| Number | Service (From/To) | General Details | Operator | | 81 | Slough to Hounslow | Only this direction, Mon to Fri (78 trips) Sat (every 12 mins) Sun (every 15 mins) | Metroline |
| Via Slough-Langley-Brands Hill-Colnbrook-Longford-Heathrow Airport (Thistle Hotel) ..... more |
| 111 | Heathrow Airport to Kingston Upon Thames | Sat (every 9 mins) Sun (every 12 mins) | London United |
| Via Sipson-Harlington-Heathrow Airport Renaissance Hotel ..... more |
| | Heathrow Airport to Kingston Upon Thames | School terms only, (every 8 mins) | " |
| Via Sipson-Harlington-Heathrow Airport Renaissance Hotel ..... more |
| 278 | Heathrow Airport to Ruislip | Mon to Fri (72 trips, 73 back) Sat (every 13 mins) Sun (every 20 mins) | Abellio London |
| Via Sipson-Harlington-Heathrow Airport Renaissance Hotel ..... more |
| 285 | Heathrow Airport to Kingston Upon Thames | Only this direction, Sat (every 12 mins) Sun (every 12 mins) | " |
| Via Sipson-Harlington-Heathrow Airport Renaissance Hotel ..... more |
| | Heathrow Airport to Kingston Upon Thames | School service, one way and Afternoon only, (?) | " |
| Via Sipson-Harlington-Heathrow Airport Renaissance Hotel ..... more |
| 423 | Heathrow Airport (Terminal 5) to Hounslow | Only this direction, Mon to Fri (58 trips) Sat (every 19 mins) Sun (every 30 mins) | London United |
| Via Longford-Heathrow Airport (Thistle Hotel)-Harmondsworth ..... more |
| 555 | Heathrow Airport to Hersham | Early Mornings, this way only, Sat (1 trip) Sun (1 trip) | Hallmark Connections |
| Via Sipson-Harlington (Heathrow Airport Renaissance Hotel) ..... more |
| | Heathrow Airport to Sunbury | Evenings only, one way, Mon to Sun (2 trips) | " |
| Via Sipson-Harlington (Heathrow Airport Renaissance Hotel) ..... more |
| | Heathrow Airport to Walton on Thames | Only this direction, Mon to Sun (4 trips) | " |
| Via Sipson-Harlington (Heathrow Airport Renaissance Hotel) ..... more |
| | Heathrow Airport to Whiteley | Only this direction, Mon to Fri (14 trips) Sat (every 60 mins) Sun (every 60 mins) | " |
| Via Sipson-Harlington (Heathrow Airport Renaissance Hotel) ..... more |
| H54 | Sipson (Heathrow Airport Holiday Inn M4) to Heathrow Airport (Terminal 5) | Mon to Sun (every 30 mins) | " |
| Via Harlington (Heathrow Airport Renaissance Hotel)-Harlington (Heathrow Airport Sheraton Skyline Hotel) ..... more |
| N 9 | Heathrow Airport (Terminal 5) to Aldwych | Evenings only, one way, Mon to Sun (16 trips) | London United |
| Via Heathrow Airport (Central Bus Station)-Sipson-Harlington ..... more |
| N140 | Heathrow Airport to Harrow Weald (Long Elmes) | Early Mornings, this way only, Mon to Sun (13 trips) | Metroline |
| Via Sipson-Harlington-Heathrow Airport Renaissance Hotel ..... more |