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Cheap flights from Knoxville to London Heathrow Airport from £266

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 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — LHR
22 Mar — 29 Mar1
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 20 February 2026.

Tue 21/411:31
TYS
-
LHR
1 stop17h 59m
Iberia
Wed 29/407:50
LHR
-
TYS
2 stops18h 31m
Iberia
Deal found 18/2£478
Wed 15/411:31
TYS
-
LHR
1 stop15h 09m
British Airways
Mon 20/419:25
LHR
-
TYS
2 stops29h 53m
British Airways
Deal found 18/2£480
Sat 18/417:15
TYS
-
LHR
1 stop33h 25m
United Airlines
Tue 5/506:50
LHR
-
TYS
2 stops17h 45m
United Airlines
Deal found 18/2£481
Wed 22/410:49
TYS
-
LHR
2 stops15h 06m
United Airlines
Wed 6/506:50
LHR
-
TYS
2 stops17h 45m
United Airlines
Deal found 17/2£485
Wed 15/419:20
TYS
-
LHR
2 stops16h 45m
Lufthansa
Mon 20/419:30
LHR
-
TYS
2 stops31h 59m
Lufthansa
Deal found 18/2£486
Wed 6/519:18
TYS
-
LHR
1 stop10h 22m
United Airlines
Wed 20/507:30
LHR
-
TYS
2 stops17h 05m
United Airlines
Deal found 18/2£490
Mon 20/419:20
TYS
-
LHR
2 stops14h 20m
United Airlines
Tue 28/406:50
LHR
-
TYS
2 stops15h 11m
United Airlines
Deal found 17/2£496

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 20 February 2026.

Round-trip from

£478

One-way from

£266

Popular in

December

Cheapest in

January

Average price

£740
Iberia
  • Iberia
  • 21/4-29/4
  • 3 total stops
  • 36h 30m total
  • Knoxville to London
Search Deals
22/4
  • 22/4
  • 3 total stops
  • 39h 35m total
  • Knoxville to London
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 20 February 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 18/4

19:20-06:55

1 stop30h 35m

London Heathrow

Tue 5/5

06:50-17:11

2 stops15h 21m

£481

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 6/5

07:00-05:55

2 stops17h 55m

London Heathrow

Wed 20/5

06:50-20:12

2 stops18h 22m

£481

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 22/4

19:20-10:40

1 stop10h 20m

London Heathrow

Wed 6/5

06:50-20:12

2 stops18h 22m

£481

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Mon 27/4

19:00-11:20

1 stop11h 20m

London Heathrow

Wed 13/5

11:30-21:25

2 stops14h 55m

£486

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 15/4

13:52-11:45

1 stop16h 53m

London Heathrow

Mon 20/4

17:50-19:42

2 stops30h 52m

£490

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Sat 11/4

19:20-06:55

1 stop30h 35m

London Heathrow

Sat 18/4

13:40-19:42

2 stops35h 02m

£527

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 22/4

16:25-13:00

3 stops39h 35m

£266

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 22/4

09:40-10:00

2 stops19h 20m

£295

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 22/4

11:25-07:40

1 stop15h 15m

£296

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 13/5

07:00-05:55

2 stops17h 55m

£296

Flights are sorted by cheapest return flights first.

Deals found on 19/2

Showing 1-10 of 12 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 18 February 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 £398). Flying from Knoxville to London Heathrow Airport in June is currently the most expensive (average of £665). 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.

How much does it cost for a return flight from Knoxville to London Heathrow Airport?

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 £481, United Airlines can have you in London Heathrow Airport from Knoxville in 30h 35m. 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 £398). Flying from Knoxville to London Heathrow Airport in June is currently the most expensive (average of £665). 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
Wembley
Northampton
Gatwick
Slough
Hounslow
Ilford
Hayes
Brentford
Colchester
Watford
Guildford
Kingston upon Thames
Eastbourne
Ipswich
Chelmsford
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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