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Lisbon

$323+ 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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — LIS
Jul 12 — Jul 191
Sun 7/12
Sun 7/19
1 adult, Economy
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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 June 12, 2026.

This United Airlines deal was found by Cheapflights users on 6/7. 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.
Mon 12/77:35 pm
TYS
-
LIS
1 stop9h 40m
United Airlines
Thu 12/101:00 pm
LIS
-
TYS
2 stops35h 34m
United Airlines
Deal found 6/7$751
This Air Canada deal was found by Cheapflights users on 6/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:00 pm
TYS
-
LIS
2 stops36h 05m
Air Canada
Fri 9/2511:25 am
LIS
-
TYS
2 stops41h 34m
Air Canada
Deal found 6/9$847
This United Airlines deal was found by Cheapflights users on 6/12. 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 9/197:20 pm
TYS
-
LIS
2 stops32h 00m
United Airlines
Wed 9/305:05 am
LIS
-
TYS
2 stops20h 55m
United Airlines
Deal found 6/12$853
This Booking.com deal was found by Cheapflights users on 6/12. 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.
Sat 10/249:45 am
TYS
-
LIS
2 stops45h 15m
Air Canada
Sat 10/311:00 pm
LIS
-
TYS
2 stops39h 37m
Air Canada
Deal found 6/12$865
This Air Canada deal was found by Cheapflights users on 6/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:00 pm
TYS
-
LIS
2 stops36h 05m
Air Canada
Tue 9/221:00 pm
LIS
-
TYS
2 stops30h 37m
Air Canada
Deal found 6/9$881
This United Airlines deal was found by Cheapflights users on 6/12. 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 10/247:25 pm
TYS
-
LIS
2 stops35h 35m
United Airlines
Sat 10/3111:55 am
LIS
-
TYS
1 stop15h 42m
United Airlines
Deal found 6/12$886
This Air Canada deal was found by Cheapflights users on 6/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:45 am
TYS
-
LIS
2 stops22h 35m
Air Canada
Fri 9/2511:25 am
LIS
-
TYS
2 stops41h 34m
Air Canada
Deal found 6/9$903
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Fri 10/25:45 am
TYS
-
LIS
2 stops21h 35m
United Airlines
Fri 10/911:25 am
LIS
-
TYS
2 stops32h 17m
United Airlines
Deal found 6/11$904
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Mon 9/147:20 pm
TYS
-
LIS
1 stop10h 10m
United Airlines
Tue 9/2211:25 am
LIS
-
TYS
2 stops34h 33m
United Airlines
Deal found 6/9$907

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 June 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$751
(United Airlines)

One-way from

$359
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,450
Provider with most accurate pricing for Knoxville McGhee Tyson-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Lisbon Humberto Delgado flights.
Search Deals
From Knoxville McGhee Tyson to Lisbon Humberto Delgado
Search Deals
One-way flight from Knoxville McGhee Tyson to Lisbon Humberto Delgado
Search Deals
Highest demand for flights based on searches. 27% potential increase in price ($360 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

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 June 12, 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
Quickest round-trip

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Mon 12/7

7:35 pm-10:15 am

1 stop9h 40m

Lisbon Humberto Delgado

Thu 12/10

1:00 pm-7:34 pm

2 stops35h 34m

$751

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 9/19

7:20 pm-8:20 am

2 stops32h 00m

Lisbon Humberto Delgado

Wed 9/30

5:05 am-9:00 pm

2 stops20h 55m

$853

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 10/24

9:45 am-12:00 pm

2 stops45h 15m

Lisbon Humberto Delgado

Sat 10/31

1:00 pm-12:37 am

2 stops39h 37m

$865

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 10/16

9:45 am-9:20 am

2 stops18h 35m

Lisbon Humberto Delgado

Sun 10/25

1:00 pm-11:37 pm

2 stops38h 37m

$910

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Tue 9/15

7:40 am-8:00 am

2 stops19h 20m

Lisbon Humberto Delgado

Thu 9/24

12:45 pm-11:04 am

2 stops27h 19m

$932

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Tue 7/7

6:00 am-11:05 am

2 stops24h 05m

Lisbon Humberto Delgado

Tue 7/14

11:25 am-11:54 pm

2 stops41h 29m

$946
Cheapest one-way

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 10/16

7:00 am-11:25 pm

2 stops35h 25m

$323

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 10/29

6:30 am-8:40 am

3 stops46h 10m

$384

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 7/24

7:20 pm-11:30 pm

2 stops47h 10m

$448

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 10/16

5:45 am-10:30 am

1 stop23h 45m

$526

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 12 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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 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 $1,450). 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 June 12, 2026.
Peruse reviews from past customers who have flown with United Airlines and British 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.
United Airlines
7.4
Good
9,810 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,810 reviews
United Airlines
7.4
Good
9,810 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
British Airways
6.7
Okay
8,046 reviews
United Airlines
7.4
Good
9,810 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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 40m. Fly via United Airlines to get the fastest option. The distance from Knoxville to Lisbon is about 3997 mi.

  • 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. Check Cheapflights for deals on United Airlines for as low as $633. You may be able to fly from Knoxville to Lisbon for 50% 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 $1,450). 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
Torres Vedras
Nazaré
Colares
Sesimbra

Browse thousands of different options on Cheapflights for your next trip

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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.
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Top 2 airlines flying from Knoxville to Lisbon

Discover the top 2 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 June 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$475Average$1,054FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$633Average$965FlexibilityNo cancel feeOn-time69%

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