{"response": {"Key": "LIS-ORD", "orig": {"code": "LIS", "type": "airport", "city": "Lisbon", "fullCity": "Lisbon, Portugal", "airport": "Humberto Delgado Airport"}, "dest": {"code": "ORD", "type": "airport", "city": "Chicago", "fullCity": "Chicago, Illinois", "airport": "O'Hare Intl Airport"}, "faq": {"q0": {"question": "What is the typical flight duration from Lisbon to Chicago?", "answer": "The flight from Lisbon to Chicago is about 3,990 miles and typically takes 9 hours 20 minutes nonstop on TAP Air Portugal. The return leg is shorter at 8 hours 10 minutes, a difference of over an hour due to prevailing winds.", "methodology": "Carrier service, flight times and distances for this route come 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). We report the days of the week and the departure times each carrier operates. The typical flight time is the median scheduled block time, given both per carrier and across all carriers on the route; where a schedule does not publish an elapsed time, it is derived from the scheduled departure and arrival times converted to UTC. Outbound and return times are computed by the same method, so the difference between them is directly comparable and reflects prevailing winds rather than any change in derivation. Distance is the great-circle distance between the two specific airports named, so an actual flown track is typically 2-5% longer. Where shown, on-time departure and arrival rates and cancellation rates come from the U.S. Bureau of Transportation Statistics (BTS) Airline On-Time Performance dataset, which covers U.S. domestic routes only; where a typical fare is shown, it comes from the U.S. DOT Airline Origin and Destination Survey (DB1B), a quarterly 10% sample of tickets sold.", "toolsUsed": ["flight_schedule"]}, "q3": {"question": "What are the ground transportation options in Chicago?", "answer": "From Chicago O'Hare, the CTA Blue Line train is the most-used and fastest option, running directly from the airport to downtown in about 45 minutes. Taxis, rideshares like Uber and Lyft, and rental cars are readily available, with rideshares offering a convenient door-to-door alternative. Several airport shuttles and regional buses also serve the airport and surrounding areas. For budget-conscious travelers, the Blue Line is the clear winner, while those with more luggage or in a hurry may prefer a taxi or rideshare.", "toolsUsed": [], "references": [{"url": "https://flychicago.com/ohare/tofrom/pages/default.aspx", "title": "Getting To and From O'Hare International Airport | Chicago O’Hare International Airport (ORD)", "favicon": "https://flychicago.com/_catalogs/masterpage/favicon.ico"}, {"url": "https://www.flychicago.com/ohare/map", "title": "Map | Chicago O’Hare International Airport (ORD)", "time_published": "2026-05-27T00:00:00Z"}, {"url": "https://en.wikipedia.org/wiki/Transportation_in_Chicago", "title": "Transportation in Chicago", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-05-15T02:56:07Z"}, {"url": "https://en.wikipedia.org/wiki/Transportation%20in%20Chicago", "title": "Transportation in Chicago", "time_published": "2026-04-13T06:59:09Z"}, {"url": "https://faa.gov/regulations_policies/orders_notices/index.cfm/go/document.information/documentID/6111", "title": "Order  3330.39 - Chicago/o'hare Airport Traffic Control Tower (ATCT) Staffing PChicago/o'hare Airport Traffic Control Tower (ATCT) Staffing Plan (Cancelled)", "time_published": "2026-04-10T00:00:00Z"}]}, "q4": {"question": "When is the cheapest time to fly from Lisbon to Chicago?", "answer": "The cheapest months to fly from Lisbon to Chicago are October, April, and November, with average fares around $736 to $760. The most expensive months are June, July, and May, where average prices climb to roughly $1,036 to $1,210.", "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. For this route, fares for the requested travel direction were unavailable, so the pattern shown is derived from the reverse direction, which shares the same seasonal demand cycle.", "toolsUsed": ["seasonal_prices"]}, "q5": {"question": "How far in advance should I book tickets from Lisbon to Chicago?", "answer": "For flights from Lisbon to Chicago, the optimal booking window is about 9 to 12 weeks before departure, with average fares around $825 during that period. The single cheapest fare observed is $819 at around 75 days out, while prices tend to rise sharply if booked more than 15 weeks ahead or within a few weeks of travel. Summer and holiday periods likely push the ideal window slightly earlier, as demand peaks, so aim for 12 to 15 weeks ahead for those seasons.", "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. For this route, fares for the requested travel direction were unavailable, so the pattern shown is derived from the reverse direction, which shares the same seasonal demand cycle.", "toolsUsed": ["booking_timing"]}, "q6": {"question": "Are overnight (red‑eye) flights available from Lisbon to Chicago?", "answer": "No overnight red‑eye flights operate from Lisbon to Chicago — neither nonstop nor connecting itineraries with a red‑eye long leg are available on this route.", "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 Lisbon to Chicago?", "answer": "TAP Air Portugal is the only airline flying nonstop from Lisbon to Chicago, with 11 weekly flights on Wednesdays through Sundays, typically departing between late morning and early afternoon. The median fare for these nonstop flights is around $1,674. Other airlines may offer connecting itineraries, but TAP is the sole carrier with direct service on this route.", "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"]}, "q8": {"question": "If I need a connection, what are common layover cities between Lisbon and Chicago?", "answer": "Common layover cities include Dublin, Madrid, London, and Amsterdam. Dublin offers US preclearance, saving time on arrival. Madrid provides efficient connections on Iberia. London and Amsterdam are major hubs with broad transatlantic networks and smooth transfer processes. For Lisbon to Chicago, these hubs keep total travel time competitive."}, "q10": {"question": "Which months have the best weather for traveling to Chicago?", "answer": "May to early 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 Lisbon to Chicago?", "answer": "Bring a passport valid for your stay, a valid U.S. visa or ESTA authorization, and a payment method for any baggage fees. Check if proof of onward travel is required by your airline."}, "q12": {"question": "Which airport should I use in Chicago?", "answer": "O'Hare is the primary international gateway and major hub for United and American Airlines, located about 17 miles northwest of downtown. Midway is closer to the city centre and serves mostly domestic flights, dominated by Southwest. For international arrivals, O'Hare is the standard choice."}, "q13": {"question": "How do I get to Humberto Delgado Airport from the city center?", "answer": "From downtown Lisbon, the Metro Red Line provides a direct and popular connection to Humberto Delgado Airport, typically taking around 20–25 minutes. Aerobus shuttle services also run frequently from the city center, offering a slightly longer but comfortable ride. Taxis and ride‑share are readily available and are the fastest door‑to‑door option, with a fixed surcharge from the airport, while driving yourself is possible though parking at the airport is relatively expensive.", "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)"}]}, "q14": {"question": "Are there hotels or sleeping facilities at Chicago airport?", "answer": "Chicago O'Hare Airport does not have on-site hotels, capsule hotels, or sleeping pods inside the terminals. The Hilton Chicago O'Hare is connected to the domestic terminals via an underground walkway and does not require a shuttle, while several other nearby hotels like SpringHill Suites and Chicago Marriott Suites O'Hare offer complimentary shuttle service from the airport.", "toolsUsed": [], "references": [{"url": "https://sleepinginairports.net/guides/chicago-ohare-airport-guide.htm", "title": "Chicago O'Hare Airport Guide (ORD) - 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": "2018-08-08T19:18:20Z"}, {"url": "https://www.marriott.com/en-us/hotels/chico-springhill-suites-chicago-ohare/overview/?scid=f2ae0541-1279-4f24-b197-a979c79310b0", "title": "Hotel near O'Hare Airport with Free Shuttle | Springhill Suites", "time_published": "2025-02-19T00:00:00Z"}, {"url": "https://www.marriott.com/en-us/hotels/chico-springhill-suites-chicago-ohare/overview/", "title": "Hotel near O'Hare Airport with Free Shuttle | Springhill Suites Chicago O'Hare", "time_published": "2023-08-11T00:00:00Z"}, {"url": "https://www.sleepinginairports.net/sleep-guide/sleeping-in-chicago-ohare-airport.htm", "title": "Sleeping in Chicago O’Hare Airport", "time_published": "2024-09-12T00:00:00Z"}, {"url": "https://en.wikipedia.org/wiki/O%27Hare%20International%20Airport", "title": "O'Hare International Airport", "time_published": "2026-04-30T12:30:58Z"}, {"url": "https://www.marriott.com/en-us/hotels/chist-chicago-marriott-suites-ohare/overview/?scid=f2ae0541-1279-4f24-b197-a979c79310b0", "title": "Hotels Near O'Hare Airport in Chicago | Chicago Marriott Suites O'Hare Hotel", "time_published": "2023-08-11T00:00:00Z"}]}, "q15": {"question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at O'Hare Intl Airport?", "answer": "O'Hare International Airport offers currency exchange services through banks and ATMs located throughout the terminals. The airport provides a chapel and an interfaith room for prayer and meditation. Free Wi‑Fi is available across all terminals, with charging stations to help you stay connected.", "toolsUsed": [], "references": [{"url": "https://flychicago.com/ohare/ServicesAmenities/services/pages/default.aspx", "title": "Services  | Chicago O’Hare International Airport  (ORD)", "time_published": "2026-05-05T00:00:00Z"}, {"url": "https://www.flychicago.com/ohare/map", "title": "Map | Chicago O’Hare International Airport (ORD)", "time_published": "2026-05-27T00:00:00Z"}, {"url": "https://en.wikipedia.org/wiki/O%27_Hare_International_Airport", "title": "O'Hare International Airport", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2003-06-18T03:43:42Z"}, {"url": "https://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/air_traffic_services/atct/ord", "title": "Chicago O'Hare International Airport (ORD) | Federal Aviation Administration", "time_published": "2023-02-23T00:00:00Z"}, {"url": "https://en.wikipedia.org/w/index.php?oldid=828932762&redirect=no&title=O%27Hare_International_Airport", "title": "O'Hare International Airport - Wikipedia", "time_published": "2003-06-18T03:43:42Z"}]}, "q17": {"question": "What aircraft are typically used on flights from Lisbon to Chicago?", "answer": "There is no nonstop service from Lisbon to Chicago, so travelers connect through a European or North American hub. On the long‑haul transatlantic leg, the most common aircraft are the Boeing 777 (including the -300ER variant), Boeing 787-8/-9/-10, Airbus A330 (including the -300), and occasionally the Boeing 747-8I or Airbus A340-300, depending on the airline and connecting city. The exact type varies by carrier and day, and while Wi‑Fi and seatback entertainment are widely available on these aircraft, specific features depend on the airline.", "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 Lisbon?", "answer": "Lisbon Portela Airport (LIS) has one main lounge: the ANA Lounge in Terminal 1, accessible after security and passport control near Gate 22 on Floor 6, serving both Schengen and non-Schengen flights. It is open daily from 04:00 to 23:00 and accepts Priority Pass, with complimentary alcoholic drinks (up to three), a smoking room, and a business center available for a fee. Entry is also available to business class passengers and elite status holders of partner airlines, though day passes may be purchased directly. Note that no airline-branded lounges (such as Delta Sky Club or United Club) operate at this airport.", "toolsUsed": [], "references": [{"url": "http://lisbon-lis.airports-guides.com", "title": "Lisbon Portela Airport (LIS) Information: LIS Airport in Lisbon Area, Portugal"}, {"url": "https://my.prioritypass.com/en-GB/lounges/portugal/lisbon-portela", "title": "Lisbon Airport LIS Lounges - LIS Airport Guide and lounges.  | Priority Pass", "time_published": "2024-11-05T00:00:00Z"}, {"url": "https://prioritypass.com/en-GB/lounges/portugal/lisbon-portela/lis6-ana-lounge-lisbon", "title": "ANA Lounge Lisbon LIS AIRPORT Terminal 1 Lisbon Portela | Priority Pass", "time_published": "2024-11-05T00:00:00Z"}, {"url": "http://www.lisbon-lis.airports-guides.com/lis_airport_airlines.html", "title": "Lisbon Portela Airport (LIS) Airlines and Terminals: Airlines at Airports in Lisbon Area, Portugal", "time_published": "2016-03-03T00:00:00Z"}, {"url": "https://americanexpress.com/en-us/travel/lounges/the-platinum-card/LIS", "title": "American Express Lounges at Lisbon Portela Airport | Amex US", "favicon": "https://www.americanexpress.com/apple-touch-icon-152x152.png"}]}, "q21": {"question": "What is the baggage allowance on this route from Lisbon to Chicago?", "answer": "Baggage rules on Lisbon–Chicago flights depend on the airline and fare class. Basic Economy often excludes checked bags but still permits a carry‑on. Standard international economy typically includes one checked bag, while premium cabins offer more."}, "q22": {"question": "What cabin and seat options are typical from Lisbon to Chicago?", "answer": "Flights from Lisbon to Chicago generally offer Economy, Premium Economy, and flat-bed Business class."}, "q23": {"question": "Are same‑day changes or standby possible on this route?", "answer": "Policies vary by airline and fare; flexible and premium cabin tickets typically allow same‑day changes or standby, while deeply discounted economy fares generally do not."}}}}