Seattle → Singapore flights

Seattle–Singapore fares: target $357–$410 and book early

Key takeaways

• Median fare is $410, based on 21 daily snapshots of the cheapest cached fares on this route.
• Bottom quartile sits at $357 — fares at or below that level represent genuinely good value and shouldn't be passed up.
• The low recorded was $304, though at just 21 samples this floor may be rare and hard to replicate reliably.
• Spread is 40% between low and high ($304–$427), meaning timing your purchase can meaningfully affect what you pay.
• The p75 fare is $412, just $2 above the median — indicating fares cluster tightly at the top end, so overpaying is easy if you wait.

30-day price trend

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

The full picture

The Seattle-to-Singapore route shows a notable pricing dynamic: while the overall spread between the lowest ($304) and highest ($427) observed fares is 40%, the interquartile range tells a tighter story. The gap between the 25th percentile ($357) and 75th percentile ($412) is only $55, which means most of the time you're shopping, fares are bunched in a fairly narrow band. The $304 floor is real but likely represents a brief promotional window rather than a repeatable baseline — treat anything below $360 as a strong buy signal.

On a route of this length (roughly 17–18 hours, typically with one stop), inventory management by carriers tends to be aggressive. Economy cabins on long-haul transpacific routes usually price lowest when booked 6–10 weeks out for off-peak travel periods, then firm up inside 3–4 weeks as business and premium cabins fill and carriers pull discounted inventory. Given that the p75 fare ($412) is nearly identical to the median ($410), it appears that fares on this route have a ceiling that gets hit quickly — in other words, waiting rarely rewards patience here.

No dominant carrier is identifiable from this dataset, and with 21 samples we can't responsibly segment by day of week or airline. What the data does suggest is a clear strategic posture: if you see a fare at or below $380, it's in the bottom third of observed prices and worth booking. If you're above $412, you're in the expensive quartile and may benefit from checking back over a few days — though don't wait more than a week or two on a route this far in advance.

One honest caveat: 21 snapshots is a moderate sample. Seasonal demand swings — school holidays, Chinese New Year, year-end travel — can push fares well outside this observed range in either direction, and those patterns aren't captured here.

Ready to look at fares?

• When to book
  Seattle → Singapore
  AI-authored booking-window guide
  Open →
• Price history
  Seattle → Singapore
  30-day daily price snapshots
  Open →
• Where to stay
  Best hotels in Singapore
  🇸🇬 Singapore
  Open →
• When to book
  Seattle → Tokyo
  Same origin, different destination
  Open →
• Read
  Singapore Hawker Centres: The Ultimate Food Court Guide
  Singapore · 8 min
  Open →