Find flights
When to book
FAQs

Cheap flights from Knoxville to London Heathrow Airport from £319

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — LHR
3 May — 10 May1
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 3 April 2026.

Wed 11/1116:00
TYS
-
LHR
2 stops21h 30m
Scandinavian Airlines
Mon 16/1106:40
LHR
-
TYS
2 stops22h 06m
Scandinavian Airlines
Deal found 3/4£649
Mon 14/915:05
TYS
-
LHR
1 stop11h 35m
Iberia
Wed 23/906:15
LHR
-
TYS
2 stops20h 00m
Iberia
Deal found 1/4£678
Mon 3/819:19
TYS
-
LHR
2 stops16h 46m
Lufthansa
Fri 21/810:50
LHR
-
TYS
2 stops18h 07m
Lufthansa
Deal found 30/3£691
Wed 19/817:37
TYS
-
LHR
1 stop12h 38m
British Airways
Wed 2/909:15
LHR
-
TYS
2 stops17h 29m
British Airways
Deal found 31/3£695
Wed 19/819:19
TYS
-
LHR
2 stops15h 21m
Lufthansa
Wed 2/909:30
LHR
-
TYS
2 stops19h 27m
Lufthansa
Deal found 1/4£696
Wed 12/817:57
TYS
-
LHR
2 stops19h 43m
Lufthansa
Fri 21/810:50
LHR
-
TYS
2 stops18h 07m
Lufthansa
Deal found 29/3£698
Wed 2/918:07
TYS
-
LHR
1 stop13h 43m
British Airways
Wed 9/919:30
LHR
-
TYS
2 stops30h 45m
British Airways
Deal found 31/3£699

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 3 April 2026.

Round-trip from

£678

One-way from

£319

Popular in

December

Cheapest in

January

Average price

£588
Iberia
  • Iberia
  • 14/9-23/9
  • 3 total stops
  • 31h 35m total
  • Knoxville to London
Search Deals
Aer Lingus
  • Aer Lingus
  • 8/4
  • 2 total stops
  • 15h 24m 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 (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 3 April 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
Fastest return journey

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 12/8

20:25-12:50

1 stop11h 25m

London Heathrow

Fri 21/8

13:10-21:23

1 stop13h 13m

£705

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 2/9

07:15-11:35

1 stop23h 20m

London Heathrow

Wed 9/9

06:50-20:48

2 stops18h 58m

£728

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 6/5

14:25-06:55

1 stop11h 30m

London Heathrow

Wed 20/5

06:50-17:08

2 stops15h 18m

£728

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Mon 17/8

13:48-08:30

1 stop13h 42m

London Heathrow

Fri 21/8

06:50-20:28

2 stops18h 38m

£728

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Mon 14/9

05:45-10:00

2 stops23h 15m

London Heathrow

Wed 23/9

06:50-16:59

2 stops15h 09m

£729

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Mon 17/8

05:45-10:00

2 stops23h 15m

London Heathrow

Fri 21/8

14:05-16:59

2 stops31h 54m

£737
Cheapest one-way

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Wed 8/4

17:06-13:30

2 stops15h 24m

£319

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Thu 9/7

13:19-10:30

1 stop16h 11m

£342
Fastest single journey

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Thu 9/7

13:19-07:55

1 stop13h 36m

£342

KnoxvilleLondon

TYS - LHR

TYSLHR

Knoxville McGhee Tyson

Thu 9/7

10:45-08:20

2 stops16h 35m

£367

Flights are sorted by cheapest return flights first.

Deals found on 1/4

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

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 2 April 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 £406). Flying from Knoxville to London Heathrow Airport in June is currently the most expensive (average of £668). 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 £705, British Airways can have you in London Heathrow Airport from Knoxville in 11h 25m. 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, July is the cheapest month in which you can book a flight from Knoxville to London Heathrow Airport (average of £406). Flying from Knoxville to London Heathrow Airport in June is currently the most expensive (average of £668). 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
Hounslow
Gatwick
Slough
Ilford
Luton
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Bedford
Chelmsford

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 Knoxville to Heathrow?

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.