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Sunday, October 11 · typical odds for a Sunday (too early for a weather forecast) · issued Mon 8:00 PM ET · 23 nonstops

Sun, Oct 11: WN 4979 at 06:50 is the safest bet, 5% chance of being 15+ min late; evening flights run 34–57%.

Safest bet that day WN 4979 FLL 06:50 → MDW 09:07 · 5% chance 15+ min late Riskiest AA 3304 MIA 17:02 → ORD 19:42 · 57% chance 15+ min late · usually 49% on time

Every nonstop on Sun, Oct 11

12-month record →

Ranked by the chance of arriving 15+ minutes late (typical odds: the weather this date has had in past years), with each flight’s on-time record over Aug 2025 – Jul 2026 beside it. Times are local. Pick a flight for its forecast. Click a column to sort.

WN 4979 Southwest FLL 06:50 MDW 09:07 5% 2% 0.7% no record
UA 2809 United FLL 06:53 ORD 09:20 10% 4% 0.8% no record
AA 581 American Flight history → MIA 06:40 ORD 09:08 10% 5% 0.8% 87%
AA 2738 American FLL 08:42 ORD 11:03 16% 6% 1.0% no record
AA 3076 American MIA 08:22 ORD 10:49 18% 7% 1.1% no record
WN 1927 Southwest FLL 11:05 MDW 13:21 28% 8% 1.9% no record
AA 2634 American Flight history → MIA 22:12 ORD 00:36 34% 16% 1.8% 70%
UA 1983 United Flight history → MIA 12:30 ORD 15:13 36% 18% 2.8% 82%worse than usual
UA 651 United Flight history → FLL 19:37 ORD 22:20 36% 20% 1.1% 66%
UA 1755 United Flight history → FLL 12:26 ORD 14:55 37% 17% 1.4% 87%worse than usual
AA 483 American Flight history → MIA 21:18 ORD 23:31 41% 18% 1.6% 79%worse than usual
AA 835 American MIA 13:02 ORD 15:27 41% 21% 3.1% no record
AA 1443 American Flight history → FLL 13:32 ORD 15:58 42% 19% 2.9% 89%worse than usual
WN 1928 Southwest FLL 18:06 MDW 20:23 45% 14% 3.0% no record
UA 403 United Flight history → FLL 16:20 ORD 19:00 46% 24% 1.3% 52%
B6 863 JetBlue Flight history → FLL 21:05 ORD 23:44 49% 27% 2.5% 48%
B6 663 JetBlue Flight history → FLL 11:00 ORD 13:39 49% 22% 4.0% 71%worse than usual
F9 2206 Frontier Flight history → FLL 12:10 ORD 14:40 49% 22% 3.6% 69%worse than usual
WN 3714 Southwest MIA 15:02 MDW 17:06 50% 13% 3.9% no record
UA 2106 United Flight history → MIA 16:10 ORD 18:53 51% 27% 2.5% 59%
AA 2194 American Flight history → MIA 18:52 ORD 21:19 56% 29% 4.7% 62%worse than usual
AA 3056 American Flight history → MIA 17:00 ORD 19:53 56% 27% 5.1% 60%worse than usual
AA 3304 American Flight history → MIA 17:02 ORD 19:42 57% 27% 5.1% 49%
How these are worked out. Each flight’s odds are our forecast for that day (typical odds until the weather forecast covers it); flights of airlines we don’t forecast yet use their 12-month record and are marked. Makes the connection: the first flight’s 12-month lateness curve, scaled so its chance of arriving 15+ min late matches the day’s forecast, at the layover minus the 45-minute minimum (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled × second flight within 15 minutes, each from the day’s forecast.

About this data: forecast odds from our model for Sun, Oct 11 (newest published update); 12-month records from US DOT on-time data, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. JSON