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San Francisco → San Diego flights

Across 12 snapshots, SFO to SAN fares held flat at a median of $19 — no clear booking window matters at this spread.

SFO–SAN has shown one price: $19, with zero variance

Key takeaways

$19 was the price in every one of the 12 snapshots recorded — low, median, and high are identical.
0% spread means there's no evidence of cheaper or more expensive windows to chase.
Sample size is thin — only 12 days observed, so this may not reflect the full booking calendar.
No carrier or day-of-week pattern is visible, since the fare hasn't moved at all.
At this price point, timing strategy is unlikely to save you anything further.

30-day price trend

SFO → SAN · cheapest cached fare per day · last 13 days · → flat

$19 low$19 high

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

The full picture

The data for SFO–SAN is unusual: across all 12 snapshots collected, the fare was exactly $19 every time. There's no spread between the low, median, and high — a flat line rather than a range. That's a strong signal this route is priced as a loss-leader or promotional fare, though we can't confirm the cause from pricing data alone.

Because there's zero variance, we can't offer any meaningful guidance on booking windows, soft periods, or day-of-week effects — there's simply nothing to compare. Any advice about booking early versus late would be fabricated; the honest takeaway is that price has been a non-factor here for the period observed.

One caveat worth stressing: 12 snapshots is a short window, and a fare this flat is atypical for air travel. It's possible this reflects a temporary promotional rate, a data-caching quirk, or a route with unusually stable low-cost-carrier pricing. We'd treat this result with some caution and revisit it once more snapshots accumulate — if the fare holds at $19 over a longer window, that's a genuinely remarkable deal; if it was a short-lived promo, the price could shift without warning.

Ready to look at fares?

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

Related travel pages

Why we regenerated this article: Snapshot depth changed (5 → 12 samples). 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.