United AirlinesUA
Flights UA5318 19:00 Sa Su · UA5630 19:00 Sa Su
live
Direct flights from Nantucket (ACK) to Chicago (ORD): 2 nonstop departures observed each week across 1 airline. The median arrival is 187 minutes late. No cancellations were recorded across the 2 tracked flights. The nonstop covers 1,483 km, an estimated 2 hours 24 minutes in the air. Measured by Pro Flight Search from live flight boards at Nantucket and Chicago. Updated 15 September 2026 at 04:37 UTC.
ACK
Nantucket
tracking
ORD
Chicago
disrupted · +120
1,483 km · ~2h 24m est.
Disrupted · 1 airline · 2x weekly · nonstop
0 / 100
route health from live ACK and ORD delay boards
Median arrival delay is +187 min. 0 of 2 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+187 minacross the last 2 operated legs
Flight time~2h 24mestimated from route distance
Weekly departures2x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
United Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsnext sweep in 120s
How the Nantucket to Chicago route actually runs
Pro Flight Search records official board updates for nonstop ACK to ORD flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Nantucket (ACK) to Chicago (ORD) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/ACK-ORD
ACK to ORD questions
Is ACK–ORD running on time right now?
High disruption likely. The arrival side at ORD is the weaker end, route health score 0/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from ACK to ORD?
Great-circle distance is 1,483 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 135–157 min gate-to-gate on this route.
How often does ACK–ORD fly?
United Airlines runs the route with about 4 flights a week (sat–sun). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at ACK and arrival-side delay at ORD, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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