{
  "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. One-stop options through Asian hubs like Seoul, Tokyo, or Taipei also serve Hanoi. Ho Chi Minh City is the southern gateway for the Mekong Delta, while Hanoi is the northern hub for Ha Long Bay and Sapa. Travelers often fly into one and out of the other to avoid backtracking, with domestic flights or trains connecting the two."
      },
      "q1": {
        "question": "How long is the flight from San Francisco to Vietnam?",
        "answer": "Non-stop flights from San Francisco to Ho Chi Minh City take around 15 hours 30 minutes eastbound and roughly 14 hours westbound. One-stop journeys to Hanoi or Ho Chi Minh City typically range from 18 to 22 hours 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 and United Airlines operate direct flights to Tan Son Nhat International Airport in Ho Chi Minh City, and Vietnam Airlines also flies non-stop to Noi Bai International Airport in Hanoi. Flight time is roughly 14 to 15 hours westbound. If you do not fly non-stop, one-stop routings often connect through Tokyo, Seoul, Taipei or Hong Kong, with total travel times of 18 to 24 hours or more."
      },
      "q3": {
        "question": "Which airlines fly from San Francisco to Vietnam?",
        "answer": "Nonstop: Vietnam Airlines, United. One-stop: Cathay Pacific, EVA Air, Korean Air, Asiana, Japan Airlines, China Airlines, Singapore 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 April, September, and March, while June and December are the most expensive, so avoid peak summer and the winter holidays if you can. For the best fare, book about 6 to 9 weeks ahead — waiting until the last minute drives prices up sharply. Although specific day-of-week data isn't available for this route, midweek departures and off-peak times of day generally offer lower fares than weekend or peak-hour flights.",
        "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. 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 optimal booking window is about 6 to 9 weeks before departure, when fares average around $938 and can dip as low as $926.",
        "methodology": "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."
      },
      "q6": {
        "question": "What are the most popular cities to visit in Vietnam?",
        "answer": "In Vietnam, most travelers start in Hanoi for history and street food, then visit Ho Chi Minh City for urban energy, Hoi An for its lantern-lit old town, Hue for imperial sites, and Ha Long Bay for its limestone karsts. Flights from SFO typically arrive in Hanoi or Ho Chi Minh City, with easy domestic connections to Da Nang (for Hoi An and Hue) and short flights or drives to Ha Long Bay."
      },
      "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 a single-entry e-visa online, valid for up to 90 days. Rules can change, so verify the latest requirements through the official Vietnam 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, you will almost always land at either Hanoi Noi Bai or Ho Chi Minh City Tan Son Nhat. Hanoi is better for Ha Long Bay and northern mountains, while Ho Chi Minh City is the main gateway for the Mekong Delta and beach resorts like Phu Quoc. Da Nang is ideal for central Vietnam and Hoi An but requires a connection from a larger Asian hub since no nonstop flights from the U.S. serve it."
      },
      "q12": {
        "question": "When is the best time of year to visit Vietnam?",
        "answer": "For Vietnam, February to April and September to November offer generally dry, comfortable weather across Hanoi and Ho Chi Minh City, avoiding the peak summer heat and rain."
      }
    }
  }
}