{"response": {"Key": "LIS-CHI", "orig": {"code": "LIS", "type": "airport", "city": "Lisbon", "fullCity": "Lisbon, Portugal", "airport": "Humberto Delgado Airport"}, "dest": {"code": "CHI", "type": "airport", "city": "Chicago", "fullCity": "Chicago, Illinois", "airport": "Dupage County"}, "faq": {"q0": {"question": "What is the typical flight duration from Lisbon to Chicago?", "answer": "The flight from Lisbon to Chicago is about 3,999 miles. Nonstop service on TAP Air Portugal takes roughly 9 hours and 20 minutes westbound, while the return flight is about 8 hours and 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"]}, "q1": {"question": "Are there any direct flights from Lisbon to Chicago?", "answer": "Yes, TAP Air Portugal flies nonstop from Lisbon to Chicago O'Hare (ORD) with 11 weekly flights, operating Wednesdays through Sundays. The typical flight time is about 9 hours 20 minutes eastbound. No other airline offers nonstop 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. 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": ["route_airlines", "flight_schedule"]}, "q3": {"question": "What are the ground transportation options in Chicago?", "answer": "From Chicago O'Hare (ORD), the CTA Blue Line 'L' train is the fastest and most-used option, taking about 40–45 minutes to the Loop for $2.50–$5.00. Taxis and rideshares like Uber and Lyft are readily available, with a typical downtown trip costing $40–$55 and taking 30–60 minutes depending on traffic. Metra commuter rail, airport shuttles, and regional buses also serve O'Hare, while rental car facilities are on-site. The Blue Line is generally the most efficient and popular choice for travelers heading downtown.", "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, $755, and $760. The most expensive months are June, July, and May, where average prices climb to $1210, $1089, and $1036. Late spring and early summer are the priciest, while early fall and mid-spring offer the best deals.", "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 best fares are typically found when booking 9 to 12 weeks ahead, with an average price around $825. The absolute cheapest single day to book is about 75 days before departure at $819. During peak summer and holiday periods, demand pushes prices higher, so aiming for the earlier end of that window or even a bit further out can help lock in a better deal.", "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 are available from Lisbon to Chicago — neither nonstop nor connecting itineraries with a red-eye long leg operate 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 operates non‑stop from Lisbon to Chicago O'Hare with up to 11 weekly flights on Wednesdays through Sundays, departing between 9:20 AM and 1:30 PM. Other carriers may also serve the route via a connection.", "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 between Lisbon and Chicago include Dublin, Madrid, London and Philadelphia. Dublin offers US pre‑clearance which saves time on arrival, while Madrid and London provide extensive transatlantic networks. Philadelphia is a major American Airlines hub with smooth domestic connections."}, "q10": {"question": "Which months have the best weather for traveling to Chicago?", "answer": "May, June, and September offer pleasant temperatures and fewer tourists than the peak summer months of July and August."}, "q11": {"question": "What documents should I bring with me to the airport when flying from Lisbon to Chicago?", "answer": "Bring a passport valid for at least six months, your ESTA authorization, proof of return travel, a payment method for baggage and any required vaccination or insurance documents."}, "q12": {"question": "Which airport should I use in Chicago?", "answer": "Chicago has two major airports. O'Hare is the primary international gateway, located about 17 miles northwest of downtown, and serves as a hub for United and American Airlines with extensive global connections. Midway is closer to downtown, about 10 miles southwest, and is dominated by Southwest Airlines, focusing on domestic and some nearby international flights, often with lower fares."}, "q13": {"question": "How do I get to Humberto Delgado Airport from the city center?", "answer": "To get from downtown Lisbon to Humberto Delgado Airport, the Metro’s red line is the fastest and most popular option, taking about 20–25 minutes from central stations like Baixa-Chiado or Rossio. Several public bus routes (including 5, 22, 44, 45, and 83) and the dedicated Aerobus shuttle also serve the airport, offering a cheaper but slower ride. Taxis and ride‑share services are readily available and provide door‑to‑door convenience at a moderate cost, with a standard airport surcharge. Driving and parking at the airport is possible but generally less convenient for city‑center visitors given the short distance and efficient transit alternatives.", "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 International Airport (ORD) does not have on-site hotels, capsule hotels, or sleeping pods directly inside the terminals. For nearby accommodations, the Hilton Chicago O'Hare Airport is connected to the terminals via underground walkways, and several other hotels like the SpringHill Suites Chicago 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 Dupage County?", "answer": "Chicago O'Hare International Airport (ORD) offers currency exchange through ATMs and banks located throughout the terminals. There are chapels and an interfaith room for prayer and reflection. Free Wi-Fi is available across all terminals, along with charging stations to keep devices powered.", "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 all flights connect. On the transatlantic long leg, the most common aircraft are Boeing 777-300ERs (via Toronto on Air Canada), Airbus A330-300s (via Montreal or Madrid), Boeing 777s (via London Heathrow on British Airways or Washington Dulles on United), and Boeing 787-10s (via Frankfurt on United). The exact aircraft varies by day and airline; Wi‑Fi and seatback entertainment are widely available on these long‑haul types.", "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": "At Lisbon Portela Airport, the primary lounge available to passengers departing for Chicago is the ANA Lounge in Terminal 1, located after security and passport control near Gate 22 on Floor 6. This lounge is accessible to Priority Pass members, as well as business-class travelers and elite status holders on select airlines, and features complimentary alcoholic drinks, a smoking room, and a business center (subject to payment). It operates daily from 4:00 AM to 11:00 PM, covering most transatlantic departure times. Other airline-branded lounges, such as those from TAP Air Portugal, are not confirmed for this route, and no American Express Centurion Lounge is available at LIS.", "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": "Allowance depends on airline and fare. Basic economy often excludes checked bags; standard international economy typically includes one checked bag and a carry‑on. Premium economy and business fares offer more generous allowances."}, "q22": {"question": "What cabin and seat options are typical from Lisbon to Chicago?", "answer": "On flights from Lisbon to Chicago, you can typically choose from Economy, Premium Economy, and lie-flat Business class, with First class being uncommon."}, "q23": {"question": "Are same‑day changes or standby possible on this route?", "answer": "Policies depend on the airline and fare type; premium and flexible tickets often allow same‑day changes or standby, while basic economy typically does not."}}}}