Atlanta (ATL) to Seattle (SEA) flights
Delta Air Lines, Alaska Airlines fly nonstop from Hartsfield Jackson Atlanta International Airport to Seattle-Tacoma International Airport, with about 78 flights a week in July 2026. The 2,182-mile flight takes about 5h 25m gate to gate.
- Distance
- 2,182 mi · 3,512 km
- Flight time
- 5h 25m
- Airlines
- 2
- Seats filled
- 89%
Airlines flying ATL to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Delta Air Lines | 59 | Boeing 737-900ER, Boeing 757-300, Boeing 757-200 | 414,992 | 5h 24m |
| Alaska Airlines | 19 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 132,983 | 5h 28m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
ATL to SEA flight schedule
11 flight numbers flew this route in August 2026, 11 of them almost daily. The first usually leaves at 7:03am and the last at 9:35pm. 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 377Alaska Airlines | 7:03am | 9:25am | 23 | 85% |
| DL 444Delta Air Lines | 7:35am | 9:49am | 31 | 78% |
| AS 348Alaska Airlines | 8:54am | 11:20am | 31 | 72% |
| DL 774Delta Air Lines | 9:45am | 12:08pm | 31 | 85% |
| DL 648Delta Air Lines | 11:15am | 1:40pm | 31 | 81% |
| DL 629Delta Air Lines | 12:29pm | 2:45pm | 31 | 80% |
| DL 481Delta Air Lines | 1:45pm | 4:00pm | 31 | 78% |
| AS 218Alaska Airlines | 4:18pm | 6:46pm | 31 | 64% |
| DL 472Delta Air Lines | 4:45pm | 7:05pm | 31 | 70% |
| DL 714Delta Air Lines | 6:00pm | 8:23pm | 30 | 65% |
| DL 903Delta Air Lines | 9:35pm | 11:57pm | 31 | 78% |
Is ATL to SEA on time?
From September 2025 to August 2026, 77% of 3,297 flights arrived within 15 minutes of schedule and 0.7% were cancelled. Flights leaving around 9am were the most punctual (82%), those around 7pm the least (64%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (51%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Delta Air Lines | 2,404 | 77% | 15 min | 0.6% |
| Alaska Airlines | 893 | 76% | 14 min | 1% |
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 | 655 | 81% | |
| 8am to 9am | 77 | 83% | |
| 9am to 10am | 526 | 82% | |
| 11am to 12pm | 264 | 81% | |
| 12pm to 1pm | 187 | 79% | |
| 1pm to 2pm | 134 | 85% | |
| 2pm to 3pm | 94 | 75% | |
| 3pm to 4pm | 72 | 81% | |
| 4pm to 5pm | 385 | 70% | |
| 6pm to 7pm | 175 | 68% | |
| 7pm to 8pm | 299 | 64% | |
| 8pm to 9pm | 67 | 67% | |
| 9pm to 10pm | 285 | 78% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 314 | 56,471 | |
| September 2025 | 283 | 48,633 | |
| October 2025 | 291 | 45,545 | |
| November 2025 | 256 | 38,685 | |
| December 2025 | 265 | 43,813 | |
| January 2026 | 213 | 34,234 | |
| February 2026 | 192 | 31,483 | |
| March 2026 | 227 | 36,571 | |
| April 2026 | 252 | 40,064 | |
| May 2026 | 297 | 52,700 | |
| June 2026 | 324 | 57,766 | |
| July 2026 | 347 | 62,010 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.