| | | | | | | | | | | | | station | interchange | structure | opened |
| 1 | | | | 7 | | | 13 | | | | | Aachener Straße/ Gürtel * | | at-grade | |
| 3 | 4 | | | | | | | | | | Akazienweg * | | underground | 1992 |
| | | | | | | | | | | 18 | Alfter/Alanus Hochschule | | at-grade | |
| | | 5 | | | | | | | | | Alter Flughafen Butzweilerhof | | at-grade | |
| 1 | | | | | | | | | | | | Alter Militärring | | at-grade | |
| | | | | | | | 15 | | | | Altonaer Platz | | at-grade | |
| | | 5 | | | | | | | | | Am Butzweilerhof † | | at-grade | 2010 |
| | 4 | | | | | | | | | | Am Emberg | | at-grade | |
| | | | | | | 13 | | 16 | | | Amsterdamer Straße/Gürtel * | | elevated, at-grade | 1974 |
| 3 | 4 | 5 | | | | | | 16 | | 18 | Appellhofplatz * | | underground | 1968 |
| | | | | | | | | | | 18 | Arnulfstraße | | at-grade | |
| | | | | 9 | | | | | | | Autobahn | | at-grade | |
| | | | | | | | | 16 | | | Bad Godesberg Bf * | | underground | |
| | | | | | | | | 16 | | | Bad Godesberg Stadthalle † | | underground | |
| 1 | | | | | | | | | | | | Bahnstraße | | at-grade | |
| | | | | | 12 | | 15 | 16 | | 18 | Barbarossaplatz * | | at-grade | |
| | | | 7 | | | | | | | | Baumschulenweg | | at-grade | |
| | | | | | | | | 16 | 17 | | Bayenthalgürtel * | | at-grade | |
| 1 | | | | | | | | | | | | Bensberg † | | underground | 2000 |
| | | | | | | 13 | | | | | Berrenrather Straße/Gürtel | | at-grade | |
| 1 | 3 | 4 | | | 9 | | | | | | | Bf Deutz/Messe * Bf Deutz/Lanxess Arena * |
| underground, at-grade | |
| | | | | | | 13 | | | | 18 | Bf Mülheim * | | underground | 1997 |
| 3 | 4 | | | | | | | | | | Bocklemünd † | | at-grade | |
| | | | | | | | | | | 18 | Boltensternstraße | | at-grade | 1974 |
| | | | | | | | | | 17 | | Bonner Wall | | underground | |
| | | | | | | | | 16 | | 18 | Bonn Hbf ** | | underground | |
| | | | | | | | | 16 | | 18 | Bonn West * | | at-grade | |
| | | | | | | | | | | 18 | Bornheim | | at-grade | |
| | | | | | | | | | | 18 | Bornheim Rathaus | | at-grade | |
| | | | 7 | | | | | | | | Brahmsstraße | | at-grade | |
| | | | | | | | | 16 | | 18 | Breslauer Platz/Hauptbahnhof * | | underground | 1974 |
| 1 | | | | | | | | | | | | Brück Mauspfad | | at-grade | |
| | | | | | | | | | | 18 | Brühler Straße | | at-grade | |
| | | | | | | | | | | 18 | Brühl-Vochem | | at-grade | |
| | | | | | | | | | | 18 | Brühl Nord | | at-grade | |
| | | | | | | | | | | 18 | Brühl Mitte | | at-grade | |
| | | | | | | | | | | 18 | Brühl Süd | | at-grade | |
| | | | | | | | | | | 18 | Brühl-Badorf | | at-grade | |
| | | | | | | | | | | 18 | Brühl-Schwadorf | | at-grade | |
| 3 | | | | | | | | | | | Buchforst Waldecker Straße | | at-grade | |
| 3 | | | | | | | | | | | Buchheim Frankfurter Straße | | at-grade | |
| 3 | | | | | | 13 | | | | 18 | Buchheim Herler Straße * | | at-grade | |
| | | | | | | | | 16 | | | Bundesrechnungshof/Auswärtiges Amt * | | underground | |
| | | | | | | | | 16 | | | Buschdorf | | at-grade | |
| | | | | | | | 15 | 16 | 17 | | Chlodwigplatz * | | underground, at-grade | 2015 |
| | | | | | | | 15 | | | | Chorweiler † | | underground | 1973 |
| | | | | | 12 | | 15 | | | | Christophstraße/ Mediapark * | | underground | 1987 |
| 1 | | | | | | | | | | | | Clarenbachstift | | at-grade | |
| | | | | 9 | | | | | | | Dasselstraße/Bf Süd | | at-grade | |
| 3 | | | | | | | | | | 18 | Dellbrück Hauptstraße * | | at-grade | |
| 3 | | | | | | | | | | 18 | Dellbrück Mauspfad * | | at-grade | |
| | | | | | | | | | | 18 | Dersdorf | | at-grade | |
| 1 | | | | 7 | 9 | | | | | | | Deutzer Freiheit * | | at-grade | |
| 1 | | | | | 9 | | | | | | | Deutz Technische Hochschule * | | underground | |
| | | 5 | | | | | | 16 | | 18 | Dom/Hauptbahnhof * | | underground | 1974 |
| | | | | | | | | | | 18 | Dransdorf | | at-grade | |
| | | | 7 | | | | | | | | Drehbrücke | | at-grade | |
| | | | 7 | | | 13 | | | | | Dürener Straße/Gürtel * | | at-grade | |
| | | | | | 12 | | 15 | 16 | | 18 | Ebertplatz * | | underground | 1974 |
| | | | | | | | | | | 18 | Efferen | | at-grade | |
| | | | | | 12 | | | | | | Eifelplatz | | at-grade | |
| | | | | | 12 | | 15 | 16 | | | Eifelstraße * | | at-grade | |
| | | | | | | | | | | 18 | Eifelwall/Stadtarchiv | | at-grade | |
| | | | 7 | | | | | | | | Ensen Gilgaustraße | | at-grade | |
| | | | 7 | | | | | | | | Ensen Kloster | | at-grade | |
| | | | | | | 13 | | | | | Escher Straße | | elevated | |
| 1 | | | | | | | | | | | | Eupener Straße | | at-grade | |
| | | | | | | 13 | | | | | Euskirchener Straße | | at-grade | |
| | | | | | | | | | | 18 | Fischenich | | at-grade | |
| 1 | | | | | | | | | | | | Flehbachstraße | | at-grade | |
| | | | | | 12 | | 15 | | | | Florastraße * | | underground | 1974 |
| | | | | | 12 | | | | | | Fordwerke Nord | | at-grade | |
| | | | | | 12 | | | | | | Fordwerke Mitte | | at-grade | |
| | | | | | 12 | | | | | | Fordwerke Süd | | at-grade | |
| 1 | | | | | | | | | | | | Frankenforst | | at-grade | |
| | | | 7 | | | | | | | | Frechen-Benzelrath † | | at-grade | |
| | | | 7 | | | | | | | | Frechen Bf | | at-grade | |
| | | | 7 | | | | | | | | Frechen Kirche | | at-grade | |
| | | | 7 | | | | | | | | Frechen Rathaus | | at-grade | |
| 3 | 4 | 5 | | | 12 | | 15 | | | | Friesenplatz * | | underground | 1987 |
| 1 | | | | | | | | | | | | Fuldaer Straße | | underground | |
| | | | | | 12 | | | | | | Geestemünder Straße | | at-grade | |
| | | | | | | 13 | | | | | Geldernstraße/ Parkgürtel * | | underground | |
| | | | | | | 13 | | | | | Gleueler Straße/Gürtel | | at-grade | |
| | | | | | | | | 16 | | | Godorf | | at-grade | |
| 3 | | | | | | | | | | | Görlinger-Zentrum † | | at-grade | 2018 |
| | | | | | 12 | | | | | | Gottesweg | | at-grade | |
| | 4 | | | | | | | | | | Grünstraße | | at-grade | |
| | | 5 | | | | | | | | | Gutenbergstraße | | at-grade | |
| 3 | 4 | 5 | | | | | | | | | Hans-Böckler Platz/Bf West * | | underground | 1987 |
| | | | | | 12 | | 15 | | | | Hansaring * | | underground | 1974 |
| | | | 7 | | | | | | | | Haus Vorst | | at-grade | |
| | | | | | | | 15 | | | | Heimersdorf | | underground | 1971 |
| | | | | | | | | 16 | 17 | | Heinrich-Lübke-Ufer * | | at-grade | |
| | | | | | | | 15 | | | | Herforder Straße | | at-grade | |
| | | | | | | | | 16 | | | Hersel | | at-grade | |
| | | | | | 12 | | | | | | Herthastraße | | at-grade | |
| 1 | | | 5 | 7 | 9 | | | | | | | Heumarkt ** | | underground, at-grade | |
| | | | | | | | | 16 | | | Heussallee | | underground | |
| | | | | | | | | 16 | | | Hochkreuz | | at-grade | |
| 1 | | | | | | | | | | | | Höhenberg Frankfurter Straße | | at-grade | |
| 3 | | | | | | 13 | | | | 18 | Holweide Vischeringstraße ** | | at-grade | |
| | | | | | | | | | | 18 | Hürth-Hermülheim | | at-grade | |
| | | 5 | | | | | | | | | IKEA Am Butzweilerhof | | at-grade | |
| | | 5 | | | | | | | | | Iltisstraße | | at-grade | |
| 1 | | | | | | | | | | | | Im Hoppenkamp | | at-grade | |
| | 4 | | | | | | | | | | Im Weidenbruch | | at-grade | |
| 1 | | | | | | | | | | | | Junkersdorf | | at-grade | |
| | | | | | | | | 16 | | | Juridicum | | underground | |
| 1 | | | | | | | | | | | | Kalker Friedhof | | at-grade | |
| 1 | | | | | 9 | | | | | | | Kalk Kapelle * | | underground | |
| 1 | | | | | 9 | | | | | | | Kalk Post * | | underground | |
| | | | | | | | | | 17 | | Kartäuserhof | | underground | |
| | 4 | | | | | | | | | | Keupstraße | | at-grade | |
| | | | | | | | | | | 18 | Kiebitzweg | | at-grade | |
| | | | | | | | | 16 | | | Kinderkrankenhaus | | at-grade | |
| 1 | | | | | | | | | | | | Kippekausen | | at-grade | |
| | | | | | | | | | | 18 | Klettenbergpark | | at-grade | |
| 3 | 4 | | | | | | | | | | Koelnmesse * | | at-grade | |
| 1 | | | | | | | | | | | | Kölner Straße | | at-grade | |
| | | | | 9 | | | | | | | Königsforst † | | at-grade | 1904 |
| 3 | 4 | | | | | | | | | | Körnerstraße * | | underground | 1989 |
| | | 5 | | | | | | | | | Lenauplatz | | at-grade | |
| | 4 | | | | | | | | | | Leuchterstraße | | at-grade | |
| 3 | 4 | | | | | | | | | | Leyendeckerstraße * | | underground | 1992 |
| | | 5 | | | | | | | | | Liebigstraße | | at-grade | |
| | | | | 9 | | | | | | | Lindenburg | | at-grade | |
| | | | | | 12 | | 15 | | | | Lohsestraße * | | underground | 1987 |
| | | | | | | | 15 | | | | Longericher Straße | | at-grade | |
| | | | | | | | 15 | | | | Longerich Friedhof | | at-grade | |
| 1 | | | | | | | | | | | | Lustheide | | at-grade | |
| 1 | | | | | | | | | | | | Maarweg | | at-grade | |
| | | 5 | | | | | | | | | Margaretastraße | | at-grade | |
| 3 | | | | | | | | | | 18 | Maria-Himmelfahrt-Straße * | | at-grade | |
| | | | 7 | | | | | | | | Marsdorf | | at-grade | |
| | | | | 9 | | | | | | | Mauritiuskirche | | at-grade | |
| | | | | | | | | 16 | | | Max-Löbner-Straße | | at-grade | |
| | | | | | | | 15 | | | | Meerfeldstraße | | at-grade | |
| 1 | | | | 7 | | | | | | | | Melaten * | | at-grade | |
| | | | | | | 13 | | | | | Melatengürtel * | | at-grade | |
| 1 | | | | | | | | | | | | Merheim | | at-grade | |
| | | | | | 12 | | | | | | Merkenich † | | at-grade | |
| | | | | | 12 | | | | | | Merkenich Mitte | | at-grade | |
| | | | | | | | | | | 18 | Merten | | at-grade | |
| | | | | | | | | 16 | 17 | | Michaelshoven * | | at-grade | |
| 1 | | | | | | | | | | | | Mohnweg | | at-grade | |
| | | | | | 12 | | 15 | | | | Mollwitzstraße * | | at-grade | |
| 1 | | | | 7 | | | | | | | | Moltkestraße * | | at-grade | |
| | | | | 9 | | | | | | | Mommsenstraße | | at-grade | |
| | | | 7 | | | | | | | | Mühlengasse | | at-grade | |
| | 4 | | | | | | | | | | Mühlheim Berliner Straße | | at-grade | |
| | | | | | | | | 16 | | | Museum Koenig | | underground | |
| | | | | | | | | 16 | | | Nesselrodestraße | | at-grade | |
| 1 | | | | | | | | | | | | Neuenweg | | at-grade | |
| 3 | | | | | | | | | | 18 | Neufelder Straße * | | at-grade | |
| 1 | 3 | 4 | | 7 | 9 | | | | 16 | | 18 | Neumarkt * | | underground, at-grade | |
| | | | | | 12 | 13 | 15 | | | | Neusser Straße/Gürtel* | | underground, elevated | 1974 |
| | | | | | 12 | | | | | | Niehl Nord | | at-grade | |
| | | | | | | | | 16 | | | Niehl Sebastianstraße † | | at-grade | 1992 |
| | | 5 | | | | 13 | | | | | Nußbaumerstraße * | | at-grade | |
| | 4 | | | | | | | | | | Odenthaler Straße | | at-grade | |
| 3 | | | | | | | | | | | Ollenhauerring | | at-grade | |
| | | | | | | | | 16 | | | Ollenhauerstraße | | at-grade | |
| | | | | | | | | 16 | | | Olof-Palme-Allee | | at-grade | |
| | | | | 9 | | | | | | | Ostheim | | at-grade | |
| 3 | 4 | | | | | | | | | | Piusstraße * | | underground | 1989 |
| | | | | | | | | 16 | | | Plittersdorfer Straße | | underground | |
| | | | | | 12 | | | | | | Pohligstraße | | at-grade | |
| | | | 7 | | | | | | | | Poller Kirchweg | | at-grade | |
| | | | 7 | | | | | | | | Poll Salmstraße | | at-grade | |
| | | | 7 | | | | | | | | Porz Markt | | at-grade | |
| | | | 7 | | | | | | | | Porz Steinstraße | | at-grade | |
| | | | | 9 | | | | | | | Porzer Straße | | at-grade | |
| 3 | 4 | | | | | | | 16 | | 18 | Poststraße * | | underground | |
| | | | | | | | | 16 | | | Propsthof Nord | | at-grade | |
| | | | 7 | | | | | | | | Raffeisenstraße | | at-grade | |
| | | 5 | | | | | | | | | Rathaus | | underground | |
| | | | | 9 | | | | | | | Rath/Heumar | | at-grade | |
| 1 | | | | | | | | | | | | Refrath | | at-grade | |
| | | | | | | | | 16 | | 18 | Reichenspergerplatz * | | underground | |
| | | 5 | | | | | | | | | Rektor-Klein-Straße | | at-grade | |
| 1 | | | | | | | | | | | | RheinEnergie Stadion | | at-grade | |
| | | | | 9 | | | | | | | Röttgensweg | | at-grade | |
| | | | | | | | | | | 18 | Robert-Kirchhoff-Straße | | at-grade | |
| 3 | 4 | | | | | | | | | | Rochusplatz * | | underground | 1992 |
| | | | | | | | | 16 | 17 | | Rodenkirchen Bf * | | at-grade | |
| | | | | | | | | | | 18 | Roisdorf West | | at-grade | |
| | | | 7 | | | | | | | | Rosenhügel | | at-grade | |
| 1 | | | | 7 | | 12 | | 15 | | | | Rudolfplatz * | | underground, at-grade | 1987 |
| 3 | | | | | | | | | | | Schaffrathsgasse | | at-grade | |
| | | | | | 12 | | 15 | | | | Scheibenstraße * | | at-grade | |
| | 4 | | | | | | | | | | Schlebusch † | | at-grade | |
| | | | | | | | | 16 | 17 | | Schönhauser Straße * | | at-grade | |
| | | | 7 | | | | | | | | Severinsbrücke | | at-grade | |
| 3 | 4 | | | | | | | | 17 | | Severinstraße ** | | underground, at-grade | 2015 |
| | | | | | | | | 16 | 17 | | Siegstraße * | | at-grade | |
| | | | | | | 13 | | | | 18 | Slabystraße * | | elevated, at-grade | 1974 |
| 3 | 4 | | | | | | | | | | Stegerwaldsiedlung * | | at-grade | |
| | | | | 9 | | | | | | | Steinweg | | at-grade | |
| | | | 7 | | | | | | | | Stüttgenhof | | at-grade | |
| | | 5 | | | | 13 | | | | | Subbelrather Straße/Gürtel * | | at-grade | |
| 3 | 4 | | | | | | | | | | Suevenstraße * | | at-grade | |
| | | | | | | | | | | 18 | Sülzburgstraße | | at-grade | |
| | | | | | | 13 | | | | 18 | Sülzgürtel ** | | at-grade | |
| | | | | 9 | | | | | | | Sülz Hermeskeiler Platz † | | at-grade | |
| | | | | | | | | 16 | 17 | | Sürth Bf ** | | at-grade | |
| | | | | | | | | 16 | | | Tannenbusch Mitte | | at-grade | |
| | | | | | | | | 16 | | | Tannenbusch Süd | | at-grade | |
| 3 | | | | | | | | | | 18 | Thielenbruch † | | at-grade | |
| | | | | | | | 15 | 16 | | | Ubierring ** | | at-grade | |
| | | | | | | | | 16 | | | Uedorf | | at-grade | |
| | | | | | | | 15 | 16 | | | Ulrepforte * | | at-grade | |
| | | | | 9 | | | | | | | Universität | | at-grade | |
| 1 | | | | 7 | | | | | | | | Universitätsstraße * | | at-grade | |
| | | | | | | | | 16 | | | Universität/Markt | | underground | |
| | | | | | | | | 16 | | | Urfeld | | at-grade | |
| 3 | 4 | | | | | 13 | | | | | Venloer Straße/Gürtel * | | underground | 1989 |
| | | | | 9 | | | | | | | Vingst | | underground | |
| | 4 | | | | | | | | | | Von-Sparr-Straße | | at-grade | |
| | | | | | | | | | | 18 | Walberberg | | at-grade | |
| | | | | | | | | | | 18 | Waldorf | | at-grade | |
| 1 | | | | | | | | | | | | Weiden Römergrab | | at-grade | |
| 1 | | | | | | | | | | | | Weiden West ** | | at-grade | |
| 1 | | | | | | | | | | | | Weiden Zentrum | | at-grade | |
| | | | | | | 13 | | | | | Weinsbergstraße/Gürtel | | at-grade | |
| | | | | | | | | | | 18 | Weißhausstraße | | at-grade | |
| | | | | | | | | 16 | | | Wesseling Nord | | at-grade | |
| | | | | | | | | 16 | | | Wesseling | | at-grade | |
| | | | | | | | | 16 | | | Wesseling Süd | | at-grade | |
| 3 | 4 | | | | | | | | | | Westfriedhof * | | at-grade | |
| | | | 7 | | | | | | | | Westhoven Berliner Straße | | at-grade | |
| | | | 7 | | | | | | | | Westhoven Kölner Straße | | at-grade | |
| | | | | 9 | | | | | | | Weyertal | | at-grade | |
| 3 | | | | | | 13 | | | | 18 | Wichheimer Straße * | | at-grade | |
| | | | | | | | | 16 | | | Widdig | | at-grade | |
| | 4 | | | | | 13 | | | | 18 | Wiener Platz * | | underground, at-grade | 1997 |
| | | | | | 12 | | 15 | | | | Wilhelm-Sollmann-Straße * | | at-grade | |
| 3 | 4 | | | | | | | | | | Wolffsohnstraße * | | at-grade | |
| | | | 7 | | | 13 | | | | | Wüllnerstraße station * | | at-grade | |
| | | | | | | | | 16 | | | Wurzerstraße | | underground | |
| | | | | | 12 | | | | | | Zollstockgürtel | | at-grade | |
| | | | | | 12 | | | | | | Zollstock Südfriedhof † | | at-grade | |
| | | | | | | | | | | 18 | Zoo/Flora | | at-grade | |
| | | | | 9 | 12 | | 15 | | | | Zülpicher Platz * | | at-grade | |
| | | | | 9 | | 13 | | | | | Zülpicher Straße/Gürtel * | | at-grade | |
| | | | 7 | | | | | | | | Zündorf † | | at-grade | |