A layover at SDU.

LYVR doesn't have security wait times for SDU yet. It still times your walk between gates and through the terminal, so you can see how much of the layover is really free.

LYVR lists 1 lounge at SDU, 1 of them on Priority Pass. Which ones you can get into depends on your ticket, airline status, credit card or a lounge membership. Each lounge on this page lists what gets you in, and LYVR checks it against your own profile.

It depends on your terminals, whether you go through security or customs again, and how far apart the gates are. LYVR adds up deplaning, every walk through the terminal, any checkpoints your connection passes and the boarding door time, then shows exactly how much time you have to spare.

On one ticket, the airline won't sell you a connection shorter than the minimum it allows at SDU, and it rebooks you if a delay makes you miss it. Connecting to another country, with a security check on the way, is still more comfortable with 1.5 to 2 hours, and separate tickets need 3 or more. LYVR works out your exact time to spare for your own two gates.

With an hour or two, eat near your gate and walk the terminal. With more, SDU's 1 lounge (1 on Priority Pass) has quiet seats, food and often showers. LYVR's Explore tab lists every restaurant, bar and shop near your gate with the walk time, so you only see what fits in your layover.

On a domestic connection, yes, with enough time. On an international one, only if you're allowed to enter Brazil, since leaving SDU means going through passport control, and you'd want about 6 hours: the passport line both ways, the trip into Rio de Janeiro and back, and security on the way in. LYVR checks the ride each way, the time you'd have in the city and your passport's entry rule.