Best Time to Book

Chicago → Vienna flights

Median Chicago to Vienna fare is $366 over a recent 12-day sample; most prices cluster near the low end, so book when you see $360s-$490s.

Chicago–Vienna fares typically hover near $366, with spikes possible

Key takeaways

Median fare sits at $366, close to the observed floor of $363
Bottom quartile (p25) is $363, meaning a sizable share of fares land right near the lowest price seen
Top quartile (p75) jumps to $494, and the high end reaches $759 — a sign that some snapshots caught premium or less flexible fares
Spread of 109% between low and high is wide, so timing and fare class matter more than usual on this route
Sample is thin at 12 days, so treat these as directional patterns, not guarantees

30-day price trend

ORD → VIE · cheapest cached fare per day · last 13 days · ↑ 1%

$363 low$759 high

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

The full picture

The data shows a Chicago–Vienna fare range anchored by a low of $363 and a ceiling of $759 — a spread of 109% that's wide even by international long-haul standards. With the median at $366 sitting just above the low and the 25th percentile at $363, it's clear that a good number of the snapshots we captured were clustered near the floor. The $494 mark at the 75th percentile and the $759 high suggest that occasional snapshots caught pricier fare buckets, possibly driven by limited availability in lower fare classes or last-minute inventory on certain dates.

Because our sample only covers 12 days, we can't responsibly point to a specific booking window within the horizon where prices reliably soften — that would require a longer rolling history to confirm a pattern with confidence. What we can say is that the bulk of observed fares were close to $366, implying that if you're seeing a quote in the $360s–$400s, you're likely near the favorable end of this route's typical range rather than the exception.

We don't have enough visibility into carrier-level data here to identify a dominant airline or day-of-week effect, so we won't speculate on either. The honest takeaway: this route's pricing is more volatile than most, with a long tail toward $700+ fares, but the center of gravity is still close to $366. Given the small sample size, treat the $363–$494 band as your realistic planning range, and be aware that fares above $500 are outliers in what we've observed so far rather than the norm.

Ready to look at fares?

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

Related travel pages

Why we regenerated this article: Top quartile ↑ 36% ($363 → $494). 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 Oct 10, 2026. Fares shift continuously — confirm at booking.