American Airlines Online Check-in
What You'll Need: Passenger name and record locator (six-letter reference code), or AAdvantage number and password.When to Check In: Online check-in is available after 24 hours prior to flight until one hour before departure time. You may check in for return flight, as well, so long as trip is within 24 hours of initial check-in.
British Airways Online Check-in
What You'll Need: Passenger name and booking reference (six-digit alpha-numeric code).When to Check In: Online check-in is available after 24 hours prior to flight until one hour before departure time.
Contenental Online Check-in
What You'll Need: Confirmation number, eTicket number or OnePass number.When to Check In: Online check-in is available after 24 hours prior to flight until one hour before departure time.
Delta Online Check-in
What You'll Need: SkyMiles number and pin or one of the following: confirmation, eTicket or Credit Card number.When to Check In: Online check-in is available after 24 hours prior to flight until 30 minutes before departure time (one hour prior to international departures).
jetBlue Online Check-in
What You'll Need: TrueBlue login information or departure city and confirmation number.When to Check In: Online check-in is available after 24 hours prior to flight until 90 minutes before departure time, for passengers with carry-on luggage only.
Southwest Airlines Online Check-in
What You'll Need: Passenger name confirmation number.When to Check In: Online check-in is available after 24 hours prior to flight until one hour before departure time.
United Airlines Online Check-in
What You'll Need: Mileage plus number and password, or one of the following: credit card, eTicket (13-digit number beginning with 016) or confirmation number (6 character number and letter code).When to Check In: Online check-in is available after 24 hours prior to flight until one hour before departure time (or 2 hours for international flights).
U.S Airways Online Check-in
What You'll Need: Check in using your Dividend Miles number and password, confirmation number or flight number.When to Check In: Online check-in is available after 24 hours prior to flight until 90 minutes before departure time.