Boats & ferries in Bangkok: what they really cost, and which number is out of date.

Why the water is a real shortcut, and where it isn't

The Chao Phraya River runs north–south through the middle of Bangkok and the Khlong Saen Saep canal cuts east–west across the congested centre. Those are two straight lines through a city where the roads are not straight and frequently are not moving. Where the water goes where you are going, it wins outright at rush hour, and it reaches the riverside Old Town, Wat Arun and parts of Chinatown faster than the road does.

Where it loses is worth stating just as plainly. Boats run fixed routes on fixed hours, most of them stop well before the trains do, and the walk from pier to destination can be longer than the boat ride. They are a complement to the BTS and MRT, not a substitute, and the sensible pattern is a boat in the middle with a short Grab or motorbike-taxi hop at each end.

The four flag lines, and what each one costs

Every figure in this table was read on 7 September 2026 from Chao Phraya Express Boat Co., Ltd.’s own routes-and-schedules page, which is headed “Boat schedule — from 24 June 2026 onwards”. It is not an aggregator’s number and not a guidebook’s. Amounts are baht per person.

Three things that table will not tell you on its own. The flag is a stopping pattern, not a class. Orange is the workhorse and stops at most main piers; green-yellow and yellow skip piers to run faster over longer distances; red is the newest boat, air-conditioned, on the fewest calls. Get on the wrong one and it sails past your pier.

The red line’s 32 baht is a discounted price by the operator’s own admission — it prints “normal price 50” alongside it. Those are the four air-conditioned catamarans it launched in 2020, the newest thing on the river, and the discount is not guaranteed to last.

The operator’s own page contradicts itself on days of service. The schedule heading says “Operating on Monday to Sunday and Public Holidays”, while each individual line block says Monday–Friday. We have printed what each line block says and flagged the conflict rather than picking one. The same page also carries a separate timetable for royal barge procession rehearsal days, when river services are altered — if your trip falls near a rehearsal, check before you travel — and a “Pier out of service” notice, which is the first thing to check if a pier you expect to use is closed for works.

Why the fare you read online is probably wrong

Bangkok boat fares moved twice in nine days in 2026, both times because of diesel, and the published record has not caught up evenly. Three different fare sets are in circulation right now, all of them from sources that look authoritative:

The chain is documented and dated. Krob Krua / Family Transport (2002) Co., Ltd., whose managing director is Chaowalit Methayaprapas, announced a 2-baht rise across all Saen Saep distance bands effective 30 March 2026, citing diesel at 38.94 baht a litre on 26 March and saying it would reassess on 6 April and cut fares again if fuel fell. Chao Phraya Express Boat Co., Ltd., managing director Lt Cmdr Charoenporn Charoentham, moved by the same 2 baht. On 2 April, with diesel reported at 44.29 baht a litre, both operators announced a second 2-baht rise from 7 April 2026.

Here is the honest part: the operator’s own timetable, dated later than all of that, still shows the March numbers. Either the April rise was reversed when diesel eased, or it never took effect, or the website was not updated. We could not settle it from any operator or government document, so the page prints the operator’s figure and tells you the number could be 2 baht higher at the conductor’s hand. The practical instruction is unchanged: carry small notes, and do not assume a number you read anywhere — here included — is this week’s number.

It also explains something that looks like a scam and is not. If a conductor asks for 18 when the government website told you 16, that is a stale official page, not a driver overcharging you. The same pattern shows up on Bangkok taxi meters, where official pages still print a 35-baht flagfall that became 40 in January 2023.

Thai Smile Boat: the electric fleet, and the card a foreigner cannot top up

The electric boats are a separate operator with a separate fare. Thai Smile Boat runs three colour-coded lines on the Chao Phraya, and a single journey is 30 baht regardless of distance — dearer than the orange flag for a couple of stops, better value the further north you go. Lines, hours and headways as the operator publishes them:

Read the Metro Line row twice before you plan around it. It is a rush-hour-only service on business days, in two narrow windows, and it does not exist at all in the middle of the day. That is a commuter shuttle, not a river service.

The payment detail matters more than any of this for a foreign resident. Thai Smile Boat takes cash at the pier desks and on board, sells a Thai Go day pass online in 1, 2 and 3-day versions that also covers all Thai Smile Bus routes, and runs a stored-value HOP card. The HOP card is the closest the water comes to a Rabbit card — and topping it up by QR requires a Thai bank account and the app. A visitor cannot use it. A newly arrived resident cannot use it until their Thai bank account is open, which is a project of its own. Until then, cash and the online day pass are the whole toolkit.

The operator does not publish the day-pass price on the pages we could read, so no figure for it appears here.

The blue tourist boat: a different company, and no published fare

The blue-flag Chao Phraya Tourist Boat is not a colour variant of the express boats — it is a separate company. By its own account the hop-on hop-off service was started by Chao Phraya Express Boat Co. in B.E. 2546 (2003) with advice and cooperation from BTS, then split off and formally opened as Chao Phraya Tourist Boat Co., Ltd. on 15 June B.E. 2555 (2012). It runs five boats — three catamarans carrying 190 passengers and two monohulls carrying 150 — with toilets, life jackets at every seat, CCTV and announced pier names.

Boats leave every 30 minutes and call at 11 piers: Sathorn (BTS Saphan Taksin, S6), ICONSIAM, Ratchawongse, Pakklong Taladd (Yodpiman), Wat Arun, Tha Tien, Tha Chang, Tha Maharaj, Prannok and Phra Arthit — with the route extended in the late afternoon to reach Asiatique. That pier list is the honest test of whether it suits you: it is a sightseeing circuit of the Old Town and the riverside malls, and it does not serve the northern commuter stretch at all.

No price for it appears on this page, deliberately. The operator’s own pages we could reach publish the piers, the fleet and the frequency but no fare. Resellers and travel sites quote single journeys anywhere between 40 and 60 baht and day passes between 100 and 200 — a spread too wide to print as a fact. What is safe to say is the comparison: it costs several times a single orange-flag fare, so it earns its money only if you are hopping on and off those piers all day. For a one-way trip to somewhere, the orange boat does the same water for 18 baht.

Cross-river ferries: eight crossings, priced by the Marine Department

The little boats that shuttle straight across the river are a different animal again, and the difference is who sets the price. Cross-river fares are set by the Marine Department, not by the boat companies — which is why they move in half-baht steps every few years rather than jumping with the diesel price. The last change we could document took effect on Wednesday 1 June 2022 and added 0.50 baht to every crossing:

The Tha Tian to Wat Arun crossing is the one most people need: it is how you reach the Temple of Dawn without a long road detour over a bridge, and it takes about three minutes. Note that the ferry fare is separate from Wat Arun’s own admission, which this page does not quote.

Two honest caveats on that table. Those are 2022 figures, and the diesel rises that pushed express and canal fares up twice in 2026 landed on ferry operators too — we found no later Marine Department notice, which is not the same as there not being one. And the reason given for the 2022 increase is worth keeping in mind about the whole river: ridership had fallen from 5,000–6,000 passengers a day before the pandemic to 400–500. Budget 5 baht, carry coins, and expect the number to be small either way.

Khlong Saen Saep: the canal that beats the road east-west

The Saen Saep canal boat has run since 1 October 1990 and is operated by Family Transport (2002) Co., Ltd. It is the only public transport in Bangkok that crosses the centre east to west on its own right of way, which at rush hour is the whole argument for it.

Practically, it is two lines that meet at Pratunam, and Pratunam is where you get off one boat and onto the other. The western line runs in toward the Old Town and the Golden Mount; the eastern line runs out past the university district toward Bang Kapi and NIDA. Since 25 February 2022 the eastern end has been extended from Wat Sriboonreung to the Min Buri district office with 12 electric boats — the quietest part of the network and the least written up.

Fares are by distance, not flat: 13 to 23 baht from 30 March 2026, with the further 2-baht rise to 15–25 announced for 7 April that we could not confirm took effect. Hours are widely reported as roughly 05:30 to 20:30 on weekdays and 05:30 to 19:00 at weekends, but we could reach no operator or city page publishing them, so treat those as approximate and do not plan a late return around them.

The experience is the part guides soften and shouldn’t. Boats stop for seconds at low platforms and you board and step off briskly; a pull-up tarp along the side shields passengers from canal water you do not want on you; signage and announcements are in Thai. It is used by thousands of commuters every day and it is fine, but it suits a mobile, confident traveller far more than someone with a suitcase, a pram or small children — for those, the rail network or a car is the better call.

The Old Town canal that has two different boats on it

Khlong Phadung Krung Kasem runs through the historic district and carries two services that get written up as one, which is how people end up at the wrong pier expecting the wrong thing.

• The city’s electric shuttle. Managed by Krungthep Thanakom, the Bangkok administration’s own enterprise, with electric-boat development alongside King Mongkut’s University of Technology Thonburi. Launched in 2016 as part of a canal revitalisation programme, suspended during the pandemic and reopened on 15 March 2023 with eight boats. Eleven piers between Hua Lamphong railway station and Thewet, taking in Yotse, the Ministry of Energy, Lan Luang intersection, Nakhon Sawan, Rajadamnoen Nok, Prachathippatai and Dhevaraj Market. Reported hours are 06:00–09:00 and 16:00–19:30 on weekdays at 20-minute intervals, and 08:00–19:00 hourly at weekends.
• The on-demand water taxi. New in 2026 and a different proposition entirely: the TTA Mariner, run by Thoresen Thai Agencies, carrying up to six passengers and booked through the MuvMi app rather than turning up at a pier. Fourteen piers from Hua Lamphong to Phra Sumen Fort, daily 09:00 to 17:00. It ran as a free trial only through the end of February 2026; after that fares were set in line with MuvMi’s electric tuk-tuks.

Both are useful for the Old Town on foot — the run between Hua Lamphong and Bang Lamphu is a genuinely pleasant way to cover ground that is awkward by road. Neither should be relied on as a free ride today without checking, and neither is a commuter route.

Where the boats meet the trains

The interchange that makes the network work is Sathorn Pier, also signed Central Pier, directly beneath BTS Saphan Taksin (S6) on the Silom Line — the Chao Phraya Tourist Boat prints the station code on its own pier list. Step off the Skytrain, walk down, and the express boats, the blue tourist boat and Thai Smile Boat’s Urban Line all leave from the same place. If you learn one pier name in Bangkok, learn this one.

On the subway side, Thai Smile Boat names Rajinee Pier as its MRT Blue Line connection, which is the one that matters for the Grand Palace end of the Old Town. ICONSIAM has its own pier on the City Line. And on the canal, Pratunam is walkable to the Chit Lom / Ratchaprasong end of the Sukhumvit Line, which is why it functions as the canal network’s de facto interchange as well as its transfer point.

For how the rail lines themselves connect — including which are open, which are still building and what the fare regime is — see our trains and rail travel guide and the Bangkok getting-around guide. If you are arriving from an airport rather than moving around town, airport transfers in Bangkok covers the rail, bus and taxi options gate by gate.

Paying, and the newcomer mistakes worth avoiding

The etiquette is simple and worth getting right, because the crews move fast: have your fare ready, hold the rail, let people off before you get on, keep bags on your lap on the canal boat, and step off briskly.

What we could not confirm

Everything below is a real gap in the record as of 7 September 2026, not a rounding. We would rather print the gap than a number nobody can stand behind.

• Whether the 7 April 2026 fare rise is in force. Two national outlets reported it. The operator’s own schedule, effective 24 June 2026, still shows the 30 March figures. No operator or government notice settling it could be found.
• Which days the express boats actually run. The operator’s schedule page says Monday to Sunday and public holidays in its heading and Monday–Friday in every individual line block. Both are printed above; neither has been picked.
• The Chao Phraya Tourist Boat fare. The operator’s reachable pages publish piers, fleet and frequency but no price. Third-party quotes range from 40 to 60 baht single and 100 to 200 for a day pass, so no figure is printed here.
• The Thai Smile Boat day-pass price. The operator names the 1, 2 and 3-day Thai Go pass and says it covers the boats and all Thai Smile Bus routes, but the pages read carried no amount.
• Whether the no-flag local line was formally withdrawn. The operator publishes four lines and no no-flag service. No notice of withdrawal was located, so its absence from the timetable is what is stated, not its abolition.
• Current cross-river ferry fares. The 1 June 2022 Marine Department table is the most recent we could document. No later notice was found, and no conclusion should be drawn from that absence given how far diesel moved in 2026.
• Khlong Saen Saep operating hours and pier list from a primary source. The operator has no reachable website and no Bangkok Metropolitan Administration page publishing them was found; the hours given are from a secondary source and are labelled as approximate on the page.
• The royal barge rehearsal timetable. The operator posts it as an image we could not read reliably, so no altered times are printed — only the fact that services change on those days.
• Express boat fleet and pier counts. The 65 vessels, 38 piers and roughly 40,000 daily passengers commonly quoted come from a secondary source; the operator itself publishes none of those figures.
• No private tour, charter or dinner-cruise operator is named on this page, on purpose. The services covered are public transport and the two hop-on hop-off operators the network itself runs on.

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