1,037 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

United is clearly ahead here: 9 in 10 of its flights arrive on time, 16 points better than Southwest.

Best time to leave 11 pm–12 am 95% arrive on time from PHX

Best single flight UA 1873 PHX 08:50 → IAD 16:17 · 92% 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).

PHX

% 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.

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	731	91%	0.8%	73 min
Southwest	306	75%	0.3%	39 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 1873	PHX 08:50	IAD 16:17	92%

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	PHX	IAD	4h 21m	91%	0.8%	731	Flying now
Southwest	PHX	IAD	4h 15m	75%	0.3%	306	Not flying now

Alternatives with one stop

All connections →


Delta Details →	PHX 23:59 → ATL 06:39DL 929	1h 04m Atlanta	ATL 07:43 → IAD 09:26 +1DL 1324	6h 29m	89%	76%

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