Chicago → Dublin flights

Chicago–Dublin: Target $279 but watch for $159 outliers

Key takeaways

• Median fare is $279 across 30 daily cached-fare snapshots — a reasonable planning baseline.
• The lowest recorded fare was $159 — roughly 43% below median — signaling genuine sale inventory exists on this route.
• 25% of sampled fares were at or below $159 (p25), so bottom-quartile pricing is not a one-off anomaly.
• The 96% spread between low ($159) and high ($311) is exceptionally wide, meaning the timing of your search and purchase matters more than on tighter-spread routes.
• $297 is the p75 threshold — if you're seeing fares above that level, you're in the pricier quarter of the observed range and may benefit from waiting or adjusting travel dates.

30-day price trend

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

The full picture

The ORD–DUB route shows an unusually wide price distribution. With a 96% spread between the floor ($159) and ceiling ($311), this is not a route where fares cluster predictably — it's one where the difference between a good booking and a great one can exceed $150. The median of $279 is a useful anchor: fares at or near that level represent a roughly average outcome based on 30 days of snapshot data. But with a full quarter of observations at $159 or below, there's a meaningful probability of catching a lower fare if you have flexibility and patience.

On transatlantic routes generally, fares tend to soften in two windows: 3–6 months before departure (when carriers seed inventory at promotional prices to stimulate early demand) and occasionally within 3 weeks of departure (when unsold seats get discounted). The $159 low captured in this dataset is consistent with a promotional-fare release rather than last-minute distress pricing — which suggests that monitoring fares starting around the 3–5 month mark ahead of travel is a reasonable strategy for this corridor. Setting a fare alert at or below $220 would put you comfortably in the bottom quartile of observed pricing.

No dominant carrier pattern is identifiable from the data provided, so it would be speculative to name a specific airline as the consistent low-fare driver on this route. What the spread does imply is that not all carriers price in lockstep here — worth cross-checking at least two booking platforms when you search. One honest caveat: 30 snapshots reflect cached fares at the moment of collection and may not capture every departure date or cabin mix equally. Treat $279 as a planning number and $159 as an aspirational target, not a guarantee.

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