Route on-time record
ORD to RAP: most on-time flights and the best time to fly
Chicago (Chicago O'Hare International Airport) to Rapid City (Rapid City Regional Airport). 685 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 2.2% were cancelled. The most reliable flight number was United 2847 at 8:45 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
ORD → RAP
Chicago to Rapid City: 685 nonstop flights a year
On time (12 months)
74%
Cancelled
2.2%
avg delay 16 min
Best time to leave
Before 9 AM
86% on time vs 54% 6 to 9 PM
Most reliable airline
United
82% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · United 2847
8:45 AM → 10:24 AM2h 39m nonstop
Local times, typical schedule. Last flown 2026-05-31.
90%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 86% on time; 6 to 9 PM: 54%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find United 2847 fares Opens this date on Aviasales#2 · Envoy 3767 · sold as American Eagle
1:19 PM → 2:53 PM2h 34m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (11 flights, Jun 2025 to May 2026).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find 1:19 PM flight fares Opens this date on Aviasales#3 · United 466
9:06 AM → 10:36 AM2h 30m nonstop
Local times, typical schedule. Last flown 2026-04-26.
81%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 78% of the time (9 flights, Jun 2025 to May 2026).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Short track record (9 flights), so its score leans on the airline's record at this hour.
Limited track record · 9 flights
Find United 466 fares Opens this date on Aviasales#4 · Envoy 3766 · sold as American Eagle
9:45 AM → 11:19 AM2h 34m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Envoy 4040; its record covers all of them.
80%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 84% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Short track record (55 flights), so its score leans on the airline's record at this hour.
Limited track record · 55 flights
Find 9:45 AM flight fares Opens this date on Aviasales#5 · SkyWest 4726 · sold as United Express, Delta Connection, American Eagle or Alaska
7:50 PM → 9:37 PM2h 47m nonstop
Local times, typical schedule. Last flown 2026-05-31.
58%
chance on time
- On time (history)
- 73%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 73% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 54% on time; Before 9 AM: 86%).
- Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
- 53% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 11 flights
Find 7:50 PM flight fares Opens this date on Aviasales#6 · SkyWest 5406 · sold as United Express, Delta Connection, American Eagle or Alaska
8:05 PM → 9:46 PM2h 41m nonstop
Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as SkyWest 5601; its record covers all of them.
55%
chance on time
- On time (history)
- 61%
- Cancelled
- 10.2%
- Avg arrival delay
- 27 min
- Arrived on time 61% of the time (44 flights, Jun 2025 to May 2026).
- Cancelled 10.2% of the time (5 of 49).
- Leaves in this route's least on-time window (6 to 9 PM: 54% on time; Before 9 AM: 86%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
Limited track record · 44 flights
Find 8:05 PM flight fares Opens this date on Aviasales#7 · SkyWest 4731 · sold as United Express, Delta Connection, American Eagle or Alaska
9:05 AM → 10:45 AM2h 40m nonstop
Local times, typical schedule. Last flown 2026-05-20.
54%
chance on time
- On time (history)
- 43%
- Cancelled
- 0.0%
- Avg arrival delay
- 19 min
- Arrived on time 43% of the time (21 flights, Jun 2025 to May 2026).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find 9:05 AM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines82%
178 flights · 87% on time as flown · 1.6% cancel
- Envoy Air (sold as American Eagle)75%
264 flights · 76% on time as flown · 1.3% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)61%
243 flights · 61% on time as flown · 3.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM86%
214 flights · avg delay 10 min
- 9 AM to noon73%
219 flights · avg delay 13 min
- 3 to 6 PM69%
100 flights · avg delay 17 min
- 6 to 9 PM54%
138 flights · avg delay 30 min
Best day: Saturday (84%). Worst: Wednesday (77%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft33%
- Airline (crew, maintenance, boarding)31%
- Air traffic control and airport volume28%
- Severe weather8%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
ORD to RAP questions
- What time of day is best to fly ORD to RAP?
- Before 9 AM: 86% of flights arrived on time, against 54% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from ORD to RAP?
- United, with a season-adjusted 82% chance of operating and arriving on time over 178 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on ORD to RAP?
- December (57% on time); the best was September (87%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from ORD
- RAP to ORD (return)
- ORD to LGA 67%
- ORD to BOS 68%
- ORD to LAX 74%
- ORD to DFW 70%
- ORD to DCA 69%
- ORD to MCO 73%
- ORD to ATL 74%
- ORD to MSP 69%
- ORD to DEN 74%
- ORD to IAH 75%
- ORD to EWR 69%
- ORD to DTW 71%
Live status: FAA delays and ground stops