List of bus routes in Pittsburgh
The Port Authority's bus system covers Allegheny County, and its service extends into small portions of neighboring Beaver, Butler, and Westmoreland counties. These counties also have their own transit systems, including several routes that run into Downtown Pittsburgh, where riders can make connections with Port Authority service.
Route renumbering and realignments
From 1964 to 2010, the Port Authority used an alphanumeric numbering system. With the renumbering and realignments outlined in the Transit Development Plan in 2009, the present numbering system was adopted in April 2010.Light rail and busways are designated by the following colors:
- Red Line—former 42S South Hills Village via Beechview light rail route
- Blue Line—former 47S South Hills Village via Overbrook and 47L Library via Overbrook light rail routes
- Brown Line—former 52 Allentown light rail route
- Green—bus routes using the West Busway, designated with a 'G'
- Purple—bus routes using the Martin Luther King Jr. East Busway, designated with a 'P'
- Orange—bus routes using the I-279 HOV lane, designated with an 'O'
- Yellow—bus routes using the South Busway, designated with a 'Y'
Bus routes
Bus operations
- Route numbers operating seven days a week including holidays are listed in Blue. On most of the daily bus routes, they operate on a 60-minute interval after 7 pm Monday through Saturday and all day on Sunday and Holidays.
- Route numbers operating Monday through Saturday with limited or no holiday hours are listed in Red
- Route numbers operating Monday through Friday only are listed in Bold.
- All other plain routes operate Monday through Friday during peak periods only.
Local routes
Flyer routes
Eliminated services
Discontinued routes
Bus routes that are discontinued from the lineup and integrated into other one or more route throughout PAT's history include:| Route number | Route name | Replaced by |
| 1B | Saxonburg Boulevard | D Middle Road Flyer |
| 1C | Middle Road | D Middle Road Flyer |
| 1F/3 | Millvale | |
| 3L | Creighton-Lower Burrell Express | P10 Allegheny Valley Flyer |
| 3M | Tarentum-Natrona Express | P10 Allegheny Valley Flyer |
| 5A/5 | Natrona-Argonne Drive/Natrona | |
| 5C | Natrona Heights-Brackenridge | |
| 6D | Spring Looper | 7 Spring Garden |
| 11A | McKnight | 12A North Hills Shopper, 13C Perry Highway Express |
| 11B | Evergreen | |
| 11C/9 | Perry Highway | |
| 11G | Thompson Run | |
| 11F | West View | |
| 13B | Babcock Express | 12A North Hills Shopper, 13A North Hills Express, O5 Thompson Run Flyer |
| 13C | Perry Highway Express | 9 Perry Highway,13X Ross Park and Ride |
| 13D | Perrysville Express | 6B Spring Hill, 11D Perrysville, 16F City View |
| 13F | West View Express | 8 Perrysville, 13X Ross Park and Ride, 500 Highland Park-Bellevue |
| 13H | Rochester Road Express | 13J Franklin Park |
| 13J | Franklin Park Express | |
| 13S | Ross Park and Ride | |
| 13U/O4 | North Hills Express/North Hills-Oakland Flyer | |
| 14C | Bryant School Run Road Express | 13J Franklin Park |
| 15A | North Hills Shuttle | |
| 16C | Bellevue-West View | 500 Highland Park-Bellevue |
| 16U | North Shore | 501 North Shore-Downtown-Oakland |
| 18C | Bellevue-Union Avenue Express | 14 Ohio River Valley, 19L Emsworth Limited, 500 Highland Park-Bellevue |
| 18E | Manchester Express | |
| 24A | Crafton-Presston | |
| 25/25A | Moon/Robinson-Moon-Coraopolis | |
| 25C | Hankey Farms | |
| 25D | Robinson-Carnegie | |
| 26C | Ingram via Steuben Street | Replaced by 26B & 100 when West Busway opened in 2000 |
| 26D | Chartiers City | 26 Chartiers & 27 Fairywood |
| 26E | Robinson | 29 Robinson |
| 26F | Moon Run-Forest Grove via West End | 28F Forest Grove Express |
| 26U | Robinson-Oakland | 26E Robinson |
| 28A | Wings Over Pittsburgh | Special Service for Airshows |
| 28B | Berry Street Express | 26B Fairywood |
| 28E | Robinson Express | 29 Robinson |
| 28F | Forest Grove Express | |
| 28G | Oakdale Express | |
| 28J | Settlers Ridge Express | Temporary Park and Ride Route for Closure of Fort Pitt Tunnels in early 2000s |
| 28K | Moon Express | G3 Moon Flyer |
| 28M/32 | Campbells Run | |
| 28S | Moon-West Busway | |
| 29E | Millers Run | 31 Bridgeville, G31 Bridgeville Flyer |
| 31A | Carnegie-Crafton | Route became redundant with opening of West Busway |
| 33X/G1 | West Busway-All Stops/West Busway-Robinson | |
| 33F | McDonald | |
| 35A | South Park-Baldwin-Whitehall | Y47 Curry Flyer, Y49 Prospect Flyer |
| 36B | Virginia Manor | |
| 36D/37 | Westwood/Ridgemont | |
| 37A | Mt. Lebanon-McFarland | - |
| 37D | Dormont Station | Temporary route while Beechview Line was under construction |
| 41A | Pioneer Avenue | 41D Brookline, 41G Dormont |
| 41B | Bower Hill | 41 Bower Hill |
| 41C | Cedar Boulevard | 36 Banksville |
| 41F | McNeilly | 41A Pioneer/41D Brookline |
| 41G/35 | Dormont-Rolling Hills/Sunset Hills | Partially replaced by 35 Sunset Hills south of Dormont station |
| 42 | Dormont | Mount Lebanon Station, Dormont, Brookline, South Busway, Station Square, Downtown |
| 42F | Broadway | Temporary rail shuttle for Red Line |
| 42C | Castle Shannon ONLY via Beechview | Red Line |
| 42L | Library via Beechview | 47L Library via Overbrook Light Rail route |
| 44D | Jefferson | |
| 44E | Inglewood | |
| 44F | Terrace | |
| 44L | Library Short | |
| 44S | Castle Shannon-Beechview | Temporary Rail Car Shuttle |
| 44U/42 | Mt. Lebanon-Oakland | |
| 46A | Brentwood | 51 Carrick, Y45 Baldwin Manor Flyer |
| 46H | Pleasant Hills | Y1 Large Flyer, Y46 Elizabeth Flyer |
| 46S | Castle Shannon-Overbrook | Temporary route used while Overbrook Trolley Line was down, 1993 to 2006. First began as 49S Shannon-Overbrook. |
| 47D | Drake | Discontinued 09/04/99 |
| 50B | Glassport-Clairton | |
| 51B/50 | Spencer | |
| 51D | Churchview | 50 Spencer |
| 51S | South Side-Century III-Large | |
| 53F | Homestead-Lincoln Place Express | 53 Homestead Park and 53L Homestead Park Limited |
| 53H | Homeville-Duquesne | 52 Homeville and 52L Homeville Limited |
| 55B/52 | Homeville | |
| 55D | West Run-Brierly Lane | |
| 55E | Whitaker-West Mifflin | 59 Mon Valley |
| 55M/55 | Century III Mall/Jefferson | 55 Jefferson eliminated during service cuts; later restored as 55 Glassport |
| 56U | Greenfield | 58 Greenfield |
| 58C | McKeesport | P7 McKeesport Flyer |
| 58P | Port Vue-Liberty Express | P7 McKeesport Flyer |
| 58V | Versailles Express | P7 McKeesport Flyer |
| 59U | South Side Works-Oakland-Waterfront | 75 Ellsworth & 61D Murray |
| 60B | Jenny Lind | 61 White Oak |
| 60E/61 | White Oak-Grandview/White Oak | |
| 60M | McKeesport-East Pittsburgh | 62 Liberty-North Versailles |
| 60P/62 | Port Vue-Liberty/Liberty-North Versailles | |
| 60S | Crawford Village-Jenny Lind | 60 Walnut-Crawford Village |
| 61F | Homestead Park | 53 Homestead Park |
| 63A | North Braddock Express | |
| 63B | Rankin Express | P71 Swissvale Flyer |
| 65E | North Braddock-Swissvale | |
| 67C | Laketon Road | |
| 67E | Greensburg Pike | |
| 67J | Lincoln Highway | |
| 68B | Blackridge-Laketon | |
| 68S | Monroeville-East Busway | |
| 69A | Forbes | 61A East Pittsburgh-Wilkinsburg |
| 73B | Highland Park Express | 93A Aspinwall-Cheswick Express |
| 74B | Highland Park | |
| 75A/70 | Monroeville Shopper | |
| 75B/72 | Monroeville-North Versailles/Monroeville-Pitcairn | |
| 75D | Penn Hills-Monroeville | |
| 77A/78 | Oakmont | P78 Oakmont Flyer |
| 77C | Shadyside | W Wilkins Avenue Flyer |
| 77D | Highland-Friendship | 87 Friendship |
| 77U | Shadyside | |
| 78C | Shadyside Express | W Wilkins Avenue Flyer |
| 78E | Penn Hills-East Vue Express | P16 Penn Hills flyer |
| 79B | Wilkinsburg-Penn Hills | |
| 83B | Lincoln Avenue Express | LP Lincoln Park Flyer |
| 84A | Herron Hill-Oakland | 81 Oak Hill, 83 Bedford Hill |
| 84B | Oakland Loop | |
| 84C | Hill Loop | 81 Oak Hill, 83 Bedford Hill |
| 88A | East Hills Express | |
| 91S | Sharps Hill | |
| 93A | Aspinwall-Cheswick Express | P10 Allegheny Valley Flyer |
| 94A | Stanton Heights | 87 Friendship |
| 94B | Morningside | 87 Friendship |
| 94C | Paulson Avenue | 74 Homewood-Squirrel Hill |
| 98D | Strip District | |
| 98F | Grant Street-First Avenue | |
| 500 | Highland Park-Bellevue | 13 Bellevue, 71B Highland Park |
| 501 | Manchester-Wilkinsburg | 16D Manchester, 61A East Pittsburgh-Wilkinsburg |
| A | Moon Flyer | |
| AVN | Allegheny Valley North Flyer | P10 Allegheny Valley Flyer |
| BG | Bellevue-Gass Road Flyer | |
| BR | Brentwood Flyer | 51 Carrick, Y45 Baldwin Manor Flyer |
| CL | Clairton Flyer | 46G Elizabeth |
| CO | Coraopolis Flyer | 21 Coraopolis |
| CV | Churchview Flyer | 51D Churchview |
| D/P11 | Middle Rd Flyer | - |
| DB | Middle Road-Burchfield Flyer | D Middle Road Flyer |
| F | Homestead Park-Lincoln Place Flyer | 53F Homestead-Lincoln Place |
| G | Greensburg Pike Flyer | |
| GC | Garden City Flyer | P67 Monroeville Flyer |
| GR | Greensburg Pike-White Oak Flyer | G Greensburg Pike Flyer |
| H | Homeville Flyer | |
| JL | Jefferson-Large Flyer | |
| ML | Millvale-Lawrenceville Flyer | 3 Millvale |
| OV | Ohio Valley Flyer | 14 Ohio Valley |
| SW | Spencer-Willett Flyer | 51B Spencer |
| T | Trafford Flyer | 67F Trafford and 68F Trafford Express |
| U | East Vue Flyer | 78E Penn Hills-East Vue |
| UV | UltraViolet loop | |
| W''' | Wilkins Avenue Flyer |
Former special services
Port Authority operated special park and ride shuttles to Steelers' games and other stadium events from 1967-2011. Routes with an "S" were for servicing one time events.| Route number | Route name | Service area |
| 13S | Ross Park & Ride | Ross Park & Ride Lot |
| 28S | Moon-West Busway | University Blvd, Bell, Idlewood, Crafton, Columbus's Knights, Sheraden Park & Ride Lots |
| 51S | South Side-Century III | Larger and Century III P&R Lot, South Side and Station Square |
| 68S | Monroeville-E Busway | Monroeville and Wilkinsburg P&R, Homewood, E. Liberty, Shadyside, Polish Hill |
| 98D | Strip District | Strip District, Convention Center Parking Garage |
| 98F | Grant Street-First Avenue | 1st Ave and Steel Plaza Stations, Wood and Gateway Center Stations, Downtown P Garage |