Washington → Dublin flights

Target $372 on DCA–Dublin, but watch for dips near $257

Key takeaways

• Median fare is $372, based on 17 daily snapshots of the cheapest available fares on this route.
• Bottom-quartile fares sat at $257 (p25), meaning roughly one in four observations came in at or below that level — a meaningful target if your dates are flexible.
• Top-quartile fares hit $418 (p75), so budgeting above $420 puts you in the pricier half of what this window captured.
• The spread is 101% — the gap between the lowest ($257) and highest ($517) observed fare is more than double the low, signaling genuine volatility and real upside to timing your purchase carefully.
• Sample size is 17 days, which is on the thinner side; treat these figures as directional rather than definitive.

30-day price trend

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

The full picture

Washington Dulles/Reagan to Dublin is a transatlantic route with meaningful price variability: the 17 daily snapshots recorded here span $257 to $517, a spread of roughly 101%. That's a wide band for a single route, suggesting fares on this corridor respond noticeably to demand shifts, seat availability, and how far out you're booking. The median of $372 is a reasonable planning anchor, but the p25 floor of $257 shows that materially cheaper fares do appear — they're just not the norm. If your travel dates are fixed, $372 is a defensible budget; if you have flexibility of even a week or two, holding out for something closer to $300 is grounded in what this data shows.

On a route like DCA–Dublin, transatlantic pricing typically softens earliest in the booking window (roughly 3–6 months out for peak season, somewhat closer for shoulder periods) and again during brief fare-sale windows that are hard to predict. The high of $517 likely reflects last-minute or peak-demand captures, while the $257 low probably corresponds to an off-peak or promotional fare caught early. The interquartile range ($257–$418) is the most reliable zone to plan around: expect to pay somewhere in that band under typical conditions.

Because the dataset covers only 17 days, day-of-week departure patterns and carrier-specific trends cannot be reliably identified here — drawing conclusions about which weekday is cheapest would overstate what the data supports. What the spread does confirm is that waiting too long carries real cost risk, given a $145 gap between the median and the high.

One honest caveat: 17 snapshots is a thinner sample than ideal for a route with this much variance. Prices on DCA–Dublin are also sensitive to seasonal demand (summer transatlantic bookings compress availability quickly), so these figures should be treated as a useful starting range rather than a precise forecast.

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