Washington → Dublin flights

Target $334–$355 for Washington–Dublin — and watch for dips to $277

Key takeaways

• Median fare is $355 across 30 daily snapshots — a reasonable baseline for budgeting this transatlantic hop.
• Bottom-quartile fares sit at $334 or below — if you see something in that range, it's historically a strong deal worth acting on.
• The absolute low of $277 does appear in the data, but it's an outlier; plan around $334–$355, treat $277 as a lucky catch.
• The spread is 111% — the gap between low and high ($277–$584) is wide, meaning timing and flexibility matter significantly on this route.
• Upper-quartile fares reach $478+, so waiting too long or booking without price-tracking risks paying 35% above the median.

30-day price trend

See full numbers and stats on the DCA → DUB price history page.

The full picture

The Washington DCA–Dublin route shows a notably wide price distribution across our 30-day snapshot window. With a spread of 111% — meaning the high ($584) is more than double the low ($277) — this is not a route where you can book casually and expect a fair price. The interquartile range of $334 to $478 is the most instructive figure here: roughly half of all observed fares fall in that $144 window, and the median of $355 sits comfortably in the lower half of that band. That tells us genuinely competitive fares do appear with some regularity, but so do significantly inflated ones.

On a transatlantic route of this length, fare behavior typically rewards a booking window of 6–10 weeks out from departure. Fares in the sub-$334 range (the bottom quartile) tend to surface either well in advance — when carriers are seeding inventory — or occasionally in short-lived promotional windows. The $277 floor in our data is real but uncommon; building a budget around it would be optimistic. A more defensible strategy is to set a price alert at $340 and treat anything at or below the $334 p25 threshold as a genuine buying signal.

The data does not break out carrier-level detail for this route, so we can't confirm whether a single airline is driving the low-end fares or whether the spread reflects competition between multiple carriers. What the 111% spread does imply is meaningful price volatility — more than you'd see on a mature domestic route (typically 30–50%). That volatility cuts both ways: it creates real savings opportunities, but also real overpayment risk. One honest caveat: 30 daily snapshots capture a single rolling window and may not reflect seasonal peaks like summer or holiday travel, when DCA–DUB fares historically compress toward the high end of any observed range.

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