$347+ Cheap flights from Knoxville (TYS) to Heathrow (LHR)
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 9/14. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — LHR
May 22 — May 291
Round-trip
1 adult, Economy
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Find cheap flights from Knoxville to Heathrow with Cheapflights
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Best
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One-way
Cheapest flights from Knoxville to HeathrowExplore 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 April 22, 2026.
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 April 22, 2026.
This FlightHub deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/94:00 pm
TYS
- LHR
2 stops19h 00m
Scandinavian Airlines
Fri 11/136:40 am
LHR
- TYS
2 stops20h 05m
Scandinavian Airlines
Deal found 4/17![Scandinavian Airlines logo]()
$877
This Travelocity deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/134:00 pm
TYS
- LHR
2 stops19h 00m
Scandinavian Airlines
Fri 10/237:30 pm
LHR
- TYS
2 stops33h 16m
Scandinavian Airlines
Deal found 4/19![Scandinavian Airlines logo]()
$882
This Scandinavian Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/304:00 pm
TYS
- LHR
2 stops19h 00m
Scandinavian Airlines
Tue 12/89:05 pm
LHR
- TYS
3 stops29h 40m
Scandinavian Airlines
Deal found 4/21![Scandinavian Airlines logo]()
$889
This KAYAK deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/314:00 pm
TYS
- LHR
2 stops36h 20m
Scandinavian Airlines
Sun 9/136:40 pm
LHR
- TYS
2 stops32h 06m
Scandinavian Airlines
Deal found 4/18![Scandinavian Airlines logo]()
$894
This Iberia deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/145:04 pm
TYS
- LHR
1 stop12h 46m
Iberia
Wed 9/236:15 am
LHR
- TYS
2 stops20h 00m
Iberia
Deal found 4/20![Iberia logo]()
$902
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:20 pm
TYS
- LHR
1 stop11h 00m
Delta
Wed 9/236:30 am
LHR
- TYS
2 stops16h 47m
Delta
Deal found 4/21![Delta logo]()
$906
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/24:00 pm
TYS
- LHR
2 stops15h 05m
Delta
Wed 9/911:45 am
LHR
- TYS
2 stops17h 05m
Delta
Deal found 4/20![Delta logo]()
$911
This Delta deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:20 pm
TYS
- LHR
1 stop30h 55m
Delta
Tue 9/158:40 am
LHR
- TYS
2 stops20h 07m
Delta
Deal found 4/18![Delta logo]()
$912
This Justfly.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:05 pm
TYS
- LHR
1 stop13h 45m
British Airways
Tue 9/159:15 am
LHR
- TYS
2 stops17h 39m
British Airways
Deal found 4/19![British Airways logo]()
$924
This FlightHub deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:05 pm
TYS
- LHR
1 stop13h 45m
Multiple Airlines
Tue 9/156:10 am
LHR
- TYS
2 stops20h 44m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$928
Best flights from Knoxville to HeathrowDiscover carefully curated flight deals from Knoxville to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 22, 2026.
Discover carefully curated flight deals from Knoxville to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 22, 2026.
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/24:00 pm
TYS
- LHR
2 stops15h 05m
Delta
Wed 9/911:45 am
LHR
- TYS
2 stops17h 05m
Delta
Deal found 4/20![Delta logo]()
$911
This United Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:00 am
TYS
- LHR
2 stops17h 55m
United Airlines
Wed 5/206:50 am
LHR
- TYS
2 stops15h 18m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,052
This Scandinavian Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/144:00 pm
TYS
- LHR
2 stops21h 30m
Scandinavian Airlines
Wed 9/239:05 pm
LHR
- TYS
3 stops29h 41m
Scandinavian Airlines
Deal found 4/20![Scandinavian Airlines logo]()
$1,175
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1912:00 pm
TYS
- LHR
2 stops13h 45m
Delta
Wed 9/29:55 am
LHR
- TYS
2 stops16h 33m
Delta
Deal found 4/17![Delta logo]()
$941
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:47 am
TYS
- LHR
1 stop17h 28m
Delta
Fri 9/186:30 am
LHR
- TYS
2 stops15h 04m
Delta
Deal found 4/21![Delta logo]()
$956
This Delta deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/233:59 pm
TYS
- LHR
1 stop10h 11m
Delta
Fri 8/76:30 am
LHR
- TYS
2 stops17h 14m
Delta
Deal found 4/18![Delta logo]()
$1,170
Last-minute flights from Knoxville to HeathrowDiscover last-minute flight deals from Knoxville to Heathrow. Data last updated April 22, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Heathrow. Data last updated April 22, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2210:49 am
TYS
- LHR
2 stops14h 06m
United Airlines
Wed 5/66:50 am
LHR
- TYS
2 stops18h 22m
United Airlines
Deal found 4/21![United Airlines logo]()
$1,056
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/228:45 am
TYS
- LHR
2 stops17h 25m
Delta
Wed 5/69:55 am
LHR
- TYS
2 stops15h 11m
Delta
Deal found 4/20![Delta logo]()
$1,057
This oojo deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/222:06 pm
TYS
- LHR
1 stop11h 49m
British Airways
Wed 5/611:10 am
LHR
- TYS
1 stop15h 11m
British Airways
Deal found 4/21![British Airways logo]()
$1,076
This KLM deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/224:38 pm
TYS
- LHR
1 stop13h 42m
KLM
Wed 5/69:20 am
LHR
- TYS
1 stop14h 41m
KLM
Deal found 4/20![KLM logo]()
$1,081
This Iberia deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/55:06 pm
TYS
- LHR
1 stop12h 24m
Iberia
Tue 5/126:15 am
LHR
- TYS
2 stops19h 03m
Iberia
Deal found 4/17![Iberia logo]()
$1,051
This oojo deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/51:42 pm
TYS
- LHR
1 stop12h 13m
British Airways
Tue 5/1212:30 pm
LHR
- TYS
1 stop14h 27m
British Airways
Deal found 4/17![British Airways logo]()
$1,077
This United Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:00 am
TYS
- LHR
2 stops17h 55m
United Airlines
Wed 5/206:50 am
LHR
- TYS
2 stops15h 18m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,052
This United Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:00 am
TYS
- LHR
2 stops17h 55m
United Airlines
Mon 5/115:50 pm
LHR
- TYS
2 stops31h 55m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,065
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:59 pm
TYS
- LHR
1 stop14h 16m
Delta
Wed 5/206:30 am
LHR
- TYS
2 stops17h 18m
Delta
Deal found 4/17![Delta logo]()
$1,053
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/131:59 pm
TYS
- LHR
1 stop11h 26m
Delta
Tue 5/268:40 am
LHR
- TYS
2 stops17h 45m
Delta
Deal found 4/17![Delta logo]()
$1,061
This United Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/167:18 pm
TYS
- LHR
2 stops20h 22m
United Airlines
Wed 5/276:50 am
LHR
- TYS
2 stops15h 10m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,073
This United Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:18 pm
TYS
- LHR
2 stops30h 12m
United Airlines
Tue 5/266:50 am
LHR
- TYS
2 stops22h 04m
United Airlines
Deal found 4/21![United Airlines logo]()
$1,063
One-way flights from Knoxville to HeathrowSearch for one-way flight options from Knoxville to Heathrow. Find affordable one-way fares based on user searches. Data last updated April 22, 2026.
Search for one-way flight options from Knoxville to Heathrow. Find affordable one-way fares based on user searches. Data last updated April 22, 2026.
This oojo deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/145:04 pm
TYS
- LHR
1 stop13h 11m
British Airways
Deal found 4/19![British Airways logo]()
$347
This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/145:15 pm
TYS
- LHR
2 stops13h 50m
Delta
Deal found 4/19![Delta logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/67:10 am
TYS
- LHR
2 stops23h 45m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$452
This Kiwi.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/149:10 am
TYS
- LHR
3 stops26h 15m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$456
This Kiwi.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/106:30 am
TYS
- LHR
2 stops24h 25m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$466
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:24 pm
TYS
- LHR
3 stops35h 31m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$467
This Ovago deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:50 am
TYS
- LHR
2 stops20h 15m
Aer Lingus
Deal found 4/21![Aer Lingus logo]()
$468
This Kiwi.com deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/87:10 am
TYS
- LHR
2 stops23h 45m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$480
This Kiwi.com deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/57:10 am
TYS
- LHR
2 stops32h 10m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$485
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 April 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $882 (Travelocity) |
One-way from | $347 (oojo) |
Popular in | June |
Cheapest in | January |
Average price | $815 |
Cheapflights Fare Finder
Customize 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 2,558,603 searches. Data last updated April 22, 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
Cheapest round-trip
KnoxvilleLondon
TYS - LHR
TYSLHR
Knoxville McGhee Tyson
Wed 9/2
4:00 pm-12:05 pm
2 stops15h 05m
London Heathrow
Wed 9/9
11:45 am-11:50 pm
2 stops17h 05m
$911
KnoxvilleLondon
TYS - LHR
TYSLHR
Knoxville McGhee Tyson
Wed 8/19
12:00 pm-6:45 am
2 stops13h 45m
London Heathrow
Wed 9/2
9:55 am-9:28 pm
2 stops16h 33m
$941
KnoxvilleLondon
TYS - LHR
TYSLHR
Knoxville McGhee Tyson
Fri 9/11
8:47 am-7:15 am
1 stop17h 28m
London Heathrow
Fri 9/18
6:30 am-4:34 pm
2 stops15h 04m
$956
KnoxvilleLondon
TYS - LHR
TYSLHR
Knoxville McGhee Tyson
Wed 5/6
7:00 am-5:55 am
2 stops17h 55m
London Heathrow
Wed 5/20
6:50 am-5:08 pm
2 stops15h 18m
$1,052
Quickest round-trip
KnoxvilleLondon
TYS - LHR
TYSLHR
Knoxville McGhee Tyson
Thu 7/23
3:59 pm-7:10 am
1 stop10h 11m
London Heathrow
Fri 8/7
6:30 am-6:44 pm
2 stops17h 14m
$1,170
KnoxvilleLondon
TYS - LHR
TYSLHR
Knoxville McGhee Tyson
Mon 9/14
4:00 pm-6:30 pm
2 stops21h 30m
London Heathrow
Wed 9/23
9:05 pm-9:46 pm
3 stops29h 41m
$1,175
Cheapest one-way
Quickest one-way
KnoxvilleLondon
TYS - LHR
TYSLHR
Knoxville McGhee Tyson
Mon 9/14
5:04 pm-11:15 am
1 stop13h 11m
$347
KnoxvilleLondon
TYS - LHR
TYSLHR
Knoxville McGhee Tyson
Sun 5/10
6:30 am-11:55 am
2 stops24h 25m
$466
KnoxvilleLondon
TYS - LHR
TYSLHR
Knoxville McGhee Tyson
Mon 6/1
7:24 pm-11:55 am
3 stops35h 31m
$467
KnoxvilleLondon
TYS - LHR
TYSLHR
Knoxville McGhee Tyson
Tue 5/5
7:50 am-9:05 am
2 stops20h 15m
$468
Showing 1-10 of 16 resultsSorted by cheapest first
Compare providers for flights from Knoxville to Heathrow
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Heathrow in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars |
- Most accurate provider: When it comes to deals on Knoxville-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-London Heathrow Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Knoxville-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Knoxville-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
TYS-LHR
Estimated round-trip 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 round-trip flight from Knoxville to Heathrow. Price data was last updated on April 17, 2026.
To ensure you get the cheapest price possible for a flight from Knoxville to London Heathrow Airport, you should look to book at least 85 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Knoxville to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from Knoxville to London Heathrow Airport (average of $668). Flying from Knoxville to London Heathrow Airport in June is currently the most expensive (average of $1,514). 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 to fly round-trip from Knoxville to London Heathrow Airport?
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated April 22, 2026.
See what other customers who have flown with Delta,Virgin Atlantic, andUnited Airlines from Knoxville to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Comfort
7.9
Overall
7.9
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Comfort
7.9
Overall
7.9
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Comfort
7.9
Overall
7.9
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Comfort
7.9
Overall
7.9
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Comfort
7.9
Overall
7.9
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Comfort
7.9
Overall
7.9
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
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Top 5 airlines flying from Knoxville to Heathrow
Discover the top 5 airlines that operate flights from Knoxville to Heathrow. 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 2,558,603 searches. Data last updated April 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$572 | Average$1,292 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$624 | Average$940 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$674 | Average$1,008 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$677 | Average$956 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$700 | Average$873 | FlexibilityNo cancel fee | On-time70% |