Where does SBS Transit Bus Service 103 go, and which interesting places are worth visiting? Service 103 runs between Serangoon Bus Interchange and Yishun Bus Interchange through Serangoon North, The Greenwich, Jalan Kayu, Seletar Aerospace Park and Yishun’s residential and town-centre streets. It is useful for a short heritage-food outing at Jalan Kayu, an appropriately mapped visit to the public areas of Seletar Aerospace Park or a trip to Yishun for a meal, sports event or rail connection.

There is a meaningful difference between Bus 103 and the other buses serving Seletar. Service 103 enters the aerospace park through Piccadilly and Seletar Aerospace Drive, then travels along West Camp Road and passes stops such as 68131 Opp Youth Flying Club and 68141 Opp JTC Aviation Two. This is a working aviation district containing some public dining, heritage and nature attractions. A bus stop beside an aviation institution does not permit tourists to enter hangars, airfields or secured workplaces.

Quick answer: Serangoon Int (66009) → The Greenwich (67049) → Jalan Kayu Shophouse (68031) → Seletar Aerospace Park via 68091/68081/68141 → Yishun Central/Khoo Teck Puat Hospital vicinity (59349) → Yishun Int (59009). The best outing is one with an exact public destination, a checked walking route and a suitable way home, rather than trying to visit every place in this long service.

Key facts: route, operator, last bus and special warnings

• Operator: SBS Transit, not SMRT or Go-Ahead.
• Terminals: Serangoon Int (66009) and Yishun Int (59009); conventional two-terminal route, not a Punggol loop.
• From Serangoon: first bus 6am daily; final listed departure 12.15am Mondays–Fridays, midnight Saturdays/Sundays/public holidays.
• From Yishun: first bus 6am, last midnight daily in the operator’s published table; origin times are not intermediate-stop guarantees.
• Length: the operator lists about 18 km for the Serangoon-to-Yishun direction.
• Best publicly visitable clusters: The Greenwich/Jalan Kayu streets, The Oval’s public dining and heritage environment, Hampstead Wetlands Park, and Yishun’s public town centre.
• Working-industrial reality: Seletar Aerospace Park contains airfield, aerospace and aviation businesses with controlled sites; stay in permitted public areas.
• Last-mile limit: the published route serves roads in Seletar, but the exact entrance to The Oval or Hampstead Wetlands requires a separate pedestrian map.
• Route distinctions: 102 runs from Hougang on a Seletar loop; 117 runs from Punggol Coast towards Sembawang; neither is simply an alternative name for 103.

Where to alight: stop codes with a realistic purpose

These are selected actual service stops in the named order, not guarantees of an attraction’s entrance or an accessible walking path. Before departing, verify the venue’s public entrance, a suitable crossing, operating hours and the return stop.

Destination / purpose	Published bus stop and direction	What to do, and check
Serangoon MRT and NEX precinct	66009 Serangoon Int, start	NE12/CC13, nearby shops and public amenities; confirm the interchange berth.
Serangoon Sports Complex	63361 Opp S’goon Sports Cplx, Yishun-bound	A booked sport or publicly advertised event, not unrestricted field access.
The Greenwich / Seletar Hills	67049 The Greenwich, Yishun-bound	Neighbourhood meal or errand; check each tenant and exact building entrance.
Jalan Kayu Shophouses	68031 Jln Kayu Shophouse, Yishun-bound	Traditional food and public-street heritage; safe crossings and opening hours.
Seletar public precinct near Baker Street	68091 Aft Baker St, Yishun-bound	Select a separately mapped public dining/heritage/wetland venue; the bus stop is not necessarily its entrance.
Seletar Aerospace Park internal roads	68081 Bef Seletar A’space Rise / 68101 Rolls Royce Pte Ltd	Workplace stops; private aviation premises require authorised entry.
West Camp Road aviation heritage corridor	68131 Opp Youth Flying Club; 68141 Opp JTC Aviation Two	Observe public district design from legal sidewalks; do not enter airfield or flying club without permission.
SAFRA Yishun vicinity	59709 Bef SAFRA Yishun, Yishun-bound	Confirm the particular club activity and member/public access conditions.
Khoo Teck Puat Hospital vicinity	59349 Opp Khoo Teck Puat Hosp	For a genuine medical appointment or authorised visit; verify the actual entrance.
Yishun MRT / Northpoint City vicinity	59009 Yishun Int	Shopping, food and North South Line transfer at NS13; follow signed routes.

Why Bus 103 is a distinct Serangoon-to-Yishun route

Service 103 begins at Serangoon Bus Interchange, connected to Serangoon MRT and NEX. The early stops include Upper Serangoon Road, Boundary Road and Yio Chu Kang Road, then pass Serangoon North’s residential streets. These stops are useful for people with local homes, appointments and work, even if they are not headline sightseeing locations.

After Seletar Hills, the bus follows Sengkang West Road and Jalan Kayu. The road environment changes to low-rise heritage shophouses and then to a planned aerospace business estate. The final section crosses Yishun Avenue 1 and Yishun Central before reaching the interchange. This sequence is what makes the route interesting: it links multiple kinds of neighbourhood rather than one shopping mall to another.

A person starting in Punggol should not assume that 103 boards at either Punggol interchange. The route reaches Serangoon and Yishun, but its starting point is Serangoon Int. Someone living near Punggol Coast may find Service 117 to Seletar more convenient; a Hougang resident may consider 102. Compare the actual address and last-mile walking, not just the broad district name.

The route may be useful for a short trip to The Greenwich without travelling all the way to Yishun. It may also be useful for a specific Yishun appointment without any leisure stop. This flexibility makes accurate local travel information valuable even when an article mentions interesting places along the way.

A full-route map tells you where the bus drives, but the stop list tells you where passengers can lawfully get on and off. An aviation industrial estate includes roads and access-controlled sites, so the distinction is particularly important.

The Greenwich: a small neighbourhood outing before Jalan Kayu

At stop 67049 The Greenwich, the bus enters a smaller commercial and residential cluster. This is appropriate for a meal, short errand or meeting someone rather than a grand tourist attraction. Choose the actual restaurant or public shop before leaving home, because its operating hours and tenancy can change.

An adult travelling with a young child can use the visit as a straightforward transport lesson: look for the building name, identify the bus stop, cross legally, locate the selected entrance and agree on the return point. No need to create a rushed list of three shopping centres to make the ride worthwhile.

The surrounding Seletar Hills area includes houses and roads with controlled private entrances. A neighbourhood described as interesting from an architectural perspective is not a permission to photograph people inside homes or enter residential compounds.

The bus continues beyond The Greenwich toward Jalan Kayu. If the group wants a meal at a specific Jalan Kayu outlet, do not assume The Greenwich is the nearest stop just because its name is familiar. Match the business address to the later route table and the pedestrian network.

Jalan Kayu shophouses: food, heritage and a real street

SBS Transit’s Serangoon-to-Yishun route lists 68031 Jln Kayu Shophouse. The National Heritage story of Jalan Kayu is tied to its earlier relationship with RAF Seletar and to the survival of distinctive two-storey shophouses. It is a good subject for a brief public-street heritage visit, provided visitors respect ordinary residents and businesses.

A practical outing could centre on traditional food at a currently operating outlet. The area is associated with roti prata and small eateries, but a particular restaurant’s reputation is not a guarantee it is open today, that the menu is unchanged or that a dish fits every visitor’s dietary needs. Confirm current opening hours or have a sensible backup meal.

For an educational walk, compare the older shopfronts with modern housing and office buildings seen from the bus. Record observable features—height, five-foot way, street-facing shop layout—and use a historical source to explain when and why the street developed. An observation is evidence of today’s scene, not automatic proof of a century-old history.

Road safety matters. Jalan Kayu is a working traffic corridor, not an entirely pedestrianised heritage street. Cross at appropriate crossings and avoid blocking shop doors. Parents should supervise children around the bus stop rather than asking them to pose in the road for photographs.

For the return, check the reverse Yishun-to-Serangoon route. Do not assume the outbound 68031 stop is the correct Serangoon-bound boarding point; it is safer to identify both directions from the operator tables before leaving a restaurant.

Seletar Aerospace Park: public enjoyment within a working aviation district

JTC identifies Seletar Aerospace Park as a working aerospace precinct with some public destinations. The Oval combines restored black-and-white bungalow surroundings with dining and leisure activity. A public aviation-themed playground and heritage material make it more than a purely industrial area for some visitors.

Service 103 calls at road stops such as 68091 Aft Baker St and 68081 Bef Seletar A’space Rise, then moves deeper through the estate and West Camp Road. These stops identify legitimate boarding and alighting places; they do not place every public attraction directly at the kerb.

Before leaving, choose The Oval, the playground, a particular current restaurant or another permitted JTC site. Then inspect the map for its public entrance and walking route from a stop served by 103. Do not describe a private aviation company as a visitor destination merely because a stop has its name.

The Seletar area’s mix of heritage bungalows, new industrial buildings and trees can become an interesting learning exercise in land use. Why can a technology district also preserve parts of its history and provide public green space? Use a JTC interpretation or other trusted information rather than making up stories about individual buildings.

Airport operations remain different from public heritage activity. Flying-club, runway, hangar and restricted business gates must not be entered without permission. Plane spotting should happen only from lawful public viewpoints and without trespassing or interfering with operations.

Some public leisure areas can be busy or weather-exposed. A shorter visit to one permitted destination is more comfortable than a day spent walking between several widely spaced road stops in the heat.

Hampstead Wetlands: public nature with a separate entrance

NParks describes Hampstead Wetlands Park as a 3.23-hectare nature sanctuary at Seletar Aerospace View and Hampstead Gardens, with freshwater vegetation, birds and other wildlife. NParks lists the park as open 24 hours, but that does not mean every route into the surrounding industrial estate should be walked after dark.

The park is a reasonable quiet alternative to a large paid attraction. A child can observe the difference between a wetland and a landscaped town-centre park, look at plant shapes or listen for birds. Wildlife sightings are unpredictable; an honest guide should never guarantee a kingfisher or dragonfly at a particular hour.

Although Bus 103 operates through nearby Seletar roads, the route does not have a stop labelled ‘Hampstead Wetlands entrance’. Use the park’s exact entrance and map a safe pedestrian approach from a real bus stop. A public wetland path is not permission to cut across an aviation workplace or fenced compound.

Respect designated paths, avoid feeding animals and leave nesting areas undisturbed. In thunderstorms, choose safety rather than trying to reach a particular viewing platform. A wetland visit can be shortened or replaced by a public dining venue when weather changes.

NParks lists general wheelchair accessibility for the park, but the correct route from a bus stop must also be accessible for the person travelling. The stop kerb, crossings, slopes and path entrance all matter. One accessible destination label does not verify the full door-to-door journey.

This nature option should be distinguished from a much longer park connector or aviation heritage circuit. Choose an activity suitable for the youngest or least mobile member of the party, and plan a reliable return bus before the group becomes tired.

West Camp Road: transport for aviation businesses, not public airfield access

Beyond The Oval area, Bus 103 travels on Seletar Aerospace Drive and West Camp Road. Named stops include 68101 Rolls Royce Pte Ltd, 68131 Opp Youth Flying Club, 68141 Opp JTC Aviation Two and 68151 Bef Shell Aviation. These are legitimate places for workers and authorised visitors to connect with the public transport network.

However, none is an open invitation to enter a factory, aviation security installation, private flying club or hangar. If someone has a work appointment, check the precise employer gate and visitor registration. If someone merely wants an aviation-themed family outing, focus on JTC’s public attractions.

Many industrial roads have different pedestrian arrangements from shopping streets. The nearest stop on a map may still require a considerable walk and the safest route may not be a straight line. Do not cross security barriers or loading areas to shorten the trip.

This is one of the strongest reasons for honest place-based travel content. A bus can serve a highly specialised working estate and simultaneously provide access to some public attractions, but the two categories must not be merged into one blanket claim of tourist access.

If the destination is Yishun, you can remain on the bus beyond the aerospace roads without stopping. If the destination is a public park, leave at the correctly mapped earlier stop rather than waiting for a business label and trying to work backwards.

Yishun: sports, healthcare and the town-centre finish

After leaving Seletar, the Yishun-bound route enters residential Yishun Avenue 1 and Avenue 11. It serves 59709 Bef SAFRA Yishun and 59349 Opp Khoo Teck Puat Hosp before reaching 59009 Yishun Int.

SAFRA Yishun is a potential activity destination, but specific sports or leisure options can have membership eligibility, booking and admission conditions. Confirm the selected activity before departure. A bus stop outside a club is not an entry ticket or a promise that courts are available.

Khoo Teck Puat Hospital is an important healthcare destination, not a tourist attraction. If travelling for a clinic or authorised visit, follow hospital directions and appointment details, and allow for the final road crossing. A person who may be tired after treatment should prioritise a comfortable return rather than adding an unnecessary shopping stop.

At Yishun Interchange, the bus connects to the North South Line and the surrounding Northpoint City precinct. This is a practical endpoint for an ordinary meal or errand. Choose a specific shop, library or station entrance rather than saying that all Yishun attractions are directly at the interchange.

Don’t confuse Yishun Interchange with Sembawang Park or the Lower Seletar Reservoir shoreline. Those are separate destinations with other routes and last-mile walks. The full 103 service ends at Yishun town centre, not at a beach or reservoir.

Compare 103 with Services 102 and 117 without confusing their termini

Service 103 starts at Serangoon and ends at Yishun. Service 102 starts at Hougang and loops through Seletar, with a different road pattern. Service 117 begins at Punggol Coast, travels via Seletar Aerospace Park and Yishun/Canberra corridors, and finishes in Sembawang. These routes overlap the broad Seletar area but have different termini, stop orders and pedestrian approaches.

For a Punggol Coast resident, Bus 117 may require fewer preliminary transfers to reach some public Seletar locations. A person near Serangoon MRT may prefer Service 103. Someone living near Buangkok or Hougang should inspect which Service 102 stop serves the actual destination. There is no single best route without specifying the origin and venue entrance.

Likewise, ‘Seletar Airport’ and ‘The Oval’ are different points in the wider aerospace estate. A bus serving the word Seletar does not guarantee that the desired building is at its next stop. Choose the exact visit first, then compare services.

Fares and travel times depend on the trip and real operating conditions. For a time-critical appointment, use live arrivals and a margin rather than publishing an exact duration for everyone.

Even for a leisurely heritage afternoon, check the return stop and intended direction before exploring. A correct service number in the wrong direction can result in a long detour through the rest of the estate.

Three suggested outings, each with a manageable plan

Jalan Kayu food and old-street observation

From Serangoon Interchange, take full SBS 103 towards Yishun, alight at 68031 Jln Kayu Shophouse, select an operating public eatery, then examine a short length of the historic street from public footpaths. Confirm the return-side stop and traffic crossings before ending the visit.

Seletar public heritage or wetland visit

Choose a specific JTC public destination near The Oval or Hampstead Wetlands Park. Map the exact public entrance from the nearest appropriate 103 stop, carry water and keep away from secure aviation grounds. The outing is about one permitted place, not every workplace along West Camp Road.

Yishun activity or rail-transfer day

Travel through Seletar to Yishun Interchange 59009 for a meal or North South Line connection, or alight at SAFRA Yishun only for a confirmed available activity. Use the Yishun-to-Serangoon service or rail for the return.

Problems to avoid and how to repair the journey

• Wrong starting town: 103 begins at Serangoon Int, not Punggol or Hougang Interchange.
• Confusing Seletar with Changi Airport: the bus serves a working aerospace estate and does not go to Changi passenger terminals.
• Private aviation facilities: a named workplace stop is not permission to enter hangars, airfields or flying-club premises.
• Hampstead access: map the public entrance and last-mile route; no 103 stop is literally a wetlands entrance.
• Unknown restaurant hours: verify a Jalan Kayu outlet rather than promising a dish or opening time.
• SAFRA admission: activity, membership or booking requirements are separate from bus service.
• Hospital access: use the correct clinic and pedestrian entrance; do not turn the hospital into a leisure stop.
• Reverse trip: compare the Yishun-to-Serangoon stop list rather than reusing the outbound Seletar stop code.

Frequently asked questions

Where does Bus 103 go?

Between Serangoon Interchange and Yishun Interchange via Jalan Kayu and Seletar Aerospace Park.

Does Bus 103 go to Jalan Kayu shophouses?

Yes, 68031 Jln Kayu Shophouse is on the Serangoon-to-Yishun route.

Can Bus 103 reach The Oval?

It serves Seletar Aerospace Park; check the exact JTC public attraction and the walk from an appropriate stop.

Can I take Bus 103 to Hampstead Wetlands Park?

The bus reaches the wider Seletar district, but the park entrance must be mapped separately from the nearest stop.

Does 103 stop at Seletar Airport?

It serves Seletar Aerospace Drive and West Camp Road stops; this does not automatically mean direct public airport-terminal access.

Is Bus 103 a direct route to Changi Airport?

No. It is a Serangoon–Yishun service via Seletar.

Does it go to Yishun MRT?

It finishes at Yishun Bus Interchange near the North South Line.

Does 103 serve Khoo Teck Puat Hospital?

It has 59349 Opp Khoo Teck Puat Hosp, with a separately verified pedestrian connection.

Does 103 go to SAFRA Yishun?

It serves 59709 Bef SAFRA Yishun; check current activity booking and eligibility.

Is Bus 103 the same as 102?

No. 102 originates at Hougang and loops through a different Seletar section, while 103 connects Serangoon and Yishun.

Can I access airfield premises from the bus?

Not without the operator’s or facility’s authorisation; stay on public land.

How do I return from Seletar?

Find the correct stop in the Yishun-to-Serangoon direction and check real-time arrivals before walking away from the public attraction.

Primary sources and other Singapore bus guides

• SBS Transit: Bus 103 Serangoon-to-Yishun complete route
• SBS Transit: Bus 103 Yishun-to-Serangoon direction
• SimplyGo Bus 103 route and timings
• JTC Seletar Aerospace Park public attractions and heritage
• NParks: Hampstead Wetlands Park visitor information
• SG101: Jalan Kayu historical shophouses and community

Bus 102: Hougang to Seletar Aerospace Park, Bus 117: Punggol Coast via Seletar to Sembawang, and Bus 3: Punggol to Downtown East and Tampines cover different routes and destinations.

Checked on 1 November 2026: This is an independent practical guide using published operator and venue information, not a live arrival service. Routes, stopping arrangements, public access, business opening hours and park works may change. Read the current destination display and official venue guidance before travelling.