Cheap Flights from Knoxville to Idaho Falls

Compare Knoxville to Idaho Falls flight deals

Find the cheapest month or even day of the year to fly to Idaho Falls

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Flight deals from Knoxville to Idaho Falls

Looking for a cheap last-minute deal or the best return flight from Knoxville Airport to Idaho Falls Airport? If you want to travel next month, return fares start from R 7,550. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Knoxville to Idaho Falls

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

Knoxville to Idaho Falls: Alternative routes

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

Knoxville to Idaho Falls: Flight information

The things to know before you go.
Cheapest flight foundR 2,791
Cheapest month to flyAugust

Finding cheap flights from Knoxville to Idaho Falls: Frequently asked questions

The best price we found for a return flight from Knoxville to Idaho Falls is R 6,203. 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 Knoxville to Idaho Falls. But we found flights with one or more stops from R 6,200.
As of August 2026, there are no flights flying from Knoxville to Idaho Falls.
The cheapest month to fly from Knoxville to Idaho Falls is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Knoxville Airport to Idaho Falls Airport on Monday, 31 August 2026.
No airlines currently offer direct flights between Knoxville Airport and Idaho Falls 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 Idaho Falls 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 Idaho Falls is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, United offers the cheapest flight tickets to Idaho Falls.

Travelling from Knoxville Airport (TYS) to Idaho Falls Airport (IDA): what you need to know

  • Leave plenty of time to make your TYS to IDA flight. As a rule of thumb, arrive at least two hours before international departures and an hour ahead for domestic flights.

  • You can expect longer queues in popular months like October. Arriving up to four hours ahead of international flights and two hours for domestic departures is a smart move.

How to find the cheapest flights from Knoxville Airport (TYS) to Idaho Falls Airport (IDA)

  • The lowest price we've seen for a one-way Knoxville Airport to Idaho Falls Airport flight is R 2,791. A round-trip fare right now is R 6,200. Depending on the availability when you book, these fares can change.

  • Don't leave everything to the last moment. You're more likely to find cheap tickets from TYS to IDA if you book early. Airlines often offer some great early bird deals.

  • Finding cheap flights from Knoxville Airport to Idaho Falls Airport is easier if you're flexible with your travel plans. Use the 'Whole month' tool to see the lowest prices across each month and land a great deal.

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

  • Choose your ideal departure and arrival times, number of stops and airlines with the filters. Or sort your results by 'Cheapest' to see the best deals on flights from Knoxville Airport to Idaho Falls Airport.

Handy information about Knoxville Airport (TYS)

  • TYS's address is 2055 Alcoa Highway.

  • Of the departures from Knoxville Airport, 76% arrive as scheduled at their destination.

  • Knoxville Airport is about 24 kilometres from central Knoxville. If you're catching a taxi, ride-sharing or driving from the centre, it'll take 25 minutes or so to arrive, depending on the traffic.

  • You can expect a trip time of about 50 minutes on public transport.

  • Booked an early flight from Knoxville Airport to Idaho Falls Airport? Avoid rushing to the airport (and sneak in some extra snooze time) by choosing one of these hotels near TYS:

Arriving at Idaho Falls Airport (IDA)

  • The last thing you need is a lengthy journey to your hotel if you're landing late on a Knoxville Airport to Idaho Falls Airport flight. Reserve one of these accommodation options near IDA instead:

  • Say yes to new adventures by picking up a Idaho Falls Airport rental car. Grab a set of wheels from Budget, Avis or Alamo and explore beyond Idaho Falls's main sights.

  • Boost your chances of securing a great price by booking as early as possible. Reserving your ride from Idaho Falls Airport at least a couple of weeks in advance is a good idea.

Getting from Idaho Falls Airport (IDA) to central Idaho Falls

  • IDA is located at 2140 North Skyline.

  • From Idaho Falls Airport, Idaho Falls is approximately 8 kilometres away. It takes around 10 minutes to get to the centre driving.

  • It'll take around 30 minutes to get there by public transport.

When to fly to Idaho Falls Airport (IDA)

  • It's time to plan your trip dates for your flight from Knoxville Airport to Idaho Falls Airport. June is the busiest month to head to Idaho Falls. If you want a quieter vibe, go in March.

  • The warmest month in Idaho Falls is July, with temperatures ranging between 9ºC (48ºF) and 35ºC (95ºF). Book your flights from Knoxville Airport to Idaho Falls Airport in this month if this is the kind of weather you like.

  • If you like cooler conditions, look for a cheap ticket from TYS to IDA in January. Temperatures average between -15ºC (5ºF) and 1ºC (34ºF) then.

Explore more of the United States

  • Idaho Falls has plenty to offer, but there are so many other corners of the United States you'll want to see. About 306 kilometres south of Idaho Falls, a trip to Salt Lake City will keep you on the move. Start with attractions like Salt Lake Utah Temple, Temple Square and Salt Lake City Tabernacle.

  • Around 338 kilometres west of Idaho Falls, Boise is another favourite stop in the United States. Experience major highlights starting with Cathedral Of The Rockies, Boise Depot and St. John's Cathedral.

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