Flight Reliability
AS 420 · Alaska Airlines
Seattle → Orlando (SEA–MCO)
85
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 1 min early
- Average arrival delay
- 0.6%
- Cancelled
- 7 min early
- Median arrival delay
Based on 361 historical flights. Data through May 2026.
What the data says
Morning-you made the right choice.
AS 420 departing between 6–9 AM arrived on time 87% of the time, versus 69% between 3–6 PM.
Skip Saturday if you can.
AS 420 arrived on time 89% of the time on Thursdays. On Saturdays: 75%.
Slipping a little lately.
AS 420 arrived on time 83% of the time over the last three months in the data, compared with 87% in the three months before that.
The breakdown
- Mon80%(51 flights)
- Tue80%(51 flights)
- Wed76%(50 flights)
- Thu89%(52 flights)
- Fri80%(51 flights)
- Sat75%(51 flights)
- Sun87%(52 flights)
- 6–9 AM87%(208 flights)
- 9 AM–12 PM79%(53 flights)
- 3–6 PM69%(97 flights)
90%
May
Jun 69% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 69% | 29 |
| July 2025 | 55% | 29 |
| August 2025 | 73% | 30 |
| September 2025 | 90% | 30 |
| October 2025 | 84% | 31 |
| November 2025 | 90% | 30 |
| December 2025 | 84% | 31 |
| January 2026 | 81% | 31 |
| February 2026 | 96% | 28 |
| March 2026 | 70% | 30 |
| April 2026 | 90% | 30 |
| May 2026 | 90% | 29 |
- Departures on time
- 82%
- Diverted
- 0.3%
- Flights flown
- 358
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 361 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.