What is the busiest time at SFO?

SFO's pretty much busy from 7:15 a.m. on to mid-evening. The first peak departure time is from 7:15 to 8:45, with first peak arrival time from 8:30 to 10:30 a.m., and then it just keeps going. The international flights pick up later in the day. The airport's basically at capacity.



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The general guideline on how early to get to the airport for a domestic flight is 2 hours. However, those traveling at a very busy time of year or out of a large airport might want to allow more time.

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SFO's 24-hour, year-round AirTrain people mover has station departures about every four minutes, and takes about five minutes to travel between each terminal.

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Making a reservation in advance is a great way to skip TSA's sometimes exorbitantly long lines. However, if you're flying out of an airport that doesn't have this program, you may instead want to consider enrolling in TSA PreCheck or Clear.

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Allow enough time: Customs can be time-consuming, especially during peak travel periods. Make sure you allow enough time to clear customs and get to your connecting flight. As a general rule, it's best to allow at least two hours for international layovers.

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Typically, flights are more expensive and airports more crowded on Fridays, Saturdays, Sundays, and Mondays as weekend and long-weekend trips are the most common for both business and pleasure travelers.

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Enroll in TSA PreCheck, Global Entry, or Clear to make your way through faster. With TSA PreCheck, you keep on your shoes, belt, and light jackets while going through security. Around 200 airlines participate in the program, as well as 85 airports, so if you travel often, it's worth the $70 to $80 annual fee.

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The General Guideline for How Early You Should Get to the Airport. Generally speaking, most airlines advise that you arrive at the airport at least 2 hours prior to a domestic flight, and at least 3 hours prior to an international flight.

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You should arrive 2 hours earlier for short-haul or domestic flights. As for long-haul or international flights, arriving 4 hours before the scheduled flight time should do the trick.

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You'll need to clear customs and immigration. Next, you'll recheck your luggage for the domestic flight. Finally, you'll need to go through Transportation Security Administration screening. This may include a physical inspection of your luggage and personal items with a metal detector or a full-body scan.

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