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Lisbon

$599+ Cheap flights from Knoxville (TYS) to Lisbon (LIS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — LIS
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$589
(FlightHub)

Popular in

June

Cheapest in

January

Average price

$931
From Knoxville McGhee Tyson to Lisbon Humberto Delgado
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Highest demand for flights based on searches. 33% potential increase in price ($475 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($71 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/11. 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 10/247:00 amTYS - LIS
2 stops20h 20mUnited Airlines
Tue 11/45:00 amLIS - TYS
2 stops23h 59mUnited Airlines
Deal found 9/11$599
This KAYAK deal was found by Cheapflights users on 9/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/55:53 pmTYS - LIS
2 stops22h 57mLufthansa
Wed 10/155:05 amLIS - TYS
2 stops17h 13mLufthansa
Deal found 9/10$614
This Ovago deal was found by Cheapflights users on 9/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/242:13 pmTYS - LIS
1 stop13h 52mBritish Airways
Tue 11/46:30 amLIS - TYS
2 stops19h 54mBritish Airways
Deal found 9/10$621
This FlightHub deal was found by Cheapflights users on 9/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/133:51 pmTYS - LIS
2 stops18h 49mScandinavian Airlines
Sun 11/163:55 pmLIS - TYS
2 stops36h 57mScandinavian Airlines
Deal found 9/11$625
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Thu 11/139:50 amTYS - LIS
1 stop19h 25mUnited Airlines
Sun 11/165:00 amLIS - TYS
2 stops23h 59mUnited Airlines
Deal found 9/11$649
This KAYAK deal was found by Cheapflights users on 9/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/25:53 pmTYS - LIS
2 stops24h 37mLufthansa
Wed 10/155:05 amLIS - TYS
2 stops17h 13mLufthansa
Deal found 9/10$678
This Ovago deal was found by Cheapflights users on 9/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:37 pmTYS - LIS
2 stops33h 13mBritish Airways
Sun 11/28:45 pmLIS - TYS
2 stops29h 39mBritish Airways
Deal found 9/10$716
This Ovago deal was found by Cheapflights users on 9/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/302:34 pmTYS - LIS
2 stops18h 51mBritish Airways
Tue 10/74:30 pmLIS - TYS
2 stops29h 21mBritish Airways
Deal found 9/10$743
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Wed 10/110:51 amTYS - LIS
2 stops18h 39mUnited Airlines
Thu 10/165:05 amLIS - TYS
2 stops22h 45mUnited Airlines
Deal found 9/10$770
This KAYAK deal was found by Cheapflights users on 9/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/55:53 pmTYS - LIS
2 stops22h 57mLufthansa
Fri 10/175:05 amLIS - TYS
2 stops17h 13mLufthansa
Deal found 9/10$793
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 10/110:51 amTYS - LIS
2 stops18h 39mUnited Airlines
Tue 10/145:05 amLIS - TYS
2 stops22h 45mUnited Airlines
Deal found 9/9$852
This KAYAK deal was found by Cheapflights users on 9/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/25:53 pmTYS - LIS
2 stops24h 37mLufthansa
Fri 10/175:05 amLIS - TYS
2 stops17h 13mLufthansa
Deal found 9/10$857

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 September 11, 2025.
Use the filters below to find and compare flights from Knoxville to Lisbon that are best for you.

Fly from

Knoxville

Fly to

Lisbon

Route

Depart

Return

Price

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

6:45 am-9:20 am

2 stops21h 35m

Lisbon Humberto Delgado

Sat 1/17

11:20 am-10:32 am

2 stops28h 12m

$612

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 11/13

9:50 am-10:15 am

1 stop19h 25m

Lisbon Humberto Delgado

Sun 11/16

5:00 am-11:59 pm

2 stops23h 59m

$649

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sun 10/26

9:00 am-5:35 am

1 stop16h 35m

Lisbon Humberto Delgado

Sun 11/2

9:05 pm-1:01 pm

2 stops44h 56m

$863

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 10/1

10:51 am-10:30 am

2 stops18h 39m

Lisbon Humberto Delgado

Thu 10/16

6:15 am-10:50 pm

2 stops21h 35m

$863

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 10/3

3:09 pm-11:10 pm

2 stops27h 01m

Lisbon Humberto Delgado

Thu 10/16

7:20 am-8:44 pm

2 stops18h 24m

$866

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 10/4

7:10 am-3:15 pm

2 stops27h 05m

Lisbon Humberto Delgado

Thu 10/16

5:30 pm-11:16 pm

1 stop34h 46m

$880

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 10/4

2:34 pm-11:10 pm

2 stops27h 36m

Lisbon Humberto Delgado

Thu 10/16

6:35 am-8:44 pm

2 stops19h 09m

$956

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 10/2

4:49 pm-11:05 pm

2 stops25h 16m

Lisbon Humberto Delgado

Thu 10/16

6:35 am-8:44 pm

2 stops19h 09m

$956

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 10/1

7:00 am-8:20 am

2 stops20h 20m

Lisbon Humberto Delgado

Fri 10/17

12:20 pm-10:10 am

2 stops26h 50m

$956

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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, January is the cheapest month in which you can book a flight from Knoxville to Lisbon (average of $612). Flying from Knoxville to Lisbon in June is currently the most expensive (average of $1,127). 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.

What is the cheapest time of day to fly from TYS to LIS?

Find hourly flight availability from Knoxville to Lisbon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

When flying from Knoxville to Lisbon, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 35% versus a flight in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from Knoxville to Lisbon. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Knoxville to Lisbon flight should consider departing on Monday evenings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 September 11, 2025.
Peruse reviews from past customers who have flown with United Airlines, American 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
8,937 reviews

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,937 reviews

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.7
Okay
7,361 reviews
United Airlines
7.4
Good
8,937 reviews

Overall

7.4

Comfort

7.3

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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 21h 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 $589, 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 American Airlines and United Airlines - these airlines can fly you to your destination from $602 and $603, respectively. You may be able to fly from Knoxville to Lisbon for 38% 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, January is the cheapest month in which you can book a flight from Knoxville to Lisbon (average of $612). Flying from Knoxville to Lisbon in June is currently the most expensive (average of $1,127). 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
Sintra
Fátima
Oeiras
Beja
Nazaré
Ericeira
Costa da Caparica
Torres Vedras
Sesimbra
Colares

Browse thousands of different options on Cheapflights for your next trip

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$589Average$896FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$602Average$943FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$603Average$837FlexibilityNo cancel feeOn-time69%

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