Route on-time record
PIT to ORD: most on-time flights and the best time to fly
Pittsburgh (Pittsburgh International Airport) to Chicago (Chicago O'Hare International Airport). 3,912 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 1.8% were cancelled. The most reliable flight number was Republic 4377 at 6:12 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
PIT → ORD
Pittsburgh to Chicago: 3,912 nonstop flights a year
On time (12 months)
78%
Cancelled
1.8%
avg delay 21 min
Best time to leave
Before 9 AM
88% on time vs 59% 6 to 9 PM
Most reliable airline
Republic
82% chance on time
Lowest nonstop fare seen in the next two months: $145 (American 3239 on 2026-11-07). 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 · Republic 4377 · sold as American Eagle, Delta Connection or United Express
6:12 AM → 7:10 AM1h 58m nonstop
Local times, typical schedule. Last flown 2026-05-20.
91%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 93% of the time (44 flights, Jun 2025 to May 2026).
- Never cancelled in 44 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 88% on time; 6 to 9 PM: 59%).
- Short track record (44 flights), so its score leans on the airline's record at this hour.
Limited track record · 44 flights
Find 6:12 AM flight fares Opens this date on Aviasales#2 · Republic 4427 · sold as American Eagle, Delta Connection or United Express
6:00 AM → 6:55 AM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 88% on time; 6 to 9 PM: 59%).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find 6:00 AM flight fares Opens this date on Aviasales#3 · Republic 3461 · sold as American Eagle, Delta Connection or United Express
8:54 AM → 9:50 AM1h 57m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.8%
- Avg arrival delay
- 8 min
- Arrived on time 89% of the time (358 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 88% on time; 6 to 9 PM: 59%).
Strong track record · 358 flights
Find 8:54 AM flight fares Opens this date on Aviasales#4 · Republic 4625 · sold as American Eagle, Delta Connection or United Express
7:59 AM → 9:00 AM2h 01m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 90% of the time (10 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 88% on time; 6 to 9 PM: 59%).
- Short track record (10 flights), so its score leans on the airline's record at this hour.
Limited track record · 10 flights
Find 7:59 AM flight fares Opens this date on Aviasales#5 · Republic 4478 · sold as American Eagle, Delta Connection or United Express
11:43 AM → 12:38 PM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 16 min
- Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
- 100% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find 11:43 AM flight fares Opens this date on Aviasales#6 · Republic 4481 · sold as American Eagle, Delta Connection or United Express
11:35 AM → 12:28 PM1h 53m nonstop
Local times, typical schedule. Last flown 2026-05-20.
87%
chance on time
- On time (history)
- 88%
- Cancelled
- 2.3%
- Avg arrival delay
- 8 min
- Arrived on time 88% of the time (43 flights, Jun 2025 to May 2026).
- Short track record (43 flights), so its score leans on the airline's record at this hour.
Limited track record · 43 flights
Find 11:35 AM flight fares Opens this date on Aviasales#7 · United 1803
7:00 AM → 7:49 AM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
- On time (history)
- 87%
- Cancelled
- 1.8%
- Avg arrival delay
- 15 min
- Arrived on time 87% of the time (159 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 88% on time; 6 to 9 PM: 59%).
Moderate track record · 159 flights
Find United 1803 fares Opens this date on Aviasales#8 · Republic 4480 · sold as American Eagle, Delta Connection or United Express
10:00 AM → 10:55 AM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
- On time (history)
- 88%
- Cancelled
- 2.3%
- Avg arrival delay
- 5 min
- Arrived on time 88% of the time (42 flights, Jun 2025 to May 2026).
- Short track record (42 flights), so its score leans on the airline's record at this hour.
Limited track record · 42 flights
Find 10:00 AM flight fares Opens this date on Aviasales#9 · United 1413
10:49 AM → 11:35 AM1h 46m nonstop
Local times, typical schedule. Last flown 2026-04-29.
86%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 22 min
- Arrived on time 90% of the time (21 flights, Jun 2025 to May 2026).
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find United 1413 fares Opens this date on Aviasales#10 · American 2129
6:30 AM → 7:23 AM1h 53m nonstop
Local times, typical schedule. Last flown 2026-04-06.
85%
chance on time
- On time (history)
- 92%
- Cancelled
- 4.0%
- Avg arrival delay
- 14 min
- Arrived on time 92% of the time (24 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 88% on time; 6 to 9 PM: 59%).
- 75% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find American 2129 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Republic Airways (sold as American Eagle, Delta Connection or United Express)82%
1,550 flights · 84% on time as flown · 1.5% cancel
- Envoy Air (sold as American Eagle)78%
247 flights · 81% on time as flown · 2.2% cancel
- United Airlines76%
1,264 flights · 77% on time as flown · 1.6% cancel
- American Airlines70%
600 flights · 70% on time as flown · 2.5% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)63%
251 flights · 62% on time as flown · 2.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM88%
1,376 flights · avg delay 11 min
- 9 AM to noon86%
717 flights · avg delay 17 min
- Noon to 3 PM76%
532 flights · avg delay 21 min
- 3 to 6 PM66%
846 flights · avg delay 32 min
- 6 to 9 PM59%
436 flights · avg delay 38 min
Smarter routing
Nearby airports that run more on time
PIT → MDW 79% chance on time
Pittsburgh International Airport to Chicago Midway International Airport · 1,150 flights a year · 15 mi from your airports · yours: 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
- Air traffic control and airport volume40%
- Late-arriving aircraft31%
- Airline (crew, maintenance, boarding)24%
- Severe weather6%
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
PIT to ORD questions
- What time of day is best to fly PIT to ORD?
- Before 9 AM: 88% of flights arrived on time, against 59% 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 PIT to ORD?
- Republic, with a season-adjusted 82% chance of operating and arriving on time over 1,550 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 PIT to ORD?
- July (75% on time); the best was February (89%), 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 PIT
- ORD to PIT (return)
- PIT to LGA 80%
- PIT to ATL 90%
- PIT to MCO 79%
- PIT to BOS 79%
- PIT to CLT 84%
- PIT to EWR 87%
- PIT to JFK 87%
- PIT to DEN 81%
- PIT to DFW 79%
- PIT to DCA 69%
- PIT to IAD 88%
- PIT to PHL 75%
Live status: FAA delays and ground stops