Historical on-time performance
Seattle to Tampa
2,520 miData through Dec 2025Source: US DOT · BTS
Flights on SEA–TPA arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 956 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Alaska AirlinesOn-time72%Medianon timep9035 minCancel0.5%Flights650
- Delta Air LinesOn-time71%Medianon timep9040 minCancel0.3%Flights306
Why flights run late
Delay causes
- Airline41%
- Weather1%
- Air traffic (NAS)29%
- Late aircraft29%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SEA → TPA
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Afternoons are the most reliable time of day to fly this route — 86% on time.
- Afternoons86% on time · p90 25 min · 76 flights · limited
- Overnights74% on time · p90 35 min · 937 flights
- Mornings74% on time · p90 35 min · 1,384 flights
- Middays73% on time · p90 35 min · 708 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 77% on time.
- Tuesdays77% on time · p90 30 min · 420 flights
- Mondays76% on time · p90 35 min · 455 flights
- Saturdays75% on time · p90 35 min · 436 flights
- Wednesdays74% on time · p90 35 min · 439 flights
- Fridays73% on time · p90 35 min · 452 flights
- Thursdays72% on time · p90 35 min · 448 flights
- Sundays71% on time · p90 45 min · 455 flights
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