SearchGoogleFlights searches Google Flights for available itineraries on a specific date.
Departure airport IATA code (e.g. "JFK").
Arrival airport IATA code (e.g. "LHR").
Departure date in YYYY-MM-DD format.
Return date in YYYY-MM-DD format; omit for one-way.
Cabin class: ECONOMY, PREMIUM_ECONOMY, BUSINESS, or FIRST.
Stop filter: ANY, NON_STOP, ONE_STOP, or TWO_PLUS_STOPS.
Departure time window in HH-HH format (e.g. "6-20").
Airline IATA codes to filter by (e.g. ["BA", "AA"]).
Sort order: CHEAPEST, DURATION, DEPARTURE_TIME, or ARRIVAL_TIME.
Number of adult passengers (1-9).