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

Dulles flights leaving PHX 8–9 am: 1Close ×


UA 1873	PHX 08:50	IAD 16:17	4h 27m	347	92%	0.6%	70 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	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