Portugal

$646+ 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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — LIS
Aug 18 — Aug 251
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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 August 13, 2025.

Round-trip from

$646
(Ovago)

Popular in

June

Cheapest in

January

Average price

$943
From Knoxville McGhee Tyson to Portugal
Highest demand for flights based on searches. 33% potential increase in price ($476 potential increase over avg. RT price).
Cheapest flight prices on average. 7% potential price decrease ($70 potential savings vs. average RT price).
Average for round-trip flights in August 2025

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 August 13, 2025.

This Ovago deal was found by Cheapflights users on 8/12. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/242:12 pmTYS - LIS
1 stop13h 53mBritish Airways
Tue 11/46:30 amLIS - TYS
2 stops19h 54mBritish Airways
Deal found 8/12$646
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Fri 10/247:00 amTYS - LIS
2 stops20h 20mUnited Airlines
Tue 11/45:00 amLIS - TYS
2 stops23h 59mUnited Airlines
Deal found 8/12$648
This United Airlines deal was found by Cheapflights users on 8/10. 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.
Thu 12/42:30 pmTYS - LIS
1 stop14h 45mUnited Airlines
Wed 12/1011:55 amLIS - TYS
1 stop12h 34mUnited Airlines
Deal found 8/10$655
This Finnair deal was found by Cheapflights users on 8/12. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1210:57 amTYS - LIS
1 stop15h 58mMultiple Airlines
Sat 12/2010:30 amLIS - TYS
1 stop15h 14mMultiple Airlines
Deal found 8/12$705
This American Airlines deal was found by Cheapflights users on 8/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/127:48 amTYS - LIS
1 stop19h 07mAmerican Airlines
Sat 12/2010:30 amLIS - TYS
2 stops16h 00mAmerican Airlines
Deal found 8/12$709
This Ovago deal was found by Cheapflights users on 8/12. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:53 pmTYS - LIS
2 stops34h 02mBritish Airways
Sat 12/206:45 pmLIS - TYS
2 stops30h 59mBritish Airways
Deal found 8/12$761
This Ovago deal was found by Cheapflights users on 8/12. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:52 pmTYS - LIS
2 stops36h 18mBritish Airways
Thu 1/17:00 amLIS - TYS
2 stops19h 30mBritish Airways
Deal found 8/12$773
This United Airlines deal was found by Cheapflights users on 8/11. 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.
Wed 11/198:26 amTYS - FAO
2 stops22h 54mUnited Airlines
Sun 11/231:15 pmFAO - TYS
2 stops36h 05mUnited Airlines
Deal found 8/11$831
This CheapOair deal was found by Cheapflights users on 8/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/262:34 pmTYS - LIS
2 stops27h 36mBritish Airways
Fri 10/36:35 amLIS - TYS
2 stops21h 28mBritish Airways
Deal found 8/12$848
This Ovago deal was found by Cheapflights users on 8/12. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/242:12 pmTYS - LIS
1 stop13h 53mMultiple Airlines
Tue 11/411:10 amLIS - TYS
1 stop14h 54mMultiple Airlines
Deal found 8/12$854
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Wed 9/107:00 amTYS - LIS
3 stops21h 20mUnited Airlines
Wed 9/175:05 amLIS - TYS
2 stops22h 40mUnited Airlines
Deal found 8/12$879
This Ovago deal was found by Cheapflights users on 8/12. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/105:43 pmTYS - LIS
2 stops24h 27mBritish Airways
Wed 9/1711:05 amLIS - TYS
1 stop15h 09mBritish Airways
Deal found 8/12$883

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 August 13, 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

Fri 10/24

2:12 pm-9:05 am

1 stop13h 53m

Lisbon Humberto Delgado

Tue 11/4

6:30 am-9:24 pm

2 stops19h 54m

$646

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Thu 12/4

9:40 am-10:15 am

1 stop19h 35m

Lisbon Humberto Delgado

Wed 12/10

5:00 am-11:44 pm

2 stops23h 44m

$648

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Fri 10/24

7:00 am-8:20 am

2 stops20h 20m

Lisbon Humberto Delgado

Tue 11/4

5:00 am-11:59 pm

2 stops23h 59m

$648

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

11:03 am-6:55 am

1 stop14h 52m

Lisbon Humberto Delgado

Sat 1/17

10:30 am-8:43 pm

1 stop15h 13m

$650

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 1/7

11:03 am-6:55 am

1 stop14h 52m

Lisbon Humberto Delgado

Sat 1/17

10:30 am-5:46 pm

1 stop12h 16m

$655

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

KnoxvilleFaro

TYS - FAO

TYSFAO

Knoxville McGhee Tyson

Wed 11/19

5:45 am-12:20 pm

2 stops25h 35m

Faro

Sun 11/23

1:15 pm-8:33 pm

2 stops36h 18m

$831

KnoxvilleFunchal

TYS - FNC

TYSFNC

Knoxville McGhee Tyson

Sun 2/1

10:16 am-1:30 pm

3 stops22h 14m

Funchal Madeira

Sun 2/8

3:20 pm-10:33 pm

2 stops36h 13m

$1,173

KnoxvilleFunchal

TYS - FNC

TYSFNC

Knoxville McGhee Tyson

Sun 2/1

2:00 pm-1:15 pm

3 stops18h 15m

Funchal Madeira

Sun 2/8

7:55 am-9:45 am

3 stops30h 50m

$1,196

KnoxvilleFunchal

TYS - FNC

TYSFNC

Knoxville McGhee Tyson

Wed 12/3

7:25 pm-2:30 pm

2 stops38h 05m

Funchal Madeira

Sun 12/7

9:15 pm-7:29 pm

2 stops27h 14m

$1,396

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

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 $1,128). 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 August 13, 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 August 13, 2025.
Peruse reviews from past customers who have flown with United Airlines, American Airlines, and British Airways 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.

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Comfort

7.3

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??

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Comfort

7.3

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??

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Comfort

7.3

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??

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Comfort

7.3

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 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?

  • 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 $1,128). 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

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Alternative routes for Knoxville to Portugal

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

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 August 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$580Average$1,012FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$589Average$893FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$603Average$978FlexibilityNo cancel feeOn-time69%

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