| LAX–SEA | Los Angeles – Seattle | 1,252 |
| JFK–SFO | New York – San Francisco | 1,110 |
| ANC–SEA | Anchorage – Seattle | 1,034 |
| SAN–SFO | San Diego – San Francisco | 934 |
| PHX–SEA | Phoenix – Seattle | 925 |
| HNL–OGG | Honolulu, Oahu – Kahului | 911 |
| GEG–SEA | Spokane – Seattle | 857 |
| ORD–SEA | Chicago – Seattle | 847 |
| HNL–LAX | Honolulu, Oahu – Los Angeles | 822 |
| HNL–KOA | Honolulu, Oahu – Kailua-Kona | 792 |
| SFO–SNA | San Francisco – Santa Ana | 777 |
| DEN–SEA | Denver – Seattle | 776 |
| SEA–SFO | Seattle – San Francisco | 769 |
| LAS–SAN | Las Vegas – San Diego | 748 |
| BOI–SEA | Boise – Seattle | 721 |
| DEN–SAN | Denver – San Diego | 706 |
| HNL–LIH | Honolulu, Oahu – Lihue, Kauai | 698 |
| SAN–SJC | San Diego – San Jose | 694 |
| EWR–LAX | Newark – Los Angeles | 676 |
| SAN–SMF | San Diego – Sacramento | 675 |
| LAS–SEA | Las Vegas – Seattle | 669 |
| DFW–SEA | Dallas-Fort Worth – Seattle | 652 |
| LAS–SFO | Las Vegas – San Francisco | 640 |
| PHX–SAN | Phoenix – San Diego | 633 |
| PDX–SEA | Portland – Seattle | 630 |
| MCI–ORD | Kansas City – Chicago | 625 |
| HNL–ITO | Honolulu, Oahu – Hilo | 611 |
| SAN–SEA | San Diego – Seattle | 602 |
| SEA–SJC | Seattle – San Jose | 595 |
| SEA–SMF | Seattle – Sacramento | 578 |
| OAK–SAN | Oakland – San Diego | 567 |
| ORD–SAN | Chicago – San Diego | 559 |
| ATL–SEA | Atlanta – Seattle | 552 |
| SEA–SLC | Seattle – Salt Lake City | 546 |
| DFW–SAN | Dallas-Fort Worth – San Diego | 543 |
| SEA–SNA | Seattle – Santa Ana | 538 |
| SEA–YVR | Seattle – Vancouver | 530 |
| JFK–SEA | New York – Seattle | 501 |
| DEN–PDX | Denver – Portland | 497 |
| LAX–PDX | Los Angeles – Portland | 489 |
| PDX–SFO | Portland – San Francisco | 479 |
| BOS–SEA | Boston – Seattle | 474 |
| PDX–PHX | Portland – Phoenix | 458 |
| GDL–LAX | Guadalajara – Los Angeles | 422 |
| PSP–SFO | Palm Springs – San Francisco | 418 |
| ORD–PDX | Chicago – Portland | 415 |
| MSP–SEA | Minneapolis – Seattle | 408 |
| SAN–SLC | San Diego – Salt Lake City | 405 |
| HNL–SEA | Honolulu, Oahu – Seattle | 394 |
| PDX–SAN | Portland – San Diego | 368 |
| PDX–SJC | Portland – San Jose | 367 |
| EUG–SEA | Eugene – Seattle | 365 |
| ONT–SEA | Ontario – Seattle | 363 |
| LAS–PDX | Las Vegas – Portland | 359 |
| DTW–SEA | Detroit – Seattle | 349 |
| AUS–SAN | Austin – San Diego | 349 |
| EWR–SEA | Newark – Seattle | 338 |
| JFK–SAN | New York – San Diego | 336 |
| DFW–OKC | Dallas-Fort Worth – Oklahoma City | 334 |
| DFW–PDX | Dallas-Fort Worth – Portland | 334 |
| AUS–SEA | Austin – Seattle | 332 |
| RDM–SEA | Redmond – Seattle | 332 |
| PSC–SEA | Pasco – Seattle | 316 |
| PDX–SLC | Portland – Salt Lake City | 316 |
| MFR–SEA | Medford – Seattle | 314 |
| ANC–FAI | Anchorage – Fairbanks | 312 |
| FAI–SEA | Fairbanks – Seattle | 304 |
| PDX–SMF | Portland – Sacramento | 303 |
| HND–HNL | Tokyo – Honolulu, Oahu | 297 |
| LHR–SEA | London – Seattle | 294 |
| PHL–SEA | Philadelphia – Seattle | 293 |
| IAD–SEA | Dulles – Seattle | 292 |
| BOI–PHX | Boise – Phoenix | 290 |
| BOS–SAN | Boston – San Diego | 286 |
| MSP–PDX | Minneapolis – Portland | 284 |
| BOI–SFO | Boise – San Francisco | 278 |
| HNL–ONT | Honolulu, Oahu – Ontario | 276 |
| SEA–YYC | Seattle – Calgary | 274 |
| HNL–SFO | Honolulu, Oahu – San Francisco | 273 |
| DAL–PHX | Dallas – Phoenix | 268 |
| OAK–PDX | Oakland – Portland | 268 |
| MFR–PDX | Medford – Portland | 266 |
| PHX–SJC | Phoenix – San Jose | 265 |
| ELP–PHX | El Paso – Phoenix | 263 |
| ICN–SEA | Seoul – Seattle | 261 |
| OAK–SEA | Oakland – Seattle | 260 |
| EWR–SAN | Newark – San Diego | 258 |
| HNL–LAS | Honolulu, Oahu – Las Vegas | 257 |
| RNO–SAN | Reno – San Diego | 253 |
| BZN–SEA | Bozeman – Seattle | 251 |
| HNL–SAN | Honolulu, Oahu – San Diego | 247 |
| IAH–SEA | Houston – Seattle | 245 |
| OGG–SEA | Kahului – Seattle | 245 |
| BOI–LAX | Boise – Los Angeles | 242 |
| FAT–SAN | Fresno – San Diego | 242 |
| BOI–GEG | Boise – Spokane | 242 |
| MCO–SEA | Orlando – Seattle | 241 |
| FAT–SFO | Fresno – San Francisco | 241 |
| JNU–SEA | Juneau – Seattle | 240 |
| GEG–PDX | Spokane – Portland | 239 |
| SAN–STS | San Diego – Santa Rosa | 239 |
| LAX–SAN | Los Angeles – San Diego | 238 |
| BOI–PDX | Boise – Portland | 233 |
| GEG–LAX | Spokane – Los Angeles | 233 |
| ANC–PDX | Anchorage – Portland | 230 |
| ATL–PDX | Atlanta – Portland | 226 |
| CVG–IAH | Cincinnati / Covington – Houston | 225 |
| BNA–SEA | Nashville – Seattle | 224 |
| PDX–SNA | Portland – Santa Ana | 217 |
| BOI–SAN | Boise – San Diego | 216 |
| GUA–LAX | Guatemala City – Los Angeles | 214 |
| SEA–TUS | Seattle – Tucson | 214 |
| RNO–SEA | Reno – Seattle | 212 |
| ADQ–ANC | Kodiak – Anchorage | 207 |
| JFK–PDX | New York – Portland | 204 |
| KOA–LAX | Kailua-Kona – Los Angeles | 204 |
| LAX–OGG | Los Angeles – Kahului | 198 |
| IAD–SAN | Dulles – San Diego | 197 |
| OGG–SFO | Kahului – San Francisco | 196 |
| GEG–SFO | Spokane – San Francisco | 196 |