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

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

No clear winner: Frontier’s IAD → MIA flights land within a few points of 7 in 10 on time whatever the hour.

Best time to leave 3–4 pm 78% arrive on time from IAD

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).

IAD

% 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

Pick an hour to see this route’s flights leaving then.

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	IAD	MIA	2h 52m	69%	1.8%	113	Not flying now

Alternatives with one stop

All connections →


Frontier Details →	IAD 07:30 → ATL 09:44F9 4707	2h 03m Atlanta	ATL 11:47 → MIA 13:53F9 4406	6h 19m	92%	67%
Frontier Details →	IAD 11:17 → ATL 13:18F9 1081	1h 11m Atlanta	ATL 14:29 → MIA 16:33F9 2272	5h 16m	80%	52%

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