{
  "response": {
    "Key": "SFO-VN",
    "orig": {
      "code": "SFO",
      "type": "airport",
      "city": "San Francisco",
      "fullCity": "San Francisco, California",
      "airport": "San Francisco Intl Airport"
    },
    "dest": {
      "code": "VN",
      "type": "country",
      "country": "Vietnam"
    },
    "faq": {
      "q0": {
        "question": "Which cities in Vietnam can I fly to from San Francisco?",
        "answer": "From San Francisco you can fly non-stop to Ho Chi Minh City on Vietnam Airlines. One-stop connections via Taipei, Seoul or Tokyo serve both Ho Chi Minh City and Hanoi. Choose Ho Chi Minh City for southern attractions and the Mekong Delta, or Hanoi for northern highlights like Ha Long Bay."
      },
      "q1": {
        "question": "How long is the flight from San Francisco to Vietnam?",
        "answer": "From San Francisco, non-stop flights to Ho Chi Minh City take about 15½ to 16 hours westbound and roughly 14 hours eastbound on the return. One-stop itineraries to Hanoi or Ho Chi Minh City commonly range from 18 to 22 hours total depending on the connection."
      },
      "q2": {
        "question": "Are there direct flights from San Francisco to Vietnam?",
        "answer": "Yes, there are non-stop flights from San Francisco to Vietnam. Vietnam Airlines operates direct service to Ho Chi Minh City, with flight times around 16 hours eastbound and slightly longer westbound. If flying to Hanoi or on dates without non-stops, common one-stop routings connect through Seoul, Tokyo, or Taipei, with total travel times typically 18 to 22 hours."
      },
      "q3": {
        "question": "Which airlines fly from San Francisco to Vietnam?",
        "answer": "Vietnam Airlines flies non-stop to Ho Chi Minh City. One-stop options include Cathay Pacific, EVA Air, China Airlines, Korean Air, and Japan Airlines via their hubs."
      },
      "q4": {
        "question": "When is the cheapest time to fly from San Francisco to Vietnam?",
        "answer": "The cheapest months to fly from San Francisco to Vietnam are September, October, and April, with late summer and early fall offering the lowest fares. Midweek departures — especially Tuesday — tend to be cheaper than weekend flights, and midday departures often have the best prices. Booking about 6 to 9 weeks ahead typically yields the lowest fares, while peak summer and the December holiday season are considerably more expensive.",
        "methodology": "This 'good deal' estimate shows a representative best price for each departure date across roughly a 12-month window (about 3 months back and 9 months forward). It is built from real flight prices found by Priceline users searching this route, accumulated into a price history for each departure date. Rather than weighting all of that history equally, we apply exponential time decay so recent prices dominate — a price seen yesterday counts almost in full, one from about a month ago roughly a third, and prices from a few months back very little — giving a figure that tracks today's market instead of a stale long-run average. Clear price outliers are removed before any calculation, departure dates with no observations are filled in from nearby dates, and the resulting curve is lightly smoothed so it reads as a clean seasonal trend rather than day-to-day noise. The cheapest day of the week and time of day to depart are drawn from the same large sample of real fares Priceline users found on this route in the last 72 hours, grouped by the day of the week and by the time-of-day window of the outbound departure, with the lowest and average price reported for each. This booking-window guidance is built from the same real flight prices found by Priceline users searching this route, re-grouped by how many days before departure each price was seen (from the departure day out to about 180 days ahead) across the route's price history. At each booking lead time we report the 25th-percentile price — the cheaper end of what travelers were quoted, rather than the rock-bottom minimum (which can be a fluke) or the average (which is pulled up by expensive last-minute fares). The buy-or-wait advice then applies a risk premium that grows as departure approaches, since seat availability shrinks and prices become less predictable; using that adjusted curve we flag windows where waiting is likely to save a meaningful amount (at least $20 or 5%) versus windows where booking now is the better call. Isolated single-day recommendations are filtered out, so the advice only reflects a window that holds for several days in a row."
      },
      "q5": {
        "question": "How far in advance should I book flights from San Francisco to Vietnam?",
        "answer": "For flights from San Francisco to Vietnam, the best fares typically appear when booking 6 to 10 weeks ahead of departure, though summer and holiday travel often reward booking 10 to 14 weeks out."
      },
      "q6": {
        "question": "What are the most popular cities to visit in Vietnam?",
        "answer": "In Vietnam, visitors often start in Hanoi for history and street food, then continue to Ha Long Bay, Hue for imperial sites, Hoi An for its lantern-lit old town, and Ho Chi Minh City for its dynamic energy and nearby Mekong Delta."
      },
      "q7": {
        "question": "Do I need a visa to travel from San Francisco to Vietnam?",
        "answer": "U.S. citizens need a visa to enter Vietnam for tourism, but you can apply for an e-visa online for stays up to 90 days. Visa rules can change, so verify current requirements with the Vietnamese embassy or official e-visa portal before your trip."
      },
      "q8": {
        "question": "Which airports in Vietnam are best to fly into from San Francisco?",
        "answer": "From San Francisco to Vietnam, Tan Son Nhat in Ho Chi Minh City and Noi Bai in Hanoi are your primary long-haul gateways, with Ho Chi Minh City offering more nonstop options and better connections to southern beach resorts like Phu Quoc. Hanoi is ideal if your focus is the north, with easy access to Ha Long Bay and Sapa via trains and buses. Da Nang works well for central coast destinations but usually requires a connection in Asia."
      },
      "q12": {
        "question": "When is the best time of year to visit Vietnam?",
        "answer": "Vietnam's best weather varies by region, but overall October to April offers drier, milder conditions. Summer (May to September) is hot, humid and rainy in many areas, with higher domestic travel demand."
      }
    }
  }
}