Meine-Deutsche-Bahn.de: Haltestelle Spich Kreissparkasse - Linie Bus 503 (Siegburg Bahnhof). DB Fahrplan an der Haltestelle in Troisdorf Spich Kreissparkasse.
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| 7 | 03 | 23 | 43 |
| 8 | 03 | 23 | 43 |
| 9 | 03 | 23 | |
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| 17 | 23 | 43 | |
| 18 | 03 | 23 | 43 |
| 19 | 03 | 23 | |