It is known as the M25 or the London Orbital and is 117 miles long
The M25 is Approximately 118 Miles long.
60 miles taking this route:Go to M25 via A13; once you are at M25, follow signs to M25 STANSTED AIRPORT (to M11).Take M25 around to M11 CAMBRIDGE at J27.Take M11 up to Cambridge.
The M25 encircles almost all of greater London. It's 117 miles long. At an average 60 mph, it will take about 2 hours.
25 miles taking this route:Follow A3 towards LONDON from Guildford to M25. Once you are at M25, follow signs to M25 (W) to HEATHROW.Take M25 around London on the LONDON ORBITAL to HEATHROW. FOLLOW SIGNS to your TERMINAL.
94 miles taking this route:EXIT the airport, and follow signs to M11. Follow signs to M11(S) LONDON (to M25).Take M11 to M25 at J6; follow signs to M25 WATFORD.Take M25, around London, to M40 to OXFORD at J16.Take M40 to A40 to OXFORD at J8.Take A40 to Oxford.
85 miles taking this route:Follow signs out of the airport to M25; once you get to M25, follow signs to M25 HEATHROW (to M3).Once you are on M25, take M25, around London, to M3 to SOUTHAMPTON at J12.Take M3 to Southampton.
Take A127 LONDON (to M25), from Basildon, to M25 (WEST) towards STANSTED (to M1).Take M25 (London Orbital), around London, to M1 to The NORTH to LUTON at J21.Take M1 up to A1 to The NORTH towards WETHERBY.Take A1 to CATTERICK.
85 miles:Take M1(S) LONDON, from Northampton, to M25 towards STANSTED AIRPORT and DARTMOUTH @ J6A.Take M25 around London to Thurrock.
About 2 hours and if you take the M25 it may take about 4 to 5 hours
35 miles taking this route:EXIT the airport, and then follow signs to M25. Once you are at M25, follow signs to M25 (N) to WATFORD (to M1).Take M25 around to M1 to the NORTH to LUTON AIRPORT at J21.Take M1 to the NORTH to A1081 to LUTON AIRPORT at J10.Follow A1081 to LUTON AIRPORT.
95 miles taking this route:Take A2 LONDON (to M25), from Gravesend, to M25(N) (to M1) via A282 through DARTFORD CROSSING. Follow signs to M25(N).Take M25, around LONDON, to M1 to The NORTH to LUTON AIRPORT at J21.Take M1 to The NORTH to NORTHAMPTON.