TYS - LIS

$270 Find Cheap Flights from Knoxville to Lisbon

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Knoxville to Lisbon departing on 7/16. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Lisbon

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Knoxville to Lisbon, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Knoxville to Lisbon, as well as popular online travel agencies
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Cheap Flights from Knoxville to Lisbon (TYS-LIS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Knoxville to Lisbon that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Knoxville to Lisbon

Wed, Aug 6 - Tue, Aug 19
 Logo
7:10 am - 5:30 amTYS-LIS
17h 20m1 stop
 Logo
9:15 pm - 1:02 pmLIS-TYS
44h 47m2 stops
Mon, Aug 4 - Tue, Aug 19
 Logo
7:15 am - 5:30 amTYS-LIS
17h 15m1 stop
 Logo
9:15 pm - 1:02 pmLIS-TYS
44h 47m2 stops
Fri, Oct 24 - Tue, Nov 4
United Airlines Logo
7:00 am - 8:20 amTYS-LIS
20h 20m2 stops
United Airlines Logo
5:00 am - 8:20 pmLIS-TYS
20h 20m2 stops
$648United Airlines
Find Deal
Fri, Oct 24 - Tue, Nov 4
British Airways Logo
4:01 pm - 9:05 amTYS-LIS
12h 04m1 stop
British Airways Logo
11:10 am - 5:39 pmLIS-TYS
11h 29m1 stop
$654British Airways
Find Deal
Mon, Oct 13 - Fri, Oct 24
United Airlines Logo
9:55 am - 11:05 amTYS-LIS
20h 10m2 stops
United Airlines Logo
5:05 am - 10:50 pmLIS-TYS
22h 45m2 stops
$680United Airlines
Find Deal
Fri, Oct 24 - Tue, Nov 4
British Airways Logo
6:16 pm - 9:05 amTYS-LIS
9h 49m1 stop
British Airways Logo
8:45 pm - 8:36 pmLIS-TYS
28h 51m2 stops
$681British Airways
Find Deal
Sun, Oct 5 - Wed, Oct 22
Delta Logo
11:30 am - 10:45 amTYS-LIS
18h 15m2 stops
Delta Logo
12:45 pm - 10:13 amLIS-TYS
26h 28m2 stops
$767Delta
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Sun, Oct 5 - Sat, Oct 18
Delta Logo
11:30 am - 10:45 amTYS-LIS
18h 15m2 stops
Delta Logo
12:45 pm - 10:52 pmLIS-TYS
15h 07m2 stops
$798Delta
Find Deal
Sun, Jul 13 - Mon, Jul 21
American Airlines Logo
7:35 am - 9:05 amTYS-LIS
20h 30m1 stop
American Airlines Logo
11:05 am - 8:39 pmLIS-TYS
14h 34m1 stop
$955American Airlines
Find Deal
Sat, Jul 12 - Mon, Jul 21
American Airlines Logo
7:35 am - 9:05 amTYS-LIS
20h 30m1 stop
American Airlines Logo
11:05 am - 8:39 pmLIS-TYS
14h 34m1 stop
$1,015American Airlines
Find Deal
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KAYAK's insights & trends for Knoxville to Lisbon flights

Get data-powered insights and trends into flights from Knoxville to Lisbon to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Knoxville to Lisbon?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Knoxville to Lisbon, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Knoxville to Lisbon is January, where tickets cost $629 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $1,724 and $1,359 respectively.

How far in advance should I book a flight from Knoxville to Lisbon?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Knoxville to Lisbon, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Knoxville to Lisbon, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonJanuary
High seasonMarch
Cheapest flight$270
Best time to beat the crowds with an average 36% drop in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from Knoxville to Lisbon

When to book flights from Knoxville to Lisbon

Are your dates flexible? Find out the best times to travel from Knoxville to Lisbon based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Knoxville to Lisbon

  • What is the cheapest flight from Knoxville to Lisbon?

    In the last 3 days, the lowest price for a flight from Knoxville to Lisbon was $270 for a one-way ticket and $615 for a round-trip.

  • Do I need a passport to fly between Knoxville and Lisbon?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Knoxville and on arrival in Lisbon.

  • Which aircraft models fly most regularly from Knoxville to Lisbon?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Knoxville to Lisbon?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Knoxville and Lisbon, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Knoxville to Lisbon, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Knoxville to Lisbon are United Airlines and American Airlines. With an average price for the route of $867 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $1,061 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Knoxville to Lisbon?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Knoxville to Lisbon.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Knoxville to Lisbon?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Lisbon from Knoxville is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Knoxville to Lisbon?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Lisbon with an airline and back to Knoxville with another airline. Booking your flights between Knoxville and LIS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Knoxville to Lisbon?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Lisbon from Knoxville up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Knoxville to Lisbon

 
See real verified KAYAK customer reviews for airlines flying from Knoxville to Lisbon. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Knoxville to Lisbon? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8809 reviews
6.6Food
7.7Boarding
7.3Comfort
8.1Crew
7.0Entertainment
Airline reviews

Gate agent did not hold flight for connection, provided no assistance to get new flight

2.0 MediocreJack, Jun 2025SAT - IAH
Read more United Airlines reviews

Gate agent did not hold flight for connection, provided no assistance to get new flight

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

United airlines, mediocre at best. No issues , nothing great . Worked for me

Boarding experience was smooth. Flight attendants were friendly and helpful. Entertainment system on the Houston-Edmonton flight did not function for passengers on the left side of the aisle. On the bird's eye flight from Quito to Houston, they should not serve a meal. No one needs to eat after midnight and it is disturbing for those passengers trying to sleep.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

Terrible. Out flight was delayed for 21 (twenty one) hours. United is a joke.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

Loved the staff, boarding and drink options! Wish the comfort of the seat could have been better nevertheless

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

Food was terrible, all served at once, poor quality . Wine and bread offered only once.

I’m impressed that we were on time in Sacramento after having a late departure in Newark and our made it. The staff was friendly and warm.

Cramped seats. FAA should make airlines have more legroom, for even short people complain

5.5 hour delay with no explanation on why, along with no proactive effort to reaccomodate me.

It was one of my worst flight ever. First they were changing the gate for at least 4 times, changing from gate D7 to D12 to D44. Considering the size of the Miami Airport, we are talking about long distance and the train at the airport was not working. Then the flight was delayed around one hour. Then finally we boarded into the plane and when everybody was seated, there was an announcement that there is an issue with one of the tire of the plane, so we all had to get out of the plane with our belongings, to replace the tire. So we had around 2.5-hour delay

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

The plane was probably full boarding was easy. We were able to check our carry-on luggage for free. It was a return flight through Philly to LA. Never saw a stewardess do a demonstration of emergency Procedures. I think my flight was pretty full

More Indian vegetarian food options would have been better Availability of seat selection free of charge 72 hours before departure would be great

This was the second time on BA, food terrible, bathrooms gross,( granted, that was mostly due to the disgusting children urinating all over it)boarding was late and disorganized. No gate issued until last minute st Heathrow, bad system, caused undue stress. Seats were painful, that's what you get for traveling like a poor in economy, right BA? Should have been able to afford business or first class if you want to actually be able to walk upright without back pain after a trip.

This was the second time on BA, food terrible, bathrooms gross, boarding late and disorganized. No gate issued until last minute st Heathrow, bad system, caused undue stress.

The flight was delayed twice and because of that, we missed our connecting flight. British Airways then attempted to put us on the last flight to Milan from London which would have kept us in the airport for 12 hours. We had to speak to several levels of bureaucracy until BA management let us fly on a flight that only kept us in the airport for two hours. If there was an earlier flight, why weren’t we put on that flight from the start? Unacceptable behavior from what was once my favorite carrier.

The payment system was not working so was unable to connect wifi the entire flight

Business class was nothing more than Economy with middle seat empty. Uncomfortable seat and leg room. A mom behind me had a 18 month/2 yr old on her lap, who had his feet on my back all the time- while middle seat remained empty. Pretty much not worth the fare. Very disappointed.

everything to do with KAYAK was terrible. Your customer facing departments are utterly useless, timewasting and unhelpful.

I ordered short ribs for main course. It tasted sweet, really sweet. Horrible.

Our luggage didn’t arrive with us, that puts a damper on the whole trip.

The screen didn’t work and I didn’t get the seat upgrade I paid $300 for. They were no help with that,

Everything you need to know for your flight from Knoxville to Lisbon

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