Chicago (ORD) to Seattle (SEA) flights
Alaska Airlines, United Airlines, American Airlines, Delta Air Lines fly nonstop from Chicago O'Hare International Airport to Seattle-Tacoma International Airport, with about 136 flights a week in July 2026. The 1,721-mile flight takes about 4h 38m gate to gate.
- Distance
- 1,721 mi ยท 2,770 km
- Flight time
- 4h 38m
- Airlines
- 4
- Seats filled
- 85%
Airlines flying ORD to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 46 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 264,358 | 4h 39m |
| United Airlines | 35 | Airbus A321, Boeing 737 MAX 8, Boeing 737 MAX 9 | 238,461 | 4h 38m |
| American Airlines | 35 | Boeing 737-800, Airbus A321, Boeing 737 MAX 8 | 200,197 | 4h 35m |
| Delta Air Lines | 21 | Boeing 737-800, Airbus A220-300, Boeing 737-900ER | 110,188 | 4h 39m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
ORD to SEA flight schedule
27 flight numbers flew this route in August 2026, 18 of them almost daily. The first usually leaves at 6:00am and the last at 10:15pm. 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 715Alaska Airlines | 6:00am | 8:38am | 18 | 82% |
| AA 2523American Airlines | 6:40am | 9:27am | 4 | 84% |
| AA 3234American Airlines | 6:45am | 9:29am | 27 | 97% |
| DL 2041Delta Air Lines | 7:00am | 9:37am | 31 | 73% |
| UA 341United Airlines | 7:00am | 9:35am | 31 | 86% |
| AS 587Alaska Airlines | 8:02am | 10:37am | 31 | 66% |
| UA 2099United Airlines | 8:50am | 11:32am | 31 | 83% |
| AS 583Alaska Airlines | 9:00am | 11:39am | 23 | 40% |
| AA 2852American Airlines | 9:45am | 12:34pm | 27 | 67% |
| AA 2520American Airlines | 10:30am | 1:19pm | 4 | 70% |
| AA 2524American Airlines | 11:40am | 2:27pm | 4 | 57% |
| AA 1476American Airlines | 12:00pm | 2:45pm | 27 | 58% |
| DL 1564Delta Air Lines | 12:54pm | 3:40pm | 31 | 65% |
| AS 579Alaska Airlines | 1:01pm | 3:42pm | 31 | 76% |
| UA 1660United Airlines | 1:30pm | 4:09pm | 10 | 84% |
| UA 2483United Airlines | 1:30pm | 4:07pm | 21 | 48% |
| AS 407Alaska Airlines | 3:43pm | 6:22pm | 31 | 63% |
| UA 1049United Airlines | 4:20pm | 7:07pm | 21 | 52% |
| UA 1801United Airlines | 4:20pm | 7:06pm | 10 | 71% |
| AS 337Alaska Airlines | 5:42pm | 8:21pm | 28 | 49% |
| DL 373Delta Air Lines | 5:56pm | 8:35pm | 29 | 32% |
| AA 3105American Airlines | 6:01pm | 8:52pm | 31 | 45% |
| UA 2211United Airlines | 7:59pm | 10:43pm | 21 | 58% |
| UA 2820United Airlines | 8:05pm | 10:56pm | 10 | 43% |
| AS 329Alaska Airlines | 8:20pm | 11:04pm | 17 | 63% |
| AA 2392American Airlines | 9:11pm | 11:59pm | 27 | 59% |
| AA 1459American Airlines | 10:15pm | 12:52am | 4 | 47% |
Is ORD to SEA on time?
From September 2025 to August 2026, 68% of 5,542 flights arrived within 15 minutes of schedule and 1.4% were cancelled. Flights leaving around 6am were the most punctual (82%), those around 8pm the least (50%). Most delay time was caused by late-arriving aircraft (42%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 1,778 | 65% | 25 min | 1.8% |
| United Airlines | 1,489 | 74% | 17 min | 0.6% |
| American Airlines | 1,353 | 64% | 26 min | 1.6% |
| Delta Air Lines | 922 | 66% | 24 min | 1.4% |
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 |
|---|---|---|---|
| 6am to 7am | 481 | 82% | |
| 7am to 8am | 642 | 79% | |
| 8am to 9am | 528 | 74% | |
| 9am to 10am | 215 | 72% | |
| 10am to 11am | 290 | 64% | |
| 11am to 12pm | 231 | 71% | |
| 12pm to 1pm | 160 | 70% | |
| 1pm to 2pm | 429 | 79% | |
| 2pm to 3pm | 209 | 61% | |
| 3pm to 4pm | 377 | 64% | |
| 4pm to 5pm | 295 | 71% | |
| 5pm to 6pm | 406 | 53% | |
| 6pm to 7pm | 334 | 57% | |
| 7pm to 8pm | 333 | 58% | |
| 8pm to 9pm | 358 | 50% | |
| 9pm to 10pm | 148 | 57% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 591 | 96,421 | |
| September 2025 | 506 | 75,871 | |
| October 2025 | 491 | 69,860 | |
| November 2025 | 373 | 49,736 | |
| December 2025 | 377 | 54,396 | |
| January 2026 | 296 | 40,521 | |
| February 2026 | 300 | 40,270 | |
| March 2026 | 346 | 50,334 | |
| April 2026 | 458 | 59,936 | |
| May 2026 | 562 | 85,722 | |
| June 2026 | 571 | 91,024 | |
| July 2026 | 601 | 99,113 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.