NT$80 rice burgers and fries before your KHH flight
Mos Burger at Kaohsiung International Airport sits airside in the international I terminal, so you order after security and immigration. It runs typical airport hours tied to departures, usually opening ahead of the first morning flights and closing after the last evening bank, so expect service from roughly 06:00 to around 22:00 depending on the day’s schedule.
This is the same Japanese Mos Burger chain you see in town, with rice burgers, teriyaki beef, and shrimp burgers all in the NT$80–NT$150 range. Sets with fries and a drink usually land around NT$140–NT$180, cheaper than most sit-down spots in KHH and competitive with what you’d pay in Kaohsiung city.
Menu basics include the Mos Burger with meat sauce, a yakiniku-style beef rice burger, and chicken options; portion sizes track the standard Taiwan outlets, so a set is enough for one person but not huge. Coffee, tea, and soft drinks run about NT$35–NT$60, useful if you need a quick caffeine hit before a morning departure to Tokyo or Hong Kong.
Speed is airport-fast-food level: expect around 5–10 minutes from order to tray during normal traffic, and more like 10–15 minutes if several widebody international departures from I are boarding around the same time. There are counter seats plus a handful of tables directly in front, and it’s close enough to gates in I that you can still board a regional flight with a 30–40 minute buffer.
One practical play: order a rice burger set to eat on the spot, then grab an extra burger à la carte for the plane, which holds up better than most airport sandwiches on a 2–3 hour sector. If your boarding pass shows a domestic D gate connection later, eat here first; once you leave I for D, landside options are thinner and often close earlier.