This article needs to be updated. The reason given is: According to this source, the Kiato–Aigio section is actually part of the Peloponnese regional network instead of the Athens Suburban Railway. Please help update this article to reflect recent events or newly available information. (November 2023)

Athens Suburban Railway
An OSE class 460 train in the median strip of Attiki Odos, bound for Athens Airport.
Overview
Native name	Προαστιακός Αθήνας
Area served	Attica, part of Central Greece and Corinthia
Transit type	Commuter rail
Website	hellenictrain.gr
Operation
Began operation	30 July 2004; 20 years ago (2004-07-30)[1]
Operator(s)	Hellenic Train
Number of vehicles	20 OSE class 460 EMUs 17 OSE Class 560 DMUs
Technical
System length	227.82 km (141.56 mi)[2]: 2, 8
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	25 kV AC, 50 Hz
Top speed	160 km/h (99 mph)
System map Legend Kiato–Aigio line Chalcis Kiato Avlida Zevgolatio Kalochori-Panteichi Corinth Agios Georgios Loutraki Dilesi Michanikou towards Thessaloniki Isthmos Oinoi Agioi Theodoroi Oinofyta Kineta Agios Thomas Megara Avlona Nea Peramos Sfendali Magoula Afidnes Aspropyrgos Agios Stefanos Ano Liosia Dekeleia Acharnes Zefyri Acharnes Railway Center Kato Acharnes Metamorfosi Agioi Anargyroi Irakleio Pyrgos Vasilissis Neratziotissa Athens Kifisias Rouf Pentelis Tavros Line 3 via Syntagma Rentis Plakentias Lefka Elliniko Metro│OSE Piraeus   Pallini Paiania–Kantza Koropi   Athens Airport Key planned interchange under construction Athens Metro other lines This diagram: view talk edit

The Athens Suburban Railway (Greek: Προαστιακός Αθήνας, romanized: Proastiakós Athínas), officially the Athens Suburban and Regional Railway,^[3] is a commuter rail service that connects the city of Athens and its metropolitan area with other places in Attica, Boeotia, Corinthia and the city of Chalcis in Euboea.^[4]

The first section of the Suburban Railway, linking the main Athens railway station with the Athens International Airport, opened on 30 July 2004 – two weeks before the start of the 2004 Summer Olympics in the Greek capital.^[1] From 2005 to 2018, the network was gradually electrified and expanded to serve Piraeus to the south, Corinth and Kiato to the west, and Chalcis to the north. The Athens Suburban Railway is currently operated by Hellenic Train (formerly TrainOSE).

"Proastiakos SA" was founded in 2003 as a subsidiary of OSE to serve the operation of the suburban network in the urban complex of Athens during the 2004 Olympic Games. The first line, linking central Athens with Athens International Airport, was inaugurated on 30 July 2004, two weeks before the 2004 Olympic Games. This first section was not electrified and operated DMU'S every half hour.^[5] In January 2005 the test routes to Corinth started and the line was delivered to the public on 27 September that same year.^[6] Also in 2005 Proastiakos was absorbed by the company TRAINOSE SA., which was now responsible for providing all rail passenger and commercial transport. In 2007, with the completion of the works of the Airport-Patras line to Kiato, Proastiakos expanded services on what is now Line 5^[7] while in 2009 services where expanded to Chalkida forming Line 3.^[8] TrainOSE has been operating since 2008 as a company independent of OSE, still using the Proastiakos emblem. In 2009, with the Greek debt crisis unfolding OSE's Management was forced to reduce services across the network. Timetables were cut back, and routes closed as the government-run entity attempted to reduce overheads. Services from Athens Airport & Athens were cut back, with some ticket offices closing, reducing the reliability of services and passenger numbers.

However, from 2010, the electrification works of the lines with 25 kV AC, 50 Hz began to be completed, allowing the use of the Siemens Desiro 460 trains. The electrification projects were completed in the SKA department. - Kiato in 2010,^[9][10] on the Oinoi–Chalcis line in 2013,^[11] in the sections SKA-Oinoi and Treis Gefyres – SKA in 2015,^[12] and finally in the section Three Bridges – Piraeus in 2018.^[13] In fact, the advent of electrification in SS. Athenson July 30, 2017 led to the modification of the lines of the Suburban Railway to have as a starting point the central station of the capital.^[14] In 2017 OSE's passenger transport sector was privatised as TrainOSE, currently, a wholly owned subsidiary of Ferrovie dello Stato Italiane^[15] infrastructure, including stations, remained under the control of OSE. On 1 February 2018, the electrification of the Piraeus-Athens Central station section of the network was completed.

During the COVID-19 pandemic, TrainOSE provide free antiseptic gel to the passenger public in order to disinfect those who use the commuter train.^[16]

Since 1 August 2023^[update], the Athens Suburban Railway consists of four lines. Line A1 runs between Piraeus and Athens Airport, while Line A2 reinforces the preceding service along the median of the A6 motorway between the Airport and Ano Liosia. Line A3 runs between Athens and Chalcis, and Line A4 runs between Piraeus and Kiato.^[30][29] The train service between Kiato and Aigio is a local Peloponnese service.^[31] The Athens Suburban Railway operates from 4:30 am to midnight daily, and there are 45 stations in the network.^[30]

On 18 January 2012, services were "temporarily" suspended on routes from Piraeus - Ano Liossia.^[32] According to a TrainOSE spokesperson, the interruption is due to technical problems; however no information on the progress of any work was given,^[32] services were rerouted via SKA.

The following table lists the routes and the stations for the Athens Suburban Railway since 15 May 2022.^[30] Line numbers were introduced on 1 August 2023.^[29]

Outline of Athens Suburban Railway routes

Line	Map colour	Prefix	Route	Stations	Length	Ref.
	Yellow	12xx	Piraeus–Athens–Athens Airport	19	48.23 km	[33][2]: 2, 23
	Purple	22xx	Ano Liosia–Paiania–Kantza–Athens Airport	12	33.18 km	[33][2]: 8
		42xx	Ano Liosia–Paiania–Kantza	10	18.60 km	[33][2]: 8, 23
	Lime green	15xx, 25xx, 35xx	Athens–Chalcis	17	82.80 km	[34][2]: 2
	Sky blue	13xx, 23xx	Piraeus–Athens–Kiato	20	120.70 km	[35][2]: 2, 8

The suburban railway connects with other rail services at the following stations:

#	Station	Lines	Services	Connections	Regional unit
1	Acharnes	Athens–Chalcis			East Attica
2	SKA *	Ano Liosia–Airport Athens–Chalcis			East Attica
3	Afidnes	Athens–Chalcis			East Attica
4	Agioi Anargyroi	Athens–Thessaloniki			West Athens
5	Agios Georgios	Athens–Chalcis			Boeotia
6	Agios Stefanos	Athens–Chalcis			East Attica
7	Agioi Theodoroi	Piraeus–Kiato Aigio–Airport			Corinthia
8	Agios Thomas	Athens–Chalcis			Boeotia
9	Aigio †	Aigio–Airport Aigio–Athens Aigio–Kiato		Bus[36]	Achaea
10	Akrata	Aigio–Airport Aigio–Athens Aigio–Kiato			Achaea
11	Ano Liosia	Piraeus–Kiato Ano Liosia–Airport Aigio–Airport			West Attica
12	Aspropyrgos	Piraeus–Kiato			West Attica
13	Athens *†	Athens–Thessaloniki			Central Athens
14	Athens Airport *	Piraeus–Airport Ano Liosia–Airport Aigio–Airport			East Attica
15	Avlida	Athens–Chalcis			Euboea
16	Avlona	Athens–Chalcis			East Attica
17	Chalcis	Athens–Chalcis			Euboea
18	Corinth	Piraeus–Kiato Aigio–Airport Aigio–Athens			Corinthia
19	Dekeleia	Athens–Chalcis			East Attica
20	Diakopto *	Aigio–Airport Aigio–Athens Aigio–Kiato			Achaea
21	Dilesi	Athens–Chalcis			Boeotia
22	Doukissis Plakentias *	Piraeus–Airport Ano Liosia–Airport Aigio–Airport			North Athens
23	Eliki	Aigio–Airport Aigio–Athens Aigio–Kiato			Achaea
24	Irakleio	Piraeus–Airport Ano Liosia–Airport			North Athens
25	Kalochori-Panteichi	Athens–Chalcis			Boeotia
26	Kato Acharnes	Piraeus–Airport Piraeus–Kiato			West Athens
27	Kiato *	Piraeus–Kiato Aigio–Airport Aigio–Athens Aigio–Kiato		Bus[36]	Corinthia
28	Kifisias	Piraeus–Airport Ano Liosia–Airport Aigio–Airport			North Athens
29	Kinetta	Piraeus–Kiato			West Attica
30	Koropi *	Piraeus–Airport Ano Liosia–Airport			East Attica
31	Lefka	Piraeus–Airport Piraeus–Kiato			Piraeus
32	Lygia	Aigio–Airport Aigio–Athens Aigio–Kiato			Corinthia
33	Lykoporia	Aigio–Airport Aigio–Athens Aigio–Kiato			Achaea
34	Magoula	Piraeus–Kiato Aigio–Airport Aigio–Athens			West Attica
35	Megara	Piraeus–Kiato Aigio–Airport Aigio–Athens			West Attica
36	Metamorfosi	Piraeus–Airport Ano Liosia–Airport			North Athens
37	Nea Peramos	Piraeus–Kiato Aigio–Airport Aigio–Athens			West Attica
38	Nerantziotissa *	Piraeus–Airport Ano Liosia–Airport Aigio–Airport			North Athens
39	Oinofyta	Athens–Chalcis			Boeotia
40	Oinoi *	Ano Liosia–Airport			Boeotia
41	Paiania–Kantza *	Piraeus–Airport Ano Liosia–Airport			East Attica
42	Pallini *	Piraeus–Airport Ano Liosia–Airport			East Attica
43	Pentelis	Piraeus–Airport Ano Liosia–Airport			North Athens
44	Piraeus *	Piraeus–Airport Piraeus–Kiato			Piraeus
45	Platanos	Aigio–Airport Aigio–Athens Aigio–Kiato			Achaea
46	Pyrgos Vasilissis	Piraeus–Airport Piraeus–Kiato			West Athens
47	Rentis	Piraeus–Airport Piraeus–Kiato			Piraeus
48	Rouf	Piraeus–Airport Piraeus–Kiato			Central Athens
49	Sfendali	Athens–Chalcis			East Attica
50	Tavros	Piraeus–Airport Piraeus–Kiato			South Athens
51	Xylokastro	Aigio–Airport Aigio–Athens Aigio–Kiato			Corinthia
52	Zefyri	Piraeus–Kiato			West Athens
53	Zevgolatio	Piraeus–Kiato Aigio–Athens			Corinthia

The suburban train, in the sections Magoula-Koropi and Piraeus-Dhekelia are part of the urban zone of OASA, therefore the single ticket that is used and combined with all means of transport in Athens is valid.^[37] Outside the urban area, a different ticket is valid, which is priced in stages and issued by Hellenic Train.

The photography in the publicly accessible areas of both OSE and the Athens Suburban Railway (defined as passenger space on trains and at stations) is permitted, as the right of photographers to photograph within the Suburban Railway is covered by the Constitution. The issue was mediated by the Ombudsman between 2004 and 2008 on the occasion of the attempt to temporarily ban photography during the Olympic Games. The court ruled that "the requirement of a 'photography permit' is tantamount to a ban" and that "there is no legal authority to impose restrictions on the right to photograph spaces and slides by definition accessible to the public".^[38]

• Additional station in Kryoneri by 2021.^[39][40]
• Additional station in Gerakas.

• Larissa Station-Agios Dionysios via Piraeus connection with Cretan ships, (with the final destination being Thessaloniki)
• Reopening the suburban double line from SKA to Ano Liosia, MAK, Neoktista,^[41] Aspropyrgos Refineries, Old Aspropyrgos Station, and Elefsina, with the service of Hellenic Petroleum.^[42] The Elefsina line is planned to continue to Loutropyrgos and the old Megaron railway with a single regular line.^[43]
• Reopening from Agios Apostolos to Isthmus.

A nine-station, 32 km extension of the Athens Suburban Railway from Koropi to Lavrio was announced in 2016, potentially connecting 300,000 more people to the rail network at a cost of €160 million.^[44][45] The project involves the construction of two new stations at Markopoulo and Lavrio Port, and five intermediate stops at Kalyvia, Keratea, Daskaleio, Thorikos and Kyprianos.^[44][46] The Athens-Lavrio distance will be 55 minutes and Koropi-Lavrio 28 minutes with the completion of the extension.

In February 2019, OSE accepted a bid for the €12 million project to convert the former metre-gauge line between Isthmos and Loutraki to standard gauge, connect it to the Athens Airport–Patras railway and reopen it to passenger traffic by November 2021.^[47] Mytilineos–Xanthakis was selected as the contractor of the project. Due to an appeal by a rival bidder, the signing of the contract was delayed until 12 June 2019.^[48] The project consists of the electrification of the Isthmos–Loutraki line and building two new stops, one at Casino and the other in Loutraki.^[49]

A €40 million branch line from Doukissis Plakentias station to the town of Rafina has also been proposed.^[50] with an extension to the Airport via Artemida and Rafina.^[51]

• Hellenic Railways Organisation
• Hellenic Train
• Proastiakos
• Public transport in Athens
• Athens Metro
• Athens Airport–Patras railway
• Piraeus–Patras railway
• Proastiakos Patras
• Thessaloniki Suburban Railway
• Rail transport in Greece

Railway map