Flights Bangkok to Singapore (BKK-SIN): Airlines, THB Fares

Bangkok to Singapore is one of the busiest air routes in the world — around 126 flights a week, a near-constant stream from before dawn until late at night. It is a true regional artery, carrying business travellers, weekend tourists, shoppers, students and a large share of passengers connecting onward through Singapore’s global hub.

Block time is about 2.4 hours. With this much capacity the route runs like a shuttle: a seat is almost always available on short notice, and the only real variable is price. Full-service and low-cost carriers compete head to head across the day.

Corridor profile

The BKK–SIN corridor runs about 126 departures a week across 6 carriers, with an average block time of 2.4 hours, and the lowest fare the feed returned for this route is ฿5,130. The frequency figure counts every carrier on the route combined, not any single airline.

What frequency tells you when plans break. 126 weekly departures is ~18 departures a day — if one departure is cancelled there is normally another the same day. That is why frequency matters more than price for anyone with a fixed commitment at the other end. A thin corridor deserves a buffer day before anything that cannot move, not because the airline is poor but because there is no spare inventory to shift you onto.

Combined frequency is not your airline’s frequency. Those 126 weekly departures are spread across 6 carriers, and when your flight is cancelled only the airline holding your ticket owes you a seat. A rival’s empty seat on the same city pair does not help unless an interline agreement exists or you are willing to buy a second ticket. That is why a multi-carrier route is not automatically the safer one it appears to be.

Airlines & baggage

Baseline baggage on BKK–SIN runs 7–30 kg across the 5 of 6 carriers on the route for which we hold a row. These are carrier reference baselines, not entitlements attached to every ticket: cabin class, fare brand and frequent-flyer status all change the weight you actually get.

Bags through-check only on one ticket. The carriers we hold rows for on this corridor are not all in the same alliance. A bag runs through to your final destination only when every sector sits on one ticket, or an interline agreement exists between the operators. Self-connect on two separate tickets to shave the total and you collect the bag, clear the transit country’s immigration, and check in again — and the time you must allow is far longer than a booking screen implies.

Airlines on this route

6 carriers operate BKK–SIN — 2 full-service and 3 low-cost. Alliances present on the route: Star Alliance. Multiple carriers only affect price when both sides are actually selling in the same window. The lowest fare the feed returned for this route is ฿5,130 on a 2026-09-26 departure.

Six carriers fly BKK-SIN: Thai Airways and Singapore Airlines on the full-service side, with Scoot, Thai AirAsia, Thai Vietjet and Jetstar Asia covering the low-cost end. Full-service fares include baggage and a fuller cabin; the low-cost carriers price the seat low and sell baggage, seats and meals separately. On a route this short and this frequent, the all-in cost once add-ons are counted, and the departure time, are what decide it.

What an alliance buys, and what it does not. Star Alliance on this route means through-checked bags, conditional lounge access, and — the part that matters — a realistic chance of being moved onto a partner’s aircraft when things break. What an alliance does not buy is compensation. That comes only from the law of the jurisdiction involved, never from a logo on the ticket.

Monthly market-low pattern (THB)

Fare trends

Between 2026-W20 and 2026-W31 we captured the BKK–SIN low 8 times, ranging ฿3,965 to ฿6,477 — a 63% spread. The cheapest reading fell in week 2026-W25, and from first capture to last the low moved up 2%.

With this much frequency, BKK-SIN fares stay highly competitive and rarely spike outside major holidays. The cheapest seats are the low-cost carriers’ early-released fares — booking two to five weeks ahead usually lands a good THB price, and mid-week departures undercut weekends. When comparing, add baggage to the low-cost headline fare; on such a short hop many travellers fly cabin-baggage-only and keep the cost minimal.

Who holds the floor. Across 8 captures Scoot held the low 6 times and no other carrier took it once in this window, which makes that airline’s price the corridor’s reference number. With N=8 and a weekly cadence, short promotions can slip between captures.

How to read a 63% spread. The gap between the cheapest and dearest week is the size of the movement this corridor showed in the window we observed. A wide spread means timing matters a lot; a narrow one means the fare is stable and watching it is not worth your time. The figure measures only the lows we captured, not every seat sold that week.

Seasonality & best time to book

Our catalogue lists 6 carriers on this city pair. BKK–SIN is a regional corridor with a shorter booking window than long-haul. The fare tracks low-cost promotional cycles and Thai long weekends more than any season at the destination, and Songkran plus the consecutive-holiday blocks are the tightest weeks of the year.

Bangkok–Singapore fares move with demand. The cheapest windows fall outside school holidays, Songkran and New Year; book 4–8 weeks ahead for normal dates.

The booking window matters more than the booking day. On a 2.4-hour corridor the fare tracks how many seats remain in each fare bucket, not which weekday you click buy. The folklore about a magic booking day has no support in the series we capture. What does show up is widening your travel dates by a day or two.

Thai public holidays are the controllable variable. The holiday calendar is published a year ahead and is the one part of the equation you know before the airline reprices. Shifting out of a consecutive-holiday week by even two days moves you off the tightest demand for both seats and rooms — a bigger effect than switching airline.

About Singapore

Our catalogue lists 6 carriers on this city pair. Singapore (SIN) sits in Singapore, uses SGD, and the visa position we record for a Thai passport is: visa-free 30 days (ASEAN). The flight from Bangkok runs about 2.4 hours. Singapore — business + leisure hub, visa-free 30 days

Singapore is a city-state at the foot of the Malay Peninsula and one of the world’s principal hubs for trade, finance and aviation. Compact, green and meticulously run, it offers strong food, shopping and public transport in a small, easily covered area. For travellers from Bangkok it works equally well as a short city break, a business destination, or the first stop of a longer journey — Changi Airport’s onward network reaches almost everywhere.

What visa-free does not mean. Entering without a visa in advance is not a right to work, not a right to study, and not a guarantee of admission — the officer at the border still decides. The conditions most often forgotten are remaining passport validity, an onward ticket and proof of accommodation. All three are asked for more often than travellers expect, and their absence lets the airline refuse boarding at the departure airport.

Passenger rights on BKK–SIN

Our catalogue lists 6 carriers on this city pair. Departures from Thailand fall under Thailand CAAT; the return from Singapore falls under Singapore CAAS. The two regimes are not the same, and what you are owed changes with the direction of travel and the nationality of the operating carrier — never with the fare you paid.

No European-style compensation schedule applies here. The destination sits with Singapore CAAS, which typically imposes duty of care, re-routing and refund obligations but no fixed EU261-style cash bands. The enforceable floor is therefore the airline’s own conditions of carriage plus Thailand CAAT rules for departures from Thailand. Read the conditions of carriage before you buy — that is the document that actually binds you.

Baggage and delay are governed by different instruments. If a bag is lost or arrives late on an international journey, the basis of claim is the Montreal Convention 1999, which applies where both the origin and destination states are parties. Its ceilings are denominated in SDR and revised periodically, so only the current figure is citable. The practical consequence is that the two claims are independent: having no delay-compensation right does not remove a baggage claim, and the report should be filed at the baggage desk before you leave the airport.

FAQ

Which airlines fly Bangkok to Singapore?

The BKK-SIN route is operated by Thai Airways, Singapore Airlines, Scoot, Thai AirAsia, Thai Vietjet and Jetstar Asia. Compare baggage, alliances and fares in the table above.

How long and how often is the BKK-SIN flight?

Block time is ~2.4h, with ~126 flights per week across all carriers.

When is BKK-SIN cheapest to book?

The lowest fare our feed returned for this route is ~฿2,567. Book 4–8 weeks ahead; avoid Songkran, school holidays and peak season to save 15–30%.

What exactly is the lowest fare shown on this page?

It is the cheapest fare our cache has recorded on BKK–SIN, captured one snapshot at a time. It is not an average, not a live quote and not a guarantee that a seat still exists at that price. Use it as a reference floor, then check live pricing.

What is the difference between a direct and a nonstop flight?

Direct means the flight number does not change, but the aircraft may still land en route. Nonstop means no intermediate landing at all. If the clock matters, filter on nonstop, not direct.

If my BKK–SIN flight is cancelled, who is responsible?

The destination sits with Singapore CAAS, which generally imposes duty of care, re-routing and refunds but no fixed EU261-style cash bands. The enforceable floor is the airline’s conditions of carriage plus Thailand CAAT rules for departures from Thailand.

Will my bag be through-checked if I book two separate tickets?

No. Through-checking happens only when every sector is on one ticket or an interline agreement exists. On separate tickets you reclaim the bag, clear the transit country’s immigration and check in again — and a missed connection is a new ticket at your cost.

Search live fares

Search BKK → SIN on Aviasales →

Related

• BKK airport
• SIN airport