Basic Economy Baggage Rules

Every row below is taken from the carrier’s own published baggage policy, checked 3 September 2026. Where a carrier publishes fare-specific rules on a page we could not read on the day, we say so rather than publish a figure we have not seen.

Size and allowance are different questions

Almost every carry-on guide answers the first one. A bag is 22 × 14 × 9 in, the limit is 22 × 14 × 9 in, the bag fits. True — and on a cheap fare it can still cost you at the gate, because fitting the box and being entitled to a bin are unrelated permissions.

This is the single most expensive gap in most travelers’ understanding, and it widened as carriers unbundled fares. Below, both questions, separately.

Which carriers charge for the overhead bag

Delta’s published carry-on page draws no distinction between fare classes at all: one full-size carry-on plus one personal item, free, for every passenger. JetBlue’s states that all fares include one carry-on and one personal item with no weight restrictions. Those are the two clearest published positions in the set.

The arithmetic that decides the fare

A basic fare is worth it when the fare gap exceeds the bag fee, and not otherwise. That is a two-line calculation almost nobody does at the point of booking:

• Fare difference between basic and standard, both directions.
• Bag fee for the overhead bag, both directions — and note that carriers commonly price it higher at the airport than online, and higher again at the gate.
• If the bag fee round trip exceeds the fare gap, the standard fare is cheaper and comes with a seat assignment and change rights you would otherwise pay for.

The gate is always the most expensive place to resolve this. Buying the bag at booking is the cheapest, buying it online before check-in is second, and buying it at the door is a penalty price on every carrier that publishes a tiered fee.

If the personal item has to do everything

This is the practical consequence of a basic fare, and it is entirely solvable. The under-seat box is smaller and it varies far more between carriers than the carry-on box does.

United’s published 17 × 10 × 9 in is the constraint that matters: size for that and you clear every other US carrier that publishes a figure. Size for American’s 18 × 14 × 8 in and you are over United’s on all three dimensions. The full personal-item comparison.

A 20 L bag holds three or four days of clothing if you pack deliberately. The trick is not a smaller wardrobe, it is a single well-chosen cube and wearing your bulkiest layer onto the plane.

What happens at the gate

If you board a basic fare with an overhead bag you have not paid for, it is taken at the door and checked, and the fee charged there is the highest one on the carrier’s schedule. That is the outcome the whole page is written to avoid.

Two things to do before you hand any bag over:

• Take out every battery. Power banks and spare lithium cells are prohibited in the hold, and a gate-checked bag goes in the hold. The rule in full.
• Take out anything you need in flight — medication, documents, the laptop. You will not see the bag again until the destination. The complete gate-check guide.