TYS - LIS

$638 Find Cheap Flights from Knoxville to Lisbon

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Knoxville to Lisbon departing on 12/4. 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

Thu, Dec 4 - Wed, Dec 10
United Airlines Logo
7:25 pm - 10:15 amTYS-LIS
9h 50m1 stop
United Airlines Logo
11:00 am - 5:11 pmLIS-TYS
35h 11m2 stops
$638United Airlines
Find Deal
Thu, Dec 4 - Wed, Dec 10
United Airlines Logo
7:00 am - 8:10 amTYS-LIS
20h 10m2 stops
United Airlines Logo
11:00 am - 5:11 pmLIS-TYS
35h 11m2 stops
$642United Airlines
Find Deal
Thu, Dec 4 - Wed, Dec 10
United Airlines Logo
7:25 pm - 10:15 amTYS-LIS
9h 50m1 stop
United Airlines Logo
5:00 am - 7:29 pmLIS-TYS
19h 29m2 stops
$647United Airlines
Find Deal
Thu, Dec 4 - Wed, Dec 10
British Airways Logo
10:57 am - 9:05 amTYS-LIS
17h 08m1 stop
British Airways Logo
11:15 am - 5:38 pmLIS-TYS
11h 23m1 stop
$650British Airways
Find Deal
Wed, Jan 7 - Sat, Jan 17
British Airways Logo
6:51 pm - 2:50 pmTYS-LIS
14h 59m2 stops
British Airways Logo
8:20 am - 8:43 pmLIS-TYS
17h 23m2 stops
$653British Airways
Find Deal
Sat, Aug 16 - Sun, Aug 24
 Logo
9:55 am - 9:20 amTYS-LIS
42h 25m2 stops
 Logo
6:40 am - 10:37 pmLIS-TYS
44h 57m2 stops
Sat, Aug 16 - Sun, Aug 24
American Airlines Logo
6:12 pm - 9:05 amTYS-LIS
9h 53m1 stop
American Airlines Logo
11:05 am - 11:46 pmLIS-TYS
17h 41m2 stops
$861American Airlines
Find Deal
Thu, Sep 25 - Thu, Oct 2
 Logo
9:00 am - 11:40 amTYS-LIS
21h 40m2 stops
 Logo
10:10 pm - 11:36 pmLIS-TYS
30h 26m3 stops
Thu, Sep 4 - Fri, Sep 12
KLM Logo
11:54 am - 8:00 amTYS-LIS
15h 06m2 stops
KLM Logo
10:00 am - 8:02 pmLIS-TYS
15h 02m2 stops
$932KLM
Find Deal
Thu, Sep 25 - Thu, Oct 2
American Airlines Logo
7:18 am - 9:05 amTYS-LIS
20h 47m1 stop
American Airlines Logo
11:05 am - 5:43 pmLIS-TYS
11h 38m1 stop
$1,000American Airlines
Find Deal
Booking Insights

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.

How much is a round-trip flight from Knoxville to Lisbon?

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.

Good to know

Low seasonJanuary
Cheapest flight$638
Best time to beat the crowds with an average 36% drop in price.
Most popular time to fly and prices are also 24% 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 $638 for a round-trip ticket.

  • 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, oneworld, and SkyTeam are the airline alliances operating flights between Knoxville and Lisbon, with Star Alliance 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 $835 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 $1,015 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 8900 reviews
8.1Crew
6.6Food
7.1Entertainment
7.7Boarding
7.3Comfort
Airline reviews

Terrible. Delayed 7 hours, and cancelled the flight, leaving me stranded and out of pocket $500 for an alternative last minute flight

2.0 MediocreV, Jul 2025MIA - EWR
Read more United Airlines reviews

Terrible. Delayed 7 hours, and cancelled the flight, leaving me stranded and out of pocket $500 for an alternative last minute flight

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

United could have one single once of customer service. No human United employee would help me with the invalid mileage plus number, they said I had to speak with the computer.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

We had to turn around and head back to Manchester. Problem with a plane engine.

Flight was delayed. Staff at the gate effectively and proactively communicated about the delay.

Very poor delay in dfw was really bad n long

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Because of rescheduling, they had to put me on a flight that didn't go through Dallas

It was very difficult to stretch my knee out and I am very short. I also had a torn tendon in my knee which made it extra uncomfortable anyways. My husband is 6'2" and I can't imagine him flying in that plane.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

Couldn’t get the door on the plane to close leading to a nearly 2 hour delay. But, hey at least they didn’t cancel the flight.

Flight was cancelled 3 hrs AFTER etd. Thetefore Missed connection from JFK to New Zealand . No accommodation provided… This cost ne aporox 1000 USD in extra expenses and turned whst should have been a 24 hr trip ftom Boston - New Zealand into a VERY expensive , late 70+ hr nightmare … Complete nonsense!!!

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

Flight was delayed. Though I checked in with BA live chat three times, our special meals were not provided.

My experience with British Airways is excellent, thanks for all 🫶🏻✈️

Old tired plane, Uncomfortable business class seat. Breakfast dreadful and meagre. At least flight was on time!

Safe arrival. Improvement on Time efficiency Effective Communication will be great.

The crew is very friendly and helpful. The food is good for airplane food. The flight is long and hard to sleep. The leg space is great. The plane arrived in plenty of time.

A good flight back to Tampa and thankfully although we had a 90 minute delay because of thunder storms from Charlotte to bottom iof Florida, it was a prudent to avoid these for a comfortable flight as opposed to being tossed around with turbulence.

They removed our booking without telling us. Cost us thousands to book last minute

Enjoyable flight, helpful crew everything was organized to accommodate passengers.

The on flight entertainment system touch screen system and the USB charger did not work on multiple seats on least 4 seats an in different rows. The attendant tried to reset the system but was un successful. I couldn't change my phone to get my ticket for my next flight. This was an international flight I changed seats and the problem was the same. the flight attendant offered his power bank

Captain sick. Unable to get replacement so delayed me 30 hours, many others delayed 54 hours. TOTALLY DESTROYED ALL MY PLANS, including lost my rental car which would now cost over 5 times what I paid so stuck with buses n trains... lost hotel reservations.... HORRIBLE!!!

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