Showing Frontier only (incl. its regional partners)All airlines ×

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

No clear winner: Frontier’s STL → PHX flights land within a few points of 83% on time whatever the hour.

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.

No Frontier flight on this route ran 150+ times in the year.

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	STL	PHX	3h 33m	83%	1.9%	53	Not flying now

Alternatives with one stop

All connections →


Frontier Details →	STL 19:03 → DFW 21:00F9 4741	1h 20m Dallas-Fort Worth	DFW 22:20 → PHX 22:59F9 4655	5h 53m	87%	63%
Frontier Details →	STL 19:10 → LAS 20:43F9 2017	1h 05m Las Vegas	LAS 21:48 → PHX 23:05F9 1896	5h 55m	78%	58%

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