Flight Reliability
AS 640 · Alaska Airlines
Tampa → Seattle (TPA–SEA)99% of its flights flew this route. The rest (LAS–SEA) are included in these numbers.
- 71%
- Arrive within 15 minutes
- 9 min
- Average arrival delay
- 0.5%
- Cancelled
- 5 min
- Median arrival delay
Based on 186 historical flights. Data through May 2026.
What the data says
Thursdays have been rough.
AS 640 arrived on time 82% of the time on Tuesdays and just 52% on Thursdays. That gap is worth planning around.
A bit behind the TPA–SEA route.
AS 640 arrived on time 71% of the time, versus 76% across the TPA–SEA route.
Lagging the Alaska Airlines network.
AS 640 arrived on time 71% of the time, versus 80% across the Alaska Airlines network.
Trending in the right direction.
AS 640 arrived on time 79% of the time over the last three months in the data, compared with 60% in the three months before that.
The breakdown
- Mon62%(26 flights)
- Tue82%(28 flights)
- Wed73%(26 flights)
- Thu52%(27 flights)
- Fri68%(25 flights)
- Sat78%(23 flights)
- Sun79%(28 flights)
- 6–9 AM70%(182 flights)
- 3–6 PM—(1 flights)
Dec 59% → May 77% on time
| Month | On-time percentage | Flights |
|---|---|---|
| December 2025 | 59% | 29 |
| January 2026 | 60% | 30 |
| February 2026 | 61% | 28 |
| March 2026 | 75% | 28 |
| April 2026 | 85% | 27 |
| May 2026 | 77% | 31 |
- Departures on time
- 83%
- Diverted
- 1.1%
- Flights flown
- 183
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 186 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.