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Cheap flights from Knoxville to London Heathrow Airport from £289

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 28/10. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — LHR
17 Sep — 24 Sep1
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 18 August 2026.

Tue 8/1207:10 -
1 stop19h 40m
Tue 15/1208:40 -
2 stops17h 48m
Deal found 13/8£639
Mon 2/1111:31 -
1 stop17h 54m
Wed 11/1106:15 -
2 stops22h 32m
Deal found 14/8£651
Tue 22/913:10 -
1 stop12h 45m
Tue 29/906:50 -
2 stops15h 18m
Deal found 16/8£654
Mon 2/1111:20 -
2 stops14h 50m
Wed 11/1106:50 -
2 stops17h 46m
Deal found 14/8£656
Tue 22/913:10 -
2 stops15h 50m
Tue 29/906:55 -
2 stops22h 04m
Deal found 16/8£657
Tue 8/1214:40 -
1 stop10h 45m
Tue 15/1208:55 -
1 stop18h 27m
Deal found 13/8£661
Sat 26/918:03 -
2 stops21h 37m
Tue 6/1007:30 -
2 stops21h 29m
Deal found 17/8£665
Tue 3/1106:45 -
2 stops19h 25m
Thu 12/1118:00 -
2 stops34h 59m
Deal found 14/8£667
Wed 30/910:42 -
2 stops14h 53m
Wed 7/1007:30 -
2 stops18h 19m
Deal found 16/8£668
Sat 31/1013:55 -
2 stops36h 35m
Thu 12/1118:00 -
2 stops34h 59m
Deal found 14/8£670

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 18 August 2026.

Round-trip from

£639

One-way from

£289

Popular in

June

Cheapest in

April

Average price

£784
Delta
  • Delta
  • 8/12-15/12
  • 3 total stops
  • 37h 28m total
  • Knoxville to London
Search Deals
28/10
  • 28/10
  • 2 total stops
  • 28h 20m total
  • Knoxville to London
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£164 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£25 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 18 August 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 Knoxville McGhee Tyson - LHR London Heathrow

TYSLHR

Knoxville McGhee Tyson

Tue 8/12

14:40-06:25

1 stop10h 45m

London Heathrow

Tue 15/12

08:55-22:22

1 stop18h 27m

£661
Fastest return journey

KnoxvilleLondon

TYS Knoxville McGhee Tyson - LHR London Heathrow

TYSLHR

Knoxville McGhee Tyson

Mon 19/10

15:41-06:55

1 stop10h 14m

London Heathrow

Thu 29/10

11:45-21:49

1 stop14h 04m

£682

KnoxvilleLondon

TYS Knoxville McGhee Tyson - LHR London Heathrow

TYSLHR

Knoxville McGhee Tyson

Sun 10/1

12:00-11:40

1 stop18h 40m

London Heathrow

Sun 17/1

08:40-20:40

2 stops17h 00m

£682

KnoxvilleLondon

TYS Knoxville McGhee Tyson - LHR London Heathrow

TYSLHR

Knoxville McGhee Tyson

Fri 2/10

06:00-06:30

2 stops19h 30m

London Heathrow

Wed 14/10

09:00-23:59

2 stops19h 59m

£694

KnoxvilleLondon

TYS Knoxville McGhee Tyson - LHR London Heathrow

TYSLHR

Knoxville McGhee Tyson

Fri 2/10

08:30-10:25

1 stop20h 55m

London Heathrow

Fri 9/10

10:00-21:55

1 stop16h 55m

£712

KnoxvilleLondon

TYS Knoxville McGhee Tyson - LHR London Heathrow

TYSLHR

Knoxville McGhee Tyson

Sun 10/1

19:13-11:35

1 stop11h 22m

London Heathrow

Mon 18/1

09:55-21:21

1 stop16h 26m

£719

KnoxvilleLondon

TYS Knoxville McGhee Tyson - LHR London Heathrow

TYSLHR

Knoxville McGhee Tyson

Sun 13/12

12:00-10:15

1 stop17h 15m

London Heathrow

Thu 17/12

07:00-00:15

2 stops22h 15m

£722

KnoxvilleLondon

TYS Knoxville McGhee Tyson - LHR London Heathrow

TYSLHR

Knoxville McGhee Tyson

Sun 13/12

10:30-07:05

2 stops15h 35m

London Heathrow

Thu 17/12

10:50-18:26

1 stop12h 36m

£739

KnoxvilleLondon

TYS Knoxville McGhee Tyson - LHR London Heathrow

TYSLHR

Knoxville McGhee Tyson

Fri 11/9

06:00-06:45

1 stop19h 45m

London Heathrow

Fri 18/9

06:50-16:58

2 stops15h 08m

£749

KnoxvilleLondon

TYS Knoxville McGhee Tyson - LHR London Heathrow

TYSLHR

Knoxville McGhee Tyson

Wed 2/9

13:53-06:45

1 stop11h 52m

London Heathrow

Wed 9/9

06:50-20:24

2 stops18h 34m

£780

Flights are sorted by cheapest return flights first.

Deals found on 15/8

Showing 1-10 of 21 resultsSorted by cheapest first
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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

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

Currently, April is the cheapest month in which you can book a flight from Knoxville to London Heathrow Airport (average of £620). Flying from Knoxville to London Heathrow Airport in June is currently the most expensive (average of £1,205). 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?

Airfare is below average for this route at the moment.

Knoxville to London Heathrow Airport flights typically cost between £691 and £884 in December.
The cheapest return price found within the last 5 days was £639 on Delta (8 Dec–15 Dec).

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 £661, Delta can have you in London Heathrow Airport from Knoxville in 10h 45m. 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, April is the cheapest month in which you can book a flight from Knoxville to London Heathrow Airport (average of £620). Flying from Knoxville to London Heathrow Airport in June is currently the most expensive (average of £1,205). 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
Hounslow
Milton Keynes
Luton
Gatwick
Wembley
Ilford
Slough
Hayes
Croydon
Colchester
Brentford
Eastbourne
Northampton
Watford
Southend-on-Sea
Swindon
Enfield
Kingston upon Thames
Southall
Poole

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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?

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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?

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