An upgrade from economy, the "W" fare class, to Polaris business class requires 40 PlusPoints, while lower-priced fare classes could require double that amount to get bumped on long-haul flights.

Frequent flyer miles can be your ticket to free flights, cabin upgrades or elite status, which can provide you with big perks ...

United MileagePlus members and cardholders can access a special 24-hour award flight sale every day this week.

I recently booked basic economy domestic flights with United and Delta for similar prices. Each ride was about 4 ½ hours, but the two bookings felt like completely different classes to me.

A few days later, I took a $175 basic economy flight with Delta from Salt Lake City to NYC. Both flights were 4 ½ hours, but they felt like different classes.

American and United have started selling cheaper “basic economy” fares as they battle discount airlines for the most budget-conscious travelers. American announced Tuesday that it began ...

A round-trip fare for Christmas week — Dec. 20 through Dec. 27 — lists a basic economy fare of about $1,400, though it falls to about $340 round trip after the holidays.

I recently booked basic economy domestic flights with United and Delta for similar prices. Each ride was about 4 ½ hours, but the two bookings felt like completely different classes to me.