Dates are flexible. This day-by-day plan is provisional until you choose exact travel dates.
Because this visit is especially important and may be emotional, make the 9/11 Memorial and 9/11 Memorial Museum the fixed priorities rather than trying to tour all of Manhattan. Start at the memorial pools and allow around 1–1½ hours to walk both sides, read names, and pause without watching the clock. The outdoor memorial is free, but expect security screening and crowds; visiting earlier generally gives you a calmer start.
Reserve a timed ticket for the 9/11 Memorial Museum well in advance through its official website. Plan on 3½–4½ hours inside rather than the shorter standard visit, with time for the historical exhibits, personal stories, and moments away from the displays if needed. Admission prices and opening hours can change by year, so for a future trip use the official calendar when tickets are released. Do not schedule another major attraction immediately afterward; the museum may feel much more intense than its visit length suggests.
After leaving the museum, take a break at the Oculus—the building is free to enter, and its open concourse provides an easy place to sit, use the restroom, or gather yourself. Walk a few minutes toward Fraunces Tavern for a proper meal, budgeting roughly $25–$45 per person before drinks and tip. If you would prefer something lighter or less formal, casual food in the surrounding Financial District will usually be less expensive, around $15–$25 per person.
Only continue to Battery Park and the Staten Island Ferry if you still feel comfortable and have enough time. The ferry is free and offers good views of the harbor and Statue of Liberty, but boarding queues and the round trip take about 1½–2 hours. It is a pleasant way to end the day, not an obligation; skipping it leaves more room to sit quietly or return to a meaningful part of the memorial complex.
For a future San José-to-New York trip, budget for at least one overnight stay in or near Lower Manhattan; flying across the country and attempting the memorial, museum, and an airport return on the same day would be exhausting and unreliable. Round-trip economy airfare may commonly fall around $300–$800 or more, while accommodation can easily cost more than the sightseeing. From JFK, public transportation using AirTrain and the subway may cost roughly $3–$20 depending on the route; a car or rideshare is easier with luggage but can cost substantially more.
A realistic New York sightseeing estimate is about $24–$36 for museum admission, $15–$45 for food, and $3–$20 for local transit, excluding lodging and flights. Check the museum’s current ticket rules, hours, and any special memorial-site guidance close to the eventual trip, and build in unscheduled time rather than filling every hour.
No packing list attached yet.