Cheap flights from Knoxville to London Heathrow Airport from $507
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to London Heathrow Airport departing on 5/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Knoxville to London
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
United Airlines flights from Knoxville to London Heathrow Airport
Our best United Airlines deals on Knoxville to London Heathrow Airport flight tickets
KLM flights from Knoxville to London Heathrow Airport
Our best KLM deals on Knoxville to London Heathrow Airport flight tickets
See travel insights to London from
How to get the cheapest flight ticket from Knoxville to London Heathrow Airport
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Knoxville and London Heathrow Airport?
What is the cheapest month to fly to London Heathrow Airport?
The month of February is, on average, the cheapest month to fly to London Heathrow Airport from Knoxville, with most prices found around $678. If you’re not able to fly to London Heathrow Airport in February, then September is your next best option. Flight prices from Knoxville to London Heathrow Airport during September average around $755.
What is the cheapest day to depart on your flight to London Heathrow Airport?
Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $834. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $1,000.
What is the cheapest time of day to depart on your flight to London Heathrow Airport?
According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Knoxville to London Heathrow Airport in the morning for as low as $823. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $967.
How far in advance should I book a flight to London Heathrow Airport?
You are more likely to see cheaper flights to London Heathrow Airport from Knoxville when booking 8 weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $936 when searching 8 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Knoxville for as low as $725 on momondo.
What is the cheapest airline that flies from Knoxville McGhee Tyson to London Heathrow?
Air Canada is the most popular carrier operating from Knoxville McGhee Tyson to London Heathrow
What airlines fly to London Heathrow Airport?
American Airlines, United Airlines and British Airways are the top three most popular airlines that fly to London Heathrow Airport from Knoxville according to our data. American Airlines is the first choice among our users, with 61% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 6 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.
When to book flights from Knoxville to London Heathrow Airport
Cheap Knoxville to London Heathrow Airport (TYS to LHR) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Knoxville to London Heathrow Airport
How far is Knoxville McGhee Tyson to London Heathrow by plane?
London Heathrow is 4065.6 mi away from Knoxville McGhee Tyson. In terms of flight time, this usually takes a little over 10h 04m.
When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to London Heathrow Airport?
Prices for flights from Knoxville McGhee Tyson Airport to London Heathrow Airport are updated daily.
How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to London Heathrow Airport?
As of April 2025, there are 5 operators available to choose from for flights from Knoxville McGhee Tyson Airport to London Heathrow Airport.
How old do you have to be to fly from Knoxville McGhee Tyson Airport to London Heathrow Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Knoxville to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Knoxville to London Heathrow Airport is American Airlines (47% of total bookings). The next most popular airlines are British Airways (24%), United Airlines (18%), and Delta (6%).
Best airlines flying from Knoxville to London Heathrow Airport
Compare and see reviews for airlines that fly from Knoxville to London Heathrow Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $661 | Free Cancellation | Rating 6.6 6,767 reviews | |||
| PriceFrom $676 | Free Cancellation | Rating 7.4 8,667 reviews | |||
| PriceFrom $688 | Free Cancellation | Rating 8.0 7,917 reviews | |||
| PriceFrom $703 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $768 | Free Cancellation | Rating 7.4 642 reviews |
Traveling to a place near London?
Book flights to London if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Knoxville to London?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Knoxville to London for you.
Can I find flights from Knoxville to London with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Knoxville to London flights to just show those with flexible booking policies.
How can momondo help me find flights from Knoxville to London?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Knoxville.
I’m not ready to book a flight from Knoxville to London right now. Can momondo alert me if prices change?
Price alerts on flights to London from Knoxville are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.