{
  "response": {
    "Key": "DEN-GB",
    "orig": {
      "code": "DEN",
      "type": "airport",
      "city": "Denver",
      "fullCity": "Denver, Colorado",
      "airport": "Denver Intl Airport"
    },
    "dest": {
      "code": "GB",
      "type": "country",
      "country": "United Kingdom"
    },
    "faq": {
      "q0": {
        "question": "Which cities in United Kingdom can I fly to from Denver?",
        "answer": "From Denver you most often fly into London Heathrow non-stop, then connect on to cities such as Manchester, Edinburgh, or Glasgow. London is the main hub for onward trains and flights within the UK, while Edinburgh and Glasgow are popular for exploring Scotland."
      },
      "q1": {
        "question": "How long is the flight from Denver to United Kingdom?",
        "answer": "From Denver to London, non-stop flights take about 8½ hours eastbound and roughly 9½ hours westbound. One-stop routes to cities such as Manchester or Edinburgh typically range from 11 to 14 hours depending on the connection."
      },
      "q2": {
        "question": "Are there direct flights from Denver to United Kingdom?",
        "answer": "Yes, a non-stop flight from Denver to London is available on British Airways and United Airlines, taking around 8½ to 9 hours eastbound. If you are flying to other UK cities or your dates lack non-stops, common one-stop routes connect through London or other European hubs such as Dublin or Reykjavik, with total travel times typically between 10 and 13 hours."
      },
      "q3": {
        "question": "Which airlines fly from Denver to United Kingdom?",
        "answer": "From Denver to the UK, British Airways flies nonstop. One-stop options include United, American, Delta, Lufthansa, and Icelandair via their hubs."
      },
      "q4": {
        "question": "When is the cheapest time to fly from Denver to United Kingdom?",
        "answer": "The cheapest months to fly from Denver to the United Kingdom are typically October, November, and September, while peak summer (June–July) and the December holidays run noticeably higher. Booking about 10 to 13 weeks ahead tends to yield the best fares, and departing on a Tuesday or in the morning or afternoon can offer lower prices compared to weekend or late-night 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. 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 Denver to United Kingdom?",
        "answer": "For flights from Denver to the United Kingdom, the optimal booking window is about 10 to 13 weeks before departure, when average fares dip to around $920.",
        "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 United Kingdom?",
        "answer": "London is the main gateway and a top draw for history and culture. Edinburgh offers medieval charm and festivals. Manchester and Liverpool attract music and sports fans. Bath and Oxford make easy day trips by train."
      },
      "q8": {
        "question": "Which airports in United Kingdom are best to fly into from Denver?",
        "answer": "From Denver to the United Kingdom, London Heathrow offers the most long-haul options and excellent onward train connections across the country. London Gatwick also receives flights and provides rail links to London and the south coast. If Scotland is your focus, Edinburgh is a convenient gateway with good regional links."
      },
      "q12": {
        "question": "When is the best time of year to visit United Kingdom?",
        "answer": "For the United Kingdom, May to June and September to early October typically offer mild weather and fewer tourists than July and August. London and Edinburgh are notably busy and pricey in summer, while spring and autumn bring more moderate crowds and fares."
      },
      "q13": {
        "question": "How do I get to Denver Intl Airport from the city center?",
        "answer": "From downtown Denver, the A Line commuter train operated by RTD is the fastest and most popular option, running directly from Denver Union Station to the airport transit center in about 37 minutes. Public buses, including the SkyRide service, offer a lower-cost alternative with slightly longer travel times. Ride-share services like Uber and Lyft, as well as taxis, provide door-to-door convenience at a higher cost, while driving yourself is possible with various on-site parking options ranging from economy to premium. All ground transportation options converge at the Jeppesen Terminal, with the train and buses arriving at the adjacent transit center.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://www.flydenver.com/parking-and-transportation/to-and-from/airport-transit-center/",
            "title": "Airport Transit Center | Denver International Airport",
            "time_published": "2026-02-24T17:09:34Z"
          },
          {
            "url": "https://flydenver.com/connections/",
            "title": "Connections | Denver International Airport",
            "favicon": "https://flydenver.com/apple-touch-icon.png",
            "time_published": "2023-09-14T15:33:21Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Automated_Guideway_Transit_System_(Denver_International_Airport)",
            "title": "Automated Guideway Transit System (Denver International Airport)",
            "time_published": "2026-06-01T08:54:40Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Denver%20International%20Airport",
            "title": "Denver International Airport",
            "time_published": "2026-04-30T15:08:23Z"
          },
          {
            "url": "https://www.faa.gov/?action=searchForAirport&airportcode=PSR",
            "title": "Federal Aviation Administration",
            "favicon": "https://www.faa.gov/themes/custom/faa/favicon.png",
            "time_published": "2026-07-17T12:00:00Z"
          }
        ],
        "methodology": "Airport details are drawn from the sources listed with this answer, primarily the airport operator's official website along with airline, lounge-operator and transit-authority pages, collected by our research process and refreshed periodically. Only information found in those sources is used; where a source does not cover a topic it is left out rather than guessed."
      }
    }
  }
}