{
  "response": {
    "Key": "IAD-SAL",
    "orig": {
      "code": "IAD",
      "type": "airport",
      "city": "Washington",
      "fullCity": "Washington, United States",
      "airport": "Washington Intl Airport"
    },
    "dest": {
      "code": "SAL",
      "type": "airport",
      "city": "San Salvador",
      "fullCity": "San Salvador, El Salvador",
      "airport": "Arnulfo Romero Airport"
    },
    "faq": {
      "q0": {
        "question": "What is the typical flight duration from Washington to San Salvador?",
        "answer": "A nonstop flight from Washington Dulles (IAD) to San Salvador (SAL) typically takes around 4 hours 30 minutes. If you have a layover, common connecting cities like Miami or Houston bring total travel time to about 7 to 9 hours."
      },
      "q2": {
        "question": "Are there visa requirements to travel from Washington to San Salvador?",
        "answer": "Yes. U.S. citizens do not need a visa for tourist visits up to 90 days in El Salvador, but they must purchase a tourist card on arrival. Salvadoran citizens need a visa to enter the U.S. unless they hold a valid U.S. visa or are otherwise eligible for entry under U.S. law. Other nationalities should check both Salvadoran and U.S. entry requirements based on their citizenship."
      },
      "q3": {
        "question": "What are the ground transportation options in San Salvador?",
        "answer": "From El Salvador International Airport (SAL), the most reliable and widely used option is a pre-booked taxi or a ride-share service like Uber, as public transit is limited and not recommended for visitors. Official taxis with fixed rates are available at the terminal and offer a safe, direct trip to the city center in about 45 minutes. Uber operates in the area but may face restrictions on airport pickups, so it's often used for the return journey. Car rentals are available from major agencies at the airport, though driving in San Salvador can be challenging for newcomers. There is no direct rail or dedicated airport bus service, making private vehicles or taxis the only practical choices.",
        "toolsUsed": [],
        "references": [
          {
            "url": "https://en.wikipedia.org/wiki/Sal",
            "title": "Sal",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-07-18T11:49:00Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/City_Airport_Train",
            "title": "City Airport Train",
            "time_published": "2026-05-28T15:36:05Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/City%20Airport%20Train",
            "title": "City Airport Train",
            "time_published": "2026-03-03T11:01:10Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/List_of_airport_rail_link_systems",
            "title": "List of airport rail link systems",
            "time_published": "2026-06-20T23:01:07Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Airport_rail_link",
            "title": "Airport rail link",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-03-26T08:26:52Z"
          }
        ]
      },
      "q4": {
        "question": "When is the cheapest time to fly from Washington to San Salvador?",
        "answer": "The cheapest months to fly from Washington to San Salvador are May and April, with average fares around $418 and $424, while the most expensive month is December, averaging $745. Low season runs May through July, shoulder season spans August to November, and high season covers January through March and December.",
        "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 Washington to San Salvador?",
        "answer": "For the Washington to San Salvador route, the optimal booking window is roughly 6 to 9 weeks before departure, with the absolute cheapest fare around 45 days out at $501. Booking very last minute (0 days) can cost about $617, so you'll save over $100 by reserving a month and a half ahead. For summer or holiday travel, you should add 2-4 weeks to that window, as demand typically pushes the best fares a bit earlier.",
        "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 Washington to San Salvador?",
        "answer": "No overnight (red‑eye) flights operate on the Washington (IAD) to San Salvador (SAL) route — there are no nonstop red‑eyes, and no connecting itineraries were found whose long leg is a red‑eye.",
        "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 Washington to San Salvador?",
        "answer": "Avianca, Volaris El Salvador, United, and Frontier all fly nonstop from Washington Dulles to San Salvador. Avianca is the most frequent with 78 weekly flights and a median fare around $816, while United offers 21 weekly flights at a median of about $755. Volaris El Salvador operates 47 weekly flights, and Frontier has 8 weekly flights with a median fare near $981.",
        "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 Washington and San Salvador?",
        "answer": "Common layover cities include Miami, Houston, and Atlanta, which offer frequent connections and efficient transfer processes, keeping total travel time competitive."
      },
      "q9": {
        "question": "How reliable are on‑time departures on this route from Washington to San Salvador?",
        "answer": "On‑time performance is usually dependable, though afternoon thunderstorms at Dulles can cause delays. Morning departures, particularly on Avianca or United, tend to be more punctual."
      },
      "q10": {
        "question": "Which months have the best weather for traveling to San Salvador?",
        "answer": "November to April offers dry, sunny days with comfortable temperatures and fewer tourists."
      },
      "q11": {
        "question": "What documents should I bring with me to the airport when flying from Washington to San Salvador?",
        "answer": "Bring a passport valid for at least six months beyond entry, proof of onward or return travel, a payment method for baggage, and any required vaccination certificates. U.S. citizens do not need a visa for stays up to 90 days."
      },
      "q12": {
        "question": "Which airport should I use in San Salvador?",
        "answer": "San Salvador has one international airport, El Salvador International Airport, located about 40 km from downtown San Salvador. It serves as the primary hub for Avianca and hosts flights from major U.S. carriers, making it the only option for international arrivals."
      },
      "q13": {
        "question": "How do I get to Washington Intl Airport from the city center?",
        "answer": "From downtown Washington, D.C., the most popular and fastest public transit option is the Silver Line Metrorail, reached from Dulles by the Silver Line Express bus ($5) to the Wiehle-Reston East station; the train then runs to the city center. Taxis (Washington Flyer) and ride‑share services like Uber and Lyft are available curbside and offer door‑to‑door convenience, with taxis generally more expensive than the train. Shared‑ride vans (SuperShuttle, Supreme Shuttle) provide a middle ground in cost. Driving and parking are straightforward, with on‑airport economy lots starting at $15 per day and free shuttle buses to the terminal.",
        "toolsUsed": [],
        "references": [
          {
            "url": "https://flydulles.com/flight-schedule-dulles-international-airport-iad",
            "title": "flydulles.com - Flight Schedule - Dulles International Airport (IAD)",
            "time_published": "2022-03-01T00:00:00Z"
          },
          {
            "url": "https://parking.flydulles.com/economy-parking",
            "title": "Dulles International Airport Parking | Economy Parking",
            "time_published": "2026-02-06T00:00:00Z"
          },
          {
            "url": "https://www.mwaa.com/ipw-2017-archived",
            "title": "IPW 2017 - Archived",
            "time_published": "2021-02-01T00:00:00Z"
          },
          {
            "url": "https://www.mwaa.com/policefireems/fire-ems/fire-ems-washington-dulles-international-airport",
            "title": "mwaa.com - Fire & EMS at Washington Dulles International Airport",
            "favicon": "https://www.mwaa.com/themes/custom/mwaa_barrio/favicon.ico",
            "time_published": "2023-09-01T00:00:00Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Dulles%20International%20Airport",
            "title": "Dulles International Airport",
            "time_published": "2026-04-30T14:07:38Z"
          }
        ]
      },
      "q14": {
        "question": "Are there hotels or sleeping facilities at San Salvador airport?",
        "answer": "San Salvador International Airport (SAL) does not have on-site hotels, capsule hotels, or sleeping pods. Overnight sleepers are restricted to the Main Hall landside, where seating is limited. Nearby hotels offer free shuttle service for a more comfortable rest.",
        "toolsUsed": [],
        "references": [
          {
            "url": "https://www.sleepinginairports.net/usa/saltlakecity.htm",
            "title": "Salt Lake City Airport Guide (SLC) - Sleeping in Airports",
            "time_published": "2026-05-29T21:57:18Z"
          },
          {
            "url": "https://www.sleepinginairports.net/guides/salalah-airport-guide.htm",
            "title": "Salalah Airport Guide (SLL) - Sleeping in Airports",
            "time_published": "2026-05-07T18:46:07Z"
          },
          {
            "url": "http://activities.marriott.com/north-america/el-salvador/san-salvador/activities/shared_departure_transfer_san_salvador_to_el_salvador_international_airport-XDBQHR?property=SALFI",
            "title": "Shared Departure Transfer | San Salvador to El Salvador International Airport",
            "time_published": "2026-01-01T00:00:00Z"
          },
          {
            "url": "http://activities.marriott.com/north-america/el-salvador/san-salvador/activities/private_departure_transfer_san_salvador_hotels_to_international_airport-X1A2BV?property=SALFI",
            "title": "Private Departure Transfer | San Salvador Hotels to International Airport",
            "time_published": "2026-04-26T00:00:00Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Farman_Salmanov_Surgut_Airport",
            "title": "Farman Salmanov Surgut Airport",
            "time_published": "2026-07-05T23:53:25Z"
          },
          {
            "url": "https://sleepinginairports.net/guides/san-salvador-airport-guide.htm",
            "title": "San Salvador Airport Guide (SAL) - 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": "2018-10-02T00:00:09Z"
          }
        ]
      },
      "q17": {
        "question": "What aircraft are typically used on flights from Washington to San Salvador?",
        "answer": "The nonstop flights from Washington Dulles to San Salvador are operated with Airbus A320-family and Boeing 737 MAX aircraft — Avianca flies the Airbus A320-100 and A320neo, while United uses the Boeing 737 MAX 9. On connecting itineraries, the long leg is typically a Boeing 737 (737-700, -800, -900, MAX 8, or MAX 9) or an Airbus A319/A320 via hubs like Houston, Miami, or Dallas. The exact aircraft can vary by day and airline, and Wi-Fi and seatback entertainment are widely available on these 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"
        ]
      },
      "q18": {
        "question": "Which airline alliances serve flights from Washington to San Salvador?",
        "answer": "Star Alliance is the only alliance with nonstop service on the Washington–Dulles to San Salvador route, via Avianca (AV) and United (UA). Volaris El Salvador (N3) and Frontier (F9) also fly nonstop but belong to no alliance. Other alliances may serve the route through connections, but none operate nonstop.",
        "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"
        ]
      },
      "q20": {
        "question": "What are the best airport lounge options when departing from Washington?",
        "answer": "Washington Dulles offers several lounge options across its concourses. The Capital One Lounge near PreCheck serves all passengers with day passes starting at $65, featuring local food and grab-and-go items. Priority Pass and Amex Platinum cardholders can access the Virgin Atlantic Clubhouse, Air France/KLM Lounge, and the Etihad Airways Lounge (also a Chase Sapphire Lounge). Turkish Airlines operates a lounge in Concourse B, while the Lufthansa Business and Senator lounges are temporarily closed.",
        "toolsUsed": [],
        "references": [
          {
            "url": "https://americanexpress.com/en-us/travel/lounges/the-platinum-card/IAD",
            "title": "American Express Lounges at Washington Dulles International Airport | Amex US",
            "time_published": "2026-01-01T00:00:00Z"
          },
          {
            "url": "https://prioritypass.com/en-GB/lounges/united-states-of-america/washington-dulles-international",
            "title": "Washington Dulles International Airport IAD Lounges - IAD Airport Guide and lounges.  | Priority Pass",
            "time_published": "2024-11-05T00:00:00Z"
          },
          {
            "url": "https://americanexpress.com/en-th/travel/lounges/the-platinum-card/IAD",
            "title": "American Express Lounges at Washington Dulles International Airport | Amex TH",
            "time_published": "2026-01-01T00:00:00Z"
          },
          {
            "url": "https://www.flydulles.com/travel-information/services-amenities/airport-lounges/capital-one-lounge-iad",
            "title": "Capital One Lounge - IAD | flydulles.com",
            "time_published": "2022-03-01T00:00:00Z"
          },
          {
            "url": "https://my.prioritypass.com/zh-CN/lounges/united-states-of-america/washington-dulles-international/iad6-air-france-klm-lounge",
            "title": "Air France - KLM Lounge IAD AIRPORT A 大厅 杜勒斯国际机场 (Washington DC Dulles Intl) | Priority Pass",
            "time_published": "2024-11-05T00:00:00Z"
          }
        ]
      },
      "q21": {
        "question": "What is the baggage allowance on this route from Washington to San Salvador?",
        "answer": "Baggage policies vary by airline. Basic economy fares on this route often exclude checked bags, while standard economy typically includes one checked bag and a carry‑on. Premium cabins offer additional allowances."
      },
      "q22": {
        "question": "What cabin and seat options are typical from Washington to San Salvador?",
        "answer": "Flights from Washington Dulles to San Salvador typically offer Economy and flat‑bed Business class; Premium Economy is not commonly available on this route."
      },
      "q23": {
        "question": "Are same‑day changes or standby possible on this route?",
        "answer": "Policies vary by airline and fare; flexible and premium cabin tickets generally allow same‑day changes or standby, while Basic Economy typically does not."
      }
    }
  }
}