Cheap Flights from Las Vegas NV to Knoxville TN from $139

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Flight deals from Las Vegas to Knoxville

Looking for a cheap last-minute deal or the best round-trip flight from Las Vegas to Knoxville? Find the lowest prices on one-way and round-trip tickets right here.

Knoxville.$139 per passenger.Departing Fri, Sep 26, returning Sun, Sep 28.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Las Vegas Harry Reid International on Fri, Sep 26, arriving in Knoxville.Inbound direct flight with Allegiant Air departing from Knoxville on Sun, Sep 28, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From $139, select.

Knoxville.$140 per passenger.Departing Fri, Sep 26, returning Mon, Oct 13.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Las Vegas Harry Reid International on Fri, Sep 26, arriving in Knoxville.Inbound direct flight with Allegiant Air departing from Knoxville on Mon, Oct 13, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From $140, select.

Knoxville.$151 per passenger.Departing Fri, Aug 8, returning Mon, Aug 18.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Las Vegas Harry Reid International on Fri, Aug 8, arriving in Knoxville.Inbound direct flight with Allegiant Air departing from Knoxville on Mon, Aug 18, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From $151, select.

Knoxville.$156 per passenger.Departing Thu, Oct 2, returning Mon, Oct 13.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Las Vegas Harry Reid International on Thu, Oct 2, arriving in Knoxville.Inbound direct flight with Allegiant Air departing from Knoxville on Mon, Oct 13, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From $156, select.

Knoxville.$160 per passenger.Departing Fri, Aug 29, returning Mon, Sep 15.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Las Vegas Harry Reid International on Fri, Aug 29, arriving in Knoxville.Inbound direct flight with Allegiant Air departing from Knoxville on Mon, Sep 15, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From $160, select.

Knoxville.$200 per passenger.Departing Fri, Jan 23, returning Mon, Jan 26.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Las Vegas Harry Reid International on Fri, Jan 23, arriving in Knoxville.Inbound direct flight with Allegiant Air departing from Knoxville on Mon, Jan 26, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From $200, select.

Knoxville.$266 per passenger.Departing Fri, Nov 21, returning Mon, Dec 8.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Las Vegas Harry Reid International on Fri, Nov 21, arriving in Knoxville.Inbound direct flight with Allegiant Air departing from Knoxville on Mon, Dec 8, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From $266, select.

Knoxville.$267 per passenger.Departing Fri, Nov 21, returning Mon, Nov 24.Round-trip flight with Allegiant Air.Outbound direct flight with Allegiant Air departing from Las Vegas Harry Reid International on Fri, Nov 21, arriving in Knoxville.Inbound direct flight with Allegiant Air departing from Knoxville on Mon, Nov 24, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From $267, select.

Find the cheapest month to fly from Las Vegas to Knoxville

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

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Direct flights from Las Vegas to Knoxville

Las Vegas to Knoxville: Alternative routes

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

Las Vegas to Knoxville: Flight information

The things to know before you go.

Cheapest flight found	$139
Cheapest month to fly	September
Average flight time	3 hrs, 53 mins
Most popular airline	Allegiant Air
Average flights per week	3

Finding cheap flights from Las Vegas to Knoxville: Frequently asked questions

How much are round-trip flights from Las Vegas to Knoxville?

The best price we found for a round-trip flight from Las Vegas to Knoxville is $139. 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.

How long does it take to fly from Las Vegas to Knoxville?

3 hours and 53 minutes is the average flight time from Las Vegas to Knoxville.

Which airlines fly direct from Las Vegas to Knoxville?

Allegiant Air flies direct from Las Vegas to Knoxville.

How many flights are there a week from Las Vegas to Knoxville?

There are 3 flights per week flying from Las Vegas to Knoxville, as of July 2025.

When is the cheapest time to fly from Las Vegas to Knoxville?

The cheapest month to fly from Las Vegas to Knoxville is usually September.

Which upcoming date is cheapest to fly from Las Vegas to Knoxville Airport on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Las Vegas to Knoxville Airport on Friday, September 26, 2025.

Can I get a direct flight from Las Vegas to Knoxville Airport?

Yes – the average flight time is 3 hours and 53 minutes.

How can I find the best flight deal to Knoxville?

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.

When is the best time to book flights to Knoxville?

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.

Which is the cheapest airline to fly with from Las Vegas to Knoxville?

The cheapest airline that flies to Knoxville is Allegiant Air.

Traveling from Las Vegas to McGhee Tyson Airport (TYS): What you need to know

Your travels get underway at Las Vegas's main airport, Harry Reid Airport (formerly McCarran Airport) (LAS). Check out the options for booking a flight from Las Vegas to McGhee Tyson Airport (TYS) departing from this base.
Book a direct Las Vegas to McGhee Tyson Airport flight and you'll be in the air for around 3 hours 55 minutes.
The timezone in Knoxville is UTC-4, which is three hours ahead of Las Vegas. McGhee Tyson Airport is located in Knoxville.
Harry Reid Airport (formerly McCarran Airport) (LAS) to McGhee Tyson Airport (TYS) is the most popular route, with 2 direct services each week. Travel from LAS to TYS on Allegiant Air's 6:05am flight.
Get to the airport on time so you don't miss your flight from Las Vegas to TYS. Be there at least two hours ahead for international flights and an hour early for domestic departures to prevent a last-minute sprint to your gate.
With more people on the move during high season, it's smart to get to your terminal even earlier. Two hours for domestic flights and up to four for international journeys will allow for extra wait times.

Airports in Las Vegas

Harry Reid Airport (formerly McCarran Airport) (LAS)

Enjoy an uninterrupted journey from Harry Reid Airport (formerly McCarran Airport) (LAS). Direct flights from Las Vegas to McGhee Tyson Airport (TYS) are available from here.
Allegiant Air is a well-known carrier that operates direct flights from Las Vegas to McGhee Tyson Airport departing from LAS.
Most travelers prefer to fly with Allegiant Air from LAS to TYS.
Allegiant Air stands out as the most punctual carrier on this route, with 94.12% of its services arriving as scheduled.
The journey from central Las Vegas to LAS takes about 1 hour on public transport. If you drive, ride-share or take a cab, you'll cover the 19 kilometers in 15 minutes or so, depending on traffic.
Want a leisurely start to your break? Stay near Harry Reid Airport (formerly McCarran Airport). Whether you're boarding an early flight from Las Vegas to McGhee Tyson Airport or want to avoid feeling rushed, these hotels are the ideal choice:
Harry Reid Airport (formerly McCarran Airport) has a strong on-time record, so flight disruptions are less likely. Departures from LAS touch down on schedule 82.07% of the time.
You'll find LAS at 5757 Wayne Newton Boulevard.

About McGhee Tyson Airport (TYS)

The last thing you want is a long journey to your hotel if you're arriving on a late flight from Las Vegas to McGhee Tyson Airport. Check in to one of these accommodation options near TYS instead:
Go wherever you want, whenever you want with a McGhee Tyson Airport rental car. Pick up a set of wheels from Budget, Alamo or Avis and venture far and wide through Knoxville and beyond.
Lock in the best deal by booking your ride around three weeks ahead of your Las Vegas to McGhee Tyson Airport flight.
You'll find TYS at 2055 Alcoa Highway.

How to find the cheapest flights from Las Vegas to McGhee Tyson Airport (TYS)

Right now, $64 is the best price we've found for a one-way ticket from Las Vegas to McGhee Tyson Airport. The cheapest price for a return flight is $139. Remember fares may change due to availability at the time of booking.
To score cheap flights from Las Vegas to TYS, book your plane ticket four months before your departure date.
The best month for scoring cheap Las Vegas to McGhee Tyson Airport tickets is September. Use the 'Whole month' tool to compare prices, then select the dates with the lowest fares.
You don't need to check every day to find out if fares have dropped when you create a Price Alert. We'll notify you as soon as a lower fare pops up on plane tickets from Las Vegas to TYS.
Find an affordable flight from Las Vegas to McGhee Tyson Airport by using filters. Choose your preferred duration, number of stops and airlines, then sort the results by 'Cheapest' for the best deals.

The best time to fly from Las Vegas to McGhee Tyson Airport (TYS)

February is the quietest month for flights from Las Vegas to McGhee Tyson Airport (TYS), while July is the busiest. Find the best time to visit Knoxville based on whether you like a laid-back vibe or a more bustling atmosphere.
Lock in a Las Vegas to TYS plane ticket departing in July if you want to visit the city during its warmest month. Expect temperatures in Knoxville to range from 17ºC (63ºF) to 32ºC (90ºF).
January sees temperatures of between -6ºC (21ºF) and 11ºC (52ºF). Look for cheap tickets from Las Vegas to McGhee Tyson Airport around that time if you'd rather travel in cooler conditions.

More about Knoxville

When it comes to searching for somewhere to rest your head, you'll find the best stays in Knoxville right here. Browse these options as soon as you've booked your flight from Las Vegas to McGhee Tyson Airport:
You'll find loads of terrific things to do in Knoxville when you're ready to see the sights. Start exploring at Ijams Nature Center followed by McClung Museum of Natural History and Culture and World's Fair Park.

Explore more of the United States

You've visited Knoxville, now it's time to discover other parts of the United States. Travel about 290 kilometers east to Charlotte to tick off its popular sights. From Bechtler Museum of Modern Art to Discovery Place and NASCAR Hall of Fame, you'll have a packed itinerary ahead.
Nashville is another well-known destination in the United States and is around 257 kilometers west of Knoxville. No journey is complete without seeing Grand Ole Opry, Country Music Hall of Fame and Museum and The Johnny Cash Museum.