Last Updated on July 9, 2026 by Daniel Globe
You can usually reach SFO before sunrise using BART, though the exact first-departure times depend on the day and on which end of the trip you’re measuring. BART’s own airport page lists 4:58 a.m. as the first train departing SFO on weekdays, 5:47 a.m. on Saturdays, and 8:08 a.m. on Sundays — and system-wide, BART’s general service hours run from about 5:00 a.m. weekdays, 6:00 a.m. Saturdays, and 8:00 a.m. Sundays until midnight. If your flight leaves before those hours, you’ll want a taxi, rideshare, or SamTrans backup. AirTrain runs all day, and the details below help you plan smarter.
Quick Answer
BART runs roughly 5:00 a.m.–midnight on weekdays, 6:00 a.m.–midnight Saturdays, and 8:00 a.m.–midnight Sundays. If your flight departs before those hours, use a taxi, rideshare, or an overnight SamTrans route instead — BART won’t get you there in time.
Key Takeaways
- BART’s earliest weekday service starts around 5:00 a.m.; Saturdays around 6:00 a.m.; Sundays not until 8:00 a.m.
- The last train serving SFO leaves around midnight every night.
- AirTrain connects every terminal to the BART station 24/7, roughly every 4 minutes.
- SamTrans Route 292 and other overnight routes are your best bet when BART isn’t running.
- Always check BART’s live Trip Planner before you go — schedules shift periodically and delays do happen.
When Does BART Start for SFO?
BART starts early enough for many SFO travelers, but the exact time depends on the day and direction. On weekdays, system service generally begins around 5:00 a.m., which works well for early travelers with morning departures.
Saturday service begins later, around 6:00 a.m., giving you a bit less runway if you’re flying out on the weekend. On Sundays, service doesn’t start until around 8:00 a.m., so you’ll likely need another ride if your flight leaves early.
Note: BART also publishes separate “first train departing SFO” times (4:58 a.m. weekdays, 5:47 a.m. Saturdays, 8:08 a.m. Sundays) for travelers heading the other direction, out of the airport. Don’t confuse this with the time a train first arrives at SFO from downtown — use BART’s Trip Planner to check the actual arrival time for your specific starting station.
The last train to SFO leaves around midnight, so late-night travelers should plan ahead too. To stay in control of your trip, check the BART schedule online before you leave.
The last BART train serving SFO leaves around midnight, so late-night travelers should check the live schedule before heading out.
That way, you’ll catch any service changes and move through the city with confidence.
Which Transit Gets You to SFO Before Sunrise?
If you need to get to SFO before sunrise, BART is usually your best public transit option, but only on certain days.
On weekdays, service generally starts around 5:00 a.m., which makes early travel possible without booking a private ride.
On Saturdays, service starts around 6:00 a.m., and on Sundays it doesn’t start until around 8:00 a.m., so weekend pre-dawn plans need other transit options.
If you must arrive earlier than BART’s first run, consider a taxi or rideshare like Uber or Lyft.
SamTrans buses run 24/7 on some routes, but late-night airport service is limited and may not be direct.
Caltrain won’t get you to SFO in the early hours on its own — you’d need to transfer to BART at Millbrae.
When Do Early BART Trains Reach SFO?
If you’re catching an early flight, plan around BART’s general weekday start of about 5:00 a.m., which can get you to the airport well before most flights depart — trips from downtown San Francisco typically take about 30 minutes.
On Saturdays, service starts around 6:00 a.m., while Sunday service doesn’t start until about 8:00 a.m.
BART Morning Service Times
Early morning BART service starts as early as roughly 5:00 a.m. on weekdays, giving you a reliable way to reach the airport before most flights depart. You can plan around the BART schedule with confidence, especially if you need an early arrival for a tight check-in.
On Saturdays, service begins around 6:00 a.m., while Sundays begin later around 8:00 a.m., so you’ll want to adjust your travel plans accordingly. Since service can shift with schedule updates, check BART’s Trip Planner before you leave.
If your flight takes off before service starts, taxis or ride-sharing can bridge the gap.
First Trains To SFO
Exact first-arrival times at SFO vary by your starting station, so use BART’s Trip Planner for a precise time. As a general guide:
At a Glance
| Weekday service starts | ~5:00 AM |
| Saturday service starts | ~6:00 AM |
| Sunday service starts | ~8:00 AM |
| Last train nightly | ~Midnight |
If you’re flying out before sunrise, weekday service gives you the most flexibility. Saturday still works for many early connections, but Sunday starts noticeably later, so you may need a backup plan.
Warning: BART has noted planned evening delays and single-tracking work affecting the Millbrae–SFO–San Bruno segment during 2026 as part of train-control modernization. Check BART’s SFO station alerts page before a late-night trip.
How AirTrain Connects You to the BART Station
You can catch the AirTrain from any SFO terminal and ride it straight to the BART station, with trains running 24 hours a day and arriving roughly every four minutes.
For the fastest option, take the Red Line, which reaches the BART connection in about 9 minutes.
For easy access, use the Mezzanine Level at Terminals 1 and 2, the short walk from the International Terminal, or the Garage G stop if you’re transferring to wider Bay Area transit.
AirTrain To BART
Getting from the airport terminals to BART is straightforward with the AirTrain, which runs 24/7 and arrives roughly every four minutes.
Ride the Red Line, and in about 9 minutes you’ll reach BART. From Terminals 1, 2, and 3, take elevators or escalators to the Mezzanine Level, then follow the signs. If you’re in the International Terminal, head to Level 4 near Gates A or G.
Station Access Routes
AirTrain links every SFO terminal to the BART station with a free, nonstop shuttle. The Red Line is the fastest route, looping every few minutes.
If you’re coming from the International Terminal, you can also ride to Garage G, then follow signage to BART. Elevators and escalators are available for travelers with luggage or mobility needs, and the system runs 24/7 for early departures or late arrivals.
- Use the Red Line for the quickest transfer.
- Exit at Garage G for International Terminal access.
- Rely on elevators and escalators if needed.
- Transfer anytime, day or night.
Pro Tip: If you’re unsure which AirTrain line to take, follow signage toward “BART/Rental Cars” — both the Red and Blue lines eventually reach the BART station, just via different stops.
SamTrans and Airporter Options for SFO
SamTrans offers a practical bus connection to SFO, with Route 292 running to the airport from several points, while select routes also provide limited late-night service. EPX and Route 142 stop at the Rental Car Center, from which you can ride the AirTrain Blue Line into the terminals. At SFO, buses serve Terminal 2, Terminal 3, and the International Terminal at the Arrivals/Baggage Claim Level.
| Option | Service | Access |
|---|---|---|
| Route 292 | Frequent, extended hours | Multiple pickup points |
| EPX/142 | Airport-linked | Rental Car Center |
| Airporter services | Scheduled rides | Center island zones |
Marin Airporter and Groome Transportation may require reservations, but they offer a dependable way to travel from farther counties.
Best Alternatives When BART Is Closed
When BART is closed, you still have several practical ways to reach SFO.
- SamTrans offers late-night options on select routes when BART isn’t running.
- Taxis and rideshares like Uber and Lyft remain available at the airport, so you can book a direct trip on your own schedule.
- AirTrain operates all day and night, letting you move freely between terminals and parking garages, though it won’t connect you to BART during BART’s closed hours.
- Private shuttles such as Marin Airporter and Groome Transportation work well if you prefer a reserved seat and set pickup plan.
If you’re headed toward San Francisco or San Jose, Caltrain can also help, but you’ll need to catch a Millbrae-bound BART train before midnight and plan your transfer carefully.
How to Plan Around BART’s Hours
If you’re planning a trip to SFO around BART’s schedule, check the live timetable before you leave so you can match your departure to service hours and avoid unnecessary stress.
On weekdays, service generally starts around 5:00 a.m. On Saturdays, it begins around 6:00 a.m., while Sundays don’t start until around 8:00 a.m., which can disrupt dawn flights.
Build your plan around those times, and give yourself a buffer for station access, transfers, and luggage.
If your flight leaves before BART runs, book a taxi or rideshare instead of gambling on a delayed arrival.
Frequently Asked Questions
How early should I get to SFO for a 7 a.m. flight?
Aim to arrive by around 5:00 a.m. That gives you time for check-in, security, potential delays, and boarding, while keeping your morning travel choices flexible.
How do I get to SFO using public transportation?
Ride BART, checking current hours (roughly 5:00 a.m. weekdays, 6:00 a.m. Saturdays, 8:00 a.m. Sundays), then take the free AirTrain to your terminal. SamTrans Route 292 is another option that runs extended hours.
Is public transport 24/7 in San Francisco?
No. BART closes overnight, roughly midnight to 5 a.m. depending on the day. AirTrain runs 24/7 within SFO, and some SamTrans routes offer late-night service.
Is 2 hours enough time to get through customs at SFO?
Usually yes for international arrivals, but check peak times, use Global Entry or kiosks if eligible, and budget extra time for bags and connections.
Conclusion
If you’re catching an early flight, plan ahead and know your transit options. BART doesn’t always run at the crack of dawn, so you may need SamTrans, an airporter, or a rideshare to reach SFO on time. Once you’re there, AirTrain makes the final connection simple. Check schedules the night before, and you’ll arrive calmer, earlier, and ready to board.
Sources
- BART Airport Connections (SFO & OAK) — first-train departure times from SFO, station access, and route details
- BART Schedules — official system-wide service hours by day
- BART SFO Station Page — current alerts, single-tracking and delay notices