How does Airport Busyness Predictor work?

Airport Busyness Predictor analyzes real-time flight schedules from FlightAware to predict crowd levels. It considers the number of departures and arrivals, aircraft sizes, and historical patterns to recommend the best time to arrive at the airport.

How many airports are supported?

Airport Busyness Predictor supports 331 airports worldwide, including 128 US airports and 203 international airports across all continents.

When should I arrive at the airport?

The recommended arrival time depends on crowd levels. For domestic flights: 90 minutes (low crowds) to 2.5 hours (extreme crowds). For international flights: 3 hours (low crowds) to 4 hours (extreme crowds).

Is the airport crowd data real-time?

Yes, for flights within 48 hours, the data comes directly from FlightAware's real-time flight schedules. For dates further out, estimated predictions are provided based on typical patterns.

SFO Airport Crowd Levels & Wait Times — San Francisco International Airport

SFO is the largest airport in Northern California and a major hub for United Airlines. Known for its museums, aquarium, and the first airport yoga room in the world. Fog can cause frequent delays, especially in summer.

Planning to fly from SFO?

Check Current Busyness

SFO crowd patterns — by the numbers

From our model

We modeled a full typical week at SFO — every hour, every day, every aircraft size — to surface patterns that show up week-over-week. Here's what San Francisco International actually looks like.

Peak hour

9 AM

busiest typical time

Quietest hour

7 PM

easiest TSA

Daily flights

737

dep + arr typical

Weekday vs weekend

4.9 / 4.3

weekdays busier

When is SFO actually busy?

Crowd score by local hour, averaged across the typical week. Hover any bar for the exact value.

12 AM: 7.67

1 AM: 7.13

2 AM: 7.29

3 AM: 5.18

4 AM: 5.27

5 AM: 5.54

6 AM: 5.53

7 AM: 5.13

8 AM: 4.92

9 AM: 7.85

10 AM: 7.34

11 AM: 6.93

12 PM: 7.16

1 PM: 7.44

2 PM: 2.77

3 PM: 2.98

4 PM: 2.71

5 PM: 2.8

6 PM: 3.06

7 PM: 2.51

8 PM: 2.91

9 PM: 2.99

10 PM: 2.59

11 PM: 6.72

12 AM6 AM12 PM6 PM11 PM

LowMediumHighExtreme

Best times to fly out of SFO

7 PM
Late-evening wind-down
low
10 PM
Off-peak hours
low
4 PM
Brief afternoon dip before evening rush
low

Worst times to fly out of SFO

9 AM
Morning business rush — heaviest TSA volume
medium
1 PM
Sustained peak window
medium
10 AM
Late-morning leisure departures stack on top of business connections
medium

Day of the week: when is SFO most painful?

Avg crowd score across daytime hours (6 AM – 10 PM local).

5.28

4.61

4.72

4.7

4.97

4.04

4.51

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Aircraft mix at peak hour

Wide-body and regional jets disproportionately affect crowd levels — they unload at very different rates.

Narrow Body38 aircraft · 71.7%

Wide Body6 aircraft · 11.3%

Regional9 aircraft · 17%

How SFO compares to other major hubs

Avg crowd score across daytime hours. Lower = easier travel day.

Terminals & Airlines

Terminal 1

Southwest, Frontier, JetBlue

Budget carriers - Harvey Milk Terminal.

Terminal 2

American, Alaska, Virgin

Newest terminal - excellent amenities.

Terminal 3

United

United domestic flights - recently renovated.

International Terminal (G)

International carriers

Allow extra time - large terminal with long walks.

Security & TSA Tips

•TSA PreCheck in all terminals
•CLEAR available in T1, T2, T3, Int'l
•Morning fog can cause delays - check flight status
•Terminal 3 United hub is busiest 6-10 AM
•International Terminal G requires AirTrain - allow 15+ extra min

Average Security Wait Times

Low

10-15 min

Medium

20-30 min

High

35-45 min

Extreme

50+ min

Parking & Transportation

Parking Options

Economy$20/day - Long-term garage

Daily$39/day - Domestic hourly lot

Hourly$6/hour - Domestic hourly

💡 BART runs directly to airport ($9.65 from downtown). Much faster and cheaper than driving.

Public Transportation

•BART: Direct service to downtown SF, Oakland, and beyond
•Caltrain: Connect via BART to Millbrae station
•SamTrans: Bus service to Peninsula cities
•AirTrain: Free connection between terminals and BART/rental cars

Dining & Food

Cat Cora's Kitchen

T2 • Mediterranean

Iron Chef Cat Cora's restaurant

Napa Farms Market

T2 • California

Local, fresh California cuisine

Wakaba

Int'l G • Japanese

Authentic Japanese food

Bun Mee

T1 • Vietnamese

Popular Vietnamese sandwiches

Amenities

Free WiFiSFO Museum (free exhibitions)Yoga room (T2)AquariumPet relief areas

Nearby Hotels

Grand Hyatt at SFOHyatt Regency SFOThe Dylan at SFO

Ready to check how busy SFO will be?

Check Airport Busyness