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Southwest Airlines Community

Unable to check in online

Explorer C

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

Aviator C

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.