If you purchased a basic economy ticket for United, it should be clearly indicated on your ticket or confirmation email. Look for the fare code - basic economy code for United is N. Are United Airlines' Mileage Plus points valuable enough to pay $50-100 extra for a long trip?
United Airlines Carry-on Allowance1 Standard Carry-on Bag: Standard Economy: FREE. Basic Economy: No bag included (excluding South America, transatlantic/transpacific flights where a standard carry-on is included*)
On international routes, economy passengers generally receive one or two free checked bags, depending on the destination. Here's a summary of what you can expect to pay for baggage fees so long as your bag adheres to United's size and weight requirements.
R - First Class Suite or Supersonic (discontinued) S - Economy/Coach. T - Economy/Coach Discounted. U - Shuttle Service (no reservation needed/seat guaranteed) V - Economy/Coach Discounted.
What to Do After Online Check-In. Once you receive your electronic boarding pass, you can head straight to security if you're traveling carry-on only. If you're checking a bag, you'll still need to stop by the ticketing area at the airport. Look for special “bag drop” lines that bypass longer check-in lines.
For a short-haul flight where you are only taking hand luggage, checking in online saves a lot of time and is therefore much better than checking in at the airport. If, on the other hand, you have to check in bulky luggage, it is better to use the classic check-in at the airport for security reasons.
Does basic economy get a carry-on on United? Unlike other major carriers that offer free carry-on baggage regardless of fare class, United does not allow carry-on bags that need to be stored overhead for basic economy fares, unless you're flying to South America or are taking a transpacific or transatlantic flight.
A backpack can be your carry on if it meets your airline's carry on size limits. A personal item is a smaller, secondary bag, which you'll stow under the seat in front of you. Read Carry Ons vs. Personal Items for more on the differences between the two.