1,218 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

United is clearly ahead here: 4 in 5 of its flights arrive on time, 13 points better than Southwest.

Best time to leave 11 am–12 pm 92% arrive on time from DEN

Best single flight UA 5815 DEN 17:50 → BHM 21:55 · 80% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

DEN

% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55

Birmingham flights leaving DEN 8–9 pm: 1Close ×


WN 1155	DEN 20:05	BHM 23:42	2h 38m	16	56%	0.0%	114 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.


United (incl. SkyWest)	727	80%	0.3%	62 min
Southwest	491	67%	0.6%	56 min

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.


UA 5815flown by SkyWest	DEN 17:50	BHM 21:55	80%

All 8 flights on this route →

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.


United	DEN	BHM	3h 00m	80%	0.3%	727	Flying now
Southwest	DEN	BHM	2h 35m	67%	0.6%	491	Flying now

Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON