$345+ Cheap flights from Islip, NY to Knoxville (ISP - TYS)
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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — TYS
jul 8 — jul 151
1 adult, Economy
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Find cheap flights from Islip to Knoxville with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to Knoxville
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Knoxville (TYS). 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 julho 3, 2025.
Round-trip from | $624 (Mytrip) |
|---|---|
One-way from | $345 (Frontier) |
Popular in | November |
Cheapest in | January |
Average price | $279 |
Find flight deals from Islip to Knoxville
Cheapest flights from Islip to KnoxvilleExplore the most affordable flight options available from Islip to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julho 3, 2025.
Explore the most affordable flight options available from Islip to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julho 3, 2025.
This Frontier deal was found by Cheapflights users on 7/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 7/128:37 pmISP - TYS
2 stops19h 52mFrontier
qui 7/175:25 pmTYS - ISP
2 stops19h 39mFrontier
Deal found 7/3![Frontier logo]()
$612
This Mytrip deal was found by Cheapflights users on 7/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 7/291:55 pmISP - TYS
3 stops21h 55mMultiple Airlines
ter 8/58:20 amTYS - ISP
1 stop11h 41mMultiple Airlines
Deal found 7/1![Multiple Airlines logo]()
$624
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to Knoxville 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 julho 3, 2025.
Use the filters below to find and compare flights from Islip to Knoxville that are best for you.
Fly from
Islip
Fly to
Knoxville
Route
Depart
Return
Price
IslipKnoxville
ISP - TYS
ISPTYS
Islip Long Island
ter 7/29
1:55 pm-11:50 am
3 stops21h 55m
Knoxville McGhee Tyson
ter 8/5
8:20 am-8:01 pm
1 stop11h 41m
$624
IslipKnoxville
ISP - TYS
ISPTYS
Islip Long Island
qua 7/16
8:37 pm-4:29 pm
2 stops19h 52m
Knoxville McGhee Tyson
dom 7/20
5:25 pm-1:04 pm
2 stops19h 39m
$663
IslipKnoxville
ISP - TYS
ISPTYS
Islip Long Island
sáb 7/12
8:37 pm-4:29 pm
2 stops19h 52m
$345
Best time to book a flight from Islip to Knoxville
Have a flexible travel schedule? Discover the best time to fly to Knoxville 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 Knoxville
What is the cheapest month to book a flight from Islip, New York to Knoxville?
Currently, January is the cheapest month in which you can book a flight from Islip, New York to Knoxville (average of $296). Flying from Islip, New York to Knoxville in March is currently the most expensive (average of $376). 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.
Reviews of airlines servicing Knoxville
Get insights into the airlines that provide service to Knoxville. 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 Knoxville. Reviews last updated julho 3, 2025.
Peruse reviews from past customers who have flown with Frontier from Islip to Knoxville to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
5.6
Food
4.7
Overall
5.9
Crew
6.8
Entertainment
4.5
Boarding
6.2
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2025
TTN - TPA
Comfort
5.6
Food
4.7
Overall
5.9
Crew
6.8
Entertainment
4.5
Boarding
6.2
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2025
TTN - TPA
Related info for your journey
Find useful and relevant information for your journey from Islip to Knoxville. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Islip?
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