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Cheap flights from Knoxville to London Heathrow Airport from £287

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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — LHR
12 Apr — 19 Apr1
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 13 March 2026.

Wed 8/411:31
TYS
-
LHR
1 stop17h 59m
British Airways
Wed 15/409:15
LHR
-
TYS
2 stops17h 42m
British Airways
Deal found 9/3£550
Fri 4/916:00
TYS
-
LHR
2 stops36h 20m
Scandinavian Airlines
Sat 12/914:20
LHR
-
TYS
2 stops36h 26m
Scandinavian Airlines
Deal found 9/3£555
Wed 22/414:06
TYS
-
LHR
1 stop11h 49m
British Airways
Wed 29/406:45
LHR
-
TYS
2 stops20h 12m
British Airways
Deal found 9/3£558
Wed 8/417:06
TYS
-
LHR
1 stop14h 09m
Iberia
Wed 15/412:15
LHR
-
TYS
1 stop14h 06m
Iberia
Deal found 9/3£560
Mon 14/916:00
TYS
-
LHR
2 stops24h 40m
Scandinavian Airlines
Mon 21/906:40
LHR
-
TYS
2 stops20h 06m
Scandinavian Airlines
Deal found 13/3£561
Thu 9/413:20
TYS
-
LHR
1 stop13h 45m
Finnair
Thu 16/410:05
LHR
-
TYS
1 stop18h 51m
Finnair
Deal found 10/3£566
Tue 1/917:57
TYS
-
LHR
2 stops19h 43m
Lufthansa
Tue 15/910:50
LHR
-
TYS
2 stops18h 07m
Lufthansa
Deal found 8/3£568
Wed 2/917:57
TYS
-
LHR
2 stops17h 43m
Lufthansa
Wed 9/909:30
LHR
-
TYS
2 stops19h 27m
Lufthansa
Deal found 9/3£575
Thu 3/916:00
TYS
-
LHR
2 stops36h 20m
Scandinavian Airlines
Sat 12/914:20
LHR
-
TYS
2 stops36h 26m
Scandinavian Airlines
Deal found 9/3£578
Wed 15/419:20
TYS
-
LHR
2 stops16h 45m
Lufthansa
Mon 20/419:30
LHR
-
TYS
2 stops32h 04m
Lufthansa
Deal found 9/3£582
Wed 22/411:31
TYS
-
LHR
1 stop15h 09m
Iberia
Wed 6/506:15
LHR
-
TYS
2 stops20h 06m
Iberia
Deal found 9/3£583

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 13 March 2026.

Round-trip from

£550

One-way from

£287

Popular in

December

Cheapest in

January

Average price

£663
British Airways
  • British Airways
  • 8/4-15/4
  • 3 total stops
  • 35h 41m total
  • Knoxville to London
Search Deals
9/4
  • 9/4
  • 2 total stops
  • 28h 40m total
  • Knoxville to London
Search Deals
High demand for flights, 0% potential price rise
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 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 13 March 2026.
Use the filters below to find and compare flights from Knoxville to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Tue 31/3

09:40-10:00

2 stops19h 20m

London Heathrow

Tue 7/4

07:25-19:42

2 stops17h 17m

£589

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Tue 31/3

07:00-06:30

2 stops18h 30m

London Heathrow

Wed 8/4

10:50-23:08

2 stops17h 18m

£589

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Tue 1/9

14:16-09:00

1 stop13h 44m

London Heathrow

Tue 15/9

11:10-21:15

1 stop15h 05m

£611

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 22/4

14:49-06:50

1 stop11h 01m

London Heathrow

Wed 29/4

08:55-23:56

1 stop20h 01m

£612

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 2/9

07:15-11:35

1 stop23h 20m

London Heathrow

Wed 9/9

06:50-16:59

2 stops15h 09m

£624

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Tue 5/5

07:00-05:55

2 stops17h 55m

London Heathrow

Tue 12/5

06:50-17:08

2 stops15h 18m

£624

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Tue 1/9

07:15-07:40

1 stop19h 25m

London Heathrow

Tue 15/9

06:50-16:59

2 stops15h 09m

£624

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Thu 9/4

07:00-10:00

2 stops22h 00m

London Heathrow

Thu 16/4

06:55-19:42

2 stops17h 47m

£627

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Sat 18/4

19:20-06:30

2 stops30h 10m

London Heathrow

Tue 5/5

07:25-20:12

2 stops17h 47m

£627
Fastest return journey

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Tue 1/9

17:37-11:15

1 stop12h 38m

London Heathrow

Tue 15/9

12:30-19:04

1 stop11h 34m

£630

Flights are sorted by cheapest return flights first.

Deals found on 9/3

Showing 1-10 of 17 resultsSorted by cheapest first
1
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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 6 March 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, July is the cheapest month in which you can book a flight from Knoxville to London Heathrow Airport (average of £404). Flying from Knoxville to London Heathrow Airport in June is currently the most expensive (average of £666). 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 £589, United Airlines can have you in London Heathrow Airport from Knoxville in 19h 20m. There are 4076 mi between Knoxville and London Heathrow Airport.

  • 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, July is the cheapest month in which you can book a flight from Knoxville to London Heathrow Airport (average of £404). Flying from Knoxville to London Heathrow Airport in June is currently the most expensive (average of £666). 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
Wembley
Croydon
Northampton
Luton
Hounslow
Slough
Gatwick
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Chelmsford
Eastbourne
Ipswich
Swindon
Bedford

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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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