Saturday, October 10 · typical odds for a Saturday (too early for a weather forecast) · issued Sun 8:00 PM ET · 7 nonstops

Sat, Oct 10 looks like a normal day here: all 4 nonstops are 8–17% likely to arrive 15+ min late.

Safest bet that day DL 3015 TYS 06:00 → ATL 07:01 · 8% chance 15+ min late · usually 94% on time Riskiest DL 2571 TYS 17:44 → ATL 18:50 · 17% chance 15+ min late · usually 71% on time

Every nonstop on Sat, Oct 10

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. Dimmed: airlines we don’t forecast yet, shown with their 12-month record if they usually fly that weekday.


DL 3015 Delta Flight history →	TYS 06:00	ATL 07:01	8%	3%	0.7%	94%
DL 1817 Delta	TYS 11:36	ATL 12:44	10%	5%	0.7%	no record
DL 1148 Delta Flight history →	TYS 16:05	ATL 17:10	11%	4%	0.7%	83%
DL 2571 Delta Flight history →	TYS 17:44	ATL 18:50	17%	6%	0.9%	71%
DL 5317 Delta flown by Endeavor no forecast: 12-month record	TYS 07:35	ATL 08:46	15%	9%	1.7%	85%
DL 5279 Delta flown by Endeavor no forecast: 12-month record	TYS 08:35	ATL 09:44	26%	16%	0.9%	74%
DL 4724 Delta flown by Endeavor no forecast: 12-month record	TYS 13:59	ATL 15:08	28%	13%	0.0%	72%

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 Sat, Oct 10 (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