San Francisco → Singapore flights

Budget $370–$380 for SFO–SIN — outliers hit $675

Key takeaways

• Median fare is $374 across 30 daily price snapshots — a useful anchor for budget planning.
• Half of all observed fares fell between $367 and $381 (p25–p75), meaning the typical price band is unusually narrow.
• The low was $355 — only $19 below the median — suggesting true bargains on this route are rare but real.
• High reached $675 — a 90% spread — meaning fare spikes are severe when they occur, likely around holidays or peak demand periods.
• Act quickly near the $355–$367 range: fares in the bottom quartile don't appear to linger given how tight the core distribution is.

30-day price trend

See full numbers and stats on the SFO → SIN price history page.

The full picture

The SFO–Singapore route shows a strikingly compressed core price band: the middle 50% of fares observed over 30 days spans just $14 (from $367 to $381). That kind of tight clustering suggests a relatively stable base fare environment — airlines aren't moving aggressively on price day-to-day within the normal range. For travelers, this is actually useful information: if you see a fare below $370, it's genuinely in the bottom quartile of what's been available, and worth acting on. The median of $374 is your most reliable planning number.

The 90% spread tells a more cautionary tale. While the bulk of fares sit comfortably near the median, the high of $675 is nearly double the low of $355 — a gap almost certainly driven by last-minute booking windows, peak travel periods, or sold-out economy cabins forcing shoppers into premium-economy inventory. SFO–SIN is a long-haul transpacific route (roughly 17–18 hours nonstop), and these routes are particularly vulnerable to sharp fare jumps as departure nears and cheap economy seats sell out. The practical implication: don't wait. The downside of booking late on this route is severe, while the upside of holding out for something materially below $367 appears limited given how rarely fares dipped into that range.

Carrier and day-of-week patterns are not visible in the current dataset, so no specific airline or departure-day recommendation can be responsibly made here. What the data does support clearly is a booking target: fares between $355 and $367 represent genuine value, fares at $367–$381 are solidly typical, and anything above $400 warrants either flexibility on dates or acceptance that demand conditions have shifted. One honest caveat: 30 snapshots capture a single rolling window and may not reflect seasonal shifts — fares to Singapore can move meaningfully around major holidays on both ends of the route.

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