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S4

Dublin · bus timetable

Bus S4 Liffey Valley - UCD

Line S4 connects Liffey Valley SC with UCD: on weekdays it departs from 05:30 to 23:20, every ~10 min.

  • Headway~10 min
  • First departure05:30
  • Last departure23:20
  • Average ride~59 min
  • Stops57
  • Departures per day107
  • Route length18.9 km
  • Peak~85 min
  • Off-peak~41 min
  • Saturday90 departures
  • Sunday58 departures

Bus of Dublin public transport — connects Liffey Valley SC and UCD, with 57 stops per direction.The first departure is at 05:30, the last at 23:20.Departures run every ~10 min, and the ride takes ~59 min on average.

Single ticket: €2.00

Source: National Transport Authority (Transport for Ireland) GTFS, version 924629DB-7A2F-4D39-B0EE-92FDCF6D0D0A, valid until 10 November 2027.

Timetable

First

05:30

Last

23:20

Departures

107

Line S4 timetable — on weekdays
05 3050
06 05203040434750
07 001020304050
08 001020304050
09 001020304050
Line S4 timetable — on Saturdays
06 00153045
07 00153045
08 00153045
09 001020304050
10 001020304050
Line S4 timetable — on Sundays and holidays
07 2545
08 052545
09 052545
10 05203550
11 05203550
Valid from10.11.2026.
Changed26.09.2026.
Checked11.11.2026.

Stops

57 stops~59 min in total
  1. Liffey Valley SC

    #7884

    80departure0min
  2. 80W2+1 min1min
  3. 80W2+1 min2min
  4. 80G2+1 min3min
  5. 80G2+1 min4min
  6. G2L55+1 min5min
  7. G2L55+1 min6min
  8. G2L55+1 min7min
  9. G2L55+1 min8min
  10. 60G2L55+1 min9min
  11. 60G1G2L55+1 min10min
  12. G1G2L55+1 min11min
  13. Kylemore Road

    #2700

    60+1 min12min
  14. Ballyfermot Cr

    #2701

    60+1 min13min
  15. 60860+1 min14min
  16. Kylemore Way

    #2784

    +1 min15min
  17. Bluebell Avenue

    #2785

    +1 min16min
  18. Kylemore Luas

    #2786

    +1 min17min
  19. Kylemore

    #7941

    +1 min18min
  20. Walkinstown Ave

    #2787

    +1 min19min
  21. 56A151+1 min20min
  22. 56A151+1 min21min
  23. 56A151+1 min22min
  24. Crumlin Hospital

    #1421

    +1 min24min
  25. Saint Mary's Road

    #2317

    150+1 min25min
  26. Somerville Avenue

    #2318

    150+1 min26min
  27. Crumlin Village

    #7942

    +1 min27min
  28. Saint Agnes Church

    #2319

    150+1 min28min
  29. Ashleaf

    #2434

    F3+1 min29min
  30. Westbrook

    #2435

    F3+1 min30min
  31. L O'Toole Pk

    #2436

    F3+1 min31min
  32. 15AF2F3+1 min32min
  33. 15A74+1 min33min
  34. 15A74+1 min34min
  35. 15A74+1 min35min
  36. 15A74+1 min36min
  37. 15A74+1 min37min
  38. 1515A6565B+1 min38min
  39. Highfield Road

    #7943

    +1 min40min
  40. Palmerston Pk

    #7945

    +2 min42min
  41. Trinity Hall

    #1025

    142+1 min43min
  42. 142511+1 min44min
  43. South Hill

    #1027

    142+1 min45min
  44. Chuchtown Rd Lwr

    #1028

    142+1 min46min
  45. Milltown Luas

    #7946

    +1 min47min
  46. Shangarry

    #7947

    +1 min48min
  47. Bankside Cottages

    #7948

    +1 min49min
  48. 4444D142+1 min50min
  49. 4444D142+1 min51min
  50. Bird Avenue

    #3012

    142+1 min52min
  51. Roebuck Road

    #7949

    +1 min53min
  52. Clonskeagh Road

    #878

    11+1 min54min
  53. UCD Sports Centre

    #8558

    +1 min55min
  54. UCD Newman

    #7950

    142+2 min57min
  55. UCD

    #765

    S6+2 min59min

Lines on the same route

Other Dublin lines that share stops with line S4.

Frequently asked questions

When are the first and last departures of line S4?

On weekdays the first departure from Liffey Valley SC is at 05:30 and the last at 23:20. There are 107 departures in total.

Does line S4 run on weekends?

Yes — on Saturday from 06:00 to 23:20 and on Sunday from 07:25 to 23:25.

Does line S4 run on Sundays?

Yes. On Sundays line S4 has 58 departures from Liffey Valley SC, the first at 07:25 and the last at 23:25.

How often does line S4 run?

Departures run about every 10 minutes (median headway between 06:00 and 21:00 on weekdays). It is denser at peak and sparser in the evening and at weekends.

How long is the ride on line S4?

The whole ride takes about 59 minutes on average — from about 41 minutes off-peak to about 85 minutes at peak.

How many stops does line S4 have?

In the Liffey Valley SC → UCD direction, line S4 has 57 stops.

How long is the route of line S4?

The route in this direction is about 18.9 km long.