How early should I get to SMF?
Sacramento International Airport, Sacramento, CA · Checked Oct 26, 2026
The short answer
SMF says to check with your airline, and gives a rule of thumb of 2.5 hours before a domestic flight. You may be denied check-in if you arrive less than 45 minutes before your flight.
SMF's rule of thumb is 3 hours before an international flight
Those are blanket rules. Your real number depends on your terminal, the time of day, traffic from your door, and whether you have PreCheck or a bag. Leave By works out your exact leave time.
Source: flysmf.gov
Security lines at SMF
SMF does not publish typical peak times. In TSA's hourly screening counts for Sep 13-19, 2026, SMF was busiest from 4am to 7am, peaking 5-6am. There was a second rise from about 9am to noon, peaking 11am-noon. Traffic was much lighter after 7pm. Friday, Thursday, Sunday and Monday were the busiest days that week; Saturday and Tuesday were the quietest.
Busiest times: 4:00-7:00am (peak 5:00-6:00am), 9:00am-12:00pm (peak 11:00am-12:00pm), Fridays, Thursdays, Sundays and Mondays (TSA counts, week of Sep 13, 2026).
Nationally, TSA checkpoints are busiest from 5 to 7 AM local time. See TSA's hourly numbers and the busiest days to fly.
TSA PreCheck: CLEAR's SMF page lists TSA PreCheck at both Terminal A and Terminal B, but gives two different sets of hours, so check before you go. SMF says every airline also runs a priority lane at both checkpoints, with its own rules for who can use it.
CLEAR: Available at this airport (see terminals below for which checkpoints).
Touchless ID: Southwest lists SMF among its TSA PreCheck Touchless ID airports. You need a Rapid Rewards account, PreCheck with a valid KTN, a valid passport, and a mobile boarding pass, and you must be 18 or older. This research did not confirm which other airlines offer it at SMF.
Terminals and checkpoints
Terminal A
American Airlines, Delta, United Airlines, Air Canada
- Ticket counters are on the ground level
- Terminal A is a separate building from Terminal B and is not connected after security
Terminal B (Concourse B)
Southwest, Alaska Airlines, Frontier, JetBlue, Aeromexico, Volaris
- Ticket counters are on level 2. Airport shuttles stop at the east entrance of the ground (baggage claim) level.
- A new walkway between Terminal B and Concourse B is under construction and is expected to open in the first quarter of 2027
Between terminals: Terminals A and B are separate buildings and are not connected after security. Walking takes about 10 minutes through the parking garage (sky bridges from Terminal A level 2 and Terminal B level 3) and is the fastest way. Free shuttles also run between the terminals 24 hours a day; SMF's FAQ says to take the Daily Lot shuttle, which leaves every 10 minutes from the ground transportation curbs. You must clear security again in the other terminal.
Terminals are not connected after security. Go to the right terminal the first time.
Getting to SMF
Rideshare and taxi: Uber, Lyft and Wingz operate at SMF. Pickup is at the ground transportation curb, in designated areas shown on SMF's maps. The curb is only for active loading and unloading; vehicles that wait or are left unattended may be ticketed or towed. Drivers waiting to pick up can use the free waiting area.
Transit: SacRT Route 142 runs between downtown Sacramento and Terminals A and B. SacRT lists it as hourly, about 5:15am-10:33pm daily, for $2.50. SMF says it runs every 20-30 minutes when combined with Yolobus Routes 42A and 42B, which also serve Davis and Woodland.
Driving and parking: Parking is first-come, first-served, with no reservations. Current daily maximums: Garage 1 $21 (sky bridges to both terminals), Daily Lot $14 (shuttle every 15-20 minutes) and Economy lots $12 (shuttle every 25-30 minutes). SMF says to allow up to 60 minutes from the Economy lots to the terminal. Lots can fill and close without notice. Booths no longer take cash; pay cash at pay-on-foot kiosks. When Garage 2 opens (expected fall 2026), daily rates rise to $28 (garage), $19 (Daily) and $14 (Economy).
Construction and changes in 2026
- Garage 2, with about 5,500 spaces west of Terminal B, is expected to open in the fourth quarter of 2026. Parking rates go up when it opens.
- SMF lists construction of a new Terminal A exit road as starting in the second quarter of 2026, with opening expected in the fourth quarter of 2027. SMF has not published lane closures for it.
- Concourse B expansion (6 more gates) is scheduled to start construction in the fourth quarter of 2026
- A pedestrian walkway between Terminal B and Concourse B is under construction and is expected to open in the first quarter of 2027
Checking a bag
Southwest: check bags at least 45 minutes before a domestic flight's scheduled departure (60 minutes for international), and check in at least 30 minutes before a domestic flight. Delta: bags 45 minutes before domestic departure, check-in 30 minutes without bags. United and American: check in and check bags 45 minutes before most domestic flights. Alaska: check in at least 50 minutes before a domestic flight (AP, May 2025). SMF warns you may be denied check-in less than 45 minutes before departure.
SMF tips first-timers miss
- Check your terminal before you leave. Southwest, Alaska, Frontier, JetBlue, Aeromexico and Volaris use Terminal B; American, Delta, United and Air Canada use Terminal A. The terminals are not connected after security.
- In Terminal B, security is on Concourse B, after the people mover ride from level 3. Allow a few extra minutes for the train.
- Security opens at 4am, and 4-7am was the busiest stretch in TSA's counts for mid-September 2026. Arrive early for first-wave flights.
- Parking in the Economy lots? SMF says to allow up to 60 minutes to reach the terminal, and lots can fill and close without notice.
- Parking rates rise when Garage 2 opens, expected in late 2026; the Economy lots go from $12 to $14 a day
Leaving for SMF?
Pick your flight and where you're starting. Leave By checks live traffic, security lines and your terminal, and tells you the minute to walk out the door.
Free. No account.
Questions travelers ask
How early should I get to Sacramento airport (SMF)?
SMF says to check with your airline. Its rule of thumb is 2.5 hours before a domestic flight and 3 hours before an international flight. Mornings, especially 4-7am, are the busiest at security.
Which terminal is Southwest at SMF?
Terminal B. Check in on level 2, then take the people mover from level 3 to Concourse B, where the security checkpoint is.
Are SMF's Terminal A and Terminal B connected?
No. They are separate buildings. Walking through the parking garage takes about 10 minutes, or take the Daily Lot shuttle, every 10 minutes. You must go through security again in the other terminal.
What time does security open at SMF?
SMF says TSA checkpoints open at 4am daily and close at 12:30am, depending on flight schedules.
Does SMF have TSA PreCheck and CLEAR?
Yes. CLEAR lists lanes at both terminals: Terminal A 4am-10pm Sunday-Friday and 4am-5pm Saturday, and Terminal B 4am-8pm. CLEAR's page also lists PreCheck at both terminals.
Sources
- SMF - Frequently Asked Questions (arrival advice, checkpoint hours, terminals, curb rules)
- SMF - Security Information
- SMF - Airlines (terminal by airline)
- SMF - Inter-Terminal Directions (PDF)
- SMF - Parking
- SMF - Parking rate changes support new garage (Sep 17, 2026)
- SMF - SMForward project timelines
- SMF - App Based Ride Share
- SMF - Public Transportation
- SacRT - Route 142 Airport Express
- CLEAR - Sacramento International Airport locations & hours
- Airport Improvement - SMF airside concourse and people mover (Nov 1, 2011)
- Chase - A guide to Sacramento International Airport
- Southwest - TSA PreCheck Touchless ID (participating airports)
- Southwest - When to arrive for your flight (check-in and bag deadlines)
- Delta - Check-In Times at U.S. Airports
- AP via MyNorthwest - United narrows check-in window; airline comparison (May 27, 2025)
- TSA throughput data, September 13-19, 2026
Airport conditions change. Always follow your airline's check-in and bag-drop deadlines.