Dallas (DAL) to Seattle (SEA) flights
Southwest Airlines flies nonstop from Dallas Love Field to Seattle-Tacoma International Airport, with about 8 flights a week in July 2026. The 1,670-mile flight takes about 4h 14m gate to gate.
- Distance
- 1,670 mi · 2,688 km
- Flight time
- 4h 14m
- Airlines
- 1
- Seats filled
- 88%
Airlines flying DAL to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 8 | Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 7 | 32,706 | 4h 14m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
DAL to SEA flight schedule
2 flight numbers flew this route in August 2026. The first usually leaves at 7:55am and the last at 9:00am. 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) |
|---|---|---|---|---|
| WN 963Southwest Airlines | 7:55am | 10:05am | 12 | 92% |
| WN 519Southwest Airlines | 9:00am | 11:15am | 16 | 88% |
Is DAL to SEA on time?
From September 2025 to August 2026, 75% of 219 flights arrived within 15 minutes of schedule and 0% were cancelled. Flights leaving around 9am were the most punctual (89%), those around 11am the least (67%). Most delay time was caused by late-arriving aircraft (40%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 219 | 75% | 13 min | 0% |
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
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 7am to 8am | 69 | 83% | |
| 8am to 9am | 84 | 73% | |
| 9am to 10am | 27 | 89% | |
| 11am to 12pm | 27 | 67% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 32 | 4,887 | |
| September 2025 | 30 | 4,339 | |
| October 2025 | 1 | 135 | |
| March 2026 | 27 | 3,967 | |
| April 2026 | 30 | 4,140 | |
| May 2026 | 31 | 4,913 | |
| June 2026 | 34 | 4,997 | |
| July 2026 | 34 | 5,328 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.