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 5–6 pm: 2Close ×


UA 5815flown by SkyWest	DEN 17:50	BHM 21:55	3h 05m	328	80%	0.3%	66 min
UA 4659flown by SkyWest	DEN 17:50	BHM 21:55	3h 05m	35	71%	0.0%	92 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