onwardticket.com

{
  "type": "object",
  "properties": {
    "from": {
      "type": "string",
      "pattern": "^[A-Za-z]{3}$",
      "description": "3-letter IATA airport code. Use search_airports to find it."
    },
    "to": {
      "type": "string",
      "pattern": "^[A-Za-z]{3}$",
      "description": "3-letter IATA airport code. Use search_airports to find it."
    },
    "departureDate": {
      "type": "string",
      "format": "date",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "description": "Departure date, YYYY-MM-DD. At least 10 days from today and within one year."
    },
    "returnDate": {
      "type": "string",
      "format": "date",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "description": "Optional return date for a round trip, YYYY-MM-DD, after the departure date."
    },
    "travelers": {
      "type": "array",
      "minItems": 1,
      "maxItems": 27,
      "description": "Every traveler, exactly as in their passport. At least one adult; no more infants than adults.",
      "items": {
        "type": "object",
        "properties": {
          "firstName": {
            "type": "string",
            "maxLength": 60,
            "description": "Given name(s). Letters, spaces, hyphens and apostrophes only."
          },
          "lastName": {
            "type": "string",
            "maxLength": 60,
            "description": "Surname. For multi-part surnames like 'De la Cruz', write them without spaces: 'Delacruz'."
          },
          "gender": {
            "type": "string",
            "enum": [
              "MALE",
              "FEMALE"
            ]
          },
          "type": {
            "type": "string",
            "enum": [
              "ADULT",
              "CHILD",
              "INFANT"
            ],
            "default": "ADULT",
            "description": "CHILD is 2-11 years, INFANT under 2."
          },
          "dateOfBirth": {
            "type": "string",
            "format": "date",
            "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
            "description": "Optional, YYYY-MM-DD."
          }
        },
        "required": [
          "firstName",
          "lastName",
          "gender"
        ]
      }
    },
    "email": {
      "type": "string",
      "format": "email",
      "maxLength": 254,
      "description": "Where the reservation and receipt are sent."
    },
    "flexible": {
      "type": "boolean",
      "default": false,
      "description": "Flexible Reservation add-on (+$8.00): one correction of name, date or route."
    },
    "activateLater": {
      "type": "boolean",
      "default": false,
      "description": "Activate later (+$2.00): receive an activation link and start the 48-hour validity when ready to travel."
    }
  },
  "required": [
    "from",
    "to",
    "departureDate",
    "travelers",
    "email"
  ]
}