Gerrards Cross to Heathrow Taxi

Local Knowledge

Leaving Gerrards Cross: Denham, the M25 and which terminal you need

Nearly every Heathrow job from the town starts on the A40 Oxford Road, heading east past Tatling End, where the A413 Amersham Road comes in, to the Denham Roundabout and Junction 1 of the M40. Junction 1A is half a mile further and drops the car onto the anticlockwise M25 at Junction 16. What happens next depends only on your terminal.

Terminals 2 and 3

We leave the M25 at Junction 15, run east on the M4 to Junction 4 and take the airport spur, which crosses the A4 Bath Road and dives into the tunnel under the northern runway. Both terminals share that central area at the far end.

Terminals 4 and 5

Neither is reached through the tunnel. We stay on the M25 down to Junction 14: Terminal 5 has its own approach off the A3044 on the airport's western edge, and Terminal 4 is signed along the A3113 and the Southern Perimeter Road. Because the approaches really are separate roads, a wrong call at Junction 15 turns a short trip into a slow circuit of the airport, which is why the terminal goes on the booking.

When the A40 is backed up at Denham, the driver goes south instead on the A412 through Iver Heath and Langley and reaches the A4 Bath Road, which runs along the north side of the airport to the same tunnel.

What time to leave Gerrards Cross

For a short-haul departure most people like to be at the terminal about two hours before take-off, and three for long haul. From SL9 that means a 06:30 flight to Europe wants a car at roughly 04:00, which is also when the roads are at their emptiest. A weekday 09:00 long-haul flight is the awkward one: you are driving into the M25 rush, so we would plan a 05:15 pickup rather than cut it to the 20-minute best case. Our guide to leaving South Bucks for the airport works through other flight times.

Drop-off charge, or the free Park & Ride

Heathrow charges £7 each time a vehicle enters a terminal drop-off zone, with no waiting allowed, and a driver who forgets to pay by midnight the next day is sent an £80 parking charge. On our fare that charge is already covered. If you would rather skip the forecourt, the Park & Ride car park for your terminal allows free drop-off and runs a free shuttle bus to the doors, and we can drop you there instead. Every UK airport's 2026 drop-off rules are compared in our blog.

Who we drive

The bookings reflect the town. Plenty come from people who already commute out of Station Approach on the Chiltern line and want the airport leg run as smoothly. School holidays bring the rest: St Mary's on Packhorse Road, Thorpe House on Oval Way, Maltman's Green on Maltmans Lane and the Gerrards Cross CofE School on Bull Lane all break up within days of each other, and the early departure slots on that first morning fill quickly. We pick up in Austenwood, Latchmoor, Chalfont Heights and around the Common, at the Chalfont Park offices, and at the Ethorpe on Packhorse Road for hotel guests. Anyone flying every few weeks usually switches to a monthly account, and if the trip involves golf clubs, skis or a pushchair we choose a car from the fleet with the boot to match.