Seattle-Tacoma International ⇄ Chicago O'Hare International SEA–ORD
Airlines flew 11,262 flights between Seattle-Tacoma International SEA in Seattle, WA and Chicago O'Hare International ORD in Chicago, IL in the twelve months to July 2026, both directions together: 1,623,025 passengers in 1,901,748 seats, 85% of them filled, and 15,311,025 pounds of freight. 1,721 miles, about 203 minutes in the air, on 10 airlines: Alaska Airlines Inc. (3,519), United Air Lines Inc. (2,976), American Airlines Inc. (2,638), Delta Air Lines Inc. (1,774) and 6 more. Planning to fly it yourself? The weather and winds along this route right now.
Flights by month both directions
By month, as a table
| flights | |
|---|---|
| 1/25 | 602 |
| 2/25 | 546 |
| 3/25 | 690 |
| 4/25 | 880 |
| 5/25 | 1,096 |
| 6/25 | 1,167 |
| 7/25 | 1,269 |
| 8/25 | 1,203 |
| 9/25 | 1,045 |
| 10/25 | 1,013 |
| 11/25 | 776 |
| 12/25 | 786 |
| 1/26 | 625 |
| 2/26 | 627 |
| 3/26 | 717 |
| 4/26 | 934 |
| 5/26 | 1,142 |
| 6/26 | 1,173 |
| 7/26 | 1,221 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 76,825 |
| 2/25 | 71,109 |
| 3/25 | 93,321 |
| 4/25 | 117,639 |
| 5/25 | 158,897 |
| 6/25 | 178,450 |
| 7/25 | 200,715 |
| 8/25 | 193,747 |
| 9/25 | 157,332 |
| 10/25 | 143,010 |
| 11/25 | 101,361 |
| 12/25 | 106,767 |
| 1/26 | 80,003 |
| 2/26 | 78,893 |
| 3/26 | 100,526 |
| 4/26 | 124,152 |
| 5/26 | 162,198 |
| 6/26 | 180,920 |
| 7/26 | 194,116 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Alaska Airlines Inc. AS | 3,519 | 531,336 | 86% | scheduled passenger service |
| United Air Lines Inc. UA | 2,976 | 471,599 | 87% | scheduled passenger service |
| American Airlines Inc. AA | 2,638 | 400,653 | 85% | scheduled passenger service |
| Delta Air Lines Inc. DL | 1,774 | 219,150 | 82% | charter passenger service, scheduled passenger service |
| Korean Air Lines Co. Ltd. KE | 277 | 0 | charter cargo service, scheduled cargo service | |
| China Airlines Ltd. CI | 67 | 0 | scheduled cargo service | |
| Eva Airways Corporation BR | 6 | 0 | scheduled cargo service | |
| Kalitta Air LLC KAQ | 3 | 0 | charter cargo service | |
| Cathay Pacific Airways Ltd. CX | 1 | 287 | 86% | scheduled passenger service |
| Atlas Air Inc. 5Y | 1 | 0 | charter cargo service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing 737-800 | 3,197 | 166 | 445,389 |
| Boeing 737-900ER | 2,054 | 178 | 315,091 |
| Boeing B737 Max 900 | 1,828 | 178 | 280,090 |
| Airbus Industrie A321-200n | 1,318 | 200 | 234,158 |
| Airbus Industrie A321Neoxlr | 1,024 | 190 | 167,545 |
| Boeing B737 Max 800 | 746 | 168 | 106,013 |
| A220-300 BD-500-1A11 | 565 | 130 | 54,909 |
| Boeing B747-8 | 275 | 0 | 0 |
| Airbus Industrie A320-100/200 | 104 | 150 | 12,516 |
| Boeing B777-F | 67 | 0 | 0 |
| A200-100 BD-500-1A10 | 36 | 109 | 3,357 |
| Airbus Industrie A319 | 29 | 126 | 3,066 |
| Boeing 777-200ER/200LR/233LR | 6 | 0 | 0 |
| Boeing 747-400 | 6 | 0 | 0 |
| Boeing 737-900 | 2 | 178 | 345 |
| Boeing 737-700/700LR/Max 7 | 2 | 126 | 225 |
| Boeing 757-200 | 1 | 72 | 34 |
| Airbus 350-1000 | 1 | 334 | 287 |
| Boeing 767-400/ER | 1 | 238 | 0 |
SEA → ORD this direction alone · flown January 2025 to July 2026
5,435 flights of 5,565 scheduled, 809,821 passengers in 944,830 seats, 2,079,554 pounds of freight, 306,528 pounds of mail. Alaska Airlines Inc. 1,758; United Air Lines Inc. 1,481; American Airlines Inc. 1,312; Delta Air Lines Inc. 883; Cathay Pacific Airways Ltd. 1.
ORD → SEA this direction alone · flown January 2025 to July 2026
5,827 flights of 5,577 scheduled, 813,204 passengers in 956,918 seats, 13,231,471 pounds of freight, 757,173 pounds of mail. Alaska Airlines Inc. 1,761; United Air Lines Inc. 1,495; American Airlines Inc. 1,326; Delta Air Lines Inc. 891; Korean Air Lines Co. Ltd. 277; China Airlines Ltd. 67; Eva Airways Corporation 6; Kalitta Air LLC 3; Atlas Air Inc. 1.
Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: Seattle-Tacoma International SEA and Chicago O'Hare International ORD; all routes.