United Fare Classes define how United Airlines structures ticket pricing, flexibility, seat selection, and upgrade eligibility using specific letter codes.
United Airlines uses fare classes ranging from N (Basic Economy) to J/F (full-fare premium cabins). Major tiers include Polaris Business (J, C, D, Z, P), United Premium Plus (O, A, R), and United Economy (Y, B, M, E, U, H, Q, V, W, S, T, L, K, G, N).
Lowest fare available
No seat selection
Limited baggage allowance
No changes or upgrades
Lower ticket prices
Limited flexibility
Reduced mileage earning
Upgrades generally not included
Maximum flexibility
Better upgrade eligibility
Higher mileage earning
Premium Economy cabin
Wider seats and better comfort
Enhanced meals and services
Highest comfort level
Lie-flat seats (on long-haul)
Lounge access and premium services
First Class: F, A
Business Class (Polaris): J, C, D, Z, P
Premium Plus: O, A, R
Economy: Y, B, M, E, U, H, Q, V, W, S, T, L, K, G
Basic Economy: N
Passengers booking Y, B, or M fares with elite status have the best chances for upgrades, especially when upgrade inventory (P, PN, PZ) is available.
Higher fares (Y, B) earn maximum miles
Lower fares (K, G) earn reduced miles
You can check your fare class:
During booking
On your e-ticket
In the United Airlines app
Understanding United Airlines Fare Classes helps you avoid restrictions, maximize upgrades, and choose the best ticket for your travel needs. Whether you’re booking Basic Economy or Polaris Business Class, knowing these fare codes ensures smarter and more cost-effective travel decisions in 2026.