Seattle → Taipei flights

Median sits at $599 — but the bottom quartile opens a $357–$433 window

Key takeaways

• $599 is the median fare across 28 daily snapshots — a solid baseline for budgeting this transpacific route.
• The bottom quartile ($357–$433) shows genuine low-fare opportunities, though they appear infrequently enough to require monitoring.
• At 102% spread between low and high, prices on this route are highly volatile — flexibility in travel dates meaningfully improves your odds.
• The p75 fare of $703 signals that more than a quarter of observed prices clustered near the ceiling, so waiting too long carries real cost.
• No dominant carrier was identifiable from this data, so comparing multiple airlines rather than defaulting to one carrier is advisable.

30-day price trend

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

The full picture

Seattle–Taipei (SEA–TPE) is a long-haul transpacific route where fare volatility is the defining characteristic. With a spread of 102% between the observed low ($357) and high ($721), the price you pay depends heavily on when you look and how far out you book. The median of $599 across 28 daily snapshots is a reasonable anchor for planning purposes, but the interquartile range — $433 at p25 to $703 at p75 — tells a sharper story: roughly half of all observed fares fell in a $270-wide band, meaning the "typical" experience is not one price but a fairly wide corridor.

On routes of this distance and complexity, fares historically soften in two windows: when airlines seed inventory early (roughly 3–6 months out for transpacific itineraries) and occasionally in short-lived promotional drops closer to departure when seats go unsold. The data here shows that sub-$433 fares do exist — they just represent the bottom quartile, not the norm. Setting a fare alert at or below $450 gives you a realistic target grounded in observed prices without chasing an outlier. If your dates are fixed, booking when you first see a fare at or below the median ($599) is a defensible strategy given how quickly this route moves toward its upper range.

Because no single dominant carrier emerged from this dataset, treating SEA–TPE as a genuinely competitive market and cross-shopping all available options — including one-stop itineraries through hubs like Tokyo, Seoul, or Hong Kong — is likely to yield better results than loyalty to a single airline. One honest caveat: 28 snapshots capture a limited slice of the demand calendar. Fares on this route can shift meaningfully around holidays like Lunar New Year or Golden Week, and those seasonal spikes are not fully represented here. Treat these numbers as directional guidance, not a guarantee.

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