Charleston (CHS) to Seattle (SEA) flights
Alaska Airlines flies nonstop from Charleston International Airport to Seattle-Tacoma International Airport, with about 7 flights a week in July 2026. The 2,415-mile flight takes about 6h 2m gate to gate.
- Distance
- 2,415 mi · 3,887 km
- Flight time
- 6h 2m
- Airlines
- 1
- Seats filled
- 80%
Airlines flying CHS to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 7 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 48,415 | 6h 2m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
CHS to SEA flight schedule
1 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 6:01pm and the last at 6:01pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| AS 787Alaska Airlines | 6:01pm | 8:59pm | 31 | 74% |
Is CHS to SEA on time?
From September 2025 to August 2026, 73% of 347 flights arrived within 15 minutes of schedule and 0.6% were cancelled. Flights leaving around 6pm were the most punctual (74%), those around 7pm the least (70%). Most delay time was caused by late-arriving aircraft (45%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 347 | 73% | 13 min | 0.6% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 31 | 4,797 | |
| September 2025 | 30 | 3,987 | |
| October 2025 | 29 | 3,989 | |
| November 2025 | 23 | 3,278 | |
| December 2025 | 31 | 4,250 | |
| January 2026 | 24 | 2,532 | |
| February 2026 | 25 | 3,063 | |
| March 2026 | 31 | 4,352 | |
| April 2026 | 30 | 4,477 | |
| May 2026 | 30 | 4,519 | |
| June 2026 | 30 | 4,385 | |
| July 2026 | 31 | 4,786 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.