Heathrow and Uxbridge sit at opposite ends of two different Piccadilly line branches, so despite both being served by the same tube line, there's no single train that runs between them without changing. The quickest way to bridge the roughly 7-mile gap is a direct Carousel bus in about 15 minutes, or a taxi in a similar time for around £20 to £35. Checked 2026.
Why isn't there a direct tube from Heathrow to Uxbridge?
It's one of the most common points of confusion for anyone looking at a London Underground map: Heathrow and Uxbridge are both served by the Piccadilly line, so it looks like they should connect directly. They don't. The Piccadilly line splits into two separate western branches at Acton Town, one running to Heathrow's terminals and the other running north to Uxbridge, with a flying junction that has kept the two branches physically separate since 1910, according to the line's own engineering history.
That means a Heathrow-bound Piccadilly train and an Uxbridge-bound Piccadilly train are running on different tracks for almost the entire route. To travel between the two by Underground, you'd need to take a Heathrow train to Acton Town, cross the platform, and pick up an Uxbridge-branch train (or vice versa), plus any onward change if your specific train terminates short of Uxbridge. It's a legitimate route, but it typically takes close to an hour once you add up the two legs and the change, which is why it's rarely the way people actually make this trip.
The Metropolitan line alternative
Uxbridge is also served by the Metropolitan line, which doesn't reach Heathrow at all, so switching lines partway through your journey doesn't shortcut the Acton Town change. Whichever combination of Piccadilly and Metropolitan services you pick, you're still looking at least one interchange to get across from the Heathrow branch.
Is there a direct bus from Heathrow to Uxbridge?
Yes, and for most travellers this is the more sensible option. Local bus services run by Carousel Buses connect Heathrow Central Bus Station directly to Uxbridge, with buses roughly every 20 minutes and a typical journey time of around 15 minutes, according to independent route data. That's dramatically faster than the tube-with-a-change, mainly because the bus runs a fairly direct road route rather than looping via Acton Town.
Fares work on London's standard bus pricing: £1.75 per journey on pay as you go with a contactless card or Oyster, and Transport for London's Hopper fare means a same-hour connecting bus doesn't cost extra. For light luggage and a straightforward point-to-point trip, this bus is usually both the cheapest and quickest public transport option.
Taxi: cost and journey time
By road, Heathrow to Uxbridge is about 7 miles, mostly via the A408 or A4020, and normally takes 15 to 25 minutes depending on traffic on the approach roads into Uxbridge town centre. Minicab operators quoting this specific route commonly advertise fares from around £20, with typical fixed-price quotes in the £20 to £35 range for a standard saloon; confirm the exact price with your chosen operator, since it varies by vehicle size, time of day and whether you book in advance. This puts it in a similar bracket to the short hop to Slough, another close-by destination without a direct rail link.
A taxi is worth the extra cost over the bus if you have heavy luggage, are travelling with a group, or need to reach an address away from central Uxbridge that the bus doesn't serve directly.
Comparing your options
| Option | Cost | Time | Best for |
|---|---|---|---|
| Direct Carousel bus | £1.75 (Hopper fare applies) | ~15 min | Cheapest and simplest, light luggage |
| Taxi | ~£20 to £35 | 15 to 25 min | Door-to-door, luggage, groups |
| Piccadilly line via Acton Town | Standard tube fare, one change | Close to an hour | Only if already on the Underground network |
Business travellers and Brunel University
Uxbridge is home to Brunel University London and is also a base for several corporate offices along the Uxbridge Road corridor, so this is a genuinely common business trip, not just a leisure one. For a same-day meeting or a conference visit, the direct bus is usually the most predictable option since it avoids depending on a tight tube interchange at Acton Town during peak hours, when both branches can be busy.
Which to choose
For most trips, the direct Carousel bus is the best value: it's cheap, reasonably frequent and meaningfully faster than trying to force a Piccadilly line connection that was never designed for this journey. A taxi is the better choice with luggage, a very early or late arrival, or a destination beyond easy walking distance from the town centre. The one case for using the Underground is if you're already travelling on the Piccadilly or Metropolitan line for another leg of your journey and the change at Acton Town happens to be convenient.
For the full picture of Heathrow's rail and Tube network, see the public transport page, and for fixed-price taxi options, see the taxis page. If you're transferring between Heathrow's own terminals rather than heading out to Uxbridge, see how to transfer between Heathrow's terminals.