Travelmath offers an excellent calculator for determining approximate flight times between cities. Users enter a departure and destination city and the system gives an estimate of flight time, allotting half an hour for ... More »

Which airline offers the better deal depends on numerous factors, such as arrival and departure cities, flight time and when the ticket is purchased. As of July 2015, Allegiant Air typically flies based on customer deman... More » Geography

Southwest Airlines allows online check-in up to 24 hours prior to a flight's departure time. Passengers must be checked in at least 60 minutes before departure, have an electronic ticket and not require special boarding ... More » Geography

For a small fee, Southwest Airlines' Early Bird Check-In allows passengers to check-in to a flight automatically up to 36 hours prior to the flight's scheduled departure time. This feature includes an early assigned boar... More » Geography

Airlines such as Frontier and United suggest checking in online anywhere from 24 hours to 60 minutes before a flight's departure time. Doing so allows customers to avoid check-in counter lines and go straight to security... More » Geography

The majority of airlines, including American Airlines and United Airlines, allow passengers to check-in online from 24 hours up to 45 minutes before a domestic flight's scheduled departure time. The latest online check-i... More » Geography

When traveling through Los Angeles International Airport, it is best to arrive at least two hours prior to your flight's scheduled departure time and to check in beforehand online. If parking in one of the LAX parking lo... More » Geography