Yi Peng Sky Lanterns: Legality, Safety, and Where to Go

Yi Peng (literally "second [month] full moon") is the Lanna Kingdom's lunar-calendar festival of light, distinct from but historically merged with the central-Thai Loy Krathong. Lanna culture marks the full moon of the second northern month, which falls roughly a month later than the southern Thai calendar's twelfth month — both land in November on the Gregorian calendar in most years. Yi Peng's signature ritual is the release of khom loi sky lanterns, intended to symbolically carry away misfortune and bad karma into the sky. Yi Peng is also marked by paper lanterns hung from houses and temples, traditional Lanna dance, almsgiving at Wat Phra Singh and Wat Chedi Luang, and the floating of krathong on the moat and the Ping River (the Loy Krathong overlap). In Chiang Mai, the three-night celebration of Yi Peng + Loy Krathong is the city's biggest annual event.

Tourism Authority of Thailand calendars and Lanna lunar tables converge on 25 November 2026 (Wednesday) as the full moon, with the three-night Chiang Mai festival running Tuesday 24 November through Thursday 26 November. The Mae Jo University mass release is currently scheduled for Tuesday 24 November (the night before the full moon, traditional for the Dhamma-chai International Foundation event) with a second ticketed CAD Khomloy event on Sunday 22 November. Official confirmation usually publishes by July via the TAT Chiang Mai office. Do not book non-refundable flights to CNX during 21-27 November 2026 until you have checked CAAT NOTAMs in October; book Lampang (LPT) or Chiang Rai (CEI) as backup arrivals.

Releasing a sky lantern in Thailand outside a permitted zone is illegal under multiple statutes. The Air Navigation Act of 1954 (as amended) imposes fines up to 60,000 baht and up to three years' imprisonment for endangering aircraft; provincial governors in Chiang Mai, Lamphun, Chiang Rai and Phayao issue annual orders banning lantern releases except in licensed zones during specified hours. CAAT publishes NOTAMs annually that close or restrict CNX during 19:00-01:00 across the Yi Peng peak nights. In November 2024 (the most recent reported), 145 commercial flights to and from CNX were cancelled or rescheduled across 14-17 November, and Lampang/Chiang Rai diversions ran into the dozens; in November 2023 the figure was approximately 130 cancellations. Airline staff at CNX are matter-of-fact about this — buy a refundable fare or a backup ground-transport plan.

The famous postcard photo — thousands of lanterns rising in perfect silence above a Buddha statue — is the Yi Peng Lanna International event held on the Dhamma-chai International Foundation grounds at Mae Jo, about 20 km north of Chiang Mai city centre. The 2026 event is expected to ticket around 9,000-10,000 attendees on Tuesday 24 November, with simultaneous lantern release after a sunset Buddhist ceremony. Tickets are typically released between May and August through authorised resellers (Klook, GetYourGuide, Take Me Tour, local Chiang Mai agencies) at prices of US$100-180 per person depending on tier; the more expensive tier includes dinner, transport and reserved seating. The separate CAD Khomloy event (Sunday 22 November) and Doi Saket area events at smaller resorts run earlier in the week and ticket from US$80-150. Book by July.

If you miss the Mae Jo ticket window, several Chiang Mai resorts and restaurants run their own licensed lantern releases on smaller scale (10-100 lanterns) on the nights of 23-25 November 2026. Four Seasons Chiang Mai, Dhara Dhevi (now Inntel Chiang Mai), Anantara Chiang Mai, and 137 Pillars run private guest releases — guest-only, dinner-inclusive packages typically 4,500-9,500 baht per person. Some restaurants in the Mae Rim and Hang Dong areas (Khaomao-Khaofang, Pa Suk Restaurant) host community-licensed releases tied to dinner reservations. These are legal because the venues hold individual prefectural permits and confine the release to a single short window with fire safety supervision. Do not attempt to source lanterns at city markets and release them yourself — police actively patrol Tha Phae Gate, Nawarat Bridge and Wat Phan Tao during festival nights.

Each year, lantern releases cause wildfires (dry-season grasslands ignite when partly-burning lanterns descend), house fires, and injuries to livestock and wildlife. Most documented are water-buffalo casualties from ingesting the lantern's metal-wire frame, and rooftop fires in tightly-packed old-city neighbourhoods. Chiang Mai's air-quality situation — typically the world's worst in March-April from agricultural burning — has reduced public tolerance for the smoke contribution of mass releases. The TAT and Chiang Mai authorities have increasingly promoted krathong floats and paper lantern decoration over sky-lantern release. Foreigners caught releasing unpermitted lanterns in central Chiang Mai face on-the-spot fines starting at 5,000 baht in recent years.

If your CNX-bound flight is diverted to Lampang (LPT, 90 km south of Chiang Mai) or Chiang Rai (CEI, 190 km north), the airline is responsible for onward ground transport, but in practice on Yi Peng nights the buses are overcrowded and slow. Have a backup plan: pre-book a private car from LPT to Chiang Mai for 2,500-3,500 baht (Bolt and Grab work in Lampang), or a CEI-to-Chiang Mai shared van for 350 baht via Green Bus or Vipa Travel (~3 hours). Keep flight-cancellation receipts and any rebooking proof for your travel insurance claim. If your departure flight out of CNX is cancelled, the recovery flights typically run 24-48 hours later — budget for two extra hotel nights in November pricing (Chiang Mai hotels run +60% during Yi Peng).