Boston → Lisbon flights

Median sits at $306–389 — but outlier fares spike toward $628

Key takeaways

• Median fare is $324, a solid benchmark for budgeting this route
• Bottom quartile fares ($306–$389) represent the typical booking range most travelers will see
• High-end fares reach $628, more than double the low of $306 — a 105% spread
• Only 12 snapshots were sampled, so this read is directional, not definitive
• No dominant carrier was identifiable in the data, so airline-specific patterns can't be confirmed

30-day price trend

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

The full picture

The data shows a wide gulf between typical and worst-case pricing on Boston to Lisbon. Most fares land in a tight band between $306 and $389 — the bottom quartile — which likely reflects the standard pricing travelers encounter most days. But the high end of $628 shows that less favorable fares do surface, pulling the overall spread to 105%. That kind of range suggests this route has real volatility, possibly tied to seasonal demand, limited seat availability on lower fare classes, or capacity changes with the holidays or summer peak. When the gap between median and high is this large, it's worth treating the high-end numbers as something to avoid rather than expect.

With only 12 daily snapshots, we don't have enough of a booking-horizon trend to say with confidence when in the advance-purchase window prices typically soften. What we can say is that if you're seeing a quote near the $306–$389 range, you're in line with the bulk of recent fares and there's little reason to hold out for something dramatically better. If a quote comes in north of $450 or so, it's an outlier relative to what this data shows, and it may be worth checking alternate dates or waiting a few days to see if pricing resets toward the median.

There isn't enough carrier-level detail in this dataset to identify a dominant airline or day-of-week pattern, so no claims can be made there. The honest caveat: with a sample size this thin (12 days) and a spread this wide (105%), this snapshot is a useful gut-check on typical pricing, not a precise forecast. Treat the $306–$389 band as your realistic target, and treat anything near $628 as a reminder that this route can get expensive under the wrong circumstances.

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• When to book
  Boston → Lisbon
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  Boston → Lisbon
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  🇵🇹 Portugal
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• When to book
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