Route on-time record
ORD to SJC: most on-time flights and the best time to fly
Chicago (Chicago O'Hare International Airport) to San Jose (Norman Y. Mineta San Jose International Airport). 301 nonstop flights in Jun 2025 to May 2026, 64% arrived within 15 minutes and 1.3% were cancelled. The most reliable flight number was United 605 at 3:35 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
ORD → SJC
Chicago to San Jose: 301 nonstop flights a year
On time (12 months)
64%
Cancelled
1.3%
avg delay 28 min
Best time to leave
3 to 6 PM
84% on time vs 59% 6 to 9 PM
Most reliable airline
United
63% chance on time
Lowest nonstop fare seen in the next two months: $236 (United 1325 on 2026-11-15). 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 605
3:35 PM → 6:31 PM4h 56m nonstop
Local times, typical schedule. Last flown 2026-05-20.
72%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (9 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (3 to 6 PM: 84% on time; 6 to 9 PM: 59%).
- Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (9 flights), so its score leans on the airline's record at this hour.
Limited track record · 9 flights
Find United 605 fares Opens this date on Aviasales#2 · United 2472
8:00 PM → 10:56 PM4h 56m nonstop
Local times, typical schedule. Last flown 2026-05-18. Same departure also flew as United 1564; its record covers all of them.
65%
chance on time
- On time (history)
- 69%
- Cancelled
- 2.8%
- Avg arrival delay
- 24 min
- Arrived on time 69% of the time (35 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 59% on time; 3 to 6 PM: 84%).
- 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 (35 flights), so its score leans on the airline's record at this hour.
Limited track record · 35 flights
Find United 2472 fares Opens this date on Aviasales#3 · United 481
7:50 PM → 10:35 PM4h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 1325; its record covers all of them.
58%
chance on time
- On time (history)
- 56%
- Cancelled
- 0.0%
- Avg arrival delay
- 29 min
- Arrived on time 56% of the time (39 flights, Jun 2025 to May 2026).
- Never cancelled in 39 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 59% on time; 3 to 6 PM: 84%).
- Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 39 flights
Find United 481 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines63%
293 flights · 63% on time as flown · 1.4% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- 3 to 6 PM84%
37 flights · avg delay 10 min
- 6 to 9 PM59%
253 flights · avg delay 32 min
Best day: Monday (75%). Worst: Friday (68%).
Smarter routing
Nearby airports that run more on time
MDW → SJC 70% chance on time
Chicago Midway International Airport to Norman Y. Mineta San Jose International Airport · 545 flights a year · 15 mi from your airports · yours: 63%
ORD → SFO 69% chance on time
Chicago O'Hare International Airport to San Francisco International Airport · 5,607 flights a year · 30 mi from your airports · yours: 63%
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 aircraft52%
- Airline (crew, maintenance, boarding)32%
- Air traffic control and airport volume9%
- Severe weather7%
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 SJC questions
- What time of day is best to fly ORD to SJC?
- 3 to 6 PM: 84% of flights arrived on time, against 59% for departures 6 to 9 PM.
- Which airline is most on time from ORD to SJC?
- United, with a season-adjusted 63% chance of operating and arriving on time over 293 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 SJC?
- June (46% 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
- SJC 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