Flight Reliability
AS 18 · Alaska Airlines
Portland → New York (PDX–JFK)
83
Pretty Reliable
WanderNerd Reliability Score
- 86%
- Arrive within 15 minutes
- 3 min early
- Average arrival delay
- 1.9%
- Cancelled
- 6 min early
- Median arrival delay
Based on 364 historical flights. Data through May 2026.
What the data says
The 9 AM–12 PM departure wins.
AS 18 departing between 9 AM–12 PM arrived on time 94% of the time, versus 85% between 6–9 AM.
Tuesday comes out ahead.
A small edge: 88% on time on Tuesdays against 82% on Thursdays.
A bit ahead of the Alaska Airlines network.
AS 18 arrived on time 86% of the time, versus 80% across the Alaska Airlines network.
Ticking up lately.
AS 18 arrived on time 93% of the time over the last three months in the data, compared with 88% in the three months before that.
The breakdown
- Mon86%(51 flights)
- Tue88%(51 flights)
- Wed86%(50 flights)
- Thu82%(49 flights)
- Fri84%(51 flights)
- Sat88%(51 flights)
- Sun86%(51 flights)
- 6–9 AM85%(336 flights)
- 9 AM–12 PM94%(18 flights)
97%
May
Jun 93% → May 97% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 93% | 30 |
| July 2025 | 82% | 27 |
| August 2025 | 77% | 31 |
| September 2025 | 62% | 29 |
| October 2025 | 80% | 30 |
| November 2025 | 90% | 29 |
| December 2025 | 94% | 31 |
| January 2026 | 83% | 30 |
| February 2026 | 89% | 26 |
| March 2026 | 94% | 31 |
| April 2026 | 90% | 30 |
| May 2026 | 97% | 30 |
- Departures on time
- 95%
- Diverted
- 0.8%
- Flights flown
- 354
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 364 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.