HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$632+ Cheap flights from Knoxville (TYS) to Portugal

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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — LIS
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Knoxville to Portugal with Cheapflights

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 Portugal

Keep the following information in mind while searching for Knoxville to Portugal flight deals. Data was last updated July 30, 2025.

Round-trip from

$632
(Ovago)

Popular in

June

Cheapest in

January

Average price

$1,197
From Knoxville McGhee Tyson to Portugal
Search Deals
Highest demand for flights based on searches. 31% potential increase in price ($452 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($68 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Knoxville to Portugal

Cheapest flights from Knoxville to Portugal
Explore the most affordable flight options available from Knoxville to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This Ovago deal was found by Cheapflights users on 7/29. 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.
Mon 10/136:15 pmTYS - LIS
2 stops23h 55mBritish Airways
Mon 11/246:35 pmLIS - TYS
2 stops31h 29mBritish Airways
Deal found 7/29$632
This United Airlines deal was found by Cheapflights users on 7/29. 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 12/47:25 pmTYS - LIS
1 stop9h 50mUnited Airlines
Wed 12/1011:00 amLIS - TYS
2 stops41h 44mUnited Airlines
Deal found 7/29$639
This Finnair deal was found by Cheapflights users on 7/29. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/410:57 amTYS - LIS
1 stop17h 08mMultiple Airlines
Wed 12/1011:15 amLIS - TYS
1 stop14h 25mMultiple Airlines
Deal found 7/29$655
This United Airlines deal was found by Cheapflights users on 7/28. 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 11/192:25 pmTYS - FAO
2 stops16h 55mUnited Airlines
Sun 11/231:15 pmFAO - TYS
2 stops39h 44mUnited Airlines
Deal found 7/28$813
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Thu 9/257:18 amTYS - LIS
1 stop20h 47mAmerican Airlines
Thu 10/211:05 amLIS - TYS
1 stop11h 38mAmerican Airlines
Deal found 7/30$1,000
This KLM deal was found by Cheapflights users on 7/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:15 pmTYS - FNC
2 stops41h 35mKLM
Mon 12/810:25 amFNC - TYS
2 stops40h 07mKLM
Deal found 7/28$1,089
This Gurufare deal was found by Cheapflights users on 7/29. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/267:25 pmTYS - LIS
1 stop10h 05mLufthansa
Tue 9/212:20 pmLIS - TYS
1 stop16h 37mLufthansa
Deal found 7/29$1,178
This Air Canada deal was found by Cheapflights users on 7/29. 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.
Tue 8/269:55 amTYS - LIS
3 stops18h 25mAir Canada
Tue 9/211:25 amLIS - TYS
3 stops17h 32mAir Canada
Deal found 7/29$1,274
This Lufthansa deal was found by Cheapflights users on 7/28. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:25 pmTYS - FNC
2 stops20h 00mLufthansa
Sun 12/74:10 amFNC - TYS
2 stops20h 19mLufthansa
Deal found 7/28$1,384

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville to Portugal 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 July 30, 2025.
Use the filters below to find and compare flights from Knoxville to Portugal that are best for you.

Fly from

Knoxville

Fly to

Portugal

Route

Depart

Return

Price

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Mon 10/13

6:15 pm-11:10 pm

2 stops23h 55m

Lisbon Humberto Delgado

Mon 11/24

6:35 pm-9:04 pm

2 stops31h 29m

$632

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 12/4

7:25 pm-10:15 am

1 stop9h 50m

Lisbon Humberto Delgado

Wed 12/10

11:00 am-11:44 pm

2 stops41h 44m

$639

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 12/4

10:57 am-9:05 am

1 stop17h 08m

Lisbon Humberto Delgado

Wed 12/10

11:15 am-8:40 pm

1 stop14h 25m

$655

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

9:08 am-6:55 am

2 stops16h 47m

Lisbon Humberto Delgado

Sat 1/17

10:30 am-11:45 pm

2 stops18h 15m

$660

KnoxvilleFaro

TYS - FAO

TYSFAO

Knoxville McGhee Tyson

Wed 11/19

2:25 pm-12:20 pm

2 stops16h 55m

Faro

Sun 11/23

1:15 pm-11:59 pm

2 stops39h 44m

$813

KnoxvilleFunchal

TYS - FNC

TYSFNC

Knoxville McGhee Tyson

Thu 12/4

7:15 pm-5:50 pm

2 stops41h 35m

Funchal Madeira

Mon 12/8

10:25 am-9:32 pm

2 stops40h 07m

$1,089

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Tue 8/26

7:25 pm-10:30 am

1 stop10h 05m

Lisbon Humberto Delgado

Tue 9/2

12:20 pm-11:57 pm

1 stop16h 37m

$1,178

KnoxvilleFunchal

TYS - FNC

TYSFNC

Knoxville McGhee Tyson

Thu 12/4

7:25 pm-8:25 pm

2 stops20h 00m

Funchal Madeira

Sun 12/7

4:10 am-7:29 pm

2 stops20h 19m

$1,384

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Best time to book a flight from Knoxville to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal 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 Portugal

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

Currently, January is the cheapest month in which you can book a flight from Knoxville to Portugal (average of $612). Flying from Knoxville to Portugal in June is currently the most expensive (average of $1,129). 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 PT?

Find hourly flight availability from Knoxville to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 30, 2025.

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

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated July 30, 2025.
Peruse reviews from past customers who have flown with KLM, United Airlines, and American Airlines from Knoxville to Portugal 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.
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Overall

7.8

Food

7.3

Entertainment

7.1

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,383 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Overall

7.8

Food

7.3

Entertainment

7.1

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
United Airlines
7.4
Good
8,896 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Overall

7.8

Food

7.3

Entertainment

7.1

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
American Airlines
7.2
Good
10,000 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Overall

7.8

Food

7.3

Entertainment

7.1

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Air Canada
7.1
Good
9,837 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Overall

7.8

Food

7.3

Entertainment

7.1

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Lufthansa
6.8
Okay
7,269 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Overall

7.8

Food

7.3

Entertainment

7.1

Boarding

7.8

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

Find useful and relevant information for your journey from Knoxville to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Knoxville to Portugal?

    For a flight from Knoxville to Portugal, you will be flying from McGhee Tyson. Knoxville McGhee Tyson (TYS) is just 11.3 mi from the center of the city.

  • What are the most popular routes from Knoxville to Portugal?

    The most popular flight routes from Knoxville to Portugal are Knoxville McGhee Tyson - Lisbon Humberto Delgado, Knoxville McGhee Tyson - Funchal Madeira and Knoxville McGhee Tyson - Faro.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Knoxville to Portugal 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 Portugal?

    Currently, January is the cheapest month in which you can book a flight from Knoxville to Portugal (average of $612). Flying from Knoxville to Portugal in June is currently the most expensive (average of $1,129). 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

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 Portugal

See prices for flight routes from nearby airports that may be better suited for you.
Nashville to Heathrow flights
Nashville to Gatwick flights
Nashville to Dublin flights
Nashville to Leonardo da Vinci/Fiumicino flights
Nashville to Lisbon flights
Nashville to Charles de Gaulle flights
Nashville to Keflavik Intl flights
Nashville to London City flights
Nashville to Athens flights
Nashville to Porto flights
Nashville to Orly flights
Nashville to Malpensa flights
Nashville to Barcelona-El Prat flights
Nashville to Stansted flights
Memphis to Leonardo da Vinci/Fiumicino flights
Nashville to Madrid flights
Nashville to Linate flights
Memphis to Heathrow flights
Nashville to Amsterdam flights
Knoxville to Heathrow flights
Nashville to Frankfurt flights
Knoxville to Charles de Gaulle flights
Knoxville to Frankfurt flights
Memphis to Keflavik Intl flights
Nashville to Edinburgh flights
Nashville to Florence flights
Knoxville to Edinburgh flights
Nashville to Munich flights
Nashville to Istanbul flights
Nashville to Vicenza flights
Knoxville to Leonardo da Vinci/Fiumicino flights
Nashville to Copenhagen flights
Nashville to Zurich flights
Knoxville to Dublin flights
Memphis to Gatwick flights
Knoxville to Madrid flights
Memphis to Charles de Gaulle flights
Nashville to Vienna flights
Nashville to Naples flights
Chattanooga to Leonardo da Vinci/Fiumicino flights
Chattanooga to Heathrow flights
Knoxville to London City flights
Memphis to Munich flights
Nashville to Sabiha Gokcen flights
Blountville to Amsterdam flights
Chattanooga to Dublin flights
Memphis to Frankfurt flights
Memphis to London City flights
Nashville to Glasgow Intl flights
Nashville to Ibiza flights

Top 3 airlines flying from Knoxville to Portugal

Discover the top 3 airlines that operate flights from Knoxville to Portugal. 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$580Average$1,015FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$589Average$877FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$603Average$998FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.