A Singapore to Japan flight is one of those purchases where two people on the same plane can pay wildly different prices. A one-way budget seat to Tokyo has gone for as little as S$188 with ZIPAIR in an off-peak week, while the same route on a full-service carrier in December averages over S$850. The gap is not luck. It comes down to which airline you pick, which month you fly, and whether the cheap headline fare survives once you add a bag, a seat and a meal. This guide maps where the savings really sit in 2026, the budget traps that erase them, and one new cost almost nobody has budgeted for: Japan's departure tax tripling on 1 July 2026.
Treat the headline fare as a starting point, not the price. Budget carriers quote a bare one-way that often excludes checked baggage, seat selection and food, so the number you see and the number you pay can differ by S$100 or more. Full-service fares bundle those in but start much higher.
The figures below are indicative 'from' one-way economy fares pulled from airline and aggregator listings as of June 2026. Real prices move daily with demand, so use these as a benchmark for what counts as a good deal, not a guarantee. To Tokyo, Trip.com listed fares from around S$188 to S$190 with ZIPAIR in an off-peak July week, with February averaging roughly S$192 one-way.
| Airline | Type | Cheapest cities | From (one-way) | Notes |
|---|---|---|---|---|
| ZIPAIR | Budget | Tokyo (Narita) | ~S$188 | Direct; bags and meals charged separately |
| Scoot | Budget | Tokyo, Osaka, Sapporo, Okinawa | ~S$200-247 | Direct; 10kg cabin allowance included |
| AirAsia | Budget | Osaka, Tokyo, Fukuoka | ~S$224-294 | Usually via Kuala Lumpur; bags extra |
| Peach | Budget | Osaka | ~S$199 | 20kg checked bag often included |
| Korean Air | Full-service | Most cities via Seoul | ~S$429-479 | One stop; 23kg bag, meals included |
| ANA / JAL | Full-service | Tokyo, Osaka, Fukuoka, Nagoya | ~S$420-460 (one-way) / from ~S$768 return | Direct; bag, meals, seat included |
| Singapore Airlines | Full-service | Tokyo, Osaka, Nagoya, Fukuoka | from ~S$768 return | Direct; full bundle, miles-earning |
The honest comparison is not fare against fare, it is total cost against total cost. Add the extras a budget seat needs to a full-service seat that already includes them, and the gap narrows fast for anyone travelling with luggage.
A realistic budget round-trip to Tokyo: a S$188 each-way fare is S$376, plus roughly S$60-80 each way for a 20kg checked bag, plus S$30-50 for seats and meals. You land near S$550-600 all in. A full-service return that starts around S$768 already carries 23-30kg, food and free seat selection, and earns miles or KrisFlyer points. For a solo traveller with carry-on only, budget wins clearly. For two people with checked bags, the maths gets close enough that comfort and miles can tip it.
Timing moves the price more than the airline does. The cheapest windows are mid-January to February, just after the New Year rush, and mid-May to early June, after Japan's Golden Week and before the summer peak. June often shows up as the single cheapest month on the Singapore to Japan route.
The expensive windows are predictable: late March to April for cherry blossom season, when return fares drift to roughly S$455-S$520 if booked early, plus December, which has averaged around S$854 and is the priciest month to fly. Booking 2 to 3 months ahead, and flying mid-week on Tuesday or Wednesday, are the two simplest levers most travellers ignore. A savings-goal plan that sets the airfare aside early also stops a peak-season trip from going on a credit card.
Direct budget fares to Tokyo and Osaka are now cheap enough that a connection rarely saves money for those two cities. Where one-stop routes earn their place is the smaller cities: Fukuoka, Sapporo, Nagoya, Kagoshima and Okinawa, where direct options are thin or absent and a hub like Seoul, Kuala Lumpur or Bangkok opens up far more dates and prices.
Korean Air via Seoul, for instance, reaches most Japanese cities and lets you stretch a long layover into a half-day in the city. The trade-off is time and the risk of a missed connection on separate tickets. If you book two budget legs on different airlines to save a few dollars, you carry the cancellation risk yourself, which is exactly when travel insurance earns its premium.
The cheap fare is real. The cheap trip is not automatic. These are the line items that quietly close the gap with a full-service ticket, and where to head them off.
A 20kg checked bag added at the airport can cost two to three times what it does pre-purchased online. Buy it during booking, weigh your bag at home, and remember Scoot includes 10kg cabin allowance where many rivals give 7kg.
Seat selection, onboard meals and change or cancel add-ons stack up. Scoot's Change Your Flight and Cancel Your Trip options cost extra; skip them unless your plans are genuinely uncertain, and bring your own snacks for a seven-hour flight.
Two route changes matter for 2026 planning. Jetstar Asia ceased all operations on 31 July 2025, removing its Changi-based budget routes including Okinawa, so older fare comparisons are stale. AirJapan was also reported to be winding down around March 2026, so confirm the carrier is still operating before you build a trip around an old quote.
Japan's International Tourist Tax, the 'sayonara tax', is charged when you leave the country and is usually folded into your ticket price. It has been a flat JPY 1,000 per departing traveller since 2019. From 1 July 2026 it triples to JPY 3,000 per person for everyone aged two and up leaving by air or sea.
On its own that is roughly S$26 extra per person at mid-2026 rates, small against the fare but easy to forget for a family of four. It is one of several 2026 cost changes, alongside higher accommodation levies in some cities, so build a small buffer into your trip budget rather than treating the flight as the whole cost.
The biggest saving on a Japan trip is often not the flight at all, it is the exchange rate and how you spend once you land. The yen has stayed weak against the Singapore dollar through 2026, which stretches every dollar you spend in Japan further than it did a few years ago, so a slightly pricier fare can still mean a cheaper holiday overall.
Where travellers leak money is on the ground. Paying by a card that charges a foreign transaction fee adds around 3 percent to every purchase, and 'dynamic currency conversion' (paying in SGD at a Japanese terminal) bakes in a poor rate. Use a multi-currency card or a fee-free travel card, always choose to be charged in yen, and compare cash rates before relying on airport money changers. A travel credit card that waives the foreign transaction fee can save more across a trip than shaving S$30 off the fare, and a quick check of money-changer rates beats converting at the airport.
Put the levers together and the routine is short. Set a price alert on a flight aggregator for your dates, compare the direct budget fare against a one-stop full-service fare on total cost (not headline), and book 2 to 3 months out for an off-peak month.
Budget carriers are cheapest, with ZIPAIR and Scoot regularly offering the lowest one-way fares to Tokyo and Osaka, sometimes from under S$200 in off-peak weeks. Once you add checked baggage, seats and meals, the gap with a full-service airline like ANA or Singapore Airlines narrows, so compare on total cost rather than headline price.
Mid-January to February and mid-May to early June are typically the cheapest windows, because they fall after the New Year rush and after Golden Week. June often shows the lowest average fares on the route. Avoid late March to April (cherry blossom season) and December, which is usually the most expensive month to fly.
For most off-peak trips, booking roughly 2 to 3 months before departure gives the best odds of a low fare, and mid-week departures on Tuesday or Wednesday tend to undercut weekend flights. For cherry blossom season in late March and April, book earlier, ideally by January, because fares climb quickly as the dates fill up.
Yes. Japan's International Tourist Tax is charged when you leave the country and is usually included in your ticket price. It has been JPY 1,000 per departing traveller since 2019, but it triples to JPY 3,000 per person from 1 July 2026 for everyone aged two and older leaving by air or sea, which is roughly S$26 extra each at mid-2026 rates.
This is general financial information for Singapore, not personal financial advice. Figures change — verify current rates against the official sources above before acting. See our full disclaimer.