Operator: Heathrow Express
Calling Points:
| 09:27 | Heathrow Airport T123 | On time |
| 09:33 | Heathrow Airport T5 | On time |
| 09:27 | Heathrow Airport T123 | On time |
| 09:33 | Heathrow Airport T5 | On time |
| 09:18 | Bond Street | On time |
| 09:20 | Tottenham Court Road | On time |
| 09:23 | Farringdon | On time |
| 09:26 | London Liverpool Street | On time |
| 09:28 | Whitechapel | On time |
| 09:32 | Canary Wharf (Elizabeth line) | On time |
| 09:36 | Custom House | On time |
| 09:41 | Woolwich (Elizabeth line) | On time |
| 09:46 | Abbey Wood | On time |
| 09:26 | Ealing Broadway | On time |
| 09:31 | Southall | On time |
| 09:34 | Hayes & Harlington | On time |
| 09:38 | West Drayton | On time |
| 09:40 | Iver | On time |
| 09:43 | Langley | On time |
| 09:46 | Slough | On time |
| 09:50 | Burnham | On time |
| 09:53 | Taplow | On time |
| 09:56 | Maidenhead | On time |
| 10:03 | Twyford | On time |
| 10:10 | Reading | On time |
| 09:25 | Bond Street | On time |
| 09:27 | Tottenham Court Road | On time |
| 09:30 | Farringdon | On time |
| 09:32 | London Liverpool Street | On time |
| 09:35 | Whitechapel | On time |
| 09:40 | Stratford (London) | On time |
| 09:33 | Acton Main Line | On time |
| 09:36 | Ealing Broadway | On time |
| 09:39 | West Ealing | On time |
| 09:41 | Hanwell | On time |
| 09:44 | Southall | On time |
| 09:47 | Hayes & Harlington | On time |
| 09:54 | Heathrow Airport T123 | On time |
| 10:00 | Heathrow Airport T4 | On time |
| 09:41 | Heathrow Airport T123 | On time |
| 09:48 | Heathrow Airport T5 | On time |
| 09:30 | Bond Street | On time |
| 09:32 | Tottenham Court Road | On time |
| 09:35 | Farringdon | On time |
| 09:38 | London Liverpool Street | On time |
| 09:40 | Whitechapel | On time |
| 09:44 | Canary Wharf (Elizabeth line) | On time |
| 09:48 | Custom House | On time |
| 09:52 | Woolwich (Elizabeth line) | On time |
| 09:57 | Abbey Wood | On time |
| 09:55 | Reading | On time |
| 10:09 | Didcot Parkway | On time |
| 10:25 | Swindon | On time |
| 10:54 | Bristol Parkway | On time |
| 11:13 | Newport (South Wales) | On time |
| 11:27 | Cardiff Central | On time |
| 11:49 | Bridgend | On time |
| 12:01 | Port Talbot Parkway | On time |
| 12:09 | Neath | On time |
| 12:21 | Swansea | On time |
| 12:48 | Llanelli | On time |
| 12:55 | Pembrey & Burry Port | On time |
| 13:17 | Carmarthen | On time |
| 09:35 | Bond Street | On time |
| 09:37 | Tottenham Court Road | On time |
| 09:40 | Farringdon | On time |
| 09:42 | London Liverpool Street | On time |
| 09:45 | Whitechapel | On time |
| 09:49 | Canary Wharf (Elizabeth line) | On time |
| 09:53 | Custom House | On time |
| 09:57 | Woolwich (Elizabeth line) | On time |
| 10:03 | Abbey Wood | On time |
| 09:40 | Ealing Broadway | On time |
| 09:43 | West Ealing | On time |
| 09:47 | Southall | On time |
| 09:50 | Hayes & Harlington | On time |
| 10:01 | Heathrow Airport T123 | On time |
| 10:07 | Heathrow Airport T5 | On time |