...in one zone: Edgware Road ←→ Paddington (13½ miles) ...in one zone (outside central London): Wanstead ←→ Woodford (9 miles) ...in one borough: Hampstead ←→ Tottenham Court Road (9 stations)
...above ground: Chesham ←→ Finchley Road (23½ miles) ...underground: Morden ←→ East Finchley (17 miles) ...underwater: North Greenwich ←→ Canning Town (approx 700m)
...within Greater London: Uxbridge ←→ Cockfosters (32 miles) ...south of the river: London Bridge ←→ Morden (9 miles) ...beyond the M25: Chorleywood ←→ Chesham (6 miles)
...through step-free stations only: Green Park ←→ Stratford (12 stations) ...through non-step-free stations only: South Wimbledon ←→ East Finchley (26 stations) ...through interchange stations only: Walthamstow Central ←→ Victoria (12 stations)
...with toilets at every station: Baker Street ←→ Amersham/Chesham (15 stations) ...without toilets at any station: Borough ←→ Morden (14 stations)
...with a non-folding bicycle: Chesham ←→ Aldgate (30 miles)
...through stations with two-word names: East Putney ←→ Sloane Square (9 stations) ...through stations with one-word names: Brixton ←→ Victoria, Stockwell ←→ Embankment, Stratford ←→ Redbridge (5 stations)
...for £1.50: Bethnal Green ←→ Epping (15½ miles, off-peak)
...between Piccadilly line stations: Acton Town ←→ Hammersmith (2.74 miles) ...between Central line stations: Debden ←→ Theydon Bois (2.08 miles) ...between Victoria line stations: Finsbury Park ←→ Seven Sisters (1.83 miles) ...between Jubilee line stations: Kingsbury ←→ Wembley Park (1.77 miles) ...between Northern line stations: Totteridge & Whetstone ←→ High Barnet (1.59 miles) ...between District line stations: Dagenham East ←→ Elm Park (1.40 miles) ...between Hammersmith & City line stations: East Ham ←→ Barking (1.36 miles) ...between Circle line stations: King's Cross St Pancras ←→ Farringdon (1.15 miles) ...between Bakerloo line stations: Kenton ←→ Harrow & Wealdstone (1.08 miles)
...150 years ago: Moorgate ←→ Hammersmith (8 miles) ...100 years ago: Verney Junction ←→ Baker Street (49 miles)
...through stations all starting with the same letter: Hounslow East → Hounslow Central → Hounslow West → Hatton Cross → Heathrow Terminal 4 → Heathrow Terminals 2&3 → Hatton Cross → Hounslow West → Hounslow Central → Hounslow East (10 stations) ...but if we allow that then the longest tube journey is: Cockfosters → Heathrow Terminal 4 → Cockfosters (60 miles)