Dianne Feinstein International Terminal

G gates link straight into Terminal 3 without leaving security

The Dianne Feinstein International Terminal covers Concourses A and G, with 29 widebody gates handling most long‑haul departures at SFO. G connects airside to Terminal 3, so United and Star Alliance flyers can walk from a domestic United arrival straight into the international side and hit their next flight or lounge without re‑screening. Expect a 10–20 minute walk from far T3 gates to the middle of G, longer if you’re coming from the end of the E or F pier.

A is oneworld and others, G is United and Star Alliance

Concourses split by alliance: International A holds British Airways, Cathay Pacific, Japan Airlines, Air France and other oneworld or non‑Star carriers, while International G is home base for United’s long‑haul plus partners like Lufthansa, Air Canada, Singapore Airlines and All Nippon Airways. Check your boarding pass for “A” vs “G” and plan your drop‑off on the departures level accordingly; a curbside mistake here can easily add 10 minutes of walking or a loop of the terminal road.

Immigration in A can hit 45–60 minute queues at night

Arrivals into International A draw multiple Asia and Europe flights between roughly 6 p.m. and 10 p.m., and TripAdvisor reports of 45–60 minute immigration lines during those banks are common. Flyers on Reddit note that the far‑right passport lanes sometimes move faster because most people stack into the middle lines first, so scan the room before you commit. After passport control, you still pass baggage claim and customs in the same hall on the arrivals level before exiting into the public area.

Global Entry office sits on the arrivals level of International

The Global Entry Enrollment Center is on the International Terminal arrivals level, close to the exit from customs, which makes it practical to schedule an interview after a long‑haul arrival if your flight lands before the office closing time. Build at least 30–45 minutes of buffer beyond your scheduled landing for immigration, plus more in the evening peaks. Check CBP’s posted hours before you gamble on a same‑day interview slot here.

Walk past the last gates in A and G for quieter seats

Google reviews call out quieter corners at the far ends of both A and G, usually just beyond the final marked gates where there are extra rows of chairs and more open outlets. These pockets sit 5–10 minutes’ walk from the central atriums, so they stay relatively empty even when multiple widebodies are boarding. If you need to charge a laptop or let a kid stretch out on three seats, head away from the food court and toward the end of the pier.

Food is better in the main International hall than deep in A

British Airways and Cathay regulars on FlyerTalk often skip eating near the A‑gates and instead aim for the main International food court in the central check‑in hall, a few minutes’ walk from security. Options rotate, but you reliably find higher‑quality full meals here than at the satellite spots near A’s gates, which lean more toward basic grab‑and‑go. Plan on a 10‑minute round‑trip walk from a mid‑A gate if you want something decent before a late‑evening departure.

United regulars beeline to the Polaris Lounge in G

United long‑haul passengers coming from Terminal 3 often follow the airside connector signs straight into G and then up to the Polaris Lounge, skipping the public side completely. Flyers on FlyerTalk describe the domestic‑to‑G walk as “doable but not short,” roughly 10–15 minutes from D or F gates, so they head over as soon as the inbound parks rather than lingering near the domestic gate. Don’t waste a Polaris visit on a 35‑minute connection; build at least 90 minutes if you care about a shower or full meal.

Airside walk extends from G through T3 and on toward T2/T1

Once you clear security in International G or Terminal 3, you can walk airside all the way into T2 and T1 under current SFO layouts, which opens up more domestic‑side food and lounge options on long layovers. TripAdvisor and Reddit users describe the full International G to T1 trek as “deceptive” in distance; count on 20–25 minutes one way if you go gate‑to‑gate. Check your boarding time and build a hard return cutoff so you’re not doing a gate‑sprint back to an A or G departure.

Tight domestic–international connections under 60 minutes are risky

Regulars on TripAdvisor warn that anything under an hour from a domestic arrival in T3 to an A‑gate international departure at SFO is dicey, especially during evening banks. You may face a long hike from a far F or E gate plus a fresh security check at A if your bags are not checked through or you mis‑route yourself landside. One practical tip: if you can pick flights, aim for at least 90 minutes on domestic‑to‑international pairs here and add 30 more if kids, checked bags or mobility issues are in the mix.