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Cheap flights from London Heathrow Airport to Knoxville from £399

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 15/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — TYS
23 abr. — 30 abr.1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Knoxville

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Knoxville
Explore the most affordable flight options available from Heathrow to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 marzo 2026.

lun. 4/507:25
LHR
-
TYS
2 stops17h 47m
Lufthansa
lun. 11/518:01
TYS
-
LHR
1 stop12h 54m
Lufthansa
Deal found 20/3£634
mar. 1/913:10
LHR
-
TYS
1 stop13h 13m
British Airways
mar. 8/915:01
TYS
-
LHR
1 stop12h 04m
British Airways
Deal found 23/3£657
lun. 4/508:40
LHR
-
TYS
2 stops17h 05m
United Airlines
lun. 11/509:50
TYS
-
LHR
2 stops21h 05m
United Airlines
Deal found 20/3£661
mar. 5/508:45
LHR
-
TYS
2 stops17h 00m
United Airlines
mar. 12/514:25
TYS
-
LHR
1 stop15h 15m
United Airlines
Deal found 21/3£663
mar. 1/907:25
LHR
-
TYS
2 stops18h 23m
United Airlines
mar. 8/908:30
TYS
-
LHR
2 stops17h 25m
United Airlines
Deal found 23/3£665
lun. 4/516:55
LHR
-
TYS
1 stop12h 00m
British Airways
lun. 11/514:49
TYS
-
LHR
1 stop11h 01m
British Airways
Deal found 20/3£668
sáb. 25/409:15
LHR
-
TYS
1 stop12h 52m
British Airways
jue. 30/417:06
TYS
-
LHR
1 stop12h 24m
British Airways
Deal found 23/3£675
sáb. 25/407:25
LHR
-
TYS
2 stops17h 17m
Lufthansa
jue. 30/414:25
TYS
-
LHR
1 stop15h 15m
Lufthansa
Deal found 23/3£680
mié. 15/418:05
LHR
-
TYS
2 stops32h 52m
Multiple Airlines
mié. 22/417:06
TYS
-
LHR
1 stop10h 59m
Multiple Airlines
Deal found 20/3£686

Find flight deals from Heathrow to Knoxville

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Knoxville (TYS). 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 24 marzo 2026.

Round-trip from

£634

One-way from

£399

Popular in

December

Cheapest in

September

Average price

£563
Lufthansa
  • Lufthansa
  • 4/5-11/5
  • 3 total stops
  • 30h 41m total
  • London to Knoxville
Search Deals
15/4
  • 15/4
  • 2 total stops
  • 27h 37m total
  • London to Knoxville
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£88 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Knoxville 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 858,174 searches. Data last updated 24 marzo 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Knoxville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

mar. 1/9

07:25-20:48

2 stops18h 23m

Knoxville McGhee Tyson

mar. 8/9

08:30-06:55

2 stops17h 25m

£665

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

mié. 6/5

07:25-20:45

2 stops18h 20m

Knoxville McGhee Tyson

mié. 13/5

10:49-05:55

2 stops14h 06m

£665

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

sáb. 25/4

10:50-22:34

2 stops16h 44m

Knoxville McGhee Tyson

jue. 30/4

10:49-06:55

2 stops15h 06m

£695

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

sáb. 18/4

16:55-23:55

1 stop12h 00m

Knoxville McGhee Tyson

jue. 23/4

11:31-09:05

1 stop16h 34m

£706

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

sáb. 18/4

09:15-17:07

1 stop12h 52m

Knoxville McGhee Tyson

dom. 19/4

17:57-06:55

1 stop31h 58m

£706

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

lun. 13/4

09:55-23:54

2 stops18h 59m

Knoxville McGhee Tyson

mar. 21/4

12:03-06:25

1 stop13h 22m

£707
Fastest return journey

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

lun. 13/4

13:25-21:40

1 stop13h 15m

Knoxville McGhee Tyson

jue. 23/4

15:01-06:25

1 stop10h 24m

£720

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

lun. 13/4

12:30-21:57

1 stop14h 27m

Knoxville McGhee Tyson

mar. 21/4

17:06-09:05

1 stop10h 59m

£721

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

sáb. 18/4

10:25-19:42

2 stops14h 17m

Knoxville McGhee Tyson

mar. 21/4

14:25-06:55

1 stop11h 30m

£721

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

mié. 2/9

07:25-23:57

2 stops21h 32m

Knoxville McGhee Tyson

dom. 6/9

17:57-07:40

2 stops32h 43m

£725

Flights are sorted by cheapest return flights first.

Deals found on 22/3

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to Knoxville

Have a flexible travel schedule? Discover the best time to fly to Knoxville from Heathrow with our price prediction graph.
Estimated return 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 London Heathrow Airport to Knoxville

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Knoxville. Price data was last updated on 13 March 2026.

The price you pay for your flight from London Heathrow Airport to Knoxville may vary depending on when you book. For the best chance of a lower fare, look to book 66 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Knoxville (average of £458). Flying from London Heathrow Airport to Knoxville in January is currently the most expensive (average of £596). 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 Knoxville

Get insights into the airlines that provide service to Knoxville. 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 Knoxville. Reviews last updated 24 marzo 2026.
Read reviews from past customers who have flown with Finnair,Virgin Atlantic, andUnited Airlines from London Heathrow Airport to Knoxville. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.7
Good
1,374 reviews
Check prices

Entertainment

6.9

Boarding

7.7

Crew

8.2

Comfort

7.5

Overall

7.7

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Finnair
7.7
Good
1,374 reviews
Finnair
7.7
Good
1,374 reviews
Check prices

Entertainment

6.9

Boarding

7.7

Crew

8.2

Comfort

7.5

Overall

7.7

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Virgin Atlantic
7.5
Good
685 reviews
Finnair
7.7
Good
1,374 reviews
Check prices

Entertainment

6.9

Boarding

7.7

Crew

8.2

Comfort

7.5

Overall

7.7

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
United Airlines
7.4
Good
9,471 reviews
Finnair
7.7
Good
1,374 reviews
Check prices

Entertainment

6.9

Boarding

7.7

Crew

8.2

Comfort

7.5

Overall

7.7

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Lufthansa
6.8
Okay
7,864 reviews
Finnair
7.7
Good
1,374 reviews
Check prices

Entertainment

6.9

Boarding

7.7

Crew

8.2

Comfort

7.5

Overall

7.7

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
British Airways
6.7
Okay
7,817 reviews
Finnair
7.7
Good
1,374 reviews
Check prices

Entertainment

6.9

Boarding

7.7

Crew

8.2

Comfort

7.5

Overall

7.7

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

Related info for your journey

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

    If you book a flight to Knoxville from London Heathrow, you will be flying to McGhee Tyson, which is the city’s only airport. Knoxville McGhee Tyson (TYS) is located 11.3 mi from the center of Knoxville. There are 0 flights from London Heathrow to McGhee Tyson per day from 5 different airlines.

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

    United Airlines and British Airways can get you from London Heathrow Airport to Knoxville in just under 12h. Your travel time can differ by up to 6h 23m. The distance from London Heathrow Airport to Knoxville is about 4076 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    Currently priced at £458, Lufthansa will fly you from London Heathrow Airport to Knoxville and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and British Airways - these airlines can fly you to your destination from £468 and £477, respectively. These flights start at 36% lower than the current average price 3 months from now.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Knoxville (average of £458). Flying from London Heathrow Airport to Knoxville in January is currently the most expensive (average of £596). 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

Travelling to a place near Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Cherokee

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Top 5 airlines flying from Heathrow to Knoxville

Discover the top 5 airlines that operate flights from Heathrow to Knoxville. 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 858,174 searches. Data last updated 24 marzo 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£458Average£653FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£468Average£620FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£477Average£659FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£512Average£684FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapest£517Average£614FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Knoxville?

Cheapflights helps you search for flights from Heathrow to Knoxville via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Knoxville?

Cheapflights helps you find that perfect flight to Knoxville from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Heathrow to Knoxville with no change fees?

Yes! Cheapflights helps users easily find flights from Heathrow to Knoxville with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Knoxville become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Knoxville flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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