How to upgrade to first class on united for free?
It's true that upgrading isn't impossible and for United Airlines passengers, there are numerous options to get a better seat. We'll go through all you need to know about the requirements for the upgrade as well as priority to help you get an upgrade on United Airlines. Another method of requesting the upgrade is to contact the reservation line of this company. It can be reached by dialing +1-877-311-7484. The agent who will be there will then be able to inform you about the rules. Then, you can submit your request for an upgrade.