{
  "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 or connect in Asian hubs to Hanoi and Da Nang. Ho Chi Minh City is the southern gateway, while Hanoi serves the north and Ha Long Bay. Da Nang is central for Hoi An and Hue."
      },
      "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 roughly 15 to 16 hours, while the return westbound leg can be about an hour longer. One-stop routes to Hanoi or Ho Chi Minh City commonly range from 18 to 22 hours depending on the layover."
      },
      "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 a direct route between San Francisco International Airport (SFO) and Tan Son Nhat International Airport (SGN) in Ho Chi Minh City. The flight time is approximately 15 to 16 hours westbound and slightly shorter eastbound. If you are flying to Hanoi, a connection in Ho Chi Minh City or another Asian hub is typical."
      },
      "q3": {
        "question": "Which airlines fly from San Francisco to Vietnam?",
        "answer": "Vietnam Airlines flies non-stop. 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": "September, October, and April are the cheapest months to fly from San Francisco to Vietnam, while peak summer and the December holiday season are the most expensive. Booking about 6 to 9 weeks ahead tends to yield the best fares. Midday departures on Mondays or Tuesdays are typically cheapest, with Saturdays and Fridays running highest.",
        "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. 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."
      },
      "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 $964.",
        "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 visitors start in Hanoi or Ho Chi Minh City, both major flight gateways. Hanoi offers old‑quarter charm and access to Ha Long Bay. Ho Chi Minh City buzzes with street food and history. Central Vietnam’s Hoi An and Hue draw travelers for ancient towns and imperial sites, reachable via short flights or trains from either hub."
      },
      "q7": {
        "question": "Do I need a visa to travel from San Francisco to Vietnam?",
        "answer": "For United States citizens traveling from San Francisco to Vietnam, a visa is required for a short tourist visit. The eVisa is the accepted way to obtain it, applied for online before travel.\n\nThis is general guidance to help you plan, not official immigration advice — entry rules can change and can depend on your nationality and circumstances, so please confirm the current requirements with the relevant embassy or official government source before you travel.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://en.wikipedia.org/wiki/Visa_policy_of_Vietnam",
            "title": "Visa policy of Vietnam",
            "favicon": "https://en.wikipedia.org/static/favicon/wikipedia.ico"
          },
          {
            "url": "https://www.gov.uk/foreign-travel-advice/vietnam/entry-requirements",
            "title": "Vietnam entry requirements — GOV.UK",
            "favicon": "https://www.gov.uk/favicon.ico"
          }
        ],
        "preopenedReferences": true,
        "stageOnly": true
      },
      "q8": {
        "question": "Which airports in Vietnam are best to fly into from San Francisco?",
        "answer": "From San Francisco to Vietnam, the best airports to fly into are Tan Son Nhat in Ho Chi Minh City and Noi Bai in Hanoi. Ho Chi Minh City is the busiest hub with more long-haul options and serves as a gateway to the Mekong Delta and southern beaches. Hanoi is ideal for exploring the north, including Ha Long Bay and Sapa, and offers good train connections to central Vietnam. Da Nang is a good choice for direct access to Hoi An and central coast resorts, though it has fewer direct flights from the U.S."
      },
      "q12": {
        "question": "When is the best time of year to visit Vietnam?",
        "answer": "Vietnam's climate varies by region, but generally November to April brings drier conditions to many popular areas. Spring and autumn offer milder weather and fewer tourists compared with the busy, pricier summer months."
      },
      "q13": {
        "question": "How do I get to San Francisco Intl Airport from the city center?",
        "answer": "From downtown San Francisco, BART rapid rail is the fastest and most popular option, running directly from the city center to the airport's International Terminal with no traffic delays; SamTrans bus routes also serve SFO but are slower and less frequent. Ride-share services like Lyft and Uber, along with taxis, offer door-to-door convenience at a higher cost and can be slower during peak traffic. Driving yourself is possible with on-site parking garages and a cell phone waiting lot, though parking fees add to the trip cost and traffic can be unpredictable.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://flysfo.com/passengers/ground-transportation/public-transit",
            "title": "Public Transit | San Francisco International Airport",
            "favicon": "https://flysfo.com/themes/custom/blueskies/favicon.ico",
            "time_published": "2026-08-17T20:51:53Z"
          },
          {
            "url": "https://flysfo.com/passengers/ground-transportation",
            "title": "Ground Transportation | San Francisco International Airport",
            "favicon": "https://flysfo.com/themes/custom/blueskies/favicon.ico",
            "time_published": "2026-08-17T22:27:43Z"
          },
          {
            "url": "https://www.flysfo.com/passengers/ground-transportation/public-transit/ride-bart",
            "title": "BART | San Francisco International Airport",
            "favicon": "https://www.flysfo.com/themes/custom/blueskies/favicon.ico",
            "time_published": "2025-06-26T22:28:56Z"
          },
          {
            "url": "https://www.flysfo.com/",
            "title": "San Francisco International Airport | SFO Official Site",
            "favicon": "https://www.flysfo.com/themes/custom/blueskies/favicon.ico"
          },
          {
            "url": "https://flysfo.com/passengers/ground-transportation/getting-around-sfo",
            "title": "Getting Around SFO | San Francisco International Airport",
            "favicon": "https://flysfo.com/themes/custom/blueskies/favicon.ico",
            "time_published": "2026-08-11T21:48:22Z"
          }
        ]
      }
    }
  }
}