3,695 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 93% depart on time. After 4 pm it’s 3 in 5.

Best time to leave 5–6 am 96% arrive on time from DEN

Best single flight F9 3302 DEN 16:10 → STL 19:23 · 85% on time Avoid UA 1422 DEN 17:34 → STL 20:43 · 72% 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

St Louis flights leaving DEN 5–6 am: 1Close ×


WN 1751	DEN 05:35	STL 08:35	2h 05m	50	90%	0.0%	46 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.


Frontier	291	85%	0.3%	51 min
United (incl. SkyWest)	1,210	80%	0.3%	63 min
Southwest	2,194	77%	0.5%	60 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.


F9 3302	DEN 16:10	STL 19:23	85%
UA 652	DEN 09:35	STL 12:42	84%
UA 1422	DEN 17:34	STL 20:43	72%

All 16 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.


Frontier	DEN	STL	2h 12m	85%	0.3%	291	Flying now
United	DEN	STL	2h 09m	80%	0.3%	1,210	Flying now
Southwest	DEN	STL	2h 05m	77%	0.5%	2,194	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