£458 Cheap flights to Key West
This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight to Key West departing on 10/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Key West flights insights and trends
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What is the cheapest month to fly to Key West?
If you aren’t able to travel to Key West during the month of September, then flying in February is also cheap. Prices for this month can be found on momondo for an average of £513.
What is the cheapest day to depart on your flight to Key West?
On average, the least expensive day to fly to Key West from United Kingdom is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £516. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to Key West on Thursday is £644.
Cheapest flights to Key West
Find the cheapest flights to Key West from your nearest city or airport
| CHEAPEST MONTH TO FLY TO KEY WEST FROM LONDON HEATHROW AIRPORT | March | 32% cheaper | Flying from London Heathrow Airport to Key West costs on average just £447 in March |
| MOST EXPENSIVE MONTH TO FLY TO KEY WEST FROM LONDON HEATHROW AIRPORT | April | 34% more expensive | It costs about £879 for flights to Key West from London Heathrow Airport in April |
| MOST POPULAR MONTH TO FLY TO KEY WEST FROM LONDON HEATHROW AIRPORT | October | 333% more users visited | More momondo users searched in flights to Key West from London Heathrow Airport in October than any other month |
Cheap Key West flight deals and tips
Summary info about Key West flight prices, duration and airlines
Best Round-Trip Price | £458 |
|---|---|
Fastest flight time | 13h 12m |
Popular in | August |
Frequently asked questions about flying to Key West
What is there to do in Key West when it’s raining?
Users planning a flight to Key West during the months of August or September should anticipate rain. There are still things to do in Key West even when it's raining, though. Many tourists kill time during rain and storms by going to shopping centres in the area, like Mallory Square.
How far in advance should I book a flight to Key West?
You are more likely to see cheaper flights to Key West from United Kingdom when booking 80 days ahead of your departure date. In general, you can expect to find flights to Key West for around £621 when searching 80 days out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Key West from United Kingdom for as low as £440 on momondo.
When did momondo last update prices for flights to Key West Airport?
Prices for flights to Key West Airport are refreshed on a daily basis.
How many operators does momondo search for flights to Key West Airport?
As of June 2025, there are 7 operators available to choose from for flights to Key West Airport.
How old do you have to be to fly to Key West Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel to Key West Airport.
What documentation or ID do you need to fly to Key West Airport?
The travel and health documents you'll need for your trip to Key West Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Key West Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
Travelling to a place near Key West?
Book flights to Key West if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal to Key West?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Key West.
Can I find flights to Key West with flexible booking policies on momondo?
momondo does allow users to show only those flights to Key West which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights to Key West?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight to Key West.
I’m not ready to book a flight to Key West right now. Can momondo alert me if prices change?
Yes. momondo can track flight prices for Key West and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.