Flying in or out of London means choosing from five different airports, and getting that choice wrong can add hours to your journey or double your travel costs. Heathrow, Gatwick, Stansted, Luton and London City each serve different routes, different airlines and different parts of the city, so knowing which one suits your trip matters just as much as booking the flight itself. This guide breaks down each of the five London airports, compares how easy they are to reach from towns like Slough, Reading and the wider Berkshire area, and explains how a fixed fare taxi transfer takes the guesswork out of getting there on time.
Why London Has Five Airports in the First Place
Unlike most major cities that operate from a single hub, London spreads its air traffic across five separate airports positioned in a rough ring around the city. This setup exists partly because of history and partly because of sheer demand. London is one of the busiest aviation markets in the world, and no single airport could handle the volume of passengers, cargo and airline schedules the city generates.
Each airport ended up specialising in a different niche. Heathrow grew into the long haul and business hub. Gatwick picked up a mix of long haul and leisure routes. Stansted and Luton became the budget airline strongholds. London City carved out a corner for short business hops into Europe. The result is that “flying to London” can mean five very different journeys depending on which airport your ticket names, which is why so many travellers get caught out booking transport before checking exactly where they are landing.
Heathrow Airport (LHR)
Heathrow is the biggest and busiest of the five, and for most international travellers it is still the default choice. It handles the highest number of long haul routes, the widest range of airlines, and the most terminals, currently Terminals 2 through 5. If your flight involves a major international carrier or a transatlantic route, there is a strong chance it lands here.
The airport sits close to the M4 and M25, which makes it one of the more straightforward airports to reach by road from west London and the Thames Valley towns. From Slough specifically, Heathrow is one of the shortest transfers of all five airports, typically around 25 minutes along the M4 in normal traffic. That proximity is a big reason why a dedicated Heathrow airport taxi service tends to be the most requested transfer for anyone travelling from the Slough, Windsor or Maidenhead area.
Heathrow is also well connected by rail through the Elizabeth Line and Heathrow Express, but for early morning departures, late night arrivals or when travelling with heavy luggage, a pre-booked taxi with flight tracking remains the more reliable option, since it removes the risk of missed connections or last train cut-off times.
Gatwick Airport (LGW)
Gatwick sits south of London and is the second busiest of the five airports, split between its North and South terminals. It carries a strong mix of long haul leisure routes, European short haul and a large charter and holiday flight presence, which makes it a common choice for families heading off on package holidays as well as business travellers on European routes.
From Slough and the Berkshire area, Gatwick is a longer run than Heathrow, typically around an hour via the M25, since it sits on the opposite side of London. That extra distance is worth planning around, particularly for early flights, because M25 traffic can be unpredictable at peak times. A fixed fare Gatwick airport transfer with a set price agreed before you travel means the fare stays the same even if the drive takes longer than expected, which is a real advantage over a metered cab on a route this length.
Rail links into Gatwick are solid, with the Gatwick Express running direct from Victoria, but for anyone outside central London a door to door taxi still tends to be quicker once you factor in getting to a mainline station first.
Stansted Airport (STN)
Stansted sits to the northeast of London and has become the main base for several low cost carriers running short haul European routes. If you are booking a budget airline ticket to a European city break, there is a good chance Stansted is where you will be flying from.
The distance from Slough to Stansted is one of the longer transfers among the five airports, generally around 90 minutes depending on traffic on the M25 and M11. Because Stansted handles a lot of early departures for budget flights, and because the Stansted Express doesn’t run all night, a pre-booked Stansted airport transfer is often the more practical choice for anyone catching a first flight out or landing on a late arrival with no other transport running.
Luton Airport (LTN)
Luton sits north of London and, like Stansted, is heavily used by budget and charter airlines. It has grown significantly in recent years and now handles a busy mix of leisure and European short haul traffic. For travellers in the Thames Valley and Berkshire area, Luton is roughly comparable to Stansted in terms of journey time, generally close to an hour via the M1 and M25, though this varies depending on your exact starting point.
A Luton airport transfer booked in advance with flight tracking included takes care of the uncertainty around this route, since drivers can monitor your flight status and adjust pickup or drop off timing if a flight is delayed, without any extra charge added on top of the fixed fare.
London City Airport (LCY)
London City is the smallest and most centrally located of the five airports, sitting in the Docklands area close to Canary Wharf. It mainly serves short haul business routes into European financial centres, along with a handful of flights to US destinations that route through Shannon for pre-clearance. Because of its small runway and steep approach, it only accommodates smaller aircraft, which keeps passenger numbers lower than the other four airports.
For travellers coming from Slough or the wider Berkshire region, London City is generally the least practical option purely because of distance and the amount of central London driving involved to reach it. Unless your itinerary specifically requires this airport for a short European business hop, one of the other four is usually a simpler transfer from this part of the country.
Which London Airport Is Easiest From Slough and Berkshire
If you are travelling from Slough, Windsor, Maidenhead, Ascot or the surrounding towns, the honest answer is that Heathrow will almost always be your quickest and most convenient option. Its proximity along the M4 corridor puts it well ahead of the other four in terms of journey time, and it also offers the widest choice of routes and airlines, so there is a good chance your destination is served from there anyway.
Gatwick, Luton and Stansted all sit roughly an hour or more away depending on the M25 at the time you travel, and while none of them are unreasonable, they do require more careful timing around traffic, particularly during rush hour or school holiday periods when the M25 gets busy. London City, given its location, is really only worth the drive if your specific flight departs from there.
This is one of the reasons a company that runs taxi transfers to all four main airports is worth having on your contacts list rather than trying to book separately depending on where you are flying from each time. Consistent pricing, familiar drivers and one number to call regardless of which airport you land at removes a lot of the friction from regular travel.
Taxi, Train or Coach: Comparing the Options
Public transport into London’s airports has improved a lot over the past decade, and for solo travellers with light luggage heading into central London first, rail links like the Elizabeth Line or Gatwick Express can be genuinely competitive. But for door to door journeys from towns outside London, the picture changes.
A taxi collects you from your actual front door, at any hour, and drops you directly at the terminal, with no need to drag luggage between a local station, a mainline platform and then an airport shuttle. For early departures before public transport starts running, or late arrivals after it stops, a taxi is often the only realistic option. Coaches can be cheaper on paper, but journey times are usually longer and less predictable, and they rarely run frequently enough to fit around an odd-hour flight.
The other factor worth weighing up is cost certainty. A fixed fare agreed at the point of booking means you know exactly what the journey will cost before you leave home, regardless of how the traffic behaves on the day. That is a meaningful difference compared with train fares that vary by time of day, or a metered taxi where the final cost depends entirely on how the roads are running.
Booking a Reliable Transfer
Whichever of the five airports you are flying from, the details that make the biggest difference to your journey are the same. Look for a service with fixed pricing agreed upfront, drivers who track your flight in case of delays, and availability around the clock rather than limited daytime hours only. These are the things that separate a smooth airport run from a stressful one, particularly on early morning departures when nothing else is open or running yet.
If you are based in Slough, Windsor or anywhere across Berkshire, it is worth checking a provider’s full range of airport transfer options before you book, since some companies only cover one or two of the five airports. A service that runs to Heathrow, Gatwick, Stansted and Luton as standard gives you the flexibility to book the same trusted driver regardless of which airport your next flight happens to use, which takes one more thing off your mind before you travel.
Deciding which London airport suits your trip does not need to be complicated once you know the basics. Heathrow suits most long haul and business travel and is the fastest option from the Berkshire area. Gatwick works well for leisure and charter flights heading south of the city. Stansted and Luton cover the bulk of budget European routes to the north. London City is the outlier, useful only for specific short haul business trips into central London. Once you know which airport you are flying from, the only thing left to sort out is a transfer that gets you there on time, at a price that does not change on the day.
Frequently Asked Questions
Which London airport is closest to Slough?
Heathrow is the closest, roughly 25 minutes away via the M4, making it the fastest option for anyone travelling from Slough, Windsor or Maidenhead.
Is Heathrow or Gatwick easier to get to from Reading?
Heathrow is generally the easier and quicker option from Reading, since it sits closer along the M4 corridor, while Gatwick requires a longer run around the M25.
Which London airport should I choose for a budget European flight?
Stansted and Luton are the two airports most used by budget and low cost carriers running short haul European routes, so check your airline first since most budget tickets depart from one of these two.
Do I need to book an airport taxi in advance?
Yes, booking ahead is recommended, especially for early morning departures or late night arrivals, since it secures your vehicle and locks in a fixed fare before the busiest travel periods.
Is a taxi cheaper than the train to London airports?
It depends on the route and time of day. Train fares vary and can be expensive at peak times, while a taxi with a fixed fare agreed upfront gives you cost certainty regardless of traffic or time.
Which airport is best for short business trips into central London?
London City Airport is the most central and convenient for short haul European business trips, though it is the least practical option from Slough or Berkshire due to distance.
What happens if my flight is delayed and I have a pre-booked taxi?
A good transfer service tracks your flight in real time and adjusts your pickup time automatically at no extra charge, so delays do not affect your booking.
Final Thoughts
Choosing the right London airport does not need to be complicated once you understand what each one offers. Heathrow remains the fastest and most convenient option from Slough and the wider Berkshire area, handling the widest mix of long haul and business routes. Gatwick suits leisure and charter travel heading south, while Stansted and Luton cover most budget European flights to the north. London City stays a niche choice, useful mainly for short business hops into central London.
Once your flight is booked, the only thing left to plan is a transfer that gets you there on time without any last minute stress. A fixed fare taxi with flight tracking removes the uncertainty around traffic, train schedules and early or late departures, so you can focus on the trip itself rather than worrying about how you will get to the terminal.