Hong Kong A21 Airport Bus Guide (2026)
The A21 airport bus links Hong Kong International Airport with areas of Kowloon, including the Nathan Road corridor. Use it when its stop is close to your hotel and the service time suits your flight.
Where do you board?
At the airport, follow signs for public buses after arrivals. Find the A21 bay and read the direction shown at the stop.
For the return, use an airport-bound stop on the correct side of the road. The stop where you arrived may not be the one you need to leave.
What fare and service details matter?
Citybus sets the current fare, service hours and accepted payment methods. Read its live route details for your travel date before relying on an old screenshot.
Keep a usable payment method ready. If traveling with large bags, read the posted luggage guidance and keep aisles clear.
Which stop serves your hotel?
A21 follows a Kowloon corridor that includes Mong Kok, Yau Ma Tei and Tsim Sha Tsui areas. Stop patterns can change, so match the exact stop name to your hotel map.
A short bus ride can still end in a difficult luggage walk. Check the road crossing and hotel entrance, especially for a late arrival.
When should you choose another ride?
A21 can suit a hotel near its stop and a traveler comfortable with a bus. Add waiting time, road traffic and the final walk to your estimate.
For a tight commitment or heavy luggage, compare the Airport Express, another bus or a licensed taxi. A night arrival needs its own service-time check.
What mistakes are common?
Do not assume the route number alone identifies your boarding direction. Check A21 plus destination on the stop sign.
Do not use an old fare or schedule as today’s rule. Check the operator’s current listing before leaving the terminal.
FAQ: What do visitors ask?
Does A21 go to Tsim Sha Tsui?
The route has served that area, but stops can change. Match your hotel with the current Citybus stop list.
Can I bring a suitcase?
Airport buses are designed for travelers. Follow the posted luggage limits and keep bags in the designated area.
Is it always cheaper than the train?
Compare the current fare for your group and final destination. The train may need a further transfer.
