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Cheap flights from London Heathrow Airport to Knoxville from £426

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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — TYS
4 Jun — 11 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Knoxville

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Knoxville
Explore the most affordable flight options available from Heathrow to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 May 2026.

Tue 7/716:40
LHR
-
TYS
1 stop12h 14m
United Airlines
Wed 5/810:18
TYS
-
LHR
1 stop15h 27m
United Airlines
Deal found 1/5£612
Mon 15/611:45
LHR
-
TYS
2 stops17h 09m
Virgin Atlantic
Mon 22/615:59
TYS
-
LHR
1 stop10h 11m
Virgin Atlantic
Deal found 1/5£690
Wed 9/906:50
LHR
-
TYS
2 stops15h 09m
United Airlines
Wed 23/913:35
TYS
-
LHR
1 stop12h 20m
United Airlines
Deal found 2/5£693
Tue 16/620:55
LHR
-
TYS
2 stops31h 06m
Virgin Atlantic
Tue 23/611:55
TYS
-
LHR
2 stops18h 25m
Virgin Atlantic
Deal found 2/5£707
Wed 8/710:30
LHR
-
TYS
2 stops18h 29m
American Airlines
Wed 29/713:43
TYS
-
LHR
2 stops15h 27m
American Airlines
Deal found 1/5£714
Fri 13/1106:35
LHR
-
TYS
2 stops17h 42m
United Airlines
Tue 17/1114:00
TYS
-
LHR
2 stops15h 25m
United Airlines
Deal found 4/5£715
Wed 8/717:05
LHR
-
TYS
1 stop23h 40m
American Airlines
Tue 28/713:43
TYS
-
LHR
2 stops15h 27m
American Airlines
Deal found 4/5£716
Thu 8/1007:25
LHR
-
TYS
2 stops21h 30m
United Airlines
Sun 11/1015:40
TYS
-
LHR
1 stop35h 05m
United Airlines
Deal found 2/5£718
Wed 8/715:35
LHR
-
TYS
1 stop13h 24m
American Airlines
Mon 27/718:32
TYS
-
LHR
1 stop10h 58m
American Airlines
Deal found 4/5£719

Find flight deals from Heathrow to Knoxville

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Knoxville (TYS). 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 5 May 2026.

Round-trip from

£612

One-way from

£426

Popular in

December

Cheapest in

September

Average price

£696
United Airlines
  • United Airlines
  • 7/7-5/8
  • 2 total stops
  • 27h 41m total
  • London to Knoxville
Search Deals
10/6
  • 10/6
  • 3 total stops
  • 45h 40m total
  • London to Knoxville
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£84 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 May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Knoxville 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 5 May 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Knoxville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

Wed 9/9

06:50-16:59

2 stops15h 09m

Knoxville McGhee Tyson

Wed 23/9

13:35-06:55

1 stop12h 20m

£693
Fastest return journey

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

Wed 9/9

13:45-21:54

1 stop13h 09m

Knoxville McGhee Tyson

Wed 23/9

13:45-06:50

1 stop12h 05m

£707

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

Wed 1/7

11:15-21:49

1 stop15h 34m

Knoxville McGhee Tyson

Wed 15/7

18:36-13:05

1 stop13h 29m

£744

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

Tue 14/7

06:15-21:58

2 stops20h 43m

Knoxville McGhee Tyson

Wed 29/7

18:30-10:20

1 stop10h 50m

£746

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

Wed 1/7

10:45-21:41

1 stop15h 56m

Knoxville McGhee Tyson

Wed 15/7

15:59-13:05

2 stops16h 06m

£754

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

Mon 18/5

08:40-20:28

2 stops16h 48m

Knoxville McGhee Tyson

Wed 3/6

17:59-13:15

1 stop14h 16m

£760

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

Thu 9/7

06:15-17:57

2 stops16h 42m

Knoxville McGhee Tyson

Mon 27/7

06:00-06:50

1 stop19h 50m

£769
Cheapest one-way

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

Wed 17/6

08:45-20:48

3 stops41h 03m

£493

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

Wed 17/6

09:00-23:54

2 stops19h 54m

£535

LondonKnoxville

LHR - TYS

LHRTYS

London Heathrow

Wed 15/7

09:10-11:50

3 stops55h 40m

£535

Flights are sorted by cheapest return flights first.

Deals found on 4/5

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to Knoxville

Have a flexible travel schedule? Discover the best time to fly to Knoxville from Heathrow 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 London Heathrow Airport to Knoxville

How far ahead should I book a flight from London Heathrow Airport to Knoxville?

The price you pay for your flight from London Heathrow Airport to Knoxville may vary depending on when you book. For the best chance of a lower fare, look to book 65 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 London Heathrow Airport to Knoxville?

Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Knoxville (average of £512). Flying from London Heathrow Airport to Knoxville in December is currently the most expensive (average of £1,008). 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 London Heathrow Airport to Knoxville?

Reviews of airlines servicing Knoxville

Get insights into the airlines that provide service to Knoxville. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Knoxville. Reviews last updated 5 May 2026.
Read reviews from past customers who have flown with Finnair,United Airlines, andVirgin Atlantic from London Heathrow Airport to Knoxville. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,392 reviews
Check prices

Comfort

7.4

Crew

8.2

Food

6.7

Entertainment

6.9

Boarding

7.7

Overall

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
Finnair
7.6
Good
1,392 reviews
Finnair
7.6
Good
1,392 reviews
Check prices

Comfort

7.4

Crew

8.2

Food

6.7

Entertainment

6.9

Boarding

7.7

Overall

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
United Airlines
7.4
Good
9,683 reviews
Finnair
7.6
Good
1,392 reviews
Check prices

Comfort

7.4

Crew

8.2

Food

6.7

Entertainment

6.9

Boarding

7.7

Overall

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
Virgin Atlantic
7.4
Good
688 reviews
Finnair
7.6
Good
1,392 reviews
Check prices

Comfort

7.4

Crew

8.2

Food

6.7

Entertainment

6.9

Boarding

7.7

Overall

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
Lufthansa
6.8
Okay
7,974 reviews
Finnair
7.6
Good
1,392 reviews
Check prices

Comfort

7.4

Crew

8.2

Food

6.7

Entertainment

6.9

Boarding

7.7

Overall

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
British Airways
6.7
Okay
7,944 reviews
Finnair
7.6
Good
1,392 reviews
Check prices

Comfort

7.4

Crew

8.2

Food

6.7

Entertainment

6.9

Boarding

7.7

Overall

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Knoxville. 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 into for flights to Knoxville from London Heathrow?

    If you book a flight to Knoxville from London Heathrow, you will be flying to 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 London Heathrow to McGhee Tyson per day from 5 different airlines.

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

    United Airlines, KLM, and British Airways can get you from London Heathrow Airport to Knoxville in just under 15h 09m. Your travel time can differ by up to 5h 34m. The distance from London Heathrow Airport to Knoxville is about 4076 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from London Heathrow Airport to Knoxville round-trip?

    Currently priced at £451, Lufthansa will fly you from London Heathrow Airport to Knoxville and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and British Airways - these airlines can fly you to your destination from £462 and £471, respectively. These flights start at 36% lower than the current average price 3 months from now.

  • Can I find deals for flights from Heathrow to Knoxville that include hotel bookings?

    Yes. In addition to deals on Heathrow to Knoxville flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Knoxville?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Knoxville.

  • Can I find deals for business class flights from Heathrow to Knoxville?

    Yes. Cheapflights offers flight deals from Heathrow to Knoxville 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 London Heathrow Airport to Knoxville?

    Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Knoxville (average of £512). Flying from London Heathrow Airport to Knoxville in December is currently the most expensive (average of £1,008). 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 Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Cherokee

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Top 5 airlines flying from Heathrow to Knoxville

Discover the top 5 airlines that operate flights from Heathrow to Knoxville. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 5 May 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£451Average£760FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£462Average£613FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£471Average£644FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£502Average£667FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapest£505Average£639FlexibilityNo cancel feeOn-time76%
Search Finnair flights

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 Heathrow to Knoxville?

Cheapflights helps you search for flights from Heathrow to Knoxville via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights helps you find that perfect flight to Knoxville from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes! Cheapflights helps users easily find flights from Heathrow to Knoxville with no change fees.

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

Yes, Cheapflights offers price alerts on Heathrow to Knoxville flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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