{
  "response": {
    "Key": "CHI-SFO",
    "orig": {
      "code": "CHI",
      "type": "airport",
      "city": "Chicago",
      "fullCity": "Chicago, Illinois",
      "airport": "Dupage County"
    },
    "dest": {
      "code": "SFO",
      "type": "airport",
      "city": "San Francisco",
      "fullCity": "San Francisco, California",
      "airport": "San Francisco Intl Airport"
    },
    "faq": {
      "q0": {
        "question": "What is the typical flight duration from Chicago to San Francisco?",
        "answer": "A nonstop flight from Chicago (O'Hare or Midway) to San Francisco typically takes about 4 hours 30 minutes westbound, while the return eastbound is shorter at around 4 hours. With one stop, total travel time usually ranges from 6 to 8 hours depending on the layover city."
      },
      "q1": {
        "question": "Are there any direct flights from Chicago to San Francisco?",
        "answer": "Yes, there are plenty of nonstop flights from Chicago to San Francisco. United, American, Southwest, and Alaska all fly the route nonstop — United leads with about 193 weekly flights from O'Hare, followed by American with 152, Southwest with 30 from Midway, and Alaska with 14 from O'Hare, all operating daily.",
        "methodology": "Airlines and weekly frequencies are compiled from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a median fare is shown for a carrier, it reflects the real fares Priceline users found on this route in the last 72 hours.",
        "toolsUsed": [
          "route_airlines"
        ]
      },
      "q3": {
        "question": "What are the ground transportation options in San Francisco?",
        "answer": "From SFO, BART rapid rail is the fastest way to downtown San Francisco, with the station in the International Terminal connected by AirTrain. Ride-share pickups (Lyft, Uber) are on Level 5 of the Domestic Garage, and taxis are at the arrivals center islands. Waymo autonomous rides are available at the Rental Car Center. Rental cars are centralized and reachable via the AirTrain Blue Line, while many hotels offer complimentary shuttles. BART is the most-used option for its speed and direct access to the city.",
        "toolsUsed": [],
        "references": [
          {
            "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": "2026-04-08T21:19:40Z"
          },
          {
            "url": "https://flysfo.com/de/node/10188",
            "title": "Ground Transportation | San Francisco International Airport",
            "favicon": "https://flysfo.com/themes/custom/blueskies/favicon.ico",
            "time_published": "2026-04-08T21:19:40Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/SFO",
            "title": "San Francisco International Airport",
            "time_published": "2026-04-27T05:13:36Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/San_Francisco_International_Airport",
            "title": "San Francisco International Airport",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-07-18T07:52:09Z"
          },
          {
            "url": "https://www.flysfo.com/pt-br",
            "title": "Home Page | San Francisco International Airport",
            "time_published": "2026-01-01T00:00:00Z"
          }
        ]
      },
      "q4": {
        "question": "When is the cheapest time to fly from Chicago to San Francisco?",
        "answer": "The cheapest months to fly from Chicago to San Francisco are October, September, and December, with average fares around $325–$334, while the most expensive months are June, July, and May, averaging $404–$445.",
        "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.",
        "toolsUsed": [
          "seasonal_prices"
        ]
      },
      "q5": {
        "question": "How far in advance should I book tickets from Chicago to San Francisco?",
        "answer": "For flights from Chicago to San Francisco, the best fares are typically found when booking 7 to 10 weeks in advance, with an average price around $245. The absolute lowest fare appears about 110 days out at $221, while last-minute bookings can cost nearly $400. During peak summer and holiday periods, demand can push prices higher, so aiming for the early end of that window or slightly earlier is wise.",
        "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.",
        "toolsUsed": [
          "booking_timing"
        ]
      },
      "q6": {
        "question": "Are overnight (red‑eye) flights available from Chicago to San Francisco?",
        "answer": "Yes, overnight red-eye flights are available from Chicago to San Francisco. United operates up to 22 weekly nonstop red-eyes from O'Hare departing around 9:13–9:40 PM, and American runs a daily red-eye at 9:00 PM. These flights arrive in San Francisco the same night, typically just before midnight.",
        "methodology": "Red-eye flights are identified from scheduled local departure and arrival times in our flight-schedule database — built from published airline timetables and official schedule data, including U.S. Department of Transportation records for domestic routes — flagging services that depart late at night and arrive the following morning; for connecting itineraries the red-eye is based on the timing of the overnight long-haul leg.",
        "toolsUsed": [
          "redeye_flights"
        ]
      },
      "q7": {
        "question": "Which airlines usually operate this route from Chicago to San Francisco?",
        "answer": "United, American, Southwest, and Alaska operate nonstop from Chicago to San Francisco. United flies the most with about 193 weekly flights from O'Hare, followed by American with 152 weekly flights, also from O'Hare. Southwest offers around 30 weekly flights from Midway, and Alaska adds about 14 weekly flights from O'Hare. Median fares are not available in the current data.",
        "methodology": "Airlines and weekly frequencies are compiled from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a median fare is shown for a carrier, it reflects the real fares Priceline users found on this route in the last 72 hours.",
        "toolsUsed": [
          "route_airlines"
        ]
      },
      "q9": {
        "question": "How reliable are on‑time departures on this route from Chicago to San Francisco?",
        "answer": "On-time performance is generally dependable, though afternoon thunderstorms can cause delays. Early morning flights, particularly from O'Hare on United, tend to depart more reliably."
      },
      "q10": {
        "question": "Which months have the best weather for traveling to San Francisco?",
        "answer": "September and October offer the warmest, sunniest weather in San Francisco with fewer tourists than summer."
      },
      "q11": {
        "question": "What documents should I bring with me to the airport when flying from Chicago to San Francisco?",
        "answer": "For this domestic flight, bring a Real ID or passport, ensure your ID matches your ticket, and carry a payment method for baggage; no visa or proof of onward travel is needed."
      },
      "q12": {
        "question": "Which airport should I use in San Francisco?",
        "answer": "San Francisco International is the primary airport and is located about 13 miles south of downtown. It is a major hub for United Airlines and serves most domestic and international carriers."
      },
      "q14": {
        "question": "Are there hotels or sleeping facilities at San Francisco airport?",
        "answer": "San Francisco International Airport has the Grand Hyatt at SFO, an on-site hotel connected to the International Terminal via the AirTrain, requiring no shuttle. The airport also offers hourly nap rooms and showers in the International Terminal for a quick rest. Several nearby hotels, including the San Francisco Airport Marriott Waterfront and The Westin San Francisco Airport, provide complimentary shuttle service to and from the terminals.",
        "toolsUsed": [],
        "references": [
          {
            "url": "https://www.sleepinginairports.net/guides/san-francisco-airport-guide.htm",
            "title": "San Francisco Airport Guide (SFO) - Sleeping in Airports",
            "favicon": "https://www.sleepinginairports.net/nitropack_static/oBWrHkPujHTPIaVWqdDSDhClXUyrYhhb/assets/images/optimized/rev-b853180/www.sleepinginairports.net/wp-content/uploads/2018/09/cropped-sia-logo-180x180.png",
            "time_published": "2018-10-02T00:00:42Z"
          },
          {
            "url": "https://www.marriott.com/en-us/hotels/sfobg-san-francisco-airport-marriott-waterfront/overview/?EM=DNM_SANFRANCISCOAIRPORTMARRIOTT.COM",
            "title": "SFO Airport Hotel | San Francisco Airport Marriott Waterfront",
            "time_published": "2025-02-19T00:00:00Z"
          },
          {
            "url": "https://www.marriott.com/en-us/hotels/sfowi-the-westin-san-francisco-airport/overview/?scid=f2ae0541-1279-4f24-b197-a979c79310b0",
            "title": "The Westin San Francisco Airport (Official Site) - SFO Hotel",
            "time_published": "2025-02-19T00:00:00Z"
          },
          {
            "url": "https://www.flysfo.com/passengers/shop-dine-relax?content_type=things_to_do&location=3&sort_by=random",
            "title": "Shop/Dine/Relax | San Francisco International Airport",
            "time_published": "2025-10-22T23:13:26Z"
          },
          {
            "url": "https://www.flysfo.com/passengers/shop-dine-relax?content_type=All&gate_area=All&https://www.flysfo.com/passengers/shop-dine-relax?https://www_flysfo_com/passengers/shop-dine-relax?https://www_flysfo_com/passengers/shop-dine-relax?location=2&location=1659&security=All&service_tags=All&sort_by=random",
            "title": "Shop/Dine/Relax | San Francisco International Airport",
            "time_published": "2025-10-22T23:13:26Z"
          },
          {
            "url": "http://www.flysfo.com/de/node/14691",
            "title": "Press Releases | San Francisco International Airport",
            "time_published": "2025-07-09T15:54:20Z"
          }
        ]
      },
      "q15": {
        "question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at San Francisco Intl Airport?",
        "answer": "San Francisco International Airport offers currency exchange offices, a reflection room that includes a prayer room, and free Wi‑Fi. Currency exchange services are available in the terminals, and the reflection room provides a quiet space for meditation and prayer. Free Wi‑Fi is accessible throughout the airport. For specific terminal locations, you can check the airport's interactive map or information desks.",
        "toolsUsed": [],
        "references": [
          {
            "url": "https://flysfo.com/passengers/shop-dine-relax",
            "title": "Shop/Dine/Relax | San Francisco International Airport",
            "time_published": "2026-03-12T16:15:43Z"
          },
          {
            "url": "http://www.flysfo.com/welcome-terminal-3",
            "title": "Welcome to Terminal 3 | San Francisco International Airport",
            "favicon": "http://www.flysfo.com/themes/custom/blueskies/favicon.ico",
            "time_published": "2026-05-08T21:34:33Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/San_Francisco_International_Airport",
            "title": "San Francisco International Airport",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-07-18T07:52:09Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/San%20Francisco%20International%20Airport",
            "title": "San Francisco International Airport",
            "time_published": "2026-04-28T21:12:40Z"
          },
          {
            "url": "https://flysfo.com/passengers/services-amenities",
            "title": "Services & Amenities | San Francisco International Airport",
            "favicon": "https://flysfo.com/themes/custom/blueskies/favicon.ico",
            "time_published": "2026-03-03T22:32:54Z"
          }
        ]
      },
      "q17": {
        "question": "What aircraft are typically used on flights from Chicago to San Francisco?",
        "answer": "Nonstop flights between Chicago and San Francisco are most often operated with Boeing 757-300s, Airbus A321neos, and Boeing 737 MAX 8s, with Boeing 737-900s, 737-800s, Airbus A321-100s, and the occasional Boeing 777 also appearing. The exact aircraft varies by day and by airline — United flies a mix of 757-300s, A321neos, 737-900s, and 777s, while Southwest uses 737 MAX 8s and American operates A321-100s and 737-800s. On connecting itineraries, the long leg is typically a 737-800, 737 MAX 8, or A321-100, often via Denver, Dallas/Fort Worth, or Las Vegas. Wi-Fi and seatback entertainment are widely available on these routes, though the specifics depend on the airline and the individual aircraft.",
        "methodology": "Aircraft types are taken from the equipment each operating carrier schedules on this route, drawn from published airline timetables and airline equipment schedules in our flight-schedule database. They describe typical scheduled aircraft and can vary with seasonal or day-of-week assignments and last-minute equipment swaps.",
        "toolsUsed": [
          "route_aircraft"
        ]
      },
      "q18": {
        "question": "Which airline alliances serve flights from Chicago to San Francisco?",
        "answer": "United Airlines (Star Alliance) and American Airlines (both Oneworld) offer nonstop flights from Chicago O'Hare to San Francisco, while Southwest Airlines (no alliance) serves the route from Chicago Midway. Alaska Airlines, also Oneworld, operates a handful of nonstops from O'Hare as well.",
        "methodology": "Airlines and weekly frequencies are compiled from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a median fare is shown for a carrier, it reflects the real fares Priceline users found on this route in the last 72 hours.",
        "toolsUsed": [
          "route_airlines"
        ]
      },
      "q21": {
        "question": "What is the baggage allowance on this route from Chicago to San Francisco?",
        "answer": "Baggage allowances on Chicago–San Francisco flights depend on the airline and fare class. Basic economy tickets often restrict carry‑ons to a personal item and charge for checked bags, while standard economy typically includes a carry‑on and charges for checked luggage. Premium fares usually include both carry‑on and checked bags."
      },
      "q22": {
        "question": "What cabin and seat options are typical from Chicago to San Francisco?",
        "answer": "Chicago to San Francisco flights typically offer Economy, often Economy Plus or extra‑legroom seats, and recliner‑style First or Business class. Flat‑bed Business is rare on this domestic route, and Premium Economy is not standard."
      },
      "q23": {
        "question": "Are same‑day changes or standby possible on this route?",
        "answer": "Policies vary by airline and fare, with flexible and higher-cabin tickets often permitting same‑day changes or standby, while Basic Economy typically excludes these options."
      }
    }
  }
}