K - Economy/Coach Discounted. L - Economy/Coach Discounted. M - Economy/Coach Discounted – Usually an upgradable fare to Business. N - Economy/Coach Discounted.
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Upgrade-eligible fare classesPassengers with tickets in the W fare class or higher can use 40 PlusPoints to upgrade to Polaris business class on eligible international flights. However, tickets booked in S, T, L, K or G fare classes require 80 points for the upgrade.
On flights that have premium economy seats, flyers who have booked a Premium Plus seat have first priority for upgrades over everyone else. Only once those upgrade requests have cleared will United begin to process upgrades from those in economy.
A quick easy way is to go into your reservation on the United website or app and try to select a seat. If you are Basic Economy, it won't let you select a seat or have a seat assignment in advance unless you purchased one.
For all fare classes, except Basic Economy, you will be able to pick your seat or change your seat assignment. If you have a Basic Economy ticket, you're able to purchase a seat assignment during booking and up until check-in opens. Learn more about Basic Economy restrictions.
Keep in mind that upgrading to Economy Plus will only net you more legroom, guaranteed in-seat power access and a seat closer to the front of the plane; it will not get you an additional baggage allowance.
Economy Plus and upgrades: Travelers with Basic Economy fares are only eligible to purchase Economy Plus seating at check-in and are not eligible to purchase premium cabin upgrades, use their Economy Plus subscription benefits or purchase United Travel Options packages.
Instant upgrades for all Premier members on Y and B full-fare Economy tickets and for Premier 1K® members on M fares are available on all flights that are eligible for Complimentary Premier Upgrades.
Make a Skip Waitlist request during booking by selecting “Available only and Skip Waitlist” during the pick your view step when making a PlusPoints upgrade.
United Airlines offers a place for passengers to relax before or after their flight. The United Club? lounge is available to United Club members, Star Alliance Gold members, passengers traveling in United Polaris business class or United first class, or passengers who purchase a one-time pass.