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Southwest Airlines Community

Unable to check in online

New Arrival

I keep getting error 400511206 for no reason.  This happens everytime my companion and I travel from Mexico. One of us can't check in. This time he the companion checked in and I can't????

How can I avoid this in the future. Its nerve racking and causes additional strss when we travel internationally. 


Re: Unable to check in online

Rising Star

Not sure what your issue is, I've never had that coming from Mexico.  Is the other person with the same confirmation number?  Mine is always my companion, and she has a different number so we check-in at the same time.  However, SWA has gotten excellent at checking me in any way (ALister)  And they now, for the past 6 flights, checked my companion in at the same time getting the next number in line.