Route 42B hits SMF every 30 minutes most weekdays
Yolobus Route 42B is the all-day public bus link between Sacramento International Airport (SMF) and downtown Sacramento, Davis, and Woodland, running roughly every 30 minutes on weekdays and about every 60 minutes late nights and on weekends. The route serves both Terminal A and Terminal B curbside on the lower level, so you board right outside baggage claim without re-clearing security. This is the cheapest fixed-route option from SMF, beating rideshares and taxis by a big margin.
A single Yolobus fare on Route 42B is typically just a few dollars per ride, with exact cash accepted on board and contactless options available on newer buses. Service usually starts in the early morning around 4:00–5:00 a.m. and runs past midnight, but late-night headways stretch to about an hour, so check the specific 42B timetable before you land. The same fare covers you all the way between SMF and downtown Sacramento or Davis, which can easily save $30–$50 compared with a Lyft or Uber at peak times.
At SMF, look for Yolobus 42B signs at the public transit stops in front of Terminal A and Terminal B; buses stop in the marked bus zone along the center curb. The destination sign on the front will show “42B” plus key endpoints like Davis, Sacramento, or Woodland, so verify the direction before you tap or pay. Bags ride in the main cabin with you; there’s no separate luggage bay, so plan to handle your own suitcase and keep it out of the aisle.
From the airport, Route 42B runs a loop that touches downtown Sacramento transit centers, then continues to UC Davis and Woodland depending on the time of day, with several key transfer points to SacRT light rail and other bus lines. Typical ride time from SMF to downtown Sacramento is about 25–35 minutes in light traffic, and 40–50 minutes to Davis when the freeway is clear. In heavy rush-hour congestion on I‑5 or I‑80, expect those times to creep up by 10–20 minutes.
There are no major recurring complaints tied to Route 42B at SMF, but riders do notice that late-night and Sunday service can mean a 45–60 minute wait if you just miss a bus. Seating is standard city-bus style and can feel crowded near shift-change hours and at student move-in periods around UC Davis. The stop is outdoors with limited shade at both Terminal A and Terminal B, so in July and August heat, that 15–20 minute wait can feel long.
One tip: screenshot the 42B schedule and map before your trip while on Wi‑Fi at home or in the terminal; cell data around the curb can be spotty when lots of people are streaming, and having the timetable on your phone saves you from guessing if it’s a 5-minute wait or a 45-minute one.