$315 Find Cheap Flights from Knoxville to the United Kingdom

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Knoxville to the United Kingdom departing on 7/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Knoxville to the United Kingdom

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
London
London1 stop$818
Edinburgh
Edinburgh2 stops$872
Manchester
Manchester2 stops$895
Birmingham
Birmingham3 stops$932
London
London1 stop$818
Edinburgh
Edinburgh2 stops$872
Manchester
Manchester2 stops$895
Birmingham
Birmingham3 stops$932

Book Cheap Knoxville to the United Kingdom Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Knoxville to the United Kingdom that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Knoxville to the United Kingdom

Mon, Jun 8 - Wed, Jun 17
Multiple Airlines Logo
10:03 pm - 10:00 am
TYS
-
LGW
30h 57m
1 stop
Multiple Airlines Logo
2:00 pm - 2:52 pm
LGW
-
TYS
29h 52m
1 stop
$818Multiple Airlines
Mon, Jun 8 - Mon, Jun 15
Multiple Airlines Logo
10:03 pm - 10:00 am
TYS
-
LGW
30h 57m
1 stop
Multiple Airlines Logo
2:00 pm - 11:34 pm
LGW
-
TYS
14h 34m
1 stop
$826Multiple Airlines
Tue, Sep 1 - Tue, Sep 15
British Airways Logo
8:25 pm - 6:55 am
TYS
-
LHR
29h 30m
1 stop
British Airways Logo
6:15 am - 9:54 pm
LHR
-
TYS
20h 39m
2 stops
$855British Airways
Mon, Sep 21 - Fri, Oct 2
American Airlines Logo
8:39 pm - 4:35 pm
TYS
-
EDI
14h 56m
2 stops
American Airlines Logo
8:35 am - 7:04 pm
EDI
-
TYS
15h 29m
2 stops
$872American Airlines
Mon, Aug 10 - Thu, Aug 27
British Airways Logo
3:01 pm - 9:05 am
TYS
-
LHR
13h 04m
1 stop
British Airways Logo
9:15 am - 9:44 pm
LHR
-
TYS
17h 29m
2 stops
$872British Airways
Mon, Sep 21 - Fri, Oct 2
Delta Logo
7:20 pm - 4:30 pm
TYS
-
EDI
16h 10m
2 stops
Delta Logo
9:00 am - 6:17 pm
EDI
-
TYS
14h 17m
1 stop
$878Delta
Mon, Sep 21 - Fri, Oct 2
American Airlines Logo
6:21 am - 7:30 am
TYS
-
EDI
20h 09m
1 stop
American Airlines Logo
8:35 am - 7:04 pm
EDI
-
TYS
15h 29m
2 stops
$883American Airlines
Fri, Aug 14 - Mon, Aug 17
United Airlines Logo
5:57 pm - 6:30 am
TYS
-
MAN
31h 33m
2 stops
United Airlines Logo
6:05 am - 8:28 pm
MAN
-
TYS
19h 23m
2 stops
$895United Airlines
Mon, Aug 17 - Fri, Aug 21
United Airlines Logo
5:57 pm - 9:40 am
TYS
-
BHX
58h 43m
3 stops
United Airlines Logo
5:55 am - 11:57 pm
BHX
-
TYS
23h 02m
2 stops
$932United Airlines
Thu, Aug 27 - Wed, Sep 2
Delta Logo
11:30 am - 7:15 am
TYS
-
LCY
14h 45m
2 stops
Delta Logo
10:00 am - 9:28 pm
LCY
-
TYS
16h 28m
2 stops
$1,126Delta
Booking Insights

KAYAK's insights & trends for Knoxville to the United Kingdom flights

Get data-powered insights and trends into flights from Knoxville to the United Kingdom to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Knoxville to the United Kingdom?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Knoxville to the United Kingdom, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Knoxville to the United Kingdom is January, when tickets cost $604 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $1,346 and $1,063 respectively.

How far in advance should I book a flight from Knoxville to the United Kingdom?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Knoxville to the United Kingdom, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Knoxville to the United Kingdom, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$347
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly with an average 21% increase in price.
Flight from Knoxville to London Heathrow Airport

FAQs - booking United Kingdom flights

  • How does KAYAK find such low prices on flights from Knoxville to the United Kingdom?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Knoxville to the United Kingdom.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Knoxville to the United Kingdom?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Knoxville to the United Kingdom is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Knoxville to the United Kingdom?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Knoxville to the United Kingdom with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Knoxville to the United Kingdom?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Knoxville to the United Kingdom up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Knoxville to the United Kingdom

 
Need help choosing which airline to fly with from Knoxville to the United Kingdom? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8359 reviews
7.2Food
7.8Entertainment
8.5Crew
7.9Comfort
8.1Boarding
Airline reviews

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

8.0 ExcellentLorna, Mar 2026
LAX - LIH
Read more Delta reviews

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I haven’t flown economy in over 20 years but it was not bad. Room by my feet for my bag and seat was roomy enough. Surprised in a good way.

The flight was delayed 90 minutes The Gate was wrong The Restroom on Aircraft was not clean There was a half used water bottle in my seat

Delta is always a wonderful experience. A clean plane and the crew is really friendly.

Too many people are taking up space in the overhead bins with their extra piece of luggage. Since they cannot fit their backpacks or extra luggage piece under the seat in front of them, they store it in the overheads and thus taking up room for other passengers. It wasn’t only one or two persons; more like 12 or 13 passengers.

Excellent service, I love the soft blush pink mood lighting on the 767-400ER during meal service. The overhead gasper vents on the 767-400ER were also very strong with a lot of airflow to keep me comfortable on my flight.

This was the worse experience. They delayed our flight twice and we still had to find another flight to get home sooner which was alos delayed. Also, the flight attendant named Ginny on DL9890 leaving at 4:13pm on 3/23/26 was extremely rude.

I love Delta the flight attendants were personable and the flight arrived 1/2 earlier thanks expected. All a plus. The gate agent was a bit flustered but even with that I still had a good experience. Her supervisor assisted me.

The return flight was great. The flight out to CDG was overbooked, and we were forced to check in a small carry-on at the get immediately before the flight, before getting out the stuff we needed on the plane.

Got to fly my favorite plane, the Boeing 767-400ER, to Milan. The soft blush pink mood lighting during meal service was very beautiful and gorgeous. The service was top-notch, and our flights were on time. I highly recommend Delta.

Seating and zone. The minor I went with didn’t even seat close to me

My seat 3G did not go down fully and the buttons were not working properly

Food has been disappointing in both legs of flight to india

Great staff great experience, made a 2 hour delay very bearable

Great staff, great experience, made a 2 hour delay very bearable

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

The business class seat is exceptional. I wish the food is more palatable.

Wonderful in-seat entertainment with seatback screens and huge selection of quality movies. The ability to bluetooth connect headphones was amazing.

the entire flight felt off. The crew seemed uninterested and disengaged. The food service was really bad - overcooked, bland, weird food service. They actually woke us up to serve chicken wraps in the middle of the night, after dinner and before breakfast. Made no sense. Ultimately, I was glad they did though, because the breakfast had been held for so long it was inedible. Eggs, potatoes, sausage - all disgusting. We were asked to "honor" the lavatories for premium customers and stay in our own cabin: this was also strange. So people in economy didn't pay enough to use the closest toilet to them??? It's a toilet. All in all, not the experience I have come to expect from United Airlines. The return flight from Paris to SFO was better, btw.

Smooth and easy boarding, comfortable for the entire 5 hour flight, and the seat back entertainment was great! I appreciated all the features, from location info and maps, movies, the ability to connect with Bluetooth headphones, and good selection of movies. Food was good, normal airline snacks (I didn’t purchase anything)

Overall, the flight was good. Lounge access should be with all business class tickets.

They promise free wi-fi prior to boarding and then once on board you are informed you have to purchase wifi even after being a mileagePlus member.

I've been flying American mostly, and it's been very frustrating. This united flight makes me realize maybe the issue isn't flying, but the airline. United was a significantly better experience. The plane was more comfortable, with a normal amount of leg room (vs the ridiculous reductions AA has made), more comfortable seats, screens to watch movies. It was a much better experience!

Awful. No counter attendants. No dinner offered due to delays.

Horrible service no Wi-Fi connection on both leg of the flight and they are refusing to fix bad service

3 hour delay…. Nearly 2 hours sitting on tarmac. Do better, United. Or at least have the sense to not say “we hope you enjoyed your flight with us” upon disembarking.

Flight was on-time, boarding was flawless and the crew was friendly.

Tv screens and movie selection v good. Friendly staff. They were really worried about max capacity and room for carryons. That is never fun but i had no problem finding space when I boarded.

Horrible experience upon landing. Probably more due to DCA utter incompetence than AA.

Not to have gotten delayed by 2+ hours for the fourth straight American flight. They're the worst.

American has been able to implement an algorithm that makes it possible for nearly every one of my evening flights to be late. Congratulations!

This was a horrible experience. I’ve experienced several delays at this point and still not home. I was supposed to be home by 8:30 last night and here I sit at 7 am on a plane STILL unable to go home because of American Airlines.

My flight to London from Philadelphia was cancelled due to weather.

It was good. But the gate team made me check my carry on when there was plenty of space for my luggage on the plane. Otherwise our trip was fine.

The flight was good. We had to spend almost an hour on the tarmac when we arrived in Dallas. Waiting for a gate. What’s the point of arriving early if you have no gate to park at?

Gate was overcrowded. Gate agents performed very well. Flight crew was top notch! Efficient & professional & courteous. Both meals not thermalized well. Dinner main dish was actually cold in the center. Almost inedible. Breakfast sandwich was lukewarm.

The gate agent made me check my carry-on in Denver, even though I've traveled all over taking this case on the plane. Beware folks. Food in Premium Economy was quite good - excellent blanket! Flight attendants on the Heathrow-to-Budapest flight on 3-27-2026 were quite snappy. I got a frown when asked to unscrew the water bottle cap for me (I had a cast on my right arm). Also woke up right when they were handing out biscuits. She had given my rowmates one and was in the process of giving water when I asked for a biscuit. She scolded me and said, "You snooze, you lose". She did give me one, but I thought that comment was uncalled for.

Wish the food and overall service was better. They treat Business class passengers same as economy

WiFi wasn’t available to economy until the end of the flight.

Very good staff members with sincere passion and responsibility in their job.

Very please with the seating that the Kayak staff booked for us!

Worth every penny to upgrade to BC. Treated and felt more like First Class

Good service, food and comfort in World Traveller Plus. Entertainment was poor - no wifi on the way out and barely working on the way back. Not a great choice of entertainment on the seat back tv.

They had us seating down for one hour just waiting on the plane

Flying with BA is always a good experience—even in economy class. It is better if in business and first class. Timely, breeze through security and timely connections

We waited at BOS at the gate for an hour and couldn’t get a drink or anything. Once in the air the service, food and ride was excellent.

Everything you need to know for your flight from Knoxville to the United Kingdom

Information on your arrival and departure airports