| VA | From | Airport | To | Destination | Type | Distance miles | Frequency | Competitors | |
|---|---|---|---|---|---|---|---|---|---|
| FAA | KHIO | Portland-Hillsboro | KPAE | Everett - Snohomish Co | Local | 144.6 | 1 | ||
| FAA | KHIO | Portland-Hillsboro | KKLS | Kelso-Longview | Local | 34.7 | 0 | ||
| FAA | KHIO | Portland-Hillsboro | KMWH | Moses Lake - Grant Co Intl | Local | 180.5 | 1 | ||
| FAA | KHIO | Portland-Hillsboro | KBFI | Seattle - Boeing Field/King Co Intl | Local | 122.3 | 0 | ||
| SCA | KHIO | Portland-Hillsboro | KOLM | Olympia | Local | 85.8 | 0 | ||
| SCA | KHIO | Portland-Hillsboro | OR96 | Medford - Beagle Sky Ranch | Local | 180.1 | 1 | ||
| SCA | KHIO | Portland-Hillsboro | KSEA | Seattle-Tacoma Intl | Local | 117.5 | 0 | ||
| SCA | KHIO | Portland-Hillsboro | KYKM | Yakima Air Term/McAllister | Local | 117.6 | 0 | ||
| SKA | KHIO | Portland-Hillsboro | KAST | Astoria Regl | Local | 53.7 | 0 | ||
| SKA | KHIO | Portland-Hillsboro | KKLS | Kelso-Longview | Local | 34.7 | 1 |