Blue Flag Boat, better known as Chao Phraya Tourist Boat, is a public boat service on the Chao Phraya River in Bangkok. It is a very useful means of transportation in Bangkok allowing tourists to explore the riverside in the central part of the city, where a big part of Bangkok's top attractions can be found. Discover the Bangkok Blue Flag Boat route map, tickets, and the latest timetable of the Chao Phraya Tourist Boat.
Blue Flag Boat, operated by Chao Phraya Express Boat, is a Bangkok tourist boat service running from Phra Arthit Pier to Sathorn Pier and Asiatique Pier (in later hours only). The boat route connects the touristy district of Khao San Road and BTS Saphan Taksin Station with famous attractions along the Chao Phraya River, such as the Grand Palace and Wat Phra Kaew, Wat Pho, Wat Arun, Chinatown, ICONSIAM, and Asiatique the Riverfront.
The most convenient way of traveling on this boat is with a Chao Phraya Tourist Boat Day Pass. The ticket allows unlimited traveling between the most popular attractions in the city and saves lots of time.
Chao Phraya Tourist Boat Route Map
The map of Chao Phraya Tourist Boat route with all the stops along the route and other boat services available at each pier, where the Bangkok Blue Flag Boat makes a stop.
The full Chao Phraya River pier map can be found here: Bangkok River Pier Map.
Blur Flag Boat Ticket Price
The Blue Flag - Chao Phraya Tourist Boat ticket price is 150 THB for a one-day pass or 40 THB for a single trip.
If you are planning to use the tourist boat several times a day, get a Chao Phraya Tourist Boat Day Pass. The ticket allows unlimited traveling between the most popular attractions in the city and saves lots of time that would be wasted each time for buying separate single-trip tickets.
Ticket Counters
Boat tickets can be purchased at the desk of Chao Phraya Tourist Boat found at the passenger piers along the route. At the main piers, such as ICONSIAM Pier, you can find a ticket counter like seen below (check for the sign "Tourist Boat", "Blue Flag", or "Hop-on Hop-off").
Bangkok Blue Flag Boat Schedule
Blue Flag - Chao Phraya Tourist Boat operates daily with the same schedule applied on weekdays and weekends. Boat departures are scheduled from 08:30 to 19:45, with a frequency of approximately every 30 minutes.
The journey by the Blue Flag Boat between Sathorn Pier and Phra Arthit Pier takes about 30 minutes. The trip on the extended route from Phra Arthit to Asiatique takes about 40 minutes.
The timetable was updated in December 2025, with the boat operating hours extended by 30 minutes. After the change, the last boat from Phra Arthit Pier departs at 19:00 instead of 18:30.
Currently, the route extension to Asiatique starts with the boat departing from Phra Arthit at 11:30 (previously was 16:00). The first Blue Flag Boat at Asiatique Pier now is available at 12:00 (noon).
For a detailed boat departure schedule, check out the Blue Flag Boat timetable below.
Departures from Phra Arthit Pier (Khao San Road)
The Blue Flag Boat departures from Phra Arthit to Sathorn Pier in Bangkok are scheduled daily from 08:30 to 19:00 and are the following:
- 08:30
- 09:00, 09:30
- 10:00, 10:30
- 11:00, 11:30*
- 12:00*, 12:30*
- 13:00*, 13:30*
- 14:00*, 14:30*
- 15:00*, 15:30*
- 16:00*, 16:20*
- 17:00*, 17:30*
- 18:00*, 18:30*
- 19:00*
*Boats departing from 11:30 to 19:00 extend their route to Asiatique Pier.
Departures from Sathorn Pier (BTS Saphan Taksin)
The Blue Flag boats depart from Sathorn Pier to Phra Arthit daily from 09:00 to 19:45. The scheduled boat departures are the following:
- 09:00, 09:30
- 10:00, 10:30
- 11:00, 11:30
- 12:15*, 12:45*
- 13:15*, 13:45*
- 14:15*, 14:45*
- 15:15*, 15:45*
- 16:15*, 16:45*
- 17:05*, 17:45*
- 18:15*, 18:45*
- 19:15*, 19:45*
*From 12:00 to 19:30, boats depart from Asiatique around 15 minutes earlier than the indicated time.
Departures from Asiatique Pier
After the latest schedule update, the Blue Flag boats depart from Asiatique Pier to Phra Arthit at the following times:
- 12:00, 12:30
- 13:00, 13:30
- 14:00, 14:30
- 15:00, 15:30
- 16:00, 16:30
- 17:00, 17:30
- 18:00, 18:30
- 19:00, 19:30
*The Blue Flag Boat route now is extended to Asiatique earlier.
Chao Phraya Express Boat Routes
There are 5 Chao Phraya Express Boat routes operating on the Chao Phraya River in Bangkok:
- Blue Flag
- Orange Flag
- Yellow Flag
- Green Yellow Flag
- Red Flag
Orange Flag Boat is the most affordable Chao Phraya Express Boat service, running between Nonthaburi Pier (N30) and Wat Rajsingkorn Pier (S3). The Orange Flag boat costs less and is a good alternative to the pricier tourist boat.
Yellow Flag Boat is the express service running from Nonthaburi Pier (N30) to Sathorn Pier (Central). Previously, these boats were operating during rush hour only. However, now they also operate at the daytime, when they change the Orange Flag Boat, with several additional stops made along the route.
Green Yellow Flag Boat is the longest route, connecting Pakkret Pier (N33) with Sathorn Pier (Central). These boats are even less frequent than Yellow Flag boats and operate on weekdays and during rush hour only.
Red Flag Boat is an express route from Nonthaburi Pier (N30) to Sathorn Pier (Central) running on weekdays, during the morning rush hour, and in one direction only.
Bangkok Boat Travel Tips
The air-conditioned Thai Smile Boat is a good alternative for travelers looking for a more comfortable and environmentally friendly service to explore the Chao Phraya River. If you will be using the electric boat and the electric bus of the same company (Thai Smile Bus) several times a day, consider getting a Thai Go Day Pass, which allows unlimited traveling on 3 boat routes and all Thai Smile Bus routes for 1, 2, or 3 days.
As traffic in the city center is often jammed, public boats can be used as a reliable way to get to the most popular Bangkok river cruise departure points on time.