A layover at SIN.

LYVR doesn't have a security wait feed for SIN 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 14 lounges at SIN, 10 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 re-clear security or customs, and how far the gates are apart. LYVR adds up deplaning, every walk on the indoor map, any checkpoints your connection passes and the boarding door time, then shows exactly how much time you have to spare.

For a connection on one ticket, airlines won't sell you less than SIN's minimum connection time, and they rebook you if a delay makes you miss it. An international transfer with security screening 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, SIN's 14 lounges (10 on Priority Pass) have quiet seats, food and often showers, and there are restaurants and spas you can use with Priority Pass. 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.

Only if you're allowed to enter Singapore, since leaving SIN means going through immigration, and you'd want about 6 hours: the passport line both ways, the trip into Singapore 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.