BTS, MRT and river boats in Bangkok: how to ride

Bangkok is one of those cities where a 5-mile car ride can take an hour at rush hour. The fix is rail and water. Once you learn which system takes which card, getting around is cheap, cool and fast.

The short version

Bangkok's rail network isn't one system. The BTS Skytrain, the MRT subway and monorails, the Airport Rail Link and the SRT Red Lines all have different operators, and you pay each one separately [1][2].
MRT Blue Line fares are THB 17–44 (about USD 0.50–1.30) from July 3, 2026 [2]. BTS trips that use both the main line and its extensions are capped at THB 65 (about USD 1.93) [3].
On the MRT Blue and Purple lines, tap your US Visa or Mastercard at the gate. The old MRT cards stopped working on June 1, 2026 [4]. On the BTS, you still need a Rabbit card or a single-journey ticket.
The Chao Phraya Express orange-flag boat is THB 19 (about USD 0.56) for any distance on the operator's site [5]. The Khlong Saen Saep canal boat runs THB 15–25 (about USD 0.44–0.74) after an April 2026 increase [6].
The 20-baht fare cap that the Purple and Red lines once had ended on September 30, 2025 [7]. Budget on regular fares.

USD conversions use the Federal Reserve H.10 rate of October 30, 2026 (USD 1 = THB 33.76) [8].

The rail lines

Line	Operator	Runs between	Handy for
BTS Sukhumvit (light green)	BTSC	Khu Khot and Kheha [1]	Sukhumvit, Asok, Thong Lo, Ekkamai, Siam, Ari
BTS Silom (dark green)	BTSC	National Stadium and Bang Wa [1]	Silom, Sathon, Saphan Taksin (river boats)
BTS Gold	BMA	Krung Thon Buri and Khlong San [1]	ICONSIAM
MRT Blue	BEM	A loop through Tha Phra and Tao Poon, out to Lak Song [1]	Sukhumvit, Silom, Chatuchak, Chinatown, Hua Lamphong
MRT Purple	BEM	Khlong Bang Phai and Tao Poon [1]	Nonthaburi suburbs
MRT Yellow (monorail)	Eastern Bangkok Monorail	Samrong and Lat Phrao [1]	Eastern suburbs, Srinakarin
MRT Pink (monorail)	Northern Bangkok Monorail	Nonthaburi Civic Center and Min Buri [1]	Northern suburbs, Muang Thong Thani
Airport Rail Link	Asia Era One (SRT concession)	Phaya Thai and Suvarnabhumi Airport [1]	The main airport
SRT Red Lines	State Railway of Thailand	Bang Sue to Rangsit, and Bang Sue to Taling Chan [1]	Don Mueang area, Krung Thep Aphiwat station

If you're used to New York's subway, the big difference is transfers. Moving from the BTS to the MRT means leaving one system and paying again, even at stations that sit right on top of each other, like Asok/Sukhumvit and Sala Daeng/Silom. On a trip with a couple of changes, those separate fares add up.

Fares and how to pay

MRT: tap your credit card

The MRT has gone fully contactless. Since June 1, 2026, the old MRT and MRT Plus cards no longer open the gates on the Blue and Purple lines [4]. Instead, you tap an EMV contactless card. Visa and Mastercard credit cards from any bank work, along with certain Thai debit and prepaid cards and some UnionPay cards [4]. In practice that means your US credit card, as long as it has the contactless symbol.

A few tips:

Use a card with no foreign transaction fee. Small charges add up over a month of commuting.
Tap the same card in and out. The fare is worked out by distance.
Leftover value on old MRT cards can be refunded until December 31, 2027 [4].
Discounts: seniors get 50% off and students 10% off on the Blue Line [2]. To keep those discounts, the MRT is swapping people onto Mangmoom EMV cards for free until December 31, 2026 [4]. Ask at a station whether foreign residents qualify.

Blue Line fares run THB 17–44 (about USD 0.50–1.30) from July 3, 2026 through July 2, 2028 [2].

BTS: get a Rabbit card

The BTS Skytrain uses its own stored-value card, the Rabbit card, with adult, student and senior versions and a THB 100 starting balance [1]. Buy one at a station ticket office and top it up with cash at the ticket window. You can also buy single-journey tickets at the station machines.

Fares on the BTS rise with distance. Since November 1, 2025, trips on the extensions alone run THB 17–45, and trips using both the core line and the extensions are capped at THB 65 (about USD 1.93) [3].

Contactless bank cards are coming to the BTS. An August 2026 report said BTSC was working on EMV readers ahead of a planned January 1, 2027 joint-fare scheme, with fares of THB 17–45 across connecting lines, but installing readers at every gate could take about 18 months [9]. Until you see the readers at your station, carry your Rabbit card.

The yellow and pink monorails, airport line and Red Lines

These lines have their own ticketing, and payment options have been changing as Thailand moves toward common ticketing [4]. The Airport Rail Link charges THB 15 to 45 (about USD 0.44–1.33) depending on distance [1]. Check the machines and gates on your first trip.

What about the 20-baht fare?

You may hear about a 20-baht cap. The Purple and Red lines had one, but it ended on September 30, 2025, and normal fares came back on October 1, 2025 [7]. Plans to cap fares on every line have been announced and shelved before, and the versions we saw were aimed at Thai riders, so don't count on one. In late 2025, Thailand passed a common ticketing law aimed at eventually letting one card work across all lines [4].

Getting to and from the airports

Airport	By rail	Notes
Suvarnabhumi (BKK)	Airport Rail Link to Phaya Thai, where you can change to the BTS [1]	Cheap and quick, but crowded with luggage at rush hour
Don Mueang (DMK)	SRT Dark Red Line from Bang Sue, via Krung Thep Aphiwat [1]	Used mostly by budget airlines

If you've got a mountain of bags, a metered taxi or ride-hailing app is often easier. Grab is the ride app most Americans use, for cars and for motorbike taxis.

River boats: the scenic commute

Chao Phraya Express

The Chao Phraya Express boats run up and down the river with colored flags marking each service. Fares from the operator's site [5]:

Flag	Route	Fare
Orange	Nonthaburi – Wat Rajsingkhon	THB 19 (about USD 0.56)
Yellow	Nonthaburi – Sathorn	THB 24 (about USD 0.71)
Green-yellow	Pak Kret – Sathorn	THB 17–36 (about USD 0.50–1.07) by distance
Red (air-conditioned)	Nonthaburi – Sathorn	THB 33 (about USD 0.98)

The orange flag is the everyday workhorse and stops at the most piers. Sathorn pier sits by BTS Saphan Taksin, which makes the boat a handy link from the Silom line to the Grand Palace area and Chinatown. Fares follow the price of diesel: a newspaper report in April 2026 listed fares 1 baht higher than the operator's site [6], so carry small change. Not every flag runs every day, so check the timetable for weekends.

Khlong Saen Saep canal boat

This is Bangkok's best-kept commuter secret. The canal boat runs about 18 km (11 miles) from Panfa Leelard pier near the Golden Mount east to Wat Sriboonruang, changing boats at Pratunam [10]. Piers include Pratunam near CentralWorld, Chidlom, Nana Nuea by Bumrungrad Hospital and Asoke-Petchaburi near MRT Phetchaburi [10]. Boats run from 5:30 a.m. to 8:30 p.m. on weekdays and stop earlier on weekends [10].

Fares rose to THB 15–25 in April 2026 [6]. You pay a conductor on board, in cash [10]. Hop on fast, hold the rope and keep your phone in a pocket, because the canal water splashes and the boats don't wait. It's not elegant, but at rush hour it can beat a taxi by half an hour.

Motorbike taxis and buses

For short hops from the BTS to the end of your soi, the motorbike taxi guys in numbered vests are part of daily life. Agree on the fare before you hop on, and always wear the helmet. BMTA city buses are cheap and go everywhere, but routes take practice.

Want to know which line and card combo works best from your neighborhood? Ask in our community group for Americans in Thailand.

BTS, MRT and river boats in Bangkok: lines, fares, cards and the boats that beat the traffic