Flight Reliability
DL 448 · Delta Air Lines
Seattle → Orlando (SEA–MCO)
89
Pretty Reliable
WanderNerd Reliability Score
- 84%
- Arrive within 15 minutes
- 0 min
- Average arrival delay
- 0.8%
- Cancelled
- 3 min early
- Median arrival delay
Based on 354 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
DL 448 arrived on time 89% of the time on Mondays. On Fridays: 80%.
A bit ahead of the SEA–MCO route.
DL 448 arrived on time 84% of the time, versus 81% across the SEA–MCO route.
Recent months have been rougher.
DL 448 arrived on time 86% of the time over the last three months in the data, compared with 94% in the three months before that.
The breakdown
- Mon89%(52 flights)
- Tue88%(50 flights)
- Wed81%(48 flights)
- Thu81%(48 flights)
- Fri80%(50 flights)
- Sat89%(52 flights)
- Sun80%(51 flights)
90%
May
Jun 83% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 83% | 29 |
| July 2025 | 68% | 31 |
| August 2025 | 77% | 31 |
| September 2025 | 80% | 30 |
| October 2025 | 80% | 30 |
| November 2025 | 86% | 28 |
| December 2025 | 89% | 27 |
| January 2026 | 96% | 26 |
| February 2026 | 96% | 28 |
| March 2026 | 83% | 30 |
| April 2026 | 83% | 30 |
| May 2026 | 90% | 31 |
- Departures on time
- 80%
- Diverted
- 0%
- Flights flown
- 351
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 354 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.