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Boston → San Diego flights

Boston–San Diego fares hover around $168 median over a recent 12-day sample, with most prices falling between $151–$171.

Fares cluster near $168 — but a rare $122 dip did occur

Key takeaways

Median fare sits at $168, with the bulk of observed prices (p25–p75) packed tightly between $151 and $171
Low of $122 shows occasional deep discounts exist, but it's an outlier versus the typical range
High of $177 is close to median, meaning even 'expensive' days aren't dramatically worse
45% spread looks large on paper, but it's driven mostly by that single low fare — most days trade in a narrow band
Sample is based on just 12 days of snapshots, so treat patterns as directional, not definitive

30-day price trend

BOS → SAN · cheapest cached fare per day · last 13 days · ↑ 40%

$122 low$177 high

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

The full picture

Over the 12-day window we tracked, Boston to San Diego fares were remarkably consistent: the middle 50% of prices (p25 to p75) ranged from just $151 to $171, clustered tightly around the $168 median. The headline 45% spread sounds dramatic, but it's almost entirely explained by one low outlier at $122 — without it, the data suggests a route that doesn't swing wildly day to day. Budget around $168 as your realistic target, with $151 as an optimistic floor and $177 as a worst-case ceiling.

We don't have enough historical depth here to say definitively when in the booking window prices soften — 12 data points is a snapshot, not a trend line. What we can say is that the narrow gap between p25 and p75 implies this route doesn't reward obsessive timing the way more volatile markets do. If you see a fare near or below the $151 mark, that's already bottom-quartile territory worth taking rather than waiting for a hoped-for discount that the data doesn't clearly support.

We don't have carrier-level visibility in this dataset, so we can't speak to whether a dominant airline is driving the pricing pattern or whether budget carriers are pulling the low end down. The honest takeaway: this looks like a stable-priced route with limited upside from waiting, but with only 12 days sampled, we'd want a longer window before calling this a reliable seasonal pattern rather than a short-term lull.

Ready to look at fares?

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

Related travel pages

Why we regenerated this article: Bottom quartile ↑ 24% ($122 → $151). 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.