Seattle-Tacoma International ⇄ Chicago Midway International SEA–MDW
Airlines flew 1,347 flights between Seattle-Tacoma International SEA in Seattle, WA and Chicago Midway International MDW in Chicago, IL in the twelve months to July 2026, both directions together: 192,436 passengers in 226,192 seats, 85% of them filled, and 854,739 pounds of freight. 1,733 miles, about 208 minutes in the air, on 2 airlines: Southwest Airlines Co. (1,346), Delta Air Lines Inc. (1). 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 | 62 |
| 2/25 | 56 |
| 3/25 | 62 |
| 4/25 | 61 |
| 5/25 | 62 |
| 6/25 | 159 |
| 7/25 | 173 |
| 8/25 | 176 |
| 9/25 | 173 |
| 10/25 | 66 |
| 11/25 | 58 |
| 12/25 | 61 |
| 1/26 | 62 |
| 2/26 | 56 |
| 3/26 | 113 |
| 4/26 | 120 |
| 5/26 | 124 |
| 6/26 | 164 |
| 7/26 | 174 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 8,218 |
| 2/25 | 7,165 |
| 3/25 | 9,045 |
| 4/25 | 8,831 |
| 5/25 | 9,228 |
| 6/25 | 22,470 |
| 7/25 | 26,053 |
| 8/25 | 27,681 |
| 9/25 | 24,104 |
| 10/25 | 9,014 |
| 11/25 | 7,820 |
| 12/25 | 8,607 |
| 1/26 | 7,752 |
| 2/26 | 7,069 |
| 3/26 | 14,913 |
| 4/26 | 15,956 |
| 5/26 | 17,547 |
| 6/26 | 24,761 |
| 7/26 | 27,212 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Southwest Airlines Co. WN | 1,346 | 192,399 | 85% | scheduled passenger service |
| Delta Air Lines Inc. DL | 1 | 37 | 51% | charter passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing B737 Max 800 | 684 | 175 | 100,906 |
| Boeing 737-800 | 390 | 175 | 57,494 |
| Boeing 737-700/700LR/Max 7 | 272 | 140 | 33,999 |
| Boeing 757-200 | 1 | 72 | 37 |
SEA → MDW this direction alone · flown January 2025 to July 2026
673 flights of 678 scheduled, 96,623 passengers in 115,608 seats, 526,057 pounds of freight. Southwest Airlines Co. 672; Delta Air Lines Inc. 1.
MDW → SEA this direction alone · flown January 2025 to July 2026
674 flights of 678 scheduled, 95,813 passengers in 110,584 seats, 328,682 pounds of freight. Southwest Airlines Co. 674.
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 Midway International MDW; all routes.