| 101 | Fort Hunt | Local |
| 109 | Rose Hill | Local |
| 151 | Engleside – Mount Vernon | Local |
| 152 | Groveton – Mount Vernon | Local |
| 159 | Engleside – Mount Vernon (Limited-Stop) | Local |
| 161 | Hybla Valley Counter-Clockwise | Local |
| 162 | Hybla Valley Clockwise | Local |
| 171 | Richmond Highway | Cross-County |
| 231 | Kingstowne Counter-Clockwise | Local |
| 232 | Kingstowne Clockwise | Local |
| 301 | Telegraph Road | Local |
| 305 | Newington Forest – Silverbrook Road | Local |
| 306 | GMU – Pentagon | Cross-County |
| 308 | Franconia-Springfield – Inova Mt Vernon Hospital | Local |
| 310 | Franconia Road – Rolling Valley | Cross-County |
| 321 | Springfield Counter-Clockwise | Local |
| 322 | Springfield Clockwise | Local |
| 334 | Newington Circulator | Local |
| 335 | Fort Belvoir – The Eagle | Local |
| 340 | Patriot Ridge – Saratoga | Local |
| 341 | Boston Boulevard – Saratoga | Local |
| 350 | Springfield Business Circulator | Local |
| 351 | Springfield Business Circulator (Weekday Rush Hour) | Local |
| 352 | TAGS Springfield Business Circulator | Local |
| 353 | TAGS Springfield Business Circulator | Local |
| 371 | Lorton – Franconia-Springfield Metro | Local |
| 393 | Saratoga – Pentagon – Mark Center | Express |
| 394 | Saratoga – Pentagon Express | Express |
| 395 | Gambrill – Pentagon Express | Express |
| 396 | Backlick – Pentagon Express | Express |
| 401 | Backlick – Gallows Northbound | Cross-County |
| 402 | Backlick – Gallows Southbound | Cross-County |
| 423 | Park Run – Westpark | Local |
| 427 | Spring Hill Metro – Farm Credit Admin | Local |
| 432 | Old Courthouse – Beulah | Local |
| 461 | Flint Hill – Tapawingo – Vienna | Local |
| 462 | Dunn Loring – Navy Federal – Tysons | Local |
| 463 | Maple Avenue – Vienna | Local |
| 467 | Dunn Loring – Tysons | Local |
| 480 | Wolf Trap Express (Seasonal) | Seasonal |
| 494 | Springfield – Tysons | Cross-County |
| 495 | Burke Centre VRE – Tysons | Cross-County |
| 507 | Sunset Hills – Sunrise Valley | Local |
| 552 | Innovation Center – Wiehle-Reston East | Local |
| 553 | Kingstream – Herndon – Fox Mill | Local |
| 557 | Reston South – Soapstone | Local |
| 558 | Center Harbor – Wiehle | Local |
| 559 | Reston Town Center – Wiehle | Local |
| 574 | Reston – Tysons | Cross-County |
| 598 | Reston South – Pentagon – Crystal City | Express |
| 605 | Reston – Fair Oaks | Cross-County |
| 610 | George Mason University – Centreville | Cross-County |
| 615 | Fair Oaks – Greenbriar | Local |
| 622 | Penderbrook – Monument Drive | Local |
| 625 | Random Hills – Pender Drive | Local |
| 630 | Centreville – Monument Garage | Local |
| 642 | Stone Road – Centreville North | Local |
| 651 | Chantilly – Monument Drive | Local |
| 652 | Chantilly – Franklin Farm | Local |
| 660 | Stone Road – Tysons | Cross-County |
| 662 | Stone Road – Tysons Corner | Cross-County |
| 663 | Stringfellow Road – Vienna | Local |
| 670 | Chantilly – Franconia-Springfield | Cross-County |
| 671 | Chantilly – Inova Fairfax – Dunn Loring (Limited-Stop) | Cross-County |
| 672 | Chantilly – Dunn Loring (Limited-Stop) | Cross-County |
| 697 | Stringfellow Road – D Street SW, Washington D.C. | Express |
| 698 | Stringfellow Road – Vienna – Pentagon | Express |
| 699 | Monument Drive Transit Center – Downtown D.C. | Express |
| 703 | Pimmit Hills | Local |
| 715 | East Falls Church – Langley | Local |
| 721 | Chain Bridge Road – McLean – Langley | Local |
| 798 | Tysons – Bethesda | Express |
| 803 | Annandale Road | Local |
| 834 | Little River Turnpike – Pentagon | Cross-County |
| 835 | Braeburn Drive – Pentagon Express | Express |
| 901 | Herndon Metro – Centreville | Cross-County |
| 921 | Herndon Circulator | Local |
| 924 | NOVA-Loudoun – Herndon – Franklin Farm | Cross-County |
| 937 | Coppermine – Elden – Herndon Metro | Local |
| 950 | Reston Town Center – Herndon Metro | Local |
| 951 | Wiehle-Reston East – Innovation Center | Local |
| 952 | Sunset Hills – Dulles Airport | Airport |
| 954 | Sterling Plaza – Herndon Metro | Local |
| 983 | Dulles Airport – Udvar-Hazy Center | Airport |
| RIBS 1 | Lake Anne – Hunters Woods | RIBS |
| RIBS 2 | Reston – South Lakes Drive – Herndon Metro | RIBS |
| RIBS 3 | Lake Anne – Hunters Woods | RIBS |
| RIBS 4 | Reston Town Center – North Point | RIBS |
| RIBS 5 | Herndon – Reston Town Center | RIBS |