₹90–₹130 gets you from TRV airport side to Kollam
KSRTC Fast Passenger buses to Kollam run along NH66 near Thiruvananthapuram International Airport, not inside T1 or T2, so you usually walk 5–10 minutes to the airport junction bus stop. These are regular red-and-cream state buses doing the Thiruvananthapuram–Kollam intercity run, and the ride takes roughly 60–90 minutes depending on traffic at Kazhakkoottam and Attingal. Think of this as the super-budget option that skips a taxi to Thampanoor and a second bus.
Fares on this stretch sit in local intercity range, typically under ₹150 per person between TRV area and Kollam, compared with ₹1,800–₹2,500 for an airport taxi quoted on recent Kerala travel forums. Payment is on board in cash to the conductor; there’s no prepaid counter at the terminal, and no online reservation for these passing services. Buses are standard KSRTC Fast Passenger spec: basic seats, open windows or ceiling fans, and no air-conditioning on most runs.
Frequency is the catch: Kollam-bound Fast Passenger buses that actually pass the airport junction might show up only every 45–90 minutes outside peak commuting times, while city buses into Thampanoor leave the airport road roughly every 10–15 minutes. Miss one Fast Passenger and you may end up waiting long enough that a quick hop to Thiruvananthapuram KSRTC bus station plus a second bus is actually faster door to door.
Luggage handling is another trade-off. These intercity buses have no underfloor bays; most passengers slide small bags under the 2+2 seats or park a cabin-size suitcase in the aisle. Large 23 kg hard-shell bags for two people quickly clog the narrow aisle, and on a full evening departure to Kollam you might find yourself standing 20–30 minutes with your bag pressed against the front steps or rear door.
Regulars often ride a local bus 6–8 km from T1/T2 to Thampanoor (East Fort) first, then grab one of the frequent Fast Passenger or Superfast services to Kollam that depart every 15–30 minutes from the main KSRTC stand. Some commuters in Kerala use crowd-sourced tracking apps and WhatsApp groups to see when the next Kollam bus is approaching the Chacka or airport junction stop and time their walk from the terminal accordingly.
Practical tip: If you land after 20:30 and need Kollam the same night, walk to NH66, wait 20 minutes, then bail to a city bus for Thampanoor if no Kollam Fast Passenger has appeared.