| VA | From | Airport | To | Destination | Type | Distance miles | Frequency | Competitors | |
|---|---|---|---|---|---|---|---|---|---|
| FAA | KKLS | Kelso-Longview | WA09 | Roche Harbor | Local | 150.0 | 0 | ||
| FAA | KKLS | Kelso-Longview | KBFI | Seattle - Boeing Field/King Co Intl | Local | 88.2 | 1 | ||
| FAA | KKLS | Kelso-Longview | KPAE | Everett - Snohomish Co | Local | 110.2 | 0 | ||
| FAA | KKLS | Kelso-Longview | KHIO | Portland-Hillsboro | Local | 34.7 | 1 | ||
| FAA | KKLS | Kelso-Longview | KALW | Walla Walla Regl | Local | 191.8 | 0 | ||
| FAA | KKLS | Kelso-Longview | KORS | Eastsound - Orcas I | Local | 155.4 | 1 | ||
| SCA | KKLS | Kelso-Longview | KTDO | Toledo-Winlock Carlson Meml | Local | 21.9 | 0 | ||
| SKA | KKLS | Kelso-Longview | KHIO | Portland-Hillsboro | Local | 34.7 | 0 | ||
| SKA | KKLS | Kelso-Longview | KTDO | Toledo-Winlock Carlson Meml | Local | 21.9 | 1 |