Vienna U-Bahn U-Bahn network U-Bahn network

| Line | Colour | Route | Length_ | Stations |
|---|---|---|---|---|
| U 1 | red | Reumannplatz – Leopoldau | 14.6km (9.1mi) | 19 |
| U 2 | purple | Karlsplatz – Seestadt | 16.7km (10.4mi) | 20 |
| U 3 | orange | Ottakring – Simmering | 13.5km (8.4mi) | 21 |
| U 4 | green | Hütteldorf – Heiligenstadt | 16.5km (10.3mi) | 20 |
| U 6 | brown | Siebenhirten – Floridsdorf | 17.4km (10.8mi) | 24 |