This page presents a list of the longest continuous underground rapid transit tunnel sections of the world, excluding branches from the longest tunnel (branch lines that used to transport passengers should be included).

Note: This article only lists tunnels that are 15 km (9.32 miles) or longer.

World's longest subway tunnel sections in use

NameSystem Country Stations Length in km (mi) Year ofcompletion Lines 3-11 Suzhou Metro Line 3 and Line 11 are connected at Weiting Station with through trains passing by. 2019–2023 M11 Istanbul Metro Gayrettepe – Halkalı 2023–2025 Line 6 Chengdu Metro Wangcong Temple – Lanjiagou 2020 Line 3 Guangzhou Metro Haibang – Airport North 2005–2024 Line 19 Chengdu Metro Huangshi to Tianfu 2020–2023 Line 7 Wuhan Metro Tenglong Boulevard – Qinglongshan Ditiexiaozhen 2018–2024 Line 1 Qingdao Metro Dongguozhuang to Wangjiagang 2020–2021 Line 18 Guangzhou Metro to 2021 Bolshaya Koltsevaya line Moscow Metro Circle route (excluding Moscow-City branch) 2018–2023First stretch opens in 1969 as part of line 2 Line 10 Beijing Subway Circle route 2008–2013 Line 5 Hangzhou Metro - 2019–2025 Line 7 Guangzhou Metro – 2016–2023 Line 6 Beijing Subway – 2012-2018 Line 2 Wuhan Metro Julong Boulevard – Fozuling 2012–2019 Line 8 Zhengzhou Metro Tianjianhu – Lumiao 2024 Seoul Subway Line 5(longest branch) Seoul Subway Banghwa–Hanam Geomdansan 1995–2021 Line 2 Wuhan Metro Julong Boulevard - Fozuling 2012–2019 Line 8 Xi'an Metro Shanmenkou – Shengtiyuguan 2024 Line 16 Beijing Subway – Wanpingcheng 2016–2023 Sokolnicheskaya line Moscow Metro Potapovo – Bulvar Rokossovskogo 1935–2024 Arbatsko-Pokrovskaya line Moscow Metro Pyatnitskoye Shosse – Shchyolkovskaya 1938–2012 Lyublinsko-Dmitrovskaya line Moscow Metro Zyablikovo – Fiztekh 1995–2023 Line 11 Guangzhou Metro Longtan – Chisha 2024 Zhengxu line Zhengzhou Metro Chang'an Lu Bei – Baqian 2023 Zamoskvoretskaya line Moscow Metro Khovrino – Alma-Atinskaya 1938–2018 Line 8 Beijing Subway – 2012–2021 Line 6 Wuhan Metro Xincheng 11th Road – Dongfeng Motor Corporation42.5 km (26.4 mi)2016–2021 Line 15 Shanghai Metro Gucun Park – Zizhu Hi-tech Park 42.3 (26.3) 2021 Line 5 Chengdu Metro Jiudaoyan – Huilong 42.3 (26.3) 2019 Tagansko-Krasnopresnenskaya line Moscow Metro Planernaya – Kotelniki 42.2 (26.2) 1966–2015 Line 1 Xi'an Metro Xianyangxizhan – Fangzhicheng42.2 (26.2)2013–2023 Line 14 Beijing Subway – 42 (26) 2015–2021 Line 6 Tianjin Metro – 42 (26) 2016–2021 Downtown MRT line Mass Rapid Transit (Singapore) Bukit Panjang – Expo 41.9 (26) 2013–2017 Line 2 Xiamen Metro Tianzhushan – Wuyuanwan41.6 (25.9)2019 Line 3 Nanjing Metro Xinghuolu – Mozhoudonglu 41.5 (25.8) 2015 Line 4 Suzhou Metro Longdaobang — Tongli 41.5 (25.8) 2017 Serpukhovsko-Timiryazevskaya line Moscow Metro Altufyevo – Bulvar Dmitriya Donskogo 41.2 (25.6) 1983–2002 Line 1 Zhengzhou Metro Henan University of Technology – New Campus of Henan University41.2 km (25.60 mi)2013–2019 L-12 (Metro Sur) Madrid Metro Circle route 40.96 (25.5) 2003 Toei Oedo Line Toei Subway Hikarigaoka – Tocho-mae 40.7 (25.3) 1991–2000 Seoul Subway Line 9 Seoul Subway Gimpo Airport – VHS Medical Center 2018 Line 6 Zhengzhou Metro Donglinsi – Qinghua Fuzhong 2022-2024 Line 12 Shanghai Metro Qixin Road – Jinhai Road 2015 Line 5 Zhengzhou Metro Circle route 2019 Line 7 Beijing Subway - 2021 Line 6 Xi'an Metro Xi'annanzhan – Fangzhicheng 2020–2024 Line 11 Wuhan Metro Jiang'an Road – Gediannan Railway Station 2018–2024 Line 4 Chengdu Metro Wansheng – Chengdu University 2015–2017 Line 7 Chengdu Metro Circle route 2017 |- Line 8 Wuhan Metro Jintan Road – Military Athletes' Village38.2 km (23.7 mi)2017–2021 Kaluzhsko-Rizhskaya line Moscow Metro Medvedkovo – Novoyasenevskaya 37.8 (23.5) 1958–1990 Line 12 Guangzhou Metro Xunfenggang – Higher Education Mega Center South37.6 (23.36)2025 Line 1 Chengdu Metro Weijianian – Science City 37.47 (23.3) 2010–2018 Line 2 Shenzhen Metro Chiwan – Xinxiu 35.78 (22.23) 2011 Busan Subway Line 2 Busan Transportation Corporation Jangsan–Dongwon 35.5 (22.06) 1999 Metro North West & Bankstown Line Sydney Metro Cherrybrook – Sydenham 2009–2024 Line 4 Xi'an Metro Xi'an Beizhan – Hangtianxincheng35.2 (21.9)2018 Seoul Subway Line 6 Seoul Subway Eungam Loop – Bonghwasan 35.1 (21.8) 2001 Seoul Subway Line 7(longest branch) Seoul Subway Cheongdam – Bupyeong-gu Office 35.1 (21.7) 2012 Line 5 Tianjin Metro – 34.8 (21.6) 2018–2021 Line 7 Shanghai Metro Panguang Road – Huamu Road 34.4 (21.38) 2010 Line 8 Guangzhou Metro Wanshengwei—Jiaoxin 33.9 (21.1) 2010–2020 Line 1 Ürümqi Metro Santunbei – International Airport33.7 km (20.9 mi)2019 Line 2 Xi'an Metro Caotan –Changninggong33.6 (20.9)2011–2023 M4 Istanbul Metro Kadıköy – Sabiha Gökçen Havalimanı 33.5 (20.8) 2012–2022 Circle MRT line Mass Rapid Transit (Singapore) Dhoby Ghaut – HarbourFront 33.3 (20.69) 2009–2012 Line 3 Wuhan Metro Zhuanyang Boulevard – Hongtu Boulevard33.2 km (20.63 mi)2015 L-7 Madrid Metro Hospital del Henares – Pitis 32.9 (20.5) 2007 U7 Berlin U-Bahn Rathaus Spandau-Rudow 31.8 (19.7)"World's longest railway tunnel" 1984–1988 1924–1984 Line 3 Zhengzhou Metro Henan Sports Center - Binhe Xincheng Nan31.8 (19.7)2020-2023 Line 3 Mumbai Metro SEEPZ – Cuffe Parade 2024–2025 Bucharest Metro Line M1 Bucharest Metro Pantelimon – Dristor 2 31.01 km (19.3 mi) 1979–1991 Line 1 Beijing Subway – 31.0 (19.3) 1971–2000 Line 2 Zhengzhou Metro Jiahe – Nansihuan30.9 km (19.2)2016–2019 Solntsevskaya line Moscow Metro Aeroport Vnukovo – Delovoy Tsentr 30.9 (19.2) 2014–2023 M5 Istanbul Metro Üsküdar – Sultanbeyli 30.9 (12.5) 2017–2026 IND Eighth Avenue Line and IND Fulton Street LineNote that both lines are served continuously by the train within a single tunnel. New York City Subway Inwood – 207th Street – Grant Avenue 30.8 (19.14) 1956 Line 2 Orange Montreal Metro Côte-Vertu – Montmorency 30.8 (19.14) 2007 Thomson–East Coast line Mass Rapid Transit (Singapore) Woodlands North – Gardens by the Bay 2020–2022 Line 2 Shanghai Metro East Xujing – Longyang Road 30.2 (18.77) 2010 Moskovsko-Petrogradskaya Line Saint Petersburg Metro Parnas–Kupchino 30.1 (18.7) 1961–2006 Line 8 Shanghai Metro Shiguang Road – Luheng Road 29.7 (18.45) 2009 Kirovsko-Vyborgskaya Line Saint Petersburg Metro Devyatkino – Prospekt Veteranov 29.57 (18.4) 1955–1978 Line 4 Zhengzhou Metro Laoyachen - Langzhuang29.29 (18.2)2020 Line 4 Wuhan Metro Yong'antang – Wuhan Railway Station29.2 (18.1)2013–2019 Line 8 Chengdu Metro (Phase 2 is 7.94 km) 29.1 (18.1) 2020 Line 13 Chengdu MetroQiligou – Longhua Temple 2025 Line 2 Chengdu Metro Tianhe Road – Chengdu Institute of Public Administration 29.0 (18.0) 2012–2013 Line 3 Wuxi Metro Sumiao – Sunan Shuofang International Airport28.8 (17.9)2020 Bannan Line (Taipei Metro Blue Line) Taipei Metro Dingpu – Taipei Nangang Exhibition Center 28.2 (17.6) 1999–2015 Line 4 Beijing Subway – 28.2 (17.5) 2009–2010 Incheon Subway Line 1 Incheon Subway Bakchon – International Business District 27.9 (17.42) 1999–2009 Line 5 Wuhan Metro East Square of Wuhan Railway Station – Fenghuocun 27.9 (17.42)2021–2023 Line 14 Paris Métro Saint-Denis–Pleyel – Aéroport d'Orly 27.8 (17.3) 1998–2024 Northern line London Underground Morden – East Finchley 27.8 (17.2) 1890–1940 Nevsko-Vasileostrovskaya Line Saint Petersburg Metro Begovaya–Rybatskoye 27.7 (17.2) 1967–2018 Tanimachi Line Osaka Metro Dainichi–Nagahara 27.1 (16.7) 1967–1983 Line 1 Milan MetroThe whole line is underground27 km (17 mi)1964–2005 Line 7 Zhengzhou Metro Dongzhao – Nangangliu26.8 (16.7)2024 M3 Istanbul Metro Bakırköy Sahil – Şehir Hastanesi Viaduct 26.7 (16.6) 2013–2025 Meijo Line Nagoya Municipal Subway Circle route 26.4 (16.4) 1965–2004 B Line Los Angeles Metro Rail - 26.4 (16.4) 1993–2000 Line 30 Chengdu Metro (Phase 1 is 26.28 km) 2025 Frunzensko-Primorskaya Line Saint Petersburg Metro Komendantsky Prospekt – Shushary 26.2 (16.3) 1997–2019 Line 1 Suzhou Metro Mudu – Zhongnan Jie 25.7 (16.0) 2012 Line 4 Wuxi Metro Liutan – Wuxi Taihu International Expo Center25.4 km (15.8 mi)2021 Line 3 Athens Metro – Doukissis Plakentias 25.3 (15.72) 2023 Line 9 Xi'an Metro Fangzhicheng – Qinlingxi25.2