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Cheap flights from Knoxville to London Heathrow Airport from £240

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 15/3. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — LHR
20 Feb — 27 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Knoxville to Heathrow

Enter your travel dates to find the best prices.

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 21 January 2026.

Tue 31/311:42
TYS
-
LHR
1 stop14h 58m
Iberia
Tue 14/420:50
LHR
-
TYS
2 stops29h 45m
Iberia
Deal found 20/1£441
Tue 31/317:47
TYS
-
LHR
1 stop14h 03m
British Airways
Tue 14/407:50
LHR
-
TYS
2 stops19h 07m
British Airways
Deal found 19/1£442
Wed 18/212:21
TYS
-
LHR
1 stop13h 29m
Finnair
Wed 25/211:55
LHR
-
TYS
1 stop17h 04m
Finnair
Deal found 19/1£445
Tue 21/414:49
TYS
-
LHR
1 stop11h 01m
British Airways
Tue 5/509:15
LHR
-
TYS
2 stops17h 42m
British Airways
Deal found 20/1£446
Wed 28/116:00
TYS
-
LHR
1 stop10h 20m
British Airways
Wed 4/211:00
LHR
-
TYS
1 stop16h 09m
British Airways
Deal found 19/1£449
Sat 18/417:57
TYS
-
LHR
2 stops37h 03m
British Airways
Tue 5/507:50
LHR
-
TYS
2 stops19h 07m
British Airways
Deal found 19/1£451
Wed 15/411:31
TYS
-
LHR
2 stops18h 04m
Iberia
Mon 20/420:50
LHR
-
TYS
2 stops29h 45m
Iberia
Deal found 19/1£451
Tue 31/312:21
TYS
-
LHR
1 stop14h 44m
Finnair
Tue 14/412:55
LHR
-
TYS
1 stop16h 01m
Finnair
Deal found 19/1£453
Tue 21/413:20
TYS
-
LHR
1 stop17h 50m
Finnair
Tue 5/512:55
LHR
-
TYS
1 stop16h 01m
Finnair
Deal found 20/1£456
Tue 5/513:20
TYS
-
LHR
1 stop13h 45m
Finnair
Tue 19/510:05
LHR
-
TYS
1 stop18h 51m
Finnair
Deal found 19/1£457
Wed 22/414:49
TYS
-
LHR
1 stop11h 01m
British Airways
Wed 6/519:30
LHR
-
TYS
2 stops31h 05m
British Airways
Deal found 18/1£457

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 21 January 2026.

Round-trip from

£441

One-way from

£240

Popular in

December

Cheapest in

October

Average price

£593
Iberia
  • Iberia
  • 31/3-14/4
  • 3 total stops
  • 44h 43m total
  • Knoxville to London
Search Deals
15/3
  • 15/3
  • 3 total stops
  • 47h 05m total
  • Knoxville to London
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£16 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 21 January 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

Wed 15/4

11:31-07:40

1 stop15h 09m

London Heathrow

Mon 20/4

20:50-21:35

2 stops29h 45m

£442

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 6/5

07:00-06:50

1 stop18h 50m

London Heathrow

Wed 20/5

12:30-21:57

1 stop14h 27m

£460

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Fri 27/2

13:50-05:55

1 stop11h 05m

London Heathrow

Sat 7/3

06:50-19:29

2 stops17h 39m

£462

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 1/4

16:29-10:55

1 stop13h 26m

London Heathrow

Wed 15/4

08:55-23:56

1 stop20h 01m

£464

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Sat 18/4

17:57-06:55

1 stop31h 58m

London Heathrow

Tue 5/5

09:45-16:35

1 stop11h 50m

£464

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Tue 31/3

18:38-10:20

1 stop10h 42m

London Heathrow

Wed 15/4

19:10-21:35

2 stops31h 25m

£466

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 18/2

14:21-10:50

1 stop15h 29m

London Heathrow

Wed 25/2

06:50-19:29

2 stops17h 39m

£468

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Fri 6/3

06:01-06:55

1 stop19h 54m

London Heathrow

Tue 10/3

06:30-18:27

2 stops15h 57m

£469

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Mon 9/3

05:40-09:00

1 stop23h 20m

London Heathrow

Mon 16/3

06:30-20:35

2 stops18h 05m

£469

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Fri 6/3

06:01-06:55

1 stop19h 54m

London Heathrow

Wed 11/3

06:30-18:27

2 stops15h 57m

£469

Flights are sorted by cheapest return flights first.

Deals found on 18/1

Showing 1-10 of 19 results
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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 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 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 return flight from Knoxville to Heathrow. Price data was last updated on 16 January 2026.

The price you pay for your flight from Knoxville to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 85 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 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 £402). Flying from Knoxville to London Heathrow Airport in June is currently the most expensive (average of £675). 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.

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?

    If you book a flight to London Heathrow from Knoxville, you will be flying from 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 McGhee Tyson to London Heathrow per day from 0 different airlines.

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

    For as low as £462, Iberia can have you in London Heathrow Airport from Knoxville in 11h 05m. There are 4076 mi between Knoxville and London Heathrow Airport. Both multi-stop and direct flights can be found to your destination and back.

  • 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 holiday 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 £402). Flying from Knoxville to London Heathrow Airport in June is currently the most expensive (average of £675). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Luton
Croydon
Northampton
Wembley
Gatwick
Slough
Hounslow
Ilford
Brentford
Hayes
Colchester
Watford
Swindon
Crawley
Bedford
Kingston upon Thames
Chelmsford
Eastbourne
Romford

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Deals for Knoxville to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Knoxville to Heathrow for you. Better yet — we are completely free to use.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Knoxville to Heathrow, users can toggle the no change fees filter when performing a flight search.

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

Of course! You can now track prices for flights from Knoxville to Heathrow and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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