Best Time to Fly BWI to PHX: On-Time Stats by Hour & Airline
Baltimore/Washington International Thurgood Marshall → Phoenix Sky Harbor International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 77.2% of Baltimore (BWI) to Phoenix (PHX) flights arrived on time (1,234 scheduled flights). That is in line with the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (83% on time) and June the worst month (69%).
The cancellation rate was 0.9% (US average 1.8%).
BWI to PHX on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlines | 77.2% | 47 min | 0.9% | 1,234 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BWI to PHX
On-time arrival % by scheduled departure hour (local time), 2,531 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 90.8% | 0.4% | 556 |
| 7am–8am | 91.5% | 0.0% | 94 |
| 8am–9am | 86.7% | 0.0% | 105 |
| 9am–10am | 85.4% | 0.6% | 159 |
| 10am–11am | 85.0% | 1.1% | 176 |
| 11am–12pm | 89.8% | 3.3% | 61 |
| 12pm–1pm | 85.3% | 1.4% | 69 |
| 1pm–2pm | 81.5% | 0.0% | 81 |
| 2pm–3pm | 61.9% | 0.0% | 84 |
| 3pm–4pm | 64.4% | 0.6% | 162 |
| 4pm–5pm | 78.1% | 0.6% | 180 |
| 5pm–6pm | 70.6% | 0.7% | 138 |
| 6pm–7pm | 70.4% | 1.2% | 171 |
| 7pm–8pm | 67.2% | 0.0% | 137 |
| 8pm–9pm | 71.5% | 0.8% | 124 |
| 9pm–10pm | 60.6% | 2.9% | 204 |
| 10pm–11pm | Limited data | 30 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BWI to PHX
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 73.9% | -6.4 pts | 2.1% | 47 |
| Christmas & New Year (Dec 20 - Jan 3) | 71.0% | -9.3 pts | 0.0% | 107 |
| Summer peak (Jun 15 - Aug 15) | 70.8% | -9.5 pts | 1.6% | 384 |
| All other days | 80.3% | — | 0.7% | 1,993 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).