Route Reliability
Washington → Phoenix
IAD–PHX · 1,956 miles · Washington Dulles International Airport to Phoenix Sky Harbor International Airport
- 80%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 0.8%
- Cancelled
- 1,154
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines85%790 flights
- 2.Southwest Airlines70%364 flights
What the data says
Morning-you made the right choice.
IAD–PHX flights departing between 9 AM–12 PM arrived on time 100% of the time, versus 54% between 6–9 PM.
Skip Wednesday if you can.
IAD–PHX flights arrived on time 85% of the time on Saturdays. On Wednesdays: 76%.
United Airlines runs this route best.
United Airlines arrived on time 85% of the time on this route; Southwest Airlines managed 70%.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon78%(166 flights)
- Tue85%(157 flights)
- Wed76%(159 flights)
- Thu81%(166 flights)
- Fri78%(168 flights)
- Sat85%(160 flights)
- Sun80%(167 flights)
- 3–6 AM—(4 flights)
- 6–9 AM94%(217 flights)
- 9 AM–12 PM100%(15 flights)
- 12–3 PM87%(210 flights)
- 3–6 PM76%(630 flights)
- 6–9 PM54%(67 flights)
Jun 73% → May 85% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 73% | 90 |
| July 2025 | 59% | 90 |
| August 2025 | 84% | 87 |
| September 2025 | 79% | 86 |
| October 2025 | 75% | 97 |
| November 2025 | 76% | 107 |
| December 2025 | 83% | 108 |
| January 2026 | 90% | 94 |
| February 2026 | 85% | 81 |
| March 2026 | 84% | 116 |
| April 2026 | 89% | 91 |
| May 2026 | 85% | 96 |
Same trip, other airports
Keep nerding
Based on 1,154 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.