The last Route 992 riders of the night will soon get the same scheduled frequency as daytime airport travelers. Beginning Sunday, September 6, Metropolitan Transit System buses will run every 15 minutes for the route's full service day, approximately 4:30 a.m. to 12:30 a.m., adding evening and late-night trips between downtown and San Diego International Airport.
Route 992 links the terminals with America Plaza, where riders can transfer to the trolley and other bus lines. The service change matters most outside conventional commute hours. Airline schedules begin before dawn and continue past dinner, while airport shifts start and end across the day. A 15-minute wait does not make every connection seamless, but it narrows the penalty for a missed bus and makes the published pattern easier to remember.
The expansion is funded through the San Diego Association of Governments' Airport Transit Connection program. MTS and SANDAG announced the change Wednesday with the San Diego County Regional Airport Authority. Their releases did not specify the number of trips being added, the annual operating cost, how long the funding is committed or the late-night frequency that the new schedule replaces. Those figures are needed to measure the service increase against its price.
Ridership provides the agencies' case for more capacity. MTS reported 398,790 Route 992 passenger trips in fiscal 2026, up from 165,908 in fiscal 2021, an increase of more than 140 percent. The comparison spans the pandemic recovery and a period of continued airport activity, so it does not isolate the effect of any single schedule change. It does show that nearly 233,000 more annual trips now move through a corridor where frequency can affect both tourists and workers.
The route's downtown endpoint expands the practical reach beyond America Plaza. Trolley connections can carry passengers north, east and south without parking at the airport, while other buses distribute trips through the central city. Travelers still have to account for luggage, transfers and the walk between stops and their final destination. For an employee leaving after midnight, the usefulness of a frequent airport bus also depends on whether the connecting line is still operating.
Another public option serves a different part of the network. The Airport Authority's free electric San Diego Flyer runs between the terminals and Old Town Transit Center, connecting with the trolley, COASTER and Amtrak. Route 992 remains the direct downtown link. Together, the services create two transfer points rather than one, but neither functions as a one-seat regional airport rail line. Their value is in the connections they can reliably meet.
Fifteen-minute service also changes the cost of uncertainty. A delayed flight or baggage claim can turn a half-hour schedule into a long curbside wait; a quarter-hour pattern reduces that exposure. Reliability still matters as much as scheduled frequency. Downtown congestion, terminal traffic and operator availability can stretch actual arrivals, and a published timetable cannot by itself show whether buses maintain even spacing through the day.
Sunday's rollout gives the agencies a clear operational test. MTS can compare evening and late-night boardings, on-time performance, missed trips and passenger loads before and after the change. SANDAG can then weigh those results against the added operating expense. If the new trips are dependable, the service will make a growing route useful across more of the airport's clock, not merely add frequency to a schedule on paper.