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KM21İETT city bus line

KM21 bus: stops and timetable

Cevizli Peronlar – Sütçü İmam Caddesi

  • 49 stops
  • ~49 min end to end
  • weekdays 06:25–00:10
  • 55 trips

KM21 bus stops

The KM21 is an İETT city bus line through Maltepe, Kartal, Pendik. It has 49 stops between Cevizli Peronlar and Sütçü İmam Caddesi and takes about 42 minutes according to the planned timetable. İETT's trip records from the last 14 days (246 trips) show it usually takes 40–65 minutes (median 49; ~59 at weekday rush hour, ~45 at night).

Minutes are the planned time from the first stop: İETT's running time for the line, spread between stops by distance; it changes with traffic. A line badge marks a rail station within 300 m of the stop. Stop pages are in Turkish.

KM21 timetable: first and last bus, how often

Cevizli Peronlar → Sütçü İmam Caddesi
DayHoursEvery
Weekdays06:25–00:1010–40 min
Saturday06:40–23:4010–45 min
Sunday06:40–00:1010–60 min
Sütçü İmam Caddesi → Cevizli Peronlar
DayHoursEvery
Weekdays05:15–23:005–35 min
Saturday05:15–23:005–45 min
Sunday05:30–22:3010–60 min

Times are departures from the first stop. All departure times · PDF, in Turkish (375 KB)

KM21 bus route map: Cevizli Peronlar – Sütçü İmam Caddesi, 49 stops
The KM21 route and its stops on the map (towards Sütçü İmam Caddesi). Labels on the image are in Turkish.

KM21 departure times

From Cevizli Peronlar · Weekdays

  • 062530A50A
  • 0710A2030A55A
  • 080520A45A55
  • 09153030A
  • 101015A
  • 111515A50
  • 1200A3045A
  • 133030A
  • 141020A40A
  • 150000A20A40A50
  • 1600A20A4040A
  • 1705A3030A55A
  • 181020A45A
  • 190030A50
  • 2015A40
  • 2100A2045A
  • 220530A
  • 2300A
  • 0010A

Marked departures from Cevizli Peronlar run a different route (İETT's note, in Turkish):

  • A Sabiha Gökçen Havalimanı - Kartal Metro arasında çalışır (stops shown as on the main route)

Marked departures from Sütçü İmam Caddesi run a different route (İETT's note, in Turkish):

  • A Sabiha Gökçen Havalimanı - Kartal Metro arasında çalışır (stops shown as on the main route)

Source: departure times from İETT's line page (25 October 2026); stops and running times from the İETT planned timetable (İBB Open Data), valid 16 March 2026 – 31 December 2026. Times are departures from the first stop; when the bus passes later stops depends on traffic. Trips after midnight are listed under the previous day.

Where can you change from the KM21 to metro, tram or Metrobus?

Distances are straight-line. To continue by rail, use directions.

Frequently asked questions

How many stops does the KM21 have?

49 stops from Cevizli Peronlar to Sütçü İmam Caddesi, 50 in the opposite direction. The full route takes about 42 minutes according to the planned timetable. In İETT's trip records it usually takes 40–65 minutes (median 49; ~59 at weekday rush hour).

What time is the first and last KM21 bus?

On weekdays from Cevizli Peronlar: the first bus is at 06:25 and the last at 00:10. Sunday: first 06:40, last 00:10.

How often does the KM21 run?

On weekdays it is most frequent around 15:00, about every 12 minutes; 55 trips a day. Times are planned; traffic changes when the bus actually passes a stop.

How much is the KM21 bus?

46.20 TL full fare and 22.55 TL student fare with an Istanbulkart, whatever the distance. You pay less when you transfer from another vehicle (tariff of 20 July 2026).

Live bus positions and İETT service announcements for this line are on the Turkish page.

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