Ha Long Bay, Lan Ha Bay or Bai Tu Long Bay: which to cruise

All three are parts of one limestone seascape. Ha Long Bay covers 1,553 km² and 1,969 islands in Quang Ninh province, and its World Heritage core, listed in 1994 and 2000, holds 775 of them. In 2023 UNESCO extended the site to the Cat Ba Archipelago in Hai Phong, which includes Lan Ha Bay: the property is now 656.5 km² with 1,133 islands, 358 of them around Cat Ba (Ha Long Bay Management Board). Cruises sold as Bai Tu Long sail the north-east of the same Ha Long heritage area, on the province’s Route 4.

The table compares what a visitor actually gets on each, from the province’s official routes and fees and from the 28 cruises we list, read on 15 November 2026. Bay fees are per person: Ha Long’s as the Ha Long Bay Management Board publishes them, and the Cat Ba bays' as Hai Phong’s rates from 1 August 2024 were reported in the press (VnEconomy), since the resolution text itself was not available; the best-selling cruises list them as included, so check the option you book says the same.

We sorted every cruise on this site by the bay its itinerary names. The pattern is clear: day boats from Hanoi mostly run the classic Ha Long route, and the ships that stay overnight mostly head south into Lan Ha Bay, even when they board at Tuan Chau in Ha Long. The Elite ship with a panoramic pool is the top-rated overnight, 4.9 from more than 3,100 reviews; the best seller on the Ha Long side has nearly 15,000 reviews averaging 4.8. For a Lan Ha day from Hanoi, the Taliya yacht gives about 7 hours on the water. Prices are the lowest on GetYourGuide on 15 November 2026.

Ha Long Bay is Vietnam’s most visited bay: about 3.4 million visits in 2025, 2.2 million of them international (VnEconomy press report, 19 December 2025), and 500 tourist boats registered on the bay at the end of July 2025, 377 of them in regular service (Quang Ninh figures in a Dien dan Doanh nghiep press report). Most of that traffic follows the same afternoon: every one of the seven Ha Long day cruises we list stops at Sung Sot Cave, Luon Cave and Ti Top Island, which are all on the province’s Route 2. The best-selling listing itself says the bay is busiest from June to August and at weekends. The upside is that the route is the one with the bay’s best-known cave and viewpoint, and the boats are timed to it.

Lan Ha Bay sees fewer day boats from Hanoi: three of the ten day cruises from Hanoi on this site go there, against seven on the classic Ha Long route. The overnight ships that sail there anchor in coves such as Ao Ech and Tra Bau, and one 5-star listing describes its anchorage as the quietest area of Lan Ha Bay. Since 1 April 2026, Quang Ninh and Hai Phong license tourist boats on four linked routes between the two bays, all of them overnight cruises rather than day tours (Ministry of Construction, 20 April 2026).

Route 4, the Bai Tu Long side, is the least travelled of the three on our list: one overnight cruise among our 28 products sails it, against twelve that spend the night in Lan Ha Bay. Whichever bay you choose, a weekday outside June to August puts you on the water with the fewest other boats.

Ha Long Bay has the big set pieces. Sung Sot, the Surprise Cave, is the centrepiece of the classic route: about 40 to 60 minutes on foot along lit walkways, with stairs. Ti Top Island has a small beach and a climb to a viewpoint over the bay. Both open at 07:30 and take visitors until 17:30 from 16 April to 31 October and until 17:00 in winter (Ha Long Bay Management Board).

Lan Ha Bay is more intimate. Hai Phong’s description of the heritage site singles out the salt-water lakes and the limestone pinnacles with sheer cliffs along the east and south-east coast of Cat Ba Island, and that is what the boats show you: narrow channels, Dark and Bright Cave entered by kayak or bamboo boat, the Ba Trai Dao islets with small sandy beaches, and the Cai Beo floating fishing village. Cat Ba Island adds Viet Hai village by bike and Trung Trang Cave, about 400 metres long, and from Cat Ba Town a guided half-day hike climbs to Ngu Lam Peak in the national park, 220 metres above the sea, from €24.94 (GetYourGuide, 15 Nov 2026). On a Lan Ha overnight that boards at Tuan Chau, the ship sails through southern Ha Long Bay first, so you see both seascapes on the way.

On Route 4, the Bai Tu Long cruise kayaks around Cap La Island and visits Thien Canh Son Cave and Hon Co beach the next morning; Vung Vieng fishing village is on the same official route. To see Sung Sot as well as Lan Ha on one booking, the 5-star cruise from Hanoi or Ninh Binh offers Sung Sot Cave on day one.

For time in the water, Lan Ha Bay wins. On the Ha Long day route the kayak stop at Luon Cave is about 35 minutes, two people to a kayak, and the swim is at Ti Top beach. On a Lan Ha overnight you usually paddle twice, in the afternoon and again before breakfast at Ao Ech or Dark and Bright Cave, and you can swim from the boat as well as from beaches such as Ba Trai Dao.

If you are staying on Cat Ba, the island’s own boat days are the most water for the money: the full day with biking and kayaking is from €25.67 and rated 4.8 from more than 1,700 reviews, the small-group kayak day is from €29.34, and the kayak and snorkelling tour, with gear provided, is from €31.17 (GetYourGuide, 15 Nov 2026). On the Ha Long route a rowed bamboo boat is the alternative to the kayak, which suits younger children and anyone who would rather not paddle.

Most of our cruises, for every bay, start at Tuan Chau Marina in Ha Long, about 130 km from Hanoi’s Old Quarter by expressway: about 3 hours on most day-cruise shuttles and 3.5 to 4 hours on most overnight ones. Most cruises include or sell the shuttle. The Lan Ha ships from Tuan Chau sail south to Lan Ha within the cruise, so you do not need to reach Cat Ba yourself.

The Cat Ba side means a road to Hai Phong, the Dong Bai to Cai Vieng ferry, which replaced the old Got terminal in March 2024 and runs with seven ferries, and a drive to Ben Beo or Cai Beo harbour. The listings give about 3 to 4 hours from Hanoi to Ben Beo. The Bai Tu Long cruise boards at the Sun World port in Ha Long, as its listing names it.

One day from Hanoi, first visit: Ha Long Bay. Sung Sot Cave and the Ti Top viewpoint are the sights people come for, the boats are timed to them, and the price is lowest, from €35.85. If you would rather have quieter water, the Taliya Lan Ha day cruise is from €51.79 and leaves Hanoi at 06:30.

One night: Lan Ha Bay, on a ship that boards at Tuan Chau. You get the calmer anchorage, two kayak sessions and usually a balcony cabin, from €99.79. Travellers who want a small boat rather than a big ship can start on Cat Ba with a 15-guest limit, from €113.87.

Fewer boats above everything else: the Ha Long and Bai Tu Long overnight, from €126.55, with a US$10 peak-season charge per person from 1 October to 30 April payable on top, as its listing states.

Already on Cat Ba: book a Cat Ba boat day for Lan Ha, from €25.67 (GetYourGuide, 15 Nov 2026).