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$500+ Cheap flights from Kingsport, TN 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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — LIS
Dec 19 — Dec 261
Fri 12/19
Fri 12/26
1 adult, Economy
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Cheap flight deals from Kingsport to Portugal

Keep the following information in mind while searching for Kingsport to Portugal flight deals. Data was last updated November 19, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$500
(Delta)
Provider with most accurate pricing for Blountville Tri Cities TN/VA-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Blountville Tri Cities TN/VA-Lisbon Humberto Delgado flights.
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From Kingsport to Portugal
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Find flight deals from Kingsport to Portugal

Cheapest flights from Kingsport to Portugal
Explore the most affordable flight options available from Kingsport to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 19, 2025.

This American Airlines deal was found by Cheapflights users on 11/18. 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 12/53:27 pmTRI - LIS
2 stops15h 38mAmerican Airlines
Thu 12/188:55 amLIS - TRI
2 stops19h 59mAmerican Airlines
Deal found 11/18$606
This KLM deal was found by Cheapflights users on 11/17. 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.
Fri 12/510:12 amTRI - OPO
2 stops19h 18mKLM
Tue 12/96:05 amOPO - TRI
2 stops21h 29mKLM
Deal found 11/17$748
This Delta deal was found by Cheapflights users on 11/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:05 amTRI - OPO
2 stops23h 25mDelta
Tue 12/96:05 amOPO - TRI
2 stops17h 39mDelta
Deal found 11/18$976

Cheapflights Fare Finder

 
Customize your flight search to find flights from Kingsport 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 November 19, 2025.
Use the filters below to find and compare flights from Kingsport to Portugal that are best for you.

Fly from

Kingsport

Fly to

Portugal

Route

Depart

Return

Price

BlountvilleLisbon

TRI - LIS

TRILIS

Blountville Tri Cities TN/VA

Fri 2/6

10:17 am-3:10 pm

2 stops23h 53m

Lisbon Humberto Delgado

Tue 2/10

11:25 am-9:36 am

2 stops27h 11m

$500

BlountvilleLisbon

TRI - LIS

TRILIS

Blountville Tri Cities TN/VA

Fri 12/5

3:27 pm-12:05 pm

2 stops15h 38m

Lisbon Humberto Delgado

Thu 12/18

8:55 am-11:54 pm

2 stops19h 59m

$606

BlountvillePorto

TRI - OPO

TRIOPO

Blountville Tri Cities TN/VA

Fri 12/5

10:12 am-10:30 am

2 stops19h 18m

Porto

Tue 12/9

6:05 am-10:34 pm

2 stops21h 29m

$748

BlountvillePorto

TRI - OPO

TRIOPO

Blountville Tri Cities TN/VA

Fri 12/5

6:05 am-10:30 am

2 stops23h 25m

Porto

Tue 12/9

6:05 am-6:44 pm

2 stops17h 39m

$976

BlountvilleLisbon

TRI - LIS

TRILIS

Blountville Tri Cities TN/VA

Fri 3/20

3:50 pm-8:55 am

2 stops37h 05m

Lisbon Humberto Delgado

Sat 3/28

6:55 pm-10:26 pm

2 stops31h 31m

$1,053

BlountvilleLisbon

TRI - LIS

TRILIS

Blountville Tri Cities TN/VA

Fri 1/2

7:56 am-8:50 am

2 stops19h 54m

Lisbon Humberto Delgado

Fri 1/9

11:05 am-11:18 pm

2 stops17h 13m

$1,150

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/17

Best time to book a flight from Kingsport to Portugal

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

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

Currently, December is the cheapest month in which you can book a flight from Kingsport to Portugal (average of $475). Flying from Kingsport to Portugal in June is currently the most expensive (average of $1,119). 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 K1N to PT?

Find hourly flight availability from Kingsport 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 November 19, 2025.

It’s optimal to fly from Kingsport to Portugal in the morning. By choosing this option you can save up to 26% on the cost of your flight, compared to a flight in the evening.

What is the cheapest day to fly from Kingsport to Portugal?

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

Travelers seeking maximum savings on their Kingsport to Portugal flight should consider departing on Tuesday at noon when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Kingsport to Portugal. 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 Kingsport to Portugal?

    Delta, American Airlines, and KLM can get you from Kingsport to Portugal in just under 15h 38m. Your travel time can differ by up to 8h 15m. There are 3897 mi between Kingsport and Portugal. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

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

    Currently, December is the cheapest month in which you can book a flight from Kingsport to Portugal (average of $475). Flying from Kingsport to Portugal in June is currently the most expensive (average of $1,119). 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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Top 4 airlines flying from Kingsport to Portugal

Discover the top 4 airlines that operate flights from Kingsport 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 November 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$543Average$1,114FlexibilityNo cancel feeOn-time69%
DeltaCheapest$563Average$1,215FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$565Average$1,032FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$615Average$967FlexibilityNo cancel feeOn-time70%

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