Historical on-time performance
Seattle to Raleigh-durham
Flights on SEA–RDU arrive on time 76% of the time over the last 12 months.
based on 834 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-time77%Medianon timep9030 minCancel0.9%Flights527
- Delta Air LinesOn-time76%Medianon timep9030 minCancel1.3%Flights307
Why flights run late
Delay causes
- Airline43%
- Weather1%
- Air traffic (NAS)28%
- Late aircraft28%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline33%
- Weather67%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 9 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SEA → RDU
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 74% to 81% on time.
- Mornings81% on time · p90 25 min · 916 flights
- Afternoons81% on time · p90 30 min · 900 flights
- Middays80% on time · p90 20 min · 177 flights · limited
- Overnights74% on time · p90 30 min · 688 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 86% on time.
- Tuesdays86% on time · p90 20 min · 369 flights
- Wednesdays85% on time · p90 25 min · 373 flights
- Saturdays80% on time · p90 20 min · 376 flights
- Thursdays78% on time · p90 30 min · 388 flights
- Fridays77% on time · p90 30 min · 392 flights
- Sundays76% on time · p90 30 min · 394 flights
- Mondays75% on time · p90 35 min · 389 flights
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