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IAH–Santiago fares median $456 over 23 days in a 30-day window; most deals fall between $386 and $459, so book when you see fares near the low end.
Written from this route's 30-day price index (23 daily samples). Article last regenerated Nov 7, 2026.
See full numbers and stats on the IAH → SCL price history page.
Fares for Houston to Santiago over this 30-day window ranged from $386 to $608, with a median of $456. That's a 58% spread between low and high, but the middle half of observed fares — $386 to $459 — is much tighter, which tells us most days land close to the median and the high-end fares are likely outliers tied to specific dates or cabin availability rather than the norm.
With 23 of the 30 days in the window showing a cached fare, the sample is solid enough to trust the general shape of pricing, though not every single day is accounted for. The practical takeaway is that fares near $386-$400 represent genuine low points worth booking when you see them, while anything creeping toward $500 or above is on the expensive side of normal for this route. We don't have enough resolution in this data to say early versus late booking within the window makes a reliable difference — the pattern here is more about fare-to-fare variation than a clear time-based softening.
We don't have carrier-level detail strong enough to call out a dominant airline or day-of-week effect for this route, so we won't speculate on which carrier or weekday tends to be cheaper. The honest caveat: this is a single 30-day snapshot, not a seasonal trend — fares to Santiago can shift with South American summer travel demand (December-February) or Houston's connecting schedules, so treat $456 as a current benchmark rather than a year-round rule. If your travel dates are flexible, aim for fares at or below the $386-$459 range and treat $608 as a sign to wait or search alternate dates.
Why we regenerated this article: Bottom quartile ↓ 15% ($456 → $386). We only rewrite when the underlying price index actually moves — stable weeks keep the previous take.
AI-authored from this route's 30-day price index. Article last regenerated Nov 7, 2026. Fares shift continuously — confirm at booking.