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Lisbon

$799+ Cheap flights from Knoxville (TYS) to Lisbon (LIS)

TYS — LIS
Oct 5 — Oct 121
Mon 10/5
Mon 10/12
1 adult, Economy
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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Knoxville to Lisbon

Cheapest flights from Knoxville to Lisbon

Mon 10/197:25 pm -
1 stop10h 05m
Mon 10/2612:25 pm -
2 stops39h 34m
Deal found 9/4$850
Thu 10/1512:06 pm -
2 stops18h 09m
Thu 10/225:00 am -
2 stops23h 02m
Deal found 8/31$870
Thu 10/1510:42 am -
2 stops17h 38m
Thu 10/2212:20 pm -
1 stop16h 39m
Deal found 8/31$880
Sun 10/116:05 pm -
1 stop10h 00m
Sun 11/110:40 am -
2 stops18h 07m
Deal found 9/1$896
Mon 11/1611:20 am -
1 stop15h 50m
Fri 11/2011:20 am -
2 stops33h 32m
Deal found 8/31$1,000
Tue 10/66:05 pm -
1 stop10h 00m
Sun 10/186:50 pm -
2 stops34h 09m
Deal found 9/1$1,008
Sun 11/151:55 pm -
1 stop15h 10m
Thu 11/1912:20 pm -
1 stop12h 16m
Deal found 9/2$1,020

Find flight deals from Knoxville to Lisbon

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$774
(Expedia)

Popular in

June

Cheapest in

January

Average price

$1,090
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.
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From Knoxville McGhee Tyson to Lisbon Humberto Delgado
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Highest demand for flights based on searches. 27% potential increase in price ($400 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($45 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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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.

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Price

Cheapest round-trip

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Mon 2/15

4:15 pm-12:05 pm

2 stops14h 50m

Lisbon Humberto Delgado

Sun 2/21

11:05 am-9:47 pm

1 stop15h 42m

$799

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Mon 10/19

7:25 pm-10:30 am

1 stop10h 05m

Lisbon Humberto Delgado

Mon 10/26

12:25 pm-11:59 pm

2 stops39h 34m

$850

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Thu 10/15

12:06 pm-11:15 am

2 stops18h 09m

Lisbon Humberto Delgado

Thu 10/22

5:00 am-11:02 pm

2 stops23h 02m

$870

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Thu 10/15

10:42 am-9:20 am

2 stops17h 38m

Lisbon Humberto Delgado

Thu 10/22

12:20 pm-11:59 pm

1 stop16h 39m

$880

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Thu 3/4

10:16 am-10:20 am

1 stop19h 04m

Lisbon Humberto Delgado

Sun 3/14

10:40 am-4:25 pm

2 stops57h 45m

$910

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Mon 11/16

11:20 am-8:10 am

1 stop15h 50m

Lisbon Humberto Delgado

Fri 11/20

11:20 am-3:52 pm

2 stops33h 32m

$1,000
Quickest round-trip

KnoxvilleLisbon

TYS Knoxville McGhee Tyson - LIS Lisbon Humberto Delgado

TYSLIS

Knoxville McGhee Tyson

Sun 11/15

1:55 pm-10:05 am

1 stop15h 10m

Lisbon Humberto Delgado

Thu 11/19

12:20 pm-7:36 pm

1 stop12h 16m

$1,020

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/1

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 September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice 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 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.
Estimated round-trip price

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 $527). Flying from Knoxville to Lisbon in June is currently the most expensive (average of $1,525). 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.

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
7.4
Good
10,171 reviews

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!
United Airlines
7.4
Good
10,171 reviews
United Airlines
7.4
Good
10,171 reviews

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!
British Airways
6.7
Okay
8,206 reviews
United Airlines
7.4
Good
10,171 reviews

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

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 10h 05m. Fly via American Airlines, United Airlines, or Delta 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 54% 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 $527). Flying from Knoxville to Lisbon in June is currently the most expensive (average of $1,525). 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
Torres Vedras
Beja
Nazaré
Colares
Sesimbra

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Knoxville to Lisbon

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Top 2 airlines flying from Knoxville to Lisbon

AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$475Average$1,054FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$629Average$1,090FlexibilityNo cancel feeOn-time69%

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