Southwest Airlines PHX to IAD on-time performance
Southwest Airlines nonstop flights from Phoenix to Washington · Aug 2025 – Jul 2026
On-time arrivals
74%
arrived < 15 min late
Cancelled
0.3%
1 flights
Avg arrival delay
12 min
38 min when late
Rank on route
#2 of 2
route average 86% on time
Key facts
- Southwest Airlines flights on PHX to IAD arrived on time 74% of the time in Aug 2025 – Jul 2026.
- 0.3% were cancelled, and 3% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 86% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (46%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)46%
- Air traffic control & airport congestion22%
- Late-arriving aircraft21%
- Security10%
- Extreme weather0%
Other airlines on PHX to IAD
- United Airlines91% on time · 8 min avg delay
Full PHX to IAD comparison →
Southwest Airlines on-time record across all routes →
306 Southwest Airlines flights tracked on this route; 1 cancelled, 2 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.