ATIS Alerts Smart Flight Search
Find the flight least likely to be delayed
BetaWe rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.
ORD → SNA
Chicago to Santa Ana: 2,238 nonstop flights a year
On time (12 months)
76%
Cancelled
1.0%
avg delay 14 min
Best time to leave
Before 9 AM
84% on time vs 68% 3 to 6 PM
Most reliable airline
American
75% chance on time
Lowest nonstop fare seen in the next two months: $200 (United 308 on 2026-11-16). 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 308
7:54 PM → 10:35 PM4h 41m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 85% of the time (132 flights, Jun 2025 to May 2026).
- Never cancelled in 137 scheduled flights.
- Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 132 flights
Find United 308 fares Opens this date on Aviasales#2 · American 2679
8:15 AM → 10:41 AM4h 26m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as American 2285; its record covers all of them.
82%
chance on time
- On time (history)
- 84%
- Cancelled
- 1.7%
- Avg arrival delay
- 10 min
- Arrived on time 84% of the time (281 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 3 to 6 PM: 68%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
Strong track record · 281 flights
Find American 2679 fares Opens this date on Aviasales#3 · United 2315
7:40 PM → 10:26 PM4h 46m nonstop
Local times, typical schedule. Last flown 2026-03-27.
81%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 89% of the time (18 flights, Jun 2025 to May 2026).
- 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 (18 flights), so its score leans on the airline's record at this hour.
Limited track record · 18 flights
Find United 2315 fares Opens this date on Aviasales#4 · United 2044
8:50 AM → 11:31 AM4h 41m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 1304; its record covers all of them.
78%
chance on time
- On time (history)
- 77%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 77% of the time (164 flights, Jun 2025 to May 2026).
- Never cancelled in 165 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 3 to 6 PM: 68%).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
Moderate track record · 164 flights
Find United 2044 fares Opens this date on Aviasales#5 · American 519
5:04 PM → 7:31 PM4h 27m nonstop
Local times, typical schedule. Last flown 2026-05-31.
75%
chance on time
- On time (history)
- 77%
- Cancelled
- 1.4%
- Avg arrival delay
- 21 min
- Arrived on time 77% of the time (70 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 68% on time; Before 9 AM: 84%).
- Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 70 flights
Find American 519 fares Opens this date on Aviasales#6 · American 2640
11:50 AM → 2:14 PM4h 24m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as American 2908; its record covers all of them.
73%
chance on time
- On time (history)
- 76%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 76% 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 American 2640 fares Opens this date on Aviasales#7 · American 1179
6:54 PM → 9:39 PM4h 33m nonstop
Local times, typical schedule. Last flown 2026-05-20.
72%
chance on time
- On time (history)
- 74%
- Cancelled
- 3.2%
- Avg arrival delay
- 16 min
- Arrived on time 74% of the time (336 flights, Jun 2025 to May 2026).
- Cancelled 3.2% of the time (11 of 349).
- Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
Strong track record · 336 flights
Find American 1179 fares Opens this date on Aviasales#8 · American 2212
10:03 AM → 12:38 PM4h 35m nonstop
Local times, typical schedule. Last flown 2026-05-20.
70%
chance on time
- On time (history)
- 70%
- Cancelled
- 1.2%
- Avg arrival delay
- 19 min
- Arrived on time 70% of the time (242 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).
Strong track record · 242 flights
Find American 2212 fares Opens this date on Aviasales#9 · United 1317
4:05 PM → 6:46 PM4h 42m nonstop
Local times, typical schedule. Last flown 2026-05-31.
70%
chance on time
- On time (history)
- 70%
- Cancelled
- 0.7%
- Avg arrival delay
- 21 min
- Arrived on time 70% of the time (142 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 68% on time; Before 9 AM: 84%).
- Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 142 flights
Find United 1317 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- American Airlines75%
1,198 flights · 76% on time as flown · 1.6% cancel
- United Airlines75%
1,040 flights · 75% on time as flown · 0.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM84%
557 flights · avg delay 10 min
- 9 AM to noon73%
556 flights · avg delay 16 min
- Noon to 3 PM71%
91 flights · avg delay 16 min
- 3 to 6 PM68%
379 flights · avg delay 20 min
- 6 to 9 PM76%
655 flights · avg delay 13 min
Best day: Tuesday (84%). Worst: Sunday (77%).
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