Hanoi is more beautiful than Ho Chi Minh City and considerably harder work, and the difficulty is concentrated exactly where you want to stay.
The Old Quarter is not stroller or wheelchair terrain. The pavements are occupied by parked motorbikes, plastic stools, charcoal grills and stacked merchandise, so pedestrians walk in the road; kerbs are high, uneven, and drop away without warning. Lanes are too narrow for two people abreast when a delivery bike comes through. If someone in your group uses a walker or a chair, base yourselves in the French Quarter south of the lake or in Tay Ho instead, where the pavements are wide and continuous, and go into the Old Quarter by taxi for a couple of hours at a time rather than living in it.
Old Quarter hotels compound this. The buildings are tube houses β six storeys on a tiny footprint β and 'lift' can mean a cabin that fits one person and a small bag, reached by several steps up from the street. Ask two specific questions before booking: is there a lift, and how many steps are there between the pavement and it.
The metro won't rescue you. Both open lines β 2A from Cat Linh out to Ha Dong, running since 2021, and the elevated section of Line 3 between Nhon and Cau Giay, open since August 2024 β are clean, air-conditioned and new enough to have lifts and escalators, though check on the day rather than assuming. Neither goes anywhere near the Old Quarter or Hoan Kiem. Line 3's underground extension in toward Hanoi Railway Station is still under construction and is expected to open in 2027. Ticketing has gone digital: physical single-journey cards were withdrawn on Line 2A in late 2025 and Line 3's tokens were replaced by QR tickets in early 2026, so it's a QR ticket from the counter, a wallet scan, or a contactless card tapped at the gate. Realistically you will walk, and use Grab, Be or Xanh SM for everything else.
Weather is the thing GTA travellers get wrong. Hanoi has four real seasons, unlike the south. December to February brings the northeast monsoon: mid-teens Celsius, grey, and a penetrating damp that feels colder than it reads. Old Quarter hotels are built to shed heat, not hold it, and often 'heat' a room with a single reverse-cycle air conditioner mounted near the ceiling. Bring a proper jacket and layers for a parent who feels the cold. May through September is hot, very humid and wet. And Hanoi's air quality is frequently poor through the cool dry months from roughly November to March β the UK FCDO lists air pollution among Vietnam's health risks, and Hanoi in winter is where you will actually notice it. If anyone in your group has asthma or COPD, take it seriously and pack the inhaler in the day bag, not the suitcase.
On the sights: the Temple of Literature and the Imperial Citadel are the two easy ones β flat courtyards, gravel and paving, benches, shade. The Ba Dinh complex means a long outdoor queue in the open sun, no phones, and no stopping once you're moving inside the Mausoleum; wheelchairs are generally accommodated but ask the guards at the entrance rather than joining the main line. The distances between the Palace grounds, the stilt house and the museum are longer than they look on a map. Ngoc Son Temple involves a step up onto the bridge and a few more inside.
Day trips: getting into a boat is the pinch point. Ha Long jetties involve a step down onto a moving deck, often without a handrail and often with a crew member simply grabbing your arm. Ninh Binh's rowing boats sit low and flat, which makes them easier to board but means a couple of hours sitting on a hard bench close to the water with no shade and no way to get out early β take a hat and think about whether your parent will be comfortable for that long.
And the journey: no nonstop from Pearson, so twenty to twenty-four hours with one Asian connection. Noi Bai is about thirty-five kilometres northeast of the centre with no rail link of any kind β ignore anything you read about an airport metro, it does not exist. Pre-arrange a hotel car, or use the orange airport bus, route 86, which runs from both terminals into the Old Quarter and on to Hanoi Railway Station.