Best Time to Book

Houston → Seoul flights

Houston to Seoul fares held near $550 over 11 days sampled, with little variation — budget around that figure.

IAH–Seoul fares are steady — expect about $550

Key takeaways

Median fare sits at $550, with observed prices ranging from $510 to $560
Spread of just 10% suggests this route doesn't fluctuate much day to day
Bottom quartile fares were $543 or below — close to the median, so there's little bargain-hunting upside
Top quartile tops out at $560, meaning even pricier days aren't far from typical
Sample size of 11 days is thin — treat this as a directional read, not a firm forecast

30-day price trend

IAH → ICN · cheapest cached fare per day · last 12 days · ↑ 3%

$510 low$560 high

See full numbers and stats on the IAH → ICN price history page.

The full picture

The data shows a tight band for IAH–ICN fares: a $50 spread between the $510 low and $560 high, with a median of $550. A 10% spread is low by airfare standards, meaning this route doesn't show the kind of dramatic swings travelers sometimes chase. If you're budgeting, $550 is a reasonable number to plan around, and there's not much evidence of a hidden cheap window waiting to be found.

Because the sample only covers 11 days, we can't speak confidently to a booking-horizon pattern — the kind of story where fares soften at 3 weeks out or spike inside 7 days just isn't visible in this dataset. What we can say is that the bottom quartile ($543) and top quartile ($560) are close together, reinforcing that this route prices fairly consistently regardless of when within the sampled window you checked.

No dominant carrier or day-of-week pattern was identifiable from the data provided, so we won't speculate on airline-specific pricing behavior or claim certain departure days are cheaper — that's not something this sample supports. The honest takeaway: with only 11 snapshots and a narrow 10% spread, this is a stable but thinly observed route. Booking whenever fits your schedule near $550 is a defensible call, but a longer observation window would give more confidence in timing advice beyond that.

Ready to look at fares?

Search IAH → ICN on Aviasales →See the price history →

Related travel pages

AI-authored from this route's 30-day price index. Article last regenerated Oct 10, 2026. Fares shift continuously — confirm at booking.