Lisbon

$472+ Cheap flights from Knoxville (TYS) to Lisbon (LIS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — LIS
May 23 — May 301
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Cheap flight deals from Knoxville to Lisbon

Cheapest flights from Knoxville to Lisbon
Explore the most affordable flight options available from Knoxville to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.

This Booking.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/84:15 pm
TYS
-
LIS
2 stops14h 50m
British Airways
Sat 11/1412:55 pm
LIS
-
TYS
2 stops34h 06m
British Airways
Deal found 4/21$773
This United Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:57 pm
TYS
-
LIS
2 stops34h 23m
United Airlines
Wed 9/3012:20 pm
LIS
-
TYS
1 stop16h 35m
United Airlines
Deal found 4/20$824
This CheapOair deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1910:00 am
TYS
-
LIS
2 stops42h 20m
Multiple Airlines
Wed 9/305:05 am
LIS
-
TYS
2 stops23h 50m
Multiple Airlines
Deal found 4/21$860
This CheapOair deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:30 pm
TYS
-
LIS
1 stop9h 35m
British Airways
Wed 9/3011:05 am
LIS
-
TYS
1 stop15h 49m
British Airways
Deal found 4/21$957
This American Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:21 am
TYS
-
LIS
1 stop21h 44m
American Airlines
Wed 9/306:35 am
LIS
-
TYS
2 stops17h 29m
American Airlines
Deal found 4/23$980
This American Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/46:30 pm
TYS
-
LIS
1 stop9h 35m
American Airlines
Wed 7/1511:05 am
LIS
-
TYS
2 stops17h 54m
American Airlines
Deal found 4/21$1,056

Find flight deals from Knoxville to Lisbon

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Lisbon (LIS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$824
(United Airlines)

One-way from

$472
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$965
Provider with most accurate pricing for Knoxville McGhee Tyson-Lisbon Humberto Delgado flight deals.
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Lisbon Humberto Delgado flights.
From Knoxville McGhee Tyson to Lisbon Humberto Delgado
One-way flight from Knoxville McGhee Tyson to Lisbon Humberto Delgado
Highest demand for flights based on searches. 31% potential increase in price ($434 potential increase over avg. RT price).
Cheapest flight prices on average. 6% potential price decrease ($62 potential savings vs. average RT price).
Average for round-trip flights in April 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville to Lisbon that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 23, 2026.
Use the filters below to find and compare flights from Knoxville to Lisbon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 9/19

7:19 pm-9:20 am

2 stops33h 01m

Lisbon Humberto Delgado

Wed 9/30

12:20 pm-11:55 pm

1 stop16h 35m

$824
Quickest round-trip

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 7/4

6:30 pm-9:05 am

1 stop9h 35m

Lisbon Humberto Delgado

Wed 7/15

11:05 am-5:57 pm

1 stop11h 52m

$1,081

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 5/13

5:20 pm-5:50 pm

2 stops19h 30m

Lisbon Humberto Delgado

Tue 6/23

5:00 am-9:41 pm

2 stops21h 41m

$1,093

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 9/19

6:21 am-9:05 am

1 stop21h 44m

Lisbon Humberto Delgado

Wed 9/30

11:05 am-9:54 pm

1 stop15h 49m

$1,102

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 7/24

6:30 am-11:05 am

2 stops23h 35m

Lisbon Humberto Delgado

Sun 8/2

1:00 pm-11:19 am

2 stops27h 19m

$1,144
Cheapest one-way

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 5/8

7:10 am-5:55 pm

3 stops53h 45m

$472

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Mon 5/4

5:54 pm-2:55 pm

2 stops16h 01m

$558
Quickest one-way

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Mon 5/4

2:49 pm-9:05 am

1 stop13h 16m

$619

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 5/16

11:44 am-2:55 pm

2 stops22h 11m

$638

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 5/21

5:59 pm-6:45 pm

2 stops19h 46m

$643

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Compare providers for flights from Knoxville to Lisbon

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Lisbon in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Knoxville-Lisbon flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Lisbon flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Lisbon flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Knoxville-Lisbon flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Knoxville-Lisbon flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Knoxville to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon from Knoxville with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Knoxville to Lisbon?

Currently, February is the cheapest month in which you can book a flight from Knoxville to Lisbon (average of $480). Flying from Knoxville to Lisbon in June is currently the most expensive (average of $1,615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Knoxville to Lisbon?

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Lisbon. Reviews last updated April 23, 2026.
Peruse reviews from past customers who have flown with United Airlines,American Airlines, andBritish Airways from Knoxville to Lisbon to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

Related info for your journey

Find useful and relevant information for your journey from Knoxville to Lisbon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • How long is the flight from Knoxville to Lisbon?

    There are many flights that can get you from Knoxville to Lisbon in 9h 35m. Fly via United Airlines or British Airways to get the fastest option. The distance from Knoxville to Lisbon is about 3997 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Knoxville to Lisbon round-trip?

    Currently priced at $475, British Airways will fly you from Knoxville to Lisbon and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and American Airlines - these airlines can fly you to your destination from $633 and $654, respectively. You may be able to fly from Knoxville to Lisbon for 49% less than the average price by searching for these airlines.

  • Can I find deals for flights from Knoxville to Lisbon that include hotel bookings?

    Yes. In addition to deals on Knoxville to Lisbon flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Knoxville to Lisbon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Knoxville to Lisbon.

  • Can I find deals for business class flights from Knoxville to Lisbon?

    Yes. Cheapflights offers flight deals from Knoxville to Lisbon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Knoxville to Lisbon?

    Currently, February is the cheapest month in which you can book a flight from Knoxville to Lisbon (average of $480). Flying from Knoxville to Lisbon in June is currently the most expensive (average of $1,615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Fátima
Ericeira
Oeiras
Beja
Costa da Caparica
Torres Vedras
Nazaré
Colares
Sesimbra

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Alternative routes for Knoxville to Lisbon

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Knoxville to Lisbon

Discover the top 3 airlines that operate flights from Knoxville to Lisbon. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$475Average$949FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$633Average$965FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$654Average$993FlexibilityNo cancel feeOn-time71%

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