Historical on-time performance
Raleigh-durham to Seattle
2,354 miData through Dec 2025Source: US DOT · BTS
Flights on RDU–SEA arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 777 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time88%Medianon timep9020 minCancel0.3%Flights307
- Alaska AirlinesOn-time70%Medianon timep9040 minCancel1.3%Flights470
Why flights run late
Delay causes
- Airline35%
- Weather6%
- Air traffic (NAS)33%
- Late aircraft26%
- Security1%
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 RDU → SEA
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 73% to 84% on time.
- Mornings84% on time · p90 20 min · 1,573 flights
- Afternoons82% on time · p90 25 min · 66 flights · limited
- Evenings73% on time · p90 35 min · 976 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 84% on time.
- Tuesdays84% on time · p90 20 min · 363 flights
- Saturdays83% on time · p90 30 min · 363 flights
- Wednesdays82% on time · p90 25 min · 368 flights
- Mondays79% on time · p90 35 min · 382 flights
- Fridays78% on time · p90 30 min · 381 flights
- Thursdays78% on time · p90 30 min · 374 flights
- Sundays77% on time · p90 30 min · 384 flights
Advertisement
Keep exploring