How long is the flight from Knoxville to Lisbon?

There are many flights that can get you from Knoxville to Lisbon in 18h 50m. Fly via United Airlines or Virgin Atlantic 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. Check Cheapflights for deals on United Airlines for as low as $629. You may be able to fly from Knoxville to Lisbon for 59% less than the average price by searching for these airlines.

In terms of precipitation, rainfall in Lisbon ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Lisbon when rainfall is around 0.2 in.

If weather is an important factor for your trip to Lisbon, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Knoxville to Lisbon as you normally would.

Most accurate provider : When it comes to deals on Knoxville-Lisbon flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Knoxville-Lisbon flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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.

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.

$441+ Cheap Flights from Knoxville to Lisbon

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Cheap flight deals from Knoxville to Lisbon

Cheapest

Best

Last-minute

One-way

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 October 25, 2026.

Tue 12/86:17 pm -

2 stops33h 43m

Tue 12/1510:00 am -

2 stops37h 22m

Deal found 10/23

$742

Tue 12/89:45 am -

1 stop19h 20m

Tue 12/1512:50 pm -

2 stops33h 10m

Deal found 10/24

$764

Tue 12/812:42 pm -

1 stop15h 23m

Tue 12/1511:05 am -

1 stop14h 53m

Deal found 10/23

$766

Wed 11/1811:20 am -

1 stop15h 50m

Wed 11/255:00 am -

2 stops23h 59m

Deal found 10/21

$767

Tue 12/87:45 pm -

2 stops22h 45m

Tue 12/155:00 am -

2 stops23h 59m

Deal found 10/24

$768

Tue 12/81:55 pm -

2 stops13h 15m

Tue 12/1510:15 am -

1 stop15h 22m

Deal found 10/23

$769

Mon 12/79:45 am -

1 stop19h 35m

Mon 12/1412:25 pm -

2 stops40h 34m

Deal found 10/23

$798

Sat 12/52:07 pm -

1 stop15h 13m

Sat 12/125:00 am -

2 stops23h 59m

Deal found 10/21

$821

Best flights from Knoxville to Lisbon
Discover carefully curated flight deals from Knoxville to Lisbon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 25, 2026.

Tue 12/81:55 pm -

2 stops13h 15m

Tue 12/1510:15 am -

1 stop15h 22m

Deal found 10/23

$769

Sun 2/145:57 pm -

2 stops16h 13m

Sun 2/215:00 am -

2 stops17h 13m

Deal found 10/25

$780

Sun 2/147:35 pm -

2 stops31h 35m

Sun 2/2110:40 am -

2 stops39h 42m

Deal found 10/22

$782

Sun 2/147:40 am -

1 stop20h 25m

Sun 2/2111:05 am -

1 stop14h 44m

Deal found 10/22

$788

Sat 12/52:07 pm -

1 stop15h 13m

Sat 12/125:00 am -

2 stops23h 59m

Deal found 10/21

$821

Fri 3/56:15 am -

2 stops22h 05m

Sat 3/1311:20 am -

2 stops40h 39m

Deal found 10/24

$835

Last-minute flights from Knoxville to Lisbon
Discover last-minute flight deals from Knoxville to Lisbon. Data last updated October 25, 2026 and is based on user searches.

Wed 10/289:10 am -

1 stop22h 55m

Thu 10/296:35 pm -

1 stop21h 24m

Deal found 10/21

$1,769

Sun 11/87:35 pm -

1 stop9h 30m

Mon 11/93:55 pm -

2 stops33h 59m

Deal found 10/20

$1,573

Sun 11/87:00 am -

2 stops20h 10m

Mon 11/97:50 pm -

2 stops28h 46m

Deal found 10/20

$1,791

Sun 11/155:45 am -

1 stop23h 20m

Thu 11/198:55 am -

2 stops54h 49m

Deal found 10/24

$1,244

Wed 11/1811:20 am -

1 stop15h 50m

Wed 11/255:00 am -

2 stops23h 59m

Deal found 10/21

$767

Wed 11/1811:20 am -

2 stops14h 35m

Wed 11/2511:20 am -

3 stops17h 39m

Deal found 10/21

$876

Find flight deals from Knoxville to Lisbon

Most accurate provider	Ovago 3 stars
Most trusted provider	Ovago 3 stars
Round-trip from	$730 (United Airlines)
One-way from	$441 (Kiwi.com)
Popular in	December
Cheapest in	January
Average price	$1,505

Provider with most accurate pricing for Knoxville McGhee Tyson-Lisbon Humberto Delgado flight deals.

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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

High demand for flights, 8% potential price rise

Search Deals

Cheapest flight prices on average. 6% potential price decrease ($72 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Thu 12/3

8:30 am-5:35 am

1 stop16h 05m

Lisbon Humberto Delgado

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$441

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Tue 12/8

1:55 pm-8:10 am

2 stops13h 15m

Lisbon Humberto Delgado

Tue 12/15

10:15 am-8:37 pm

1 stop15h 22m

$769

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Sun 2/14

5:57 pm-3:10 pm

2 stops16h 13m

Lisbon Humberto Delgado

Sun 2/21

5:00 am-5:13 pm

2 stops17h 13m

$780

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Sun 2/14

7:35 pm-8:10 am

2 stops31h 35m

Lisbon Humberto Delgado

Sun 2/21

10:40 am-9:22 pm

2 stops39h 42m

$782

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Sun 2/14

7:40 am-9:05 am

1 stop20h 25m

Lisbon Humberto Delgado

Sun 2/21

11:05 am-8:49 pm

1 stop14h 44m

$788

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Sat 12/5

2:07 pm-10:20 am

1 stop15h 13m

Lisbon Humberto Delgado

Sat 12/12

5:00 am-11:59 pm

2 stops23h 59m

$821

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Fri 3/5

6:15 am-9:20 am

2 stops22h 05m

Lisbon Humberto Delgado

Sat 3/13

11:20 am-10:59 pm

2 stops40h 39m

$835

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Sorted by cheapest first

Compare providers for flights from Knoxville to Lisbon

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Lisbon in October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
Ovago	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust 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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Knoxville-Lisbon flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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.

TYS-LIS

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

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

Airfare is below average for this route at the moment.

Knoxville to Lisbon flights typically cost between $1,163 and $1,276 in April.
The cheapest round-trip price found within the last 5 days was $730 on United Airlines (Apr 20-Apr 28).

Reviews of airlines servicing Lisbon

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

7.3

Good

10,440 reviews

Reviews

1 / 20

8.0

Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.

United Airlines

7.3

Good

10,440 reviews

United Airlines

7.3

Good

10,440 reviews

Reviews

1 / 20

8.0

Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.

British Airways

6.7

Okay

8,268 reviews

United Airlines

7.3

Good

10,440 reviews

Reviews

1 / 20

8.0

Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.

Related info for your journey

How long is the flight from Knoxville to Lisbon?
There are many flights that can get you from Knoxville to Lisbon in 18h 50m. Fly via United Airlines or Virgin Atlantic 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. Check Cheapflights for deals on United Airlines for as low as $629. You may be able to fly from Knoxville to Lisbon for 59% 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.

See more FAQs

Fátima

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Top 2 airlines flying from Knoxville to Lisbon

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest$475	Average$1,166	FlexibilityNo cancel fee	On-time70%
United Airlines	Cheapest$629	Average$1,525	FlexibilityNo cancel fee	On-time69%

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$441+ 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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Knoxville to Lisbon with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Knoxville to Lisbon

Cheapest flights from Knoxville to LisbonExplore 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 October 25, 2026.

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 October 25, 2026.

Best flights from Knoxville to LisbonDiscover carefully curated flight deals from Knoxville to Lisbon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 25, 2026.

Discover carefully curated flight deals from Knoxville to Lisbon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 25, 2026.

Last-minute flights from Knoxville to LisbonDiscover last-minute flight deals from Knoxville to Lisbon. Data last updated October 25, 2026 and is based on user searches.

Discover last-minute flight deals from Knoxville to Lisbon. Data last updated October 25, 2026 and is based on user searches.

One-way flights from Knoxville to LisbonSearch for one-way flight options from Knoxville to Lisbon. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.

Search for one-way flight options from Knoxville to Lisbon. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.

Find flight deals from Knoxville to Lisbon

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Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

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Cheapflights Fare Finder

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

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 October.

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.

Cheapflights Insights

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

Airfare is below average for this route at the moment.

Knoxville to Lisbon flights typically cost between $1,163 and $1,276 in April.The cheapest round-trip price found within the last 5 days was $730 on United Airlines (Apr 20-Apr 28).

Reviews of airlines servicing Lisbon

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.

Related info for your journey

How long is the flight from Knoxville to Lisbon?

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

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

How can I find direct flights from Knoxville to Lisbon?

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

Traveling to a place near Lisbon?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Knoxville to Lisbon

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

Complete your trip

Complete your trip to Lisbon by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Knoxville to Lisbon by cabin class

Find flights from Knoxville to Lisbon, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Lisbon

Explore flights to Lisbon departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 25, 2026.

Knoxville and Lisbon flights

Browse other Knoxville and Lisbon flight options. Last updated on October 25, 2026.

Other flights from Knoxville

Browse through other flights departing from Knoxville. Flights are based on user searches made on Cheapflights and were last updated on October 25, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

Top 2 airlines flying from Knoxville to Lisbon

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Book with Flexibility

Travel Smart

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 October 25, 2026.

Best flights from Knoxville to Lisbon
Discover carefully curated flight deals from Knoxville to Lisbon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 25, 2026.

Last-minute flights from Knoxville to Lisbon
Discover last-minute flight deals from Knoxville to Lisbon. Data last updated October 25, 2026 and is based on user searches.

One-way flights from Knoxville to Lisbon
Search for one-way flight options from Knoxville to Lisbon. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.

Knoxville to Lisbon flights typically cost between $1,163 and $1,276 in April.
The cheapest round-trip price found within the last 5 days was $730 on United Airlines (Apr 20-Apr 28).