SFO has separate terminals (T1, T2, T3, and International A/G) connected by train and walking. Domestic connections within the same terminal are quick (15-45 min MCT). International to domestic requires security recheck and 45-60 min MCT. Average security wait is 22 minutes. Use the AirTrain for fast inter-terminal transfers; T3 to INTL-G is just 7 minutes walking or 2 minutes by train.

["International-to-domestic connections require security recheck and immigration processing, extending MCT to 45-60 minutes","Long walks between terminals (up to 18 minutes between T3-E and INTL-A); some require navigating through busy passenger flows","INTL-A to INTL-G involves security recheck despite both being international, adding unexpected delays"]

United Polaris Lounge (INTL-G, near gate G1, rating 5/5) offers showers and private rooms for premium recovery, accessible with boarding pass or frequent flyer status. For non-status passengers, The Club SFO (Terminal 1, rating 4.2/5) has showers and pay-per-use access. Both support jetlag recovery with shower facilities essential for long-haul travelers.