Best Time to Book

Chicago → Dublin flights

Median Chicago to Dublin fare is $310 over 23 days tracked; expect $279–$345, so book once you see the low $280s.

Chicago–Dublin fares hold near $310 — modest swings, not deep discounts

Key takeaways

Median fare of $310 across 23 daily snapshots — a reasonably stable baseline for this route.
Bottom quartile sits at $279, so fares near this level are worth booking rather than waiting for a bigger drop.
Top quartile reaches $345, meaning even 'expensive' days on this route aren't dramatically higher than typical.
24% spread between low and high is moderate — there's some room to save, but no evidence of extreme volatility.
Sample size of 23 days gives a reasonably solid read, though it's short of a full 30-day cycle.

30-day price trend

ORD → DUB · cheapest cached fare per day · last 21 days · ↑ 11%

$279 low$345 high

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

The full picture

The Chicago–Dublin fare data shows a fairly tight band: a $279 low, a $345 high, and a median of $310. That's a 24% spread — enough to reward timing, but not so wide that waiting will likely net a dramatic discount. If you see a fare in the high $270s to low $280s, that's already sitting at the bottom quartile of what we've observed, and it's a reasonable signal to book rather than hold out for something meaningfully lower.

We don't have booking-horizon data (i.e., how price changes as departure approaches), only a 23-day rolling window of cached fares. Within that window, prices didn't show wild single-day spikes — they moved steadily between roughly $280 and $345. That pattern suggests demand and pricing for this route are fairly consistent day to day, rather than driven by sudden fare-sale cycles. Travelers should treat any price at or below the $310 median as a fair deal, and anything approaching $279 as a strong one.

No dominant carrier was identifiable in this dataset, and no clear day-of-week pattern emerged from the snapshots we have — so we won't speculate about which weekday to search on, since that kind of claim isn't well-supported by this data. The honest caveat: 23 days is a decent but not exhaustive sample, and it reflects cached fares rather than live booking outcomes, so treat these numbers as a directional guide rather than a guarantee of what you'll see at checkout.

Ready to look at fares?

Search ORD → DUB on Aviasales →See the price history →

Related travel pages

Why we regenerated this article: Price spread tightened by 87 points. 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 Sep 19, 2026. Fares shift continuously — confirm at booking.