A21 Bus Hong Kong
A21 bus is the most frequently used bus to/from Hong Kong Airport. After leaving the airport, it first makes a detour to Hong Kong Port of Hong Kong – Zhuhai – Macao Bridge and then goes directly to Hung Hom, passing through hot spots like Tsim Sha Tsui, Jordan, Yau Ma Tei, and Mong Kok, with the whole journey of 40 kilometers (25 miles). It takes about 80 minutes to finish the whole trip and costs HKD 34.6.
Those double-decked air-conditioned buses are usually equipped with large racks and LED displays showing the next stops as well as the estimated duration, which make you enjoy the bus trip as much as possible.
Hong Kong Port of Hong Kong-Zhuhai-Macao Bridge: HZMG Passenger Clearance Building
Lantau Link Bus-Bus Interchange: Airport Bus Transfer Hub, Viewing Platform of Tsing Ma Bridge
Hoi Lai Estate, Sham Mong Road: Aqua Marine Club House, Hoi Lai Street, Hoi Lai Shopping Centre
Hoi Tat Estate, Sham Mong Road: Hoi Tat Estate Hoi Shing House, Ying Wa College
Nam Cheong Station, Sham Mong Road: MTR Nam Cheong Station, Yen Chow Street West
AquaMarine, Sham Mong Road/ Nam Cheong Park, Sham Mong Road: Hoi Lai Shopping Centre, Sham Shui Po Government Primary School
Hoi Tak Court, Sham Mong Road/ Chui Yu Road, Sham Mong Road: Hoi Tak Court, Sham Mong Road Playground, Ying Wa College, Hoi Tat Estate
The Long Beach, Hoi Fai Road: Victoria Harbour, The Long Beach Club House, Olympian City Promenade Park
Ming Kei College, Cherry Street: Cherry Street Park, Sharon Lutheran School, The Church of Christ in China Ming Kei College
Metropark Hotel Mongkok, Lai Chi Kok Road: Metropark Hotel Mongkok, Golden Plaza, MTR Prince Edward Station
Argyle Centre, Nathan Road/ Yau Tsim Mong District Health Centre, Argyle Street: Mong Kok New Town Mall, Argyle Centre, Shanghai Commercial Bank Building, MTR Mong Kok Station (Exit A1, A2, B1, B2)
Bank Centre, Nathan Road/ Grand Plaza, Nathan Road: Cordis Hong Kong, Langham Place, Nelson Street, MTR Mong Kok Station (Exit E1, E2), Grand Tower, HSBC Building Mangkok, Chunkiu Commercial Building
Sino Centre, Nathan Road/ Changsha Street, Nathan Road: Ladies' Market, Chong Hing Square Market, Sino Centre, Mong Kok Plaza
Man Ming Lane, Nathan Road/ Pitt Street, Nathan Road: MTR Yau Ma Tei Station, Jade Mansion, Lai Kee Mansion, Tai Wo Commercial Building, Yau Ma Tei Fire Station, Casa Hotel
Nathan Hotel, Nathan Road/ Public Square Street, Nathan Road: Nathan Hotel, Saigon Street, Wing On Kowloon Centre, Eaton Hong Kong, Cheung Wah Commercial Building, Astor Plaza Garden, Hang Shing Building
Prudential Centre, Nathan Road/ Ning Po Street, Nathan Road: MTR Jordan Station, Prudential Hotel, Hong Kong Health Check Tower, JD Mall, Pearl Oriental Tower, Four Seas Building, Chuang's London Plaza
Tsim Sha Tsui Police Station, Nathan Road: Tsim Sha Tsui Police Station, Bowa House, Hillwood Road, Pacific Mansion, St. Andrew's Church, Chuang's London Plaza
Kimberley Road, Nathan Road: Harbour City, Chinese Garden, St. Andrew's Church, Milton Mansion, Park Lane Shopper's Boulevard
Cameron Road, Nathan Road: MTR Tsim Sha Tsui Station (Exit B1, B2), Manson House, Comfort Building, The One, Kowloon Mosque and Islamic Centre
Middle Road, Nathan Road/ Haiphong Road, Nathan Road: The Peninsula Hong Kong, Sheraton Hong Kong Hotel & Towers, Holiday Inn Golden Mile, MTR East Tsim Sha Tsui Station (Exit L1, L3, L4)
East Tsim Sha Tsui Station, Salisbury Road: MTR East Tsim Sha Tsui Station, Victoria Dockside, K11 Atelier, Signal Hill Garden, Sheraton Hong Kong Hotel & Towers, Regent Hong Kong
Mody Road, Chatham Road South: Railway Plaza, Urban Council Centenary Garden, Hart Avenue, Union Mansion, Hart House, Auto Plaza
Granville Road, Chatham Road South (Suspended): Park Hotel Hong Kong, Best Western Plus Hotel Kowloon, Urban Council Centenary Garden, Oriental Centre, Wai Wah Building
Hong Kong Science Museum, Chatham Road South: Hong Kong Science Museum, Hong Kong History Museum, Golden Mansion, South Sea Apartments, Oriental Crystal Finance Centre
Hung Hom Station: MTR Hung Hom Station, Hong Kong Coliseum, The Hong Kong Polytechnic University
1. Special racks are set on the first floor for large-size baggage. On the second floor, you can track your luggage via the display screen. Remember to pick it up several minutes before getting off in case you’re in a hurry.
2. Seats on F2 provide a better view for sightseeing during the ride.
3. Follow the real-time route on the display screen, and it would be best to press the Stop button when the bus approaches your destination, as it doesn’t stop at all stations. The button can be found beside or above each seat.
NA21 provides overnight supplementary services for A21, available at 00:40 – 04:40 daily, with a headway of 30 mins, and a flat fare of HKD 39.3. With fewer stops along the whole trip, it starts/ ends at the Hong Kong-Zhuhai-Macao Bridge Hong Kong Port, and loops back and forth between Hong Kong Airport - Mong Kok/ Tai Kok Tsui areas.
Kind Reminder:
N21 and N21A are two other night city buses with a similar number but different routes from NA21, so please check twice before getting on board.
N21 and N21A follow the same route, serving between Tsim Sha Tsui (Star Ferry) and the airport from 00:10 to 5:10, with a duration of 1h20m and a fare of HKD 23.8 for a single trip.
Those double-decked air-conditioned buses are usually equipped with large racks and LED displays showing the next stops as well as the estimated duration, which make you enjoy the bus trip as much as possible.
A21 Bus Routes & Surroundings
Routes in Both Directions
| Area | Airport ↓ Hung Hom Station | Airport ↑ Hung Hom Station |
|---|---|---|
| Airport | Airport (Ground Transportation Centre) | Airport (Ground Transportation Centre) |
| Hong Kong Port of Hong Kong-Zhuhai-Macao Bridge | HZMB Passenger Clearance Building (For alighting only) | |
| / | Airport, Terminal 2 (For alighting only) | |
| / | Airport, Terminal 1 (For alighting only) | |
| Lantau Link Bus-Bus Interchange | Lantau Link Bus-Bus Interchange | |
| Sham Shui Po | / | Hoi Lai Estate, Sham Mong Road |
| / | Hoi Tat Estate, Sham Mong Road | |
| / | Nam Cheong Station, Sham Mong Road | |
| AquaMarine, Sham Mong Road | Nam Cheong Park, Sham Mong Road | |
| Hoi Tak Court, Sham Mong Road | Chui Yu Road, Sham Mong Road | |
| Tai Kok Tsui | / | The Long Beach, Hoi Fai Road |
| / | Ming Kei College, Cherry Street | |
| Mong Kok | Metropark Hotel Mongkok, Lai Chi Kok Road | / |
| Argyle Centre, Nathan Road | Yau Tsim Mong District Health Centre, Argyle Street | |
| Bank Centre, Nathan Road | Grand Plaza, Nathan Road | |
| Sino Centre, Nathan Road | Changsha Street, Nathan Road | |
| Yau Ma Tei | Man Ming Lane, Nathan Road | Pitt Street, Nathan Road |
| Nathan Hotel, Nathan Road | Public Square Street, Nathan Road | |
| Jordan | Prudential Centre, Nathan Road | Ning Po Street, Nathan Road |
| Tsim Sha Tsui | / | Tsim Sha Tsui Police Station, Nathan Road |
| Kimberley Road, Nathan Road | Kimberley Road, Nathan Road | |
| Cameron Road, Nathan Road | / | |
| Middle Road, Nathan Road | Haiphong Road, Nathan Road | |
| Tsim Sha Tsui East | East Tsim Sha Tsui Station, Salisbury Road | East Tsim Sha Tsui Station, Salisbury Road |
| Mody Road, Chatham Road South | Mody Road, Chatham Road South | |
| Granville Road, Chatham Road South (Suspended) | / | |
| Hong Kong Science Museum, Chatham Road South | Hong Kong Science Museum, Chatham Road South | |
| Hung Hom | Hung Hom Station | Hung Hom Station |
Surroundings of Main Stops of A21
Hong Kong Port of Hong Kong-Zhuhai-Macao Bridge: HZMG Passenger Clearance Building Lantau Link Bus-Bus Interchange: Airport Bus Transfer Hub, Viewing Platform of Tsing Ma Bridge Hoi Lai Estate, Sham Mong Road: Aqua Marine Club House, Hoi Lai Street, Hoi Lai Shopping Centre |
| Running Route of Bus A21 |
Hoi Tat Estate, Sham Mong Road: Hoi Tat Estate Hoi Shing House, Ying Wa College Nam Cheong Station, Sham Mong Road: MTR Nam Cheong Station, Yen Chow Street West AquaMarine, Sham Mong Road/ Nam Cheong Park, Sham Mong Road: Hoi Lai Shopping Centre, Sham Shui Po Government Primary School Hoi Tak Court, Sham Mong Road/ Chui Yu Road, Sham Mong Road: Hoi Tak Court, Sham Mong Road Playground, Ying Wa College, Hoi Tat Estate The Long Beach, Hoi Fai Road: Victoria Harbour, The Long Beach Club House, Olympian City Promenade Park Ming Kei College, Cherry Street: Cherry Street Park, Sharon Lutheran School, The Church of Christ in China Ming Kei College Metropark Hotel Mongkok, Lai Chi Kok Road: Metropark Hotel Mongkok, Golden Plaza, MTR Prince Edward Station Argyle Centre, Nathan Road/ Yau Tsim Mong District Health Centre, Argyle Street: Mong Kok New Town Mall, Argyle Centre, Shanghai Commercial Bank Building, MTR Mong Kok Station (Exit A1, A2, B1, B2) Bank Centre, Nathan Road/ Grand Plaza, Nathan Road: Cordis Hong Kong, Langham Place, Nelson Street, MTR Mong Kok Station (Exit E1, E2), Grand Tower, HSBC Building Mangkok, Chunkiu Commercial Building Sino Centre, Nathan Road/ Changsha Street, Nathan Road: Ladies' Market, Chong Hing Square Market, Sino Centre, Mong Kok Plaza Man Ming Lane, Nathan Road/ Pitt Street, Nathan Road: MTR Yau Ma Tei Station, Jade Mansion, Lai Kee Mansion, Tai Wo Commercial Building, Yau Ma Tei Fire Station, Casa Hotel Nathan Hotel, Nathan Road/ Public Square Street, Nathan Road: Nathan Hotel, Saigon Street, Wing On Kowloon Centre, Eaton Hong Kong, Cheung Wah Commercial Building, Astor Plaza Garden, Hang Shing Building Prudential Centre, Nathan Road/ Ning Po Street, Nathan Road: MTR Jordan Station, Prudential Hotel, Hong Kong Health Check Tower, JD Mall, Pearl Oriental Tower, Four Seas Building, Chuang's London Plaza Tsim Sha Tsui Police Station, Nathan Road: Tsim Sha Tsui Police Station, Bowa House, Hillwood Road, Pacific Mansion, St. Andrew's Church, Chuang's London Plaza Kimberley Road, Nathan Road: Harbour City, Chinese Garden, St. Andrew's Church, Milton Mansion, Park Lane Shopper's Boulevard Cameron Road, Nathan Road: MTR Tsim Sha Tsui Station (Exit B1, B2), Manson House, Comfort Building, The One, Kowloon Mosque and Islamic Centre Middle Road, Nathan Road/ Haiphong Road, Nathan Road: The Peninsula Hong Kong, Sheraton Hong Kong Hotel & Towers, Holiday Inn Golden Mile, MTR East Tsim Sha Tsui Station (Exit L1, L3, L4) East Tsim Sha Tsui Station, Salisbury Road: MTR East Tsim Sha Tsui Station, Victoria Dockside, K11 Atelier, Signal Hill Garden, Sheraton Hong Kong Hotel & Towers, Regent Hong Kong Mody Road, Chatham Road South: Railway Plaza, Urban Council Centenary Garden, Hart Avenue, Union Mansion, Hart House, Auto Plaza Granville Road, Chatham Road South (Suspended): Park Hotel Hong Kong, Best Western Plus Hotel Kowloon, Urban Council Centenary Garden, Oriental Centre, Wai Wah Building Hong Kong Science Museum, Chatham Road South: Hong Kong Science Museum, Hong Kong History Museum, Golden Mansion, South Sea Apartments, Oriental Crystal Finance Centre Hung Hom Station: MTR Hung Hom Station, Hong Kong Coliseum, The Hong Kong Polytechnic UniversityA21 Airport Bus Schedule & Frequency
A21 Bus operates every day from 05:15-00:00.
Timetable for A21 from Airport to Hung Hom
| Monday to Friday | Saturday | Sunday & Public Holidays | Interval (min) |
|---|---|---|---|
| 05:30 - 08:00 | 05:30 - 08:00 | 05:30 - 08:00 | 30 |
| 08:00 - 09:00 | 08:00 - 09:00 | 08:00 - 08:40 | 20 |
| 09:00 - 09:30 | 09:00 - 09:30 | 08:40 - 09:10 | 15 |
| 09:30 - 10:06 | 09:30 - 10:18 | / | 12 |
| 10:06 - 10:26 | 10:18 - 10:58 | 09:10 - 18:00 | 10 |
| 10:26 - 12:50 | 10:58 - 12:18 | / | 8 |
| 12:50 - 17:00 | 12:18 - 18:48 | / | 10 |
| 17:00 - 22:00 | 18:48 - 22:00 | 18:00 - 00:00 | 12 |
| / | 22:00 - 00:00 | / | 15 |
| 22:00 - 00:00 | / | / | 20 |
Timetable for A21 from Hung Hom to Airport
| Monday to Friday | Saturday | Sunday & Public Holidays | Interval (min) |
|---|---|---|---|
| 05:15 - 06:15 | 05:15 - 06:15 | 05:15 - 06:15 | 12 |
| 06:15 - 08:00 | 06:15 - 08:00 | 06:15 - 08:00 | 15 |
| 08:00 - 12:00 | 08:00 - 11:00 | 08:00 - 10:00 | 12 |
| 12:00 - 17:00 | 11:00 - 18:00 | 10:00 - 17:00 | 10 |
| 17:00 - 20:00 | 18:00 - 21:00 | 17:00 - 21:00 | 12 |
| 20:00 - 21:00 | 21:00 - 22:00 | 21:00 - 22:00 | 15 |
| 21:00 - 23:00 | 22:00 - 23:00 | 22:00 - 23:00 | 20 |
| 23:00 - 00:00 | 23:00 - 00:00 | 23:00 - 00:00 | 30 |
A21 Airport Bus Fare
Flat Fare: HKD 34.6
Passengers using the same payment tool for a round-trip on A21 enjoy a 50% discount for the return journey within the same day, that is HKD 17.3.
How to Pay Bus Fare? - 4 Ways
Switch your location in Alipay or WeChat to HK and get a transit code, which can be conveniently used to pay for the bus. To note that one code is applicable for one passenger only.
Paper Ticket or Octopus Card
You can also buy a ticket or an Octopus card in advance at the Customer Service Centre at the Airport Ground Transportation Centre or at MTR Hung Hom Station. Paper tickets need to be recycled.
Visa/Mastercard
Swipe the card with the contactless payment function to ride the bus directly.
Cash
Prepare HKD 34.6 in cash in advance. Change is not available on board.
Tips on Taking A21 Bus
2. Seats on F2 provide a better view for sightseeing during the ride.
3. Follow the real-time route on the display screen, and it would be best to press the Stop button when the bus approaches your destination, as it doesn’t stop at all stations. The button can be found beside or above each seat.
NA21: Circular Line Serving at night
| Area | Main Bus Stops | Surroundings |
|---|---|---|
| Airport | HK-Zhuhai-Macao Bridge Hong Kong Port | HZMB Passenger Clearance Building |
| Airport (Ground Transportation Centre) | Bus Terminus | |
| Cathay Pacific City, Chun Ming Road | Airline Store Building, Cathay City, Cathay Pacific Airway Flight Training Centre | |
| Lantau Link Bus-Bus Interchange | Lantau Toll Plaza Administration Building, Tsing Ma Bridge Viewing Platform | |
| Mong Kok | Sai Yeung Choi Street South | Yau Shing Building, Epoch Hotel, 700 Nathan Road, Mong Kok New Town Mall, Argyle Centre, Shanghai Commercial Bank Building |
| Yau Tsim Mong District Health Centre, Argyle Street | Yau Tsim Mong District Health Centre, Sun Fung House, Tak Lee Mansion, Chun Hing Building, Kai Yue Commercial Building | |
| Ming Kei College, Cherry Street | The Church of Christ in China Ming Kei College, Sharon Lutheran School, Cherry Street Park, Tai Kok Tsui Building | |
| The Long Beach, Hoi Fai Road | Victoria Harbour, Island Harbour View, Bank of China Centre, Olympian City Promenade Park | |
| Lantau Link Bus-Bus Interchange | Lantau Toll Plaza Administration Building | |
| Airport | Cathay Pacific City, Scenic Road | Airline Store Building, Cathay City, Cathay Pacific Airways Flight Training Centre |
| Airport Terminal 1 (For alighting only) | Terminal 1 of HKIA | |
| Airport Terminal 2 (For alighting only) | Terminal 2 of HKIA | |
| HZMB Passenger Clearance Building (For alighting only) | HZMB Passenger Clearance Building | |
| HK-Zhuhai-Macao Bridge Hong Kong Port | HZMB Passenger Clearance Building |
Kind Reminder: N21 and N21A are two other night city buses with a similar number but different routes from NA21, so please check twice before getting on board.
N21 and N21A follow the same route, serving between Tsim Sha Tsui (Star Ferry) and the airport from 00:10 to 5:10, with a duration of 1h20m and a fare of HKD 23.8 for a single trip.
- Last updated on Aug. 03, 2026 by Grace Yang -