100X bus timetable
Looking for the 100X bus? 2 different bus routes are numbered 100X across the UK and Ireland, run by 2 operators in 2 areas. They are separate services that happen to share a number — pick yours below for its timetable, stops, live map and fares.
A letter on the end usually marks a variant of the plain-numbered route — a different terminus or a peak-hour extension — and what it stands for is up to the operator. What bus route numbers mean
100X bus in South East England
1 route
- 100X Aylesbury — Aylesbury to Milton Keynes via Bletchley, Eaglestone Z & S Transport 4 weekday journeys first 06:30 · last 16:40
100X bus in Ireland
1 route
- 100X Dublin — Dublin to Dundalk via Swords, Drogheda Bus Éireann 38 weekday journeys first 03:30 · last 23:43
Frequently asked questions
Where does the 100X bus run?
2 buses are numbered 100X, in Dublin & Aylesbury. Each one is listed above by area, with its timetable, stops and live map.
Why are there so many different 100X buses?
Route numbers in the UK are chosen locally — by the operator, or by the local transport authority that tenders the service — not from any national list. Nothing stops two towns hundreds of miles apart both running a 100X, and 2 of them do. The 100X in Dublin has no connection to the 100X in Aylesbury: different operator, different road, different timetable.
How do I find the right 100X bus timetable?
Find your part of the country in the list above and open the 100X that starts or finishes near you — each one links to its full timetable, every stop, a live map and its fares. If you know the stop you'll be waiting at, searching for the stop name instead gives you the next departures from that exact stop, which is more reliable than any timetable.
Is the 100X bus the same route in every town?
No. These are 2 unrelated services that happen to share a number, run by 2 different operators. Fares, timetables and accessibility differ on each one, so always open the specific 100X for your area.
What does the “100X” in the bus number mean?
A letter on the end usually marks a variant of the plain-numbered route — a different terminus or a peak-hour extension — and what it stands for is up to the operator. It is a convention operators choose to follow rather than a national rule, so check the specific 100X for your area in the list above. See our guide to what UK bus route numbers mean for the letters that are reliable and the ones that are not.
Looking for the next bus rather than a timetable? Stops near you shows live departures. Browse all bus routes, every operator or timetables by town. Data from operators via the DfT Bus Open Data Service — see all sources.