Staff have a bad and unhelpful attitude I had a flight booked from heathrow to cancun which went via Houston. The staff were unhelpful and rude they were more interested in feeding themselves.when we got to Houston for an internal transit it took two hours to get through passport control and almost missed the connecting flight.

Never try calling their customer… Never try calling their customer service, they sound like robots they don't try to help you with the situation at all. They just repeat the same thing over and over again until your realize that they are completely useless. Horrible experience, will never use united again.

Great airline and the website is top notch. United isn't perfect but then again, what airline isn't? I was a faithful flyer based on my travel in a few destinations. Flew ~2-4 one ways each week for a few years. Always booked directly through the website. When you hit status, its great! Unlike some other airlines, they'll never leave a first class seat empty. They'll fill it with those that not only have the most segments, but highest revenue profile (from what I saw). It asks a few more questions than others (Southwest) but once you get into the groove of using it, you barely notice the extra clicks. Not a huge deal. Their mobile apps were sketchy back in 2011-2013 but the recent updates are great! Never hit a problem with it since ~2015.

They need to do better Their level of service and quality of product need to improve. They can't rely on a business model that everyone else is using and perform worse than their competitors. They either need to develop better products and services, provide more value for customers, or else. Horrible experience on my last trip. They cancelled my return ticket saying that I was a no-show for the outbound flight although I sat in my seat in the outbound flight and even gate-checked a bag. They wasted more than two hours of my valuable time during my trip and caused a lot of stress. They didn't even know how this happened. No one apologized to me for their mistakes as of date. Their agents thought I was lying or I was the one who made the mistake. Incredible.

Absolutely horrible experience Absolutely horrible experience. Been in Quito for 2 days now without my bags, after being told our bags were on the flight last night heading to Quito we find out they have not even left Houston. Been on the phone all day and we still have not gotten a decent answer to where or when our bags will arrive. United you are the worst airline and we will never book with you again.