{
  "response": {
    "Key": "DFW-LIS",
    "orig": {
      "code": "DFW",
      "type": "airport",
      "city": "Dallas",
      "fullCity": "Dallas, Texas",
      "airport": "Dallas Fort Worth Intl Airport"
    },
    "dest": {
      "code": "LIS",
      "type": "airport",
      "city": "Lisbon",
      "fullCity": "Lisbon, Portugal",
      "airport": "Humberto Delgado Airport"
    },
    "faq": {
      "q0": {
        "question": "What is the typical flight duration from Dallas to Lisbon?",
        "answer": "A nonstop flight from Dallas (DFW) to Lisbon (LIS) typically takes about 9 hours 30 minutes. With one stop, depending on the connection city, total travel time often ranges from 12 to 15 hours. The return flight from Lisbon to Dallas is usually about 10 hours 30 minutes nonstop due to prevailing winds."
      },
      "q1": {
        "question": "Are there any direct flights from Dallas to Lisbon?",
        "answer": "There are no nonstop flights from Dallas (DFW) to Lisbon (LIS). The shortest one-stop routings connect through the US East Coast or London, with American Airlines via Philadelphia or London Heathrow taking roughly 11 to 12.5 hours total. A typical itinerary via Philadelphia runs about 10 hours 40 minutes gate-to-gate, while connections through London Heathrow add about an hour.",
        "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. Carrier service and weekly frequencies are summarized from our flight-schedule database, which draws on published airline timetables, U.S. government schedule data, and observed operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). Where available, on-time and cancellation rates come from the U.S. Bureau of Transportation Statistics (BTS) Airline On-Time Performance dataset, and typical fares from the U.S. DOT Airline Origin and Destination Survey (DB1B), a quarterly 10% sample of tickets sold.",
        "toolsUsed": [
          "route_airlines",
          "flight_schedule"
        ]
      },
      "q2": {
        "question": "Are there visa requirements to travel from Dallas to Lisbon?",
        "answer": "Yes — visa requirements depend on your citizenship. For U.S. citizens traveling from Dallas to Lisbon, no visa is needed for stays up to 90 days within any 180-day period in the Schengen Area, but starting mid-2025 you will need to apply for ETIAS authorization before travel. For Portuguese citizens and other non-U.S. nationals flying from Lisbon to Dallas, a visa is generally required unless they are citizens of a Visa Waiver Program country, in which case they must obtain ESTA approval for short visits."
      },
      "q3": {
        "question": "What are the ground transportation options in Lisbon?",
        "answer": "From Lisbon Portela Airport (LIS), the most-used option is the Aerobus, a dedicated shuttle with two lines that reach the city center in 20–40 minutes and cost €4 for a 24-hour pass. Public buses (routes 5, 22, 44, 45, 83) are the cheapest way into Lisbon. Taxis are available at ranks outside arrivals, with metered fares plus a standard surcharge, and ride‑sharing services also operate. There is no direct train, but a short taxi ride connects to metro stations like Gare do Oriente. Car rentals are on‑site for those who prefer to drive.",
        "toolsUsed": [],
        "references": [
          {
            "url": "http://lisbon-lis.airports-guides.com",
            "title": "Lisbon Portela Airport (LIS) Information: LIS Airport in Lisbon Area, Portugal"
          },
          {
            "url": "http://www.lisbon-lis.airports-guides.com/lis_airport_transport.html",
            "title": "Lisbon Portela Airport (LIS) Travel, Transport: Travel at Airports in Lisbon Area, Portugal",
            "time_published": "2016-03-03T00:00:00Z"
          },
          {
            "url": "https://www.lisbon-airport.net/",
            "title": "Lisbon Airport (LIS)"
          },
          {
            "url": "https://lisbonairport.net/lisbon-airport-transfers/bus/",
            "title": "Getting to Lisbon Airport by Bus",
            "time_published": "2019-03-02T00:00:00Z"
          },
          {
            "url": "https://lisbonairport.net",
            "title": "Lisbon Airport | Guide to Lisbon Airport (LIS)"
          }
        ]
      },
      "q4": {
        "question": "When is the cheapest time to fly from Dallas to Lisbon?",
        "answer": "The cheapest months to fly from Dallas to Lisbon are November, April, and October, with average fares around $804 to $828. The most expensive months are June and July, where average fares climb to about $1,050.",
        "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 Dallas to Lisbon?",
        "answer": "For flights from Dallas to Lisbon, the optimal booking window is roughly 9 to 11 weeks before departure, when average fares sit around $852. Booking very early (4+ months out) tends to be pricier, while last-minute deals occasionally dip lower, with a single-day low at 5 days out ($835). During peak summer and holiday periods, demand typically pushes prices higher, so aiming for that 9–11 week window becomes even more important to avoid steep premiums.",
        "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 Dallas to Lisbon?",
        "answer": "No nonstop red-eye flights operate from Dallas (DFW) to Lisbon. Connecting itineraries whose long leg is an overnight flight are available: the most frequent option is a British Airways overnight leg from DFW to London Heathrow departing around 7:40 PM and arriving at 10:55 AM (connecting to a BA flight to Lisbon), with similar overnight DFW–LHR legs also sold by Iberia and American. Other red-eye connections route through Philadelphia (American, departing 9:05 PM arriving 9:05 AM), Montreal (Air Canada, departing 9:45 PM arriving 9:20 AM), Toronto (Air Canada, departing 11:00 PM arriving 11:05 AM), Frankfurt (Lufthansa, departing 4:00 PM arriving 8:55 AM), Helsinki (Finnair, departing 4:50 PM arriving 11:05 AM), and Washington Dulles (United, departing 10:25 PM arriving 10:30 AM).",
        "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"
        ]
      },
      "q8": {
        "question": "If I need a connection, what are common layover cities between Dallas and Lisbon?",
        "answer": "Common layover cities include Madrid, London, Paris, and Amsterdam, which offer broad connections and efficient transfers. Madrid often provides the shortest total travel time, while London and Paris have extensive onward networks. Amsterdam is known for its single-terminal layout and smooth connections. US citizens can transit these hubs without a visa."
      },
      "q9": {
        "question": "How reliable are on‑time departures on this route from Dallas to Lisbon?",
        "answer": "On-time performance is generally reliable, though afternoon thunderstorms at DFW can cause delays. Early morning departures on American Airlines tend to have the best punctuality."
      },
      "q10": {
        "question": "Which months have the best weather for traveling to Lisbon?",
        "answer": "May to June and September to October offer pleasant temperatures and fewer tourists than summer."
      },
      "q11": {
        "question": "What documents should I bring with me to the airport when flying from Dallas to Lisbon?",
        "answer": "Bring a U.S. passport valid for at least three months beyond your stay, proof of onward or return travel, and a payment method for baggage. U.S. citizens do not need a visa for tourism under 90 days, but starting mid-2025 an ETIAS authorization will be required. Check for any vaccination requirements."
      },
      "q12": {
        "question": "Which airport should I use in Lisbon?",
        "answer": "Lisbon has only one commercial airport, Humberto Delgado Airport, located 7 km from downtown, serving all flights to the city."
      },
      "q13": {
        "question": "How do I get to Dallas Fort Worth Intl Airport from the city center?",
        "answer": "To reach Dallas Fort Worth International Airport from downtown Dallas, the most popular option is the DART Orange Line light rail, which runs directly to Terminal A and is both affordable and traffic-free. Ride-share services and taxis are widely available and offer door-to-door convenience, though they cost more and can be slowed by congestion. Driving and parking on-site is straightforward with ample garage and economy lots, but it's the priciest choice when factoring in daily parking fees. For the fastest trip, ride-share or a taxi typically beats public transit, especially outside peak hours.",
        "toolsUsed": [],
        "references": [
          {
            "url": "http://dfwairport.com/dfwnewsroom/dfw-is-ready-to-welcome-fifa-fans/",
            "title": "DFW International Airport | Official Website",
            "time_published": "2026-04-02T00:00:00Z"
          },
          {
            "url": "https://www.dfwairport.com/explore/transportation/publictransit/?utm_source=google&utm_medium=organic",
            "title": "DFW International Airport | Public Transit",
            "time_published": "2022-05-25T00:00:00Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/CentrePort%2FDFW%20Airport%20station",
            "title": "CentrePort/DFW Airport station",
            "time_published": "2025-12-07T14:04:09Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/CentrePort/DFW_Airport_station",
            "title": "CentrePort/DFW Airport station",
            "time_published": "2026-05-10T08:51:35Z"
          },
          {
            "url": "https://faa.gov/air_traffic/publications/atpubs/ntap_jan_31/SC17000.html",
            "title": "Texas. Prototype Runway Status Lights (RWSL) at Dallas/Fort Worth International Airport (DFW)",
            "favicon": "https://faa.gov/air_traffic/publications/atpubs/ntap_jan_31/assets/img/apple-touch-icon.png"
          }
        ]
      },
      "q17": {
        "question": "What aircraft are typically used on flights from Dallas to Lisbon?",
        "answer": "There is no nonstop service from Dallas–Fort Worth to Lisbon, so all flights involve a connection. On the long transatlantic leg the most common aircraft are the Boeing 777-300ER (typically via London Heathrow or Toronto), the Boeing 787-9 (via Philadelphia, London Heathrow, or Istanbul), and the Airbus A380-800 (via London Heathrow), with Airbus A330-300 and A350-900 also appearing on some routings. The shorter connecting legs within North America or Europe are usually operated by Airbus A320-family or Boeing narrowbody jets, though the exact aircraft can vary by day and airline. Wi‑Fi and seatback entertainment are widely available on these long‑haul aircraft, though the features differ by carrier.",
        "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"
        ]
      },
      "q20": {
        "question": "What are the best airport lounge options when departing from Dallas?",
        "answer": "At Dallas/Fort Worth International Airport (DFW) Terminal D, you'll find the American Express Centurion Lounge near gate D12, offering complimentary access for Platinum Card and Centurion members with premium dining, a full bar, and spa services. The Club DFW, accessible via Priority Pass or a day pass, is located on the mezzanine near gate D27 and features a buffet, bar, and shower facilities. Also in Terminal D, the Plaza Premium Lounge offers a restaurant voucher, sleep pods, and spa treatments. In Terminal E, eligible Delta flyers can use the Delta Sky Club. These lounges provide a range of pre-flight comforts, from work spaces to relaxation zones.",
        "toolsUsed": [],
        "references": [
          {
            "url": "https://prioritypass.com/lounges/usa/dallas-tx---dfw-international",
            "title": "Dallas/Fort Worth International Airport DFW Lounges - DFW Airport Guide and lounges.  | Priority Pass",
            "time_published": "2024-11-05T00:00:00Z"
          },
          {
            "url": "https://www.prioritypass.com/airport-guides/dallas-tx-dfw-international/terminal-d",
            "title": "Dallas TX - DFW International DFW Terminal D - Lounges and info. | Priority Pass",
            "time_published": "2026-01-01T00:00:00Z"
          },
          {
            "url": "http://www.americanexpress.com/en-us/travel/lounges/the-platinum-card/DFW/The-Club-DFW-Terminal-D-rlk6LeSCI0/",
            "title": "The Club DFW at Dallas-Fort Worth International Airport | Amex US",
            "favicon": "https://www.americanexpress.com/apple-touch-icon-152x152.png"
          },
          {
            "url": "https://americanexpress.com/en-us/travel/lounges/delta-reserve/DFW",
            "title": "American Express Lounges at Dallas-Fort Worth International Airport | Amex US",
            "time_published": "2026-05-01T00:00:00Z"
          },
          {
            "url": "https://www.dfwairport.com/dfwnewsroom/archivednews/two-new-lounges-mean-more-options-for-dfw-customers/",
            "title": "DFW International Airport | Official Website",
            "time_published": "2018-10-11T00:00:00Z"
          }
        ]
      },
      "q21": {
        "question": "What is the baggage allowance on this route from Dallas to Lisbon?",
        "answer": "Baggage policies vary by airline and fare type. Basic economy often excludes a checked bag, while standard international economy typically includes one checked bag and a carry‑on. Premium cabins offer more generous allowances."
      },
      "q22": {
        "question": "What cabin and seat options are typical from Dallas to Lisbon?",
        "answer": "Flights from Dallas to Lisbon typically offer Economy and flat‑bed Business class; Premium Economy is available on select airlines, while First class is uncommon."
      },
      "q23": {
        "question": "Are same‑day changes or standby possible on this route?",
        "answer": "Same‑day changes and standby depend on the airline and fare class, with flexible and premium tickets offering more generous options than restrictive economy fares."
      }
    }
  }
}