interface FlightData {
    flightNumber: string;
    flightDate: string;
    status: string;
    airline?: string;
    aircraft?: string;
    departure: {
        airport: string;
        airportName?: string;
        scheduled: string;
        estimated?: string;
        actual?: string;
        terminal?: string;
        gate?: string;
    };
    arrival: {
        airport: string;
        airportName?: string;
        scheduled: string;
        estimated?: string;
        actual?: string;
        terminal?: string;
        gate?: string;
    };
    delay?: number;
    lastUpdated: string;
    source: 'google' | 'aviationstack' | 'not_found';
}
interface FlightSearchParams {
    flightNumber: string;
    date: string;
    departureAirport?: string;
    arrivalAirport?: string;
}
declare class FlightService {
    private flightCache;
    private updateIntervals;
    constructor();
    getFlightInfo(params: FlightSearchParams): Promise<FlightData | null>;
    private scrapeGoogleFlights;
    private getFromAviationStack;
    startPeriodicUpdates(params: FlightSearchParams, intervalMinutes?: number): void;
    stopPeriodicUpdates(key: string): void;
    getMultipleFlights(flightParams: FlightSearchParams[]): Promise<{
        [key: string]: FlightData | null;
    }>;
    private normalizeStatus;
    cleanup(): void;
}
declare const _default: FlightService;
export default _default;
export { FlightData, FlightSearchParams };
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