Flights from Singapore to Thailand: Routes, Airlines & Fares

Singapore to Bangkok is one of Southeast Asia’s most intensely served short-haul routes — around 2 hours 30 minutes nonstop, with dozens of daily departures split between budget carriers and full-service airlines. Fares start under SGD 100 return, midweek seats on Scoot or AirAsia are often cheaper than the MRT to the airport, and the frequency means you can book a weekend trip to Bangkok with little more than a fortnight’s notice.

The short hop character of this market is quite different from long-haul planning. You are not choosing a routing hub or worrying about connection risk. The decisions are simpler: budget or full-service, Suvarnabhumi or Don Mueang, Bangkok or one of the direct leisure airports. For a broader overview of flying to Thailand from any origin — choosing the right Thai airport, seasonal patterns, and what to do once you land — see our main flights to Thailand guide.

Singapore to Bangkok: the short hop

Both of Bangkok’s main airports are served from Singapore Changi. Don Mueang (DMK) is the budget hub — Scoot, AirAsia, and Thai Lion Air land there. Suvarnabhumi (BKK) handles the full-service carriers and some budget overlap.

Fares listed are typical economy return estimates and vary by season, day of week, and how far in advance you book. They are not guarantees.

Flying direct to Phuket, Krabi, Koh Samui & Chiang Mai

Bangkok is the obvious first stop, but Singapore has direct or near-direct services to several Thai leisure destinations that save you the domestic connection.

Phuket (HKT) has the strongest direct coverage from Singapore. Scoot and Singapore Airlines operate regular services from Changi. Flight time is around 2h10-2h20 — marginally shorter than Bangkok. Worth booking direct if Phuket is your only destination.

Krabi (KBV) has seasonal direct service from Singapore, typically on Scoot and AirAsia. Schedules vary considerably by season — check at time of booking rather than assuming year-round availability.

Koh Samui (USM) is served by Bangkok Airways, which runs a direct Samui-Singapore service from its Samui hub. Other carriers have flown the route intermittently, so check current schedules rather than assuming year-round availability. Failing a direct flight, most travellers fly SIN-BKK and connect to Samui domestically.

Chiang Mai (CNX) has had seasonal direct charter and LCC service from Singapore, though scheduled nonstop services are less consistent than Bangkok or Phuket. The practical alternative — SIN-BKK then BKK-CNX domestically — takes around 4-5 hours total and is usually available daily.

Insider Tip: For Koh Samui or Chiang Mai, compare the direct route (if available) against flying SIN-BKK and buying a domestic ticket separately. The separate option is often cheaper and gives you more flexibility if one leg changes.

Budget vs full-service: which to pick?

On a flight this short, the case for a budget carrier is strong. You are in the air for about 2 hours 30 minutes — not long enough for a full meal service to matter, and not long enough for a lie-flat seat to make a meaningful difference to how you arrive.

Budget (Scoot, AirAsia, Thai Lion Air): Best for leisure travellers who book early, travel light, and want to keep the whole trip cost down. The fare difference between a budget return and a full-service return is typically SGD 100-300 — enough to cover two nights at a good Bangkok hotel. Watch the add-on costs: checked luggage, seat selection, and airport food can close the gap quickly if you’re not paying attention.

Full-service (Singapore Airlines, Thai Airways): Worth paying for if you are collecting KrisFlyer or Royal Orchid Plus miles, need lounge access for a same-day connection in Bangkok, or are travelling on a business ticket where the flexibility of a changeable fare matters. Singapore Airlines’ service quality on even a short-haul flight is a notch above the region’s LCCs.

Watch out: Budget carrier ancillary fees (bags, meals, seat selection) are not always shown upfront in comparison searches. Price the total trip cost, not just the base fare, before deciding.

When are flights from Singapore cheapest?

The SIN-BKK route is served so densely that it rarely has the dramatic seasonal price swings you see on long-haul. Frequency is the market’s character — there are often ten or more daily departures — so the levers are more granular.

Cheapest days: Tuesday to Thursday departures consistently beat Friday evening and Sunday afternoon slots, which serve the weekend-trip market from Singapore. The difference can be SGD 50-100 return on the same carrier.

Cheapest months: May, September, and October align with Thailand’s low season and are the softest months for Singapore-Bangkok fares. December and Chinese New Year are the two peak periods worth avoiding for cost.

How far ahead to book: Three to six weeks is usually enough for a good fare. The route has enough capacity that you rarely need to plan months ahead, unlike a long-haul booking. Last-minute fares on Tuesday or Wednesday departures can be surprisingly competitive — budget carriers with empty seats often drop prices within ten days of departure.

Pro Tip: Scoot runs regular sales for Singapore-based travellers. Follow their newsletter or check their promotional fares page — flash sales for SGD 40-60 one-way are not unusual and are aimed squarely at the Singapore weekend-getaway market.

How to compare fares

Skyscanner covers every carrier on the SIN-Bangkok route, including the budget carriers that don’t always appear on other aggregators. Use the “Whole month” calendar view to find the cheapest day across a range of departures — the visual grid makes midweek vs weekend price differences obvious at a glance.

For leisure airports (Phuket, Krabi), also check Scoot’s own site directly — they occasionally sell seats at prices that don’t filter through to aggregators immediately during sales windows.

What to sort before you fly

• eSIM — Activate before landing. Best options in our Thailand eSIM guide.
• Travel insurance — Short trip or not, medical costs in Thailand are significant without cover. See our travel insurance guide.
• Airport transfer — Pre-book from Bangkok’s airports to avoid queues. See airport transfers.
• TDAC — Thailand’s Digital Arrival Card must be submitted online within 72 hours before arrival. Details in our entry requirements guide.
• Money — A no-FX-fee card (Wise is widely used in Singapore) saves on every THB withdrawal. More in our money in Thailand guide.