Best Time to Book

Boston → Buenos Aires flights

BOS–EZE fares have held near a $420 median over a short sample; limited data makes booking-window timing hard to call precisely.

Fares cluster near $420–$438 — one low outlier at $349

Key takeaways

Median fare is $420, with most observed prices bunched between $420 and $438 (the p25–p75 band).
Low of $349 appeared just once in the 9-day sample — a possible outlier rather than a reliable target.
High of $440 is close to the median, suggesting fares have been relatively stable aside from that one dip.
26% spread is moderate, driven mostly by that single low fare rather than broad volatility.
Only 9 snapshots were collected — too thin a sample to confidently generalize booking timing.

30-day price trend

BOS → EZE · cheapest cached fare per day · last 9 days · ↑ 26%

$349 low$440 high

See full numbers and stats on the BOS → EZE price history page.

The full picture

The data shows a tight cluster of fares between $420 and $438 for most of the sample window, with the median sitting at $420. That consistency suggests pricing on this BOS–EZE route has been fairly stable recently — but the one standout data point at $349 pulls the overall spread to 26%, which looks more volatile than the day-to-day reality probably is. Treat that $349 fare as a rare find rather than an expectation.

With only 9 days of snapshots, we can't responsibly point to a specific booking window where prices reliably soften — the sample is too thin to separate a genuine pattern from noise. What we can say is that if you see a fare notably below the $420 median, especially near that $349 mark, it's worth treating as a good deal relative to this route's recent pricing, since most days have landed much closer to the top of the range.

No carrier information was distinguishable in this dataset, so we can't speak to airline-specific pricing behavior or day-of-week patterns here. The honest takeaway: with just 9 observations, this snapshot gives a reasonable sense of the current price floor and ceiling, but not enough history to confidently advise on *when* in the booking cycle to buy. Treat the $420 median as your benchmark, and consider anything near $349–$400 a strong fare worth booking rather than waiting for improvement.

Ready to look at fares?

Search BOS → EZE on Aviasales →See the price history →

Related travel pages

Why we regenerated this article: Bottom quartile ↑ 20% ($349 → $420). 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 Oct 10, 2026. Fares shift continuously — confirm at booking.