1. Portland (PWM) to Los Angeles (LAX): Approximately 6 hours and 35 minutes.
2. Bangor (BGR) to Los Angeles (LAX): Approximately 6 hours and 20 minutes.
3. Presque Isle (PQI) to Los Angeles (LAX): Approximately 8 hours and 45 minutes.
These flight times are approximate and may vary depending on factors such as weather conditions, winds, and the specific route taken by the airline. It's always best to check with the airline or refer to a flight tracking website for the most accurate and up-to-date flight times.