Charleston (CHS) to Seattle (SEA): On-Time Performance
Data through July 2026
Charleston (CHS) to Seattle (SEA) is a thinner route than most in this dataset — 347 departures over the past year, roughly 7 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 73% arrived on time.
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 1.0%
- Flights/day
- 0.95
- last 12 months
- Duration
- 6h 2m
- scheduled
- Distance
- 2,415 mi
Monthly on-time trend
Best time to fly from CHS to SEA
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 68% | 13 min |
| Tuesday | 75% | 10 min |
| Wednesday | 75% | 12 min |
| Thursday | 73% | 12 min |
| Friday | 70% | 17 min |
| Saturdaybest | 83% | 7 min |
| Sunday | 70% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft46%
- Airline operations14%
- National airspace system35%
- Weather5%
- Security1%
Frequently asked questions
- How often are flights from CHS to SEA delayed?
- 27% of CHS–SEA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 12 minutes.
- How long is the flight from CHS to SEA?
- The scheduled CHS–SEA flight time averages 6h 2m over 2,415 miles. Actual arrival times vary — flights on this route land 15+ minutes late 27% of the time.
- How often are CHS to SEA flights cancelled?
- 1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from CHS to SEA?
- July 2025 was the roughest month in this dataset, with only 47% of arrivals on time. The best was January 2025 at 96%. If your dates are flexible, that 49-point gap is worth planning around.
Explore related pages
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Related guides
Based on 727 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.