London's Six Airports: Which One You Actually Want

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The instinct is to pick the nearest airport, and the instinct is wrong in a specific, measurable way. The London Assembly Research Unit found in October 2025 that Heathrow is the second closest airport to central London measured in a straight line, and that it nonetheless has the shortest express train journey of all six, at 15 minutes to a central London station. London City, which is genuinely the closest, takes 20 minutes. Stansted, far out on the Essex side of the city, takes 47.

Distance from a map pin is a poor predictor of how long a journey takes, because airports are built on land that is cheap because it is far from where people live, and the rail lines that serve them were built for a different purpose than the one you need. The choice between six airports is decided by four things: what kind of flights each one carries, how you will get to it, how reliably it runs, and how much of its traffic is going somewhere else entirely. The Civil Aviation Authority now measures all four.

What each airport is actually for

The Civil Aviation Authority's Departing Passenger Survey interviews roughly 175,000 departing passengers a year at eight UK airports, at the gate before boarding, and weights the answers by the actual departing passenger numbers at each airport. The 2025 results separate the airports cleanly.

Passenger volumes are the survey's own figures for 2025. Birmingham appears in the same table on 13 million, and London City and East Midlands fall below it. Ratings run from zero to ten. In the survey's connecting column only Heathrow, Gatwick and Stansted are shown with a figure; Luton and London City both rank below Stansted's 3 per cent.

Two columns carry most of the information. London City has the highest proportion of business travellers of any surveyed airport, at 40 per cent, which reflects what it sells: a short runway, a single runway, no widebody aircraft, and a schedule built for the morning and evening corporate shuttle to European business cities. It has the second highest satisfaction rating of the eight at 9.04. Stansted has the lowest, at 7.77, despite carrying more passengers than Luton.

Heathrow is the only London airport in the survey where a quarter of the people leaving are not travelling to a London destination at all.

Getting there is the part people get wrong

The public transport figures in the survey are airport surface access share: the proportion of departing passengers who travelled to the airport on public transport rather than by private car. London City leads on 66 per cent, Stansted follows on 48 per cent, Gatwick on 44 per cent and Heathrow on 42 per cent. Luton records 34 per cent, the lowest of the five London airports in the survey.

Two things follow from that column. The first is that the airports most likely to feel remote are often the best served by rail, because Stansted and Gatwick were built as long distance airports and were wired for trains rather than for commuters. The second is that the survey measures mode share and nothing about cost, so it cannot tell you which airport is cheaper to reach. Those are separate questions and they need separate figures.

The journey times themselves come from the London Assembly Research Unit, published October 2025, drawing on London and Partners data accessed in September 2025: Heathrow 15 minutes, London City 20 minutes, Gatwick 30 minutes, Luton 45 minutes, Stansted 47 minutes, Southend 52 minutes.

The 47 minute figure for Stansted is the one that surprises people, because Stansted is further away than Heathrow on almost any map, and it takes three times as long. The reason is the rail geography, and it is worth understanding before you book.

How much of the traffic is going somewhere else

The survey's connecting column changes how you should read a route list. At Heathrow, 26 per cent of departing passengers in 2025 were connecting, meaning they arrive at the airport and leave again on another aircraft. Gatwick's figure was 5 per cent and Stansted's 3 per cent.

The London Assembly Research Unit, using Department for Transport data for 2023, put Heathrow's transfer share at 27 per cent, against 7 per cent at Gatwick, 5 per cent at Stansted and 4 per cent at Luton. The two datasets are consistent with each other across a two year gap.

The trend is the interesting part. Heathrow's transfer share fell ten percentage points over ten years, from 37 per cent in 2013 to 27 per cent in 2023, although it rose two points between 2022 and 2023. A Heathrow that connects fewer of its passengers is an airport whose routes are more useful to London residents, because a larger share of the schedule terminates where it started.

For a traveller, the practical meaning is that Gatwick and Stansted are almost entirely point to point airports. If your itinerary is built around a connection, Heathrow is the only London airport where a large number of onward flights exist at once.

Punctuality differs more than the maps suggest

A separate section of the London Assembly data pack, drawing on Department for Transport table AVI0103 published in December 2024, records how London airports performed in 2023. Gatwick ran the longest average delay of any of the 23 UK reporting airports, at 27 minutes, and had the lowest share of flights arriving on time, at 55 per cent. London City had the shortest average delay of any London airport, at 13 minutes, and the highest share on time, at 72 per cent.

Those are annual figures from a single year and the year to year variation is large, but the spread between a 13 minute and a 27 minute average delay is larger than the spread between most of the other differences in this article.

A way to decide

Start with the flight, not the airport. Find out which London airports your destination is actually served from, because a route that exists only from Stansted removes the decision entirely. Where two airports both serve the route, compare the total journey time from your front door, not the fare: the express train time plus the journey to the station plus the transfer, against the fare difference.

Where that is close, the 2025 survey numbers give you the tiebreak. A business trip to a European city is better served by London City, which combines the highest public transport share, the best punctuality and the highest business share in the country. A leisure trip to the Mediterranean and North America is a Heathrow or Gatwick decision, and the connecting share tells you which one will offer more options if something goes wrong. A long holiday with a heavy bag is a decision where the airline's own baggage fee schedule usually matters more than the airport, because the cost of a hold bag at the airport can exceed the cost of the flight.

Then search both airports on the same dates before committing. FlyraGo, which supported the research behind this guide, compares fares across airlines and travel agencies for whichever airports you select and hands you to the seller you choose, with no markup and no account; the same comparison is worth doing on whichever search tool you prefer, because the point is seeing both airports on one screen rather than reasoning about which one should be cheaper.

What these figures cannot tell you

They cannot price anything. The Civil Aviation Authority's survey reports passenger characteristics, mode share, connections, purpose of travel and satisfaction. It does not collect fares, and no official source publishes a consistent fare comparison across London airports for the same route on the same date, because fares change by the minute and are set per flight.

They also cannot predict your individual journey. Stansted's 47 minute express time is a scheduled figure for the airport to a central London terminal; a specific train may not connect with a specific arrival, and a night landing changes the calculation completely. And the punctuality figures come from 2023, the most recent year in that Department for Transport table at the time of writing, so they describe the recent past rather than the year you will travel.

Use them to narrow the field and to know which airport is not worth considering, then price the two that survive.