Lotte Duty Free

Main Terminal Lotte Duty Free opens roughly with the first departures

Figure early-morning to late-evening hours, matching most outbound flights from GUM’s Main Terminal. The store sits airside after security in the international departures area, so this is a last-call stop once you’re through passport control. You’ll walk past it on the way to most gates, and it’s big enough that you can do a single sweep in 10–15 minutes without stressing your boarding time.

Lotte Duty Free runs the usual duty-free mix: liquor, perfume, cosmetics, tobacco, snacks, and some travel gifting items. Expect regional spirits and mainstream whisky brands at tax-free pricing that usually beats downtown Guam shops by a few dollars per bottle. Beauty counters skew heavily to Korean and Japanese labels, with travel sets often under USD 50. If you need a quick present, look at boxed sweets and chocolates stacked near the central aisles.

Alcohol and fragrance are the strongest categories; electronics and random gadgets feel more like filler. Pricing is generally in US dollars and aligns with other Lotte locations in Asia-Pacific, so you won’t see crazy airport markups on standard bottles or skincare. Staff handle duty-free bag sealing for transit rules, which helps if you’re connecting onward to places like Japan or Korea with stricter liquid rules.

Timing tip: hit Lotte Duty Free right after immigration instead of waiting until boarding, since late-evening banks of flights from GUM can create short checkout lines 20–30 minutes before departure.