A long layover doesn't have to mean stale sandwiches and uncomfortable chairs. A handful of airport lounges around the world throw in complimentary spa treatments — everything from hot stone back massages to jet-lag facials — and some of them are genuinely excellent, not just a token perk.

The gold standard sits in Australia. Qantas runs spas in its first class lounges in both Melbourne and Sydney, offering a 20-minute treatment per guest: your pick of a facial, neck and shoulder massage, hot stone back massage, or foot massage. The setting is widely considered the nicest of any lounge spa anywhere. First class passengers can book by email a day before flying; oneworld Emerald members and others take their chances on arrival.

Stateside, the Chase Sapphire Lounge network is a surprise contender. Locations at New York LaGuardia, Philadelphia, and Dallas Fort Worth offer free 30-minute facials from Face Haus to anyone with lounge access. You book by scanning a QR code in the lounge — though demand is high and appointments go fast.

Air France is currently the only major airline offering spa treatments to both premium cabins. Its Clarins-partnered lounges in Paris, New York, Los Angeles, and London give business class passengers and Flying Blue Platinum and Gold members a free 20-minute face treatment, with menus including jet-lag relief, detox time, and an eye-mist. La Première passengers transiting Paris get an upgraded 30-minute session with Sisley instead.

Cathay Pacific's The Pier and The Wing first class lounges in Hong Kong offer 15-minute foot reflexology, head, neck and shoulder massages, or an eye revitalizer. Diamond members and first class flyers can reserve via the app; everyone else queues. Etihad's Abu Dhabi spa is another strong option — first class passengers and Guest Platinum members get a free 15-minute treatment, and appointments are usually easy to snag. Emirates' Dubai first class spa offers 15-minute massages and stretches too, though the author finds it feels like an afterthought and books up quickly.

There are also a few under-the-radar wins. The Encalm Xenia contract lounge in Delhi gives every guest a massage — officially 10 minutes, often closer to 20. Delta's excellent Delta One Lounge at JFK offers 10-minute eye treatments and massages to anyone inside. And in Bangkok, The Coral Finest Business Class lounges throw in 15-minute shoulder massages even for Priority Pass holders — a rarity for that tier of access. Worth knowing too: many Be Relax airport spas accept Priority Pass for free massages, though some credit-card-issued memberships exclude these experiences.

If you're booking a premium cabin or hold the right frequent flyer status, a spa slot can genuinely transform a long-haul travel day. The practical advice is consistent across the board: most lounges run these on a first come, first served basis, so ask about availability the moment you walk in — or better, reserve ahead where the airline allows it.