7series 78 and X78

78:
HEATHROW TERMINAL 6
Compass Centre
Waterside
HEATHROW NORTH GARAGE Bus Station
Colnbrook Axis Park
Langley Tamar Way
Langley Common Road
Langley Trelawney Avenue
London Road Sainsbury's
Slough Bus Station
Bath Road Three Tuns
Everitts Corner
Lent Rise Sainsbury's
Taplow Station
Maidenhead Bridge
Lower Cookham Road
Cookham High Street
Riversdale
BOURNE END STATION

X78 Express:
HEATHROW TERMINAL 4
Hatton Cross Bus Station
Heathrow Terminal 6
HEATHROW NORTH GARAGE Bus Station
Slough Bus Station
Bath Road Three Tuns
Everitts Corner
Lent Rise Sainsbury's
Taplow Station
Maidenhead Bridge
Cookham High Street
Bourne End Station
Wooburn Town
Wooburn Green
Loudwater
Wycombe Marsh
High Wycombe Eden Bus Station
HIGH WYCOMBE Station

78 Frequency:
Monday-Saturday every 15 minutes, Sunday every 30 minutes

First Bus:
Heathrow-Bourne End: 0425 (Mon-Sat), 0525 (Sun)
Bourne End-Heathrow: 0300 (daily)
​
Last Bus:
Heathrow-Bourne End: 2330 (daily)
Bourne End-Heathrow: 0030 (daily)

X78 Frequency:
Monday-Saturday every 30 minutes, Sunday every hour.

First Bus:
Heathrow-Wycombe: 0600 (daily)
Wycombe-Heathrow: 0710 (daily)

Last Bus:
Heathrow-Wycombe: 2200 (daily)
Wycombe-Heathrow: 2310 (daily)

FROM 1st SEPTEMBER 2018:
Night 78 service will be withdrawn. Use route N74 between Heathrow and Slough.