Cheap Flights from Islip to Knoxville

Compare Islip to Knoxville flight deals

Find the cheapest month or even day of the year to fly to Knoxville

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Flight deals from Islip to Knoxville

Looking for a cheap last-minute deal or the best round-trip flight from Islip Airport to Knoxville Airport? If you want to travel next month, round-trip fares start from AED 1,113. Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Islip to Knoxville

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Islip to Knoxville flights are currently cheapest in July.

Islip to Knoxville: Alternative routes

Compare routes from Islip to Knoxville below. You may find an airport to fly into that's cheaper, faster, or easier than Knoxville.

Islip to Knoxville: Flight information

The things to know before you go.
Cheapest flight foundAED 571
Cheapest month to flyJuly

Finding cheap flights from Islip to Knoxville: Frequently asked questions

The best price we found for a round-trip flight from Islip to Knoxville is AED 1,089. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Islip to Knoxville. But we found flights with one or more stops from AED 1,089.
There are no flights flying from Islip to Knoxville, as of June 2026.
The cheapest month to fly from Islip to Knoxville is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Islip Airport to Knoxville Airport on Wednesday, August 5, 2026.
No airlines currently offer direct flights between Islip Airport and Knoxville Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Knoxville but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Knoxville is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Southwest Airlines offers the cheapest flight tickets to Knoxville.

Traveling from Islip Airport (ISP) to Knoxville Airport (TYS): what you need to know

  • Leave enough time to catch your ISP to TYS flight. As a rule of thumb, arrive two hours before international departures and an hour ahead for domestic flights.

  • During popular months like July, it's a good idea to get to the airport earlier than normal. Plan to arrive two hours before domestic departures and four hours ahead for an international flight when you travel during a peak period in general.

  • We make it simple to book a flight with a stopover. To see all your options for tickets from Islip Airport to Knoxville Airport, uncheck 'Direct flights only.' Then, choose a flight offering a stop long enough to tour your chosen city. Top stopovers between ISP and TYS include:

    • Atlanta Hartsfield-Jackson Airport

    • Orlando International Airport

    • Fort Lauderdale International Airport

How to find the cheapest flights from Islip Airport (ISP) to Knoxville Airport (TYS)

  • Right now, AED 571 is the cheapest price we've seen for a one-way Islip Airport to Knoxville Airport flight. The best price for a return plane ticket is AED 1,089. Remember that fares could change due to demand when booking.

  • To find cheap tickets from ISP to TYS, book ahead. Airlines typically offer their best fares when flights are first made available.

  • If you're flexible with your travel plans, use the 'Whole month' search tool. It'll give you the lowest price across every month when looking for your flight from Islip Airport to Knoxville Airport.

  • You don't need to check back in every day to see if fares have dropped when you create a Price Alert. We'll update you the moment there's a change in price on cheap flights from ISP to TYS.

  • Discover the perfect flight for you by using the filters. To see the 'Cheapest,' 'Fastest' or 'Best' flights from Islip Airport to Knoxville Airport, use the 'Sort by' tool. You can also filter results by departure and arrival times, airline, and number of stops.

Handy information about Islip Airport (ISP)

  • ISP is located at 100 Arrivals Avenue.

  • 76% of flights that leave from Islip Airport arrive at their destination on schedule.

  • Islip Airport is about 6 kilometers from central Islip. If you're catching a cab, ride-sharing or driving from the center, it'll take 10 minutes or so to arrive, depending on the traffic.

  • Planning to take public transport? You can expect a journey time of around 30 minutes.

  • Get your journey off to a relaxed start by staying near ISP. Whether you have an early flight from Islip Airport to Knoxville Airport or want to avoid feeling rushed, these stays are ideal:

Arriving at Knoxville Airport (TYS)

  • If you're getting in on a late Islip Airport to Knoxville Airport flight, nothing beats the convenience of being close to the terminal. Pick up your bags from the carousel and then be resting not long after at one of these hotels near TYS:

  • Get your adventure underway by picking up a Knoxville Airport rental car. Grab your wheels from Budget, Alamo or Avis and experience the lesser-explored corners of Knoxville and beyond.

  • Reserving your vehicle from Knoxville Airport about three weeks ahead can help you get the lowest rate.

Getting from Knoxville Airport (TYS) to central Knoxville

  • You'll find TYS at 2055 Alcoa Highway.

  • Knoxville Airport to the center of Knoxville has a drive time of around 25 minutes. It's approximately 24 kilometers away.

  • When traveling on public transport, expect a journey of around 50 minutes.

When to fly to Knoxville Airport (TYS)

  • The quietest month for a flight from Islip Airport to Knoxville Airport is March, while October is the busiest. Pick the ideal time to visit Knoxville based on whether you prefer a faster pace or a more relaxed vibe.

  • Lock in your flight from Islip Airport to Knoxville Airport for July if you want to explore Knoxville during its warmest month. Expect temperatures of between 17ºC (63ºF) and 32ºC (90ºF).

  • For cooler conditions, look for a cheap ticket from ISP to TYS in January. Average temperatures are between -6ºC (21ºF) and 11ºC (52ºF) then.

Explore more of the United States

  • You've seen Knoxville, now it's time to discover more of the United States. Journey about 451 kilometers north to Columbus to tick off its popular sights. From Franklin Park Conservatory and Botanical Gardens to Whetstone Park / Park of Roses and Ohio Theater, you'll have a full itinerary ahead.

  • If you're ready to explore another well-known destination in the United States, consider Indianapolis, roughly 467 kilometers north-west of Knoxville. Lucas Oil Stadium, Eiteljorg Museum and The Children's Museum of Indianapolis are key reasons to visit.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.