Yellow Flag Boat by Chao Phraya Express Boat

Yellow Flag Boat by Chao Phraya Express Boat is a public boat service operating along the Chao Phraya River in Bangkok. It is a very useful means of public transportation in Bangkok allowing travelers to commute in the central part of the city during the daytime, when the Yellow Flag changes the more popular Orange Flag Boat. Discover the Bangkok Yellow Flag Boat route map, tickets, and the latest timetable.

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.

In case you are looking for the most convenient way to travel on the Chao Phraya River, 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.

Bangkok Yellow Flag Boat Route Map

The map of the Bangkok Yellow Flag Boat route with all the stops along the route and other boat services available at each pier.

Yellow Flag Boat

Yellow Flag Boat (daytime)

If you have no plans to explore the suburbs of the Thai capital city, you can skip to the piers in central Bangkok.

The full Chao Phraya River pier map can be found here: Bangkok River Pier Map.

Bangkok Yellow Flag Boat Ticket Price

Starting from 1 May 2026, the Yellow Flag Boat ticket price is 23 THB per person for a single trip of any distance.

If you prefer comfort and don't mind paying a little bit more, 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.

Ticket Counters

Boat tickets can be purchased at the desk of Chao Phraya Express Boat found at the passenger piers along the route. At the main piers, such as Sathorn Pier, you can find a ticket counter like seen below.

If there is no ticket desk at the pier, you can normally buy a ticket on board the boat.

Bangkok Yellow Flag Boat Schedule

The original Yellow Flag Boat operates Monday–Friday from 06:00 to 08:05 in the morning and from 17:15 to 19:05 in the evening, with a frequency of every 15 to 60 minutes during the hours of operation. 

Starting from 30 March 2026, the daytime Yellow Flag Boat operates from 08:10 to 15:40 on weekdays and from 07:30 to 17:45 on weekends and public holidays (with additional stops during these hours).

For a detailed boat departure schedule, check out the Yellow Flag Boat timetable below.

Original Route Nonthaburi-Sathorn

Monday-Friday:

• From Nonthaburi: 06:00, 06:20, 06:40, 07:00, 07:15, 07:45, 08:05
• From Sathorn: 17:15, 17:35, 18:00, 18:20, 18:40, 19:05

Extended Route Nonthaburi-Wat Rajsingkorn

Monday-Friday:

• From Nonthaburi: 08:10, 08:40, 09:10, 09:40, 10:10, 10:40, 11:00, 11:20, 11:40, 12:10, 12:40, 13:10, 13:40, 14:10, 14:40, 15:10, 15:40
• From Wat Rajsingkorn: 08:10, 08:40, 09:10, 09:40, 10:10, 10:40, 11:00, 11:20, 11:40, 12:10, 12:40, 13:10, 13:40, 14:00, 14:20, 14:40, 15:00, 15:20

Saturday & public holidays:

• From Nonthaburi: 07:30, 08:00, 08:40, 09:20, 10:00, 10:40, 11:10, 11:40, 12:10, 12:40, 13:10, 13:40, 14:00, 14:20, 14:40, 15:00, 15:20, 15:45, 16:10, 16:40, 17:00
• From Wat Rajsingkorn: 08:40, 09:20, 10:00, 10:40, 11:10, 11:40, 12:10, 12:40, 13:10, 13:40, 14:10, 14:40, 15:00, 15:20, 15:40, 16:00, 16:20, 16:40, 17:00, 17:20, 17:45

Sunday:

• From Nonthaburi: 08:40, 09:20, 10:00, 10:40, 11:10, 11:40, 12:10, 12:40, 13:10, 13:40, 14:00, 14:20, 14:40, 15:00, 15:20, 15:45, 16:10, 16:35, 17:00
• From Wat Rajsingkorn: 09:40, 10:20, 11:00, 11:40, 12:10, 12:40, 13:10, 13:40, 14:10, 14:40, 15:00, 15:20, 15:40, 16:00, 16:20, 16:40, 17:00, 17:20, 17:45

Other 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

Blue Flag Boat, better known as Chao Phraya Tourist Boat, is a tourist boat service running from Phra Arthit Pier to Sathorn Pier and Asiatique Pier (in later hours only). This boat route connects the touristy district of Khao San Road 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.

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.

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.