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$399+ Cheap flights from Knoxville (TYS) to Heathrow (LHR)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — LHR
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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Cheap flight deals from Knoxville to Heathrow

Cheapest flights from Knoxville to Heathrow
Explore the most affordable flight options available from Knoxville to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 3, 2026.

This Ticket deal was found by Cheapflights users on 2/1. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/12:38 pm
TYS
-
LHR
1 stop13h 22m
Virgin Atlantic
Mon 3/163:50 pm
LHR
-
TYS
1 stop12h 07m
Virgin Atlantic
Deal found 2/1$604
This United Airlines deal was found by Cheapflights users on 1/31. 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.
Sat 2/287:25 pm
TYS
-
LHR
1 stop10h 25m
United Airlines
Sat 3/76:50 am
LHR
-
TYS
2 stops17h 39m
United Airlines
Deal found 1/31$635
This oojo deal was found by Cheapflights users on 2/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/54:02 pm
TYS
-
LHR
1 stop13h 23m
British Airways
Sun 3/157:00 am
LHR
-
TYS
2 stops18h 05m
British Airways
Deal found 2/2$648
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Sat 3/77:25 pm
TYS
-
LHR
1 stop30h 15m
United Airlines
Sun 3/156:00 pm
LHR
-
TYS
2 stops30h 47m
United Airlines
Deal found 2/2$649
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Sat 4/187:20 pm
TYS
-
LHR
1 stop30h 35m
United Airlines
Tue 5/56:50 am
LHR
-
TYS
2 stops15h 21m
United Airlines
Deal found 2/2$651
This United Airlines deal was found by Cheapflights users on 2/2. 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 5/62:25 pm
TYS
-
LHR
1 stop11h 30m
United Airlines
Mon 5/1112:10 pm
LHR
-
TYS
2 stops51h 39m
United Airlines
Deal found 2/2$652
This United Airlines deal was found by Cheapflights users on 2/2. 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 4/2210:49 am
TYS
-
LHR
2 stops14h 06m
United Airlines
Wed 5/67:25 am
LHR
-
TYS
2 stops17h 47m
United Airlines
Deal found 2/2$656
This Cheapflightsfares deal was found by Cheapflights users on 2/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:20 pm
TYS
-
LHR
2 stops18h 05m
Lufthansa
Mon 4/207:30 pm
LHR
-
TYS
2 stops31h 59m
Lufthansa
Deal found 2/1$658
This oojo deal was found by Cheapflights users on 1/31. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/286:10 am
TYS
-
LHR
1 stop19h 25m
British Airways
Sat 3/79:55 am
LHR
-
TYS
1 stop17h 00m
British Airways
Deal found 1/31$661
This United Airlines deal was found by Cheapflights users on 2/1. 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 4/151:52 pm
TYS
-
LHR
1 stop16h 53m
United Airlines
Mon 4/204:25 pm
LHR
-
TYS
2 stops32h 17m
United Airlines
Deal found 2/1$662

Find flight deals from Knoxville to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$604
(Ticket)

One-way from

$399
(United Airlines)

Popular in

December

Cheapest in

October

Average price

$769
Provider with most accurate pricing for Knoxville McGhee Tyson-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-London Heathrow flights.
Search Deals
From Knoxville McGhee Tyson to London Heathrow
Search Deals
One-way flight from Knoxville McGhee Tyson to London Heathrow
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville to Heathrow 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 February 3, 2026.
Use the filters below to find and compare flights from Knoxville to London Heathrow Airport that are best for you.

Fly from

Knoxville

Fly to

Heathrow

Route

Depart

Return

Price

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Sat 2/28

1:50 pm-9:10 am

2 stops14h 20m

London Heathrow

Sat 3/7

6:50 am-7:29 pm

2 stops17h 39m

$639

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Sat 3/7

7:25 pm-6:40 am

1 stop30h 15m

London Heathrow

Sun 3/15

6:00 pm-8:47 pm

2 stops30h 47m

$649

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Sat 4/18

7:20 pm-6:55 am

1 stop30h 35m

London Heathrow

Tue 5/5

6:50 am-10:49 am

2 stops32h 59m

$651

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 4/22

10:49 am-5:55 am

2 stops14h 06m

London Heathrow

Wed 5/6

7:25 am-8:12 pm

2 stops17h 47m

$656

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 4/15

7:20 pm-5:05 pm

2 stops16h 45m

London Heathrow

Mon 4/20

7:30 pm-10:29 pm

2 stops31h 59m

$658

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Thu 3/5

4:02 pm-10:25 am

1 stop13h 23m

London Heathrow

Sun 3/15

11:00 am-9:24 pm

1 stop14h 24m

$661

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 3/18

3:13 pm-9:00 am

1 stop13h 47m

London Heathrow

Wed 3/25

3:50 pm-11:57 pm

1 stop12h 07m

$664

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Mon 4/6

7:00 am-11:45 am

1 stop23h 45m

London Heathrow

Mon 4/20

5:50 pm-7:42 pm

2 stops30h 52m

$664

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Thu 3/19

11:40 am-7:30 am

1 stop15h 50m

London Heathrow

Thu 3/26

10:25 am-8:47 pm

1 stop14h 22m

$664

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 3/18

10:55 am-5:55 am

1 stop15h 00m

London Heathrow

Wed 3/25

10:25 am-8:47 pm

1 stop14h 22m

$664

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

Showing 1-10 of 15 results
1
2

Compare providers for flights from Knoxville to Heathrow

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 Heathrow in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Knoxville-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub 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-London Heathrow Airport 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 Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 London Heathrow Airport

How far ahead should I book a flight from Knoxville to London Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from Knoxville to Heathrow. Price data was last updated on January 30, 2026.

To ensure you get the cheapest price possible for a flight from Knoxville to London Heathrow Airport, you should look to book at least 85 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Knoxville to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Knoxville to London Heathrow Airport (average of $541). Flying from Knoxville to London Heathrow Airport in June is currently the most expensive (average of $908). 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 Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated February 3, 2026.
See what other customers who have flown with Delta, Virgin Atlantic, and United Airlines from Knoxville to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,139 reviews

Food

7.2

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,139 reviews
Delta
7.9
Good
8,139 reviews

Food

7.2

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Virgin Atlantic
7.5
Good
678 reviews
Delta
7.9
Good
8,139 reviews

Food

7.2

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,236 reviews
Delta
7.9
Good
8,139 reviews

Food

7.2

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,218 reviews
Delta
7.9
Good
8,139 reviews

Food

7.2

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
British Airways
6.7
Okay
7,712 reviews
Delta
7.9
Good
8,139 reviews

Food

7.2

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Knoxville to Heathrow. 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 London Heathrow?

    Knoxville McGhee Tyson (TYS) is the airport you will fly out of if you book a flight from Knoxville to London Heathrow. You should not have trouble finding flights to London Heathrow from McGhee Tyson; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 5 airlines have flights from the Knoxville airport to London Heathrow. It is only a 11.3 mi journey to McGhee Tyson (TYS) from Knoxville’s city center.

  • How long is the flight from Knoxville to London Heathrow Airport?

    A quick flight from Knoxville to London Heathrow Airport can take about 14h 20m. United Airlines provides one of the quickest options available for as low as $639. There are 4076 mi between Knoxville and London Heathrow Airport.

  • What are the cheapest airlines flying from Knoxville to London Heathrow Airport round-trip?

    Cheapflights users have booked flights from Knoxville to London Heathrow Airport round-trip from $572. Other airlines that can offer you cheap pricing are Delta, from $624, and British Airways, from $693. Users have found that Virgin Atlantic is 39% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Knoxville to Heathrow 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 London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Knoxville to London Heathrow Airport (average of $541). Flying from Knoxville to London Heathrow Airport in June is currently the most expensive (average of $908). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Hounslow
Croydon
Southend-on-Sea
Harrow
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Northampton
Watford
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Knoxville to Heathrow

Discover the top 5 airlines that operate flights from Knoxville to Heathrow. 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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest$572Average$1,110FlexibilityNo cancel feeOn-time72%
DeltaCheapest$624Average$915FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$693Average$831FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$703Average$995FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$716Average$1,111FlexibilityNo cancel feeOn-time69%

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