Flights from Guam, Guam (GUM) to San Francisco, CA (SFO)

Tips when travelling through GUM

The Antonio B. Won Pat International Airport (GUM) in Guam is the closest US airport to Japan and Korea with major commercial service. It's a popular tourist destination for those countires, much like Hawaii is for the US West coast.
Guam has distinct Customs rules from the rest of the United States. You'll have to go through Customs whether you came from the mainland US or elsewhere.
Guam also has distinct Immigration rules from the rest of the US. The rules are generally less stringent than for the rest of the US, with many more countries' citizens allowed to visit without going through the standard visa process.
The Guam airport was built before modern rules on separating passengers who were security-screened in the US from those that weren't. To comply with these rules, the airport has instituted an awkward moving-wall separation system, which often requires airport employees to corral passengers of one kind in the hallways while passengers of the other kind go through.

Tips when travelling through SFO

The best vegetarian food at San Francisco International Airport (SFO) is the veggie burger at Plant in Terminal 2 after security
There's a walkway between Terminal 3 and International G, and you don't have to re-clear security. That means more food and shopping options than you'd otherwise have if you stayed in just one. It also means that if the security line at one of the terminals is long, you can clear security at the other one.
You can bike to San Francisco International Airport and park your bicycle for free

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