines

Thu, May 28 - Mon, Jun 1

8:05 am - 11:50 am

TYS

ISP

3h 45m

1 stop

4:30 pm - 9:15 pm

ISP

TYS

4h 45m

1 stop

$354Southwest

Thu, May 28 - Mon, Jun 1

12:35 pm - 11:35 pm

TYS

ISP

11h 00m

2 stops

5:50 pm - 10:30 pm

ISP

TYS

4h 40m

1 stop

$362Southwest

Thu, Jul 9 - Fri, Jul 10

8:00 am - 11:35 am

TYS

ISP

3h 35m

1 stop

5:50 pm - 10:30 pm

ISP

TYS

4h 40m

1 stop

$367Southwest

Sat, Jun 6 - Fri, Jun 12

12:35 pm - 11:40 pm

TYS

ISP

11h 05m

1 stop

6:00 am - 3:45 pm

ISP

TYS

9h 45m

2 stops

$368Southwest

Thu, Jun 18 - Sun, Jun 21

8:00 am - 11:45 am

TYS

ISP

3h 45m

1 stop

6:25 am - 5:00 pm

ISP

TYS

10h 35m

1 stop

$377Southwest

Sun, Jun 7 - Wed, Jun 10

Southwest flights from Knoxville to Islip, New York

Our best Southwest deals on Knoxville to Islip, New York flight tickets

Southwest

Sep 14

TYS8:25 amKnoxville McGhee Tyson

4h 10m

1 stop

ISP12:35 pmIslip Long Island

Sep 16

ISP3:20 pmIslip Long Island

4h 30m

1 stop

TYS7:50 pmKnoxville McGhee Tyson

$326

Southwest

Sep 14

TYS12:30 pmKnoxville McGhee Tyson

9h 35m

2 stops

ISP10:05 pmIslip Long Island

Sep 16

ISP3:20 pmIslip Long Island

4h 30m

1 stop

TYS7:50 pmKnoxville McGhee Tyson

$331

Southwest

Sep 14

TYS12:30 pmKnoxville McGhee Tyson

9h 35m

2 stops

ISP10:05 pmIslip Long Island

Sep 16

ISP10:30 amIslip Long Island

8h 25m

2 stops

TYS6:55 pmKnoxville McGhee Tyson

$336

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Sun 6/7

5:53 pm-10:05 am

1 stop16h 12m

Islip Long Island

Wed 6/10

9:52 pm-10:29 pm

1 stop24h 37m

$294

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Mon 9/14

8:25 am-12:35 pm

1 stop4h 10m

Islip Long Island

Wed 9/16

3:20 pm-7:50 pm

1 stop4h 30m

$326

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Mon 9/14

12:30 pm-10:05 pm

2 stops9h 35m

Islip Long Island

Wed 9/16

3:20 pm-7:50 pm

1 stop4h 30m

$331

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Mon 9/14

12:30 pm-10:05 pm

2 stops9h 35m

Islip Long Island

Wed 9/16

10:30 am-6:55 pm

2 stops8h 25m

$336

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Thu 5/28

3:46 pm-10:05 am

2 stops18h 19m

Islip Long Island

Mon 6/1

11:00 am-11:37 pm

1 stop12h 37m

$352

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Thu 5/28

8:05 am-11:50 am

1 stop3h 45m

Islip Long Island

Mon 6/1

4:30 pm-9:15 pm

1 stop4h 45m

$354

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Thu 7/9

12:35 pm-11:35 pm

2 stops11h 00m

Islip Long Island

Fri 7/10

5:50 pm-10:30 pm

1 stop4h 40m

$362

Quickest round-trip

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Sat 6/6

8:00 am-11:35 am

1 stop3h 35m

Islip Long Island

Fri 6/12

5:50 pm-10:30 pm

1 stop4h 40m

$367

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Thu 6/18

12:35 pm-11:40 pm

1 stop11h 05m

Islip Long Island

Sun 6/21

6:00 am-3:45 pm

2 stops9h 45m

$368

KnoxvilleIslip

TYS - ISP

TYSISP

Knoxville McGhee Tyson

Sun 6/7

8:00 am-11:45 am

1 stop3h 45m

Islip Long Island

Wed 6/10

6:25 am-5:00 pm

1 stop10h 35m

$377

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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

You could potentially save up to 9% 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	3h 45m
Direct flights	None

The fastest flight from Knoxville to Islip, New York takes 3h 45m

There are no direct flights from Knoxville to Islip, New York. There are no popular flight routes from Knoxville to Islip, New York.

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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 3h 45m.
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?
As of May 2026, there is 1 operator available to choose from 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?
Based on momondo bookings for flights between Knoxville and Islip, New York, the leading airline is Southwest, making up 100% of the total bookings.

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
Southwest	PriceFrom $307	Free Cancellation	Rating 7.9 4,302 reviews		Search Southwest flights

Montauk

Riverhead

Sag Harbor

Southampton

Amagansett

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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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Cheap flights from Knoxville to New York from $154

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 6/30. 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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How to get the cheapest flight ticket from Knoxville to Islip, New York

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

What is the cheapest airline that flies from Knoxville McGhee Tyson to Islip Long Island?

What airlines fly to Islip, New York?

When to book flights from Knoxville to Islip, New York

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

Direct flights

Frequently asked questions about flying 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

Traveling to a place near New York?

Why use momondo?

An easier way to manage your Islip, New York trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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