Allegiant Air

Allowed dimensions: 55x40x25 cm

The context in a few words

On the regional low-cost map, Allegiant Air stands out. The brand is built on rock-bottom fares and a stricter-than-average baggage policy — something to factor in before packing the bag.

At 55x40x25 cm, the grid lines up with prevailing IATA references. Most off-the-shelf carry-on cases are compatible out of the box.

One useful benchmark: on Allegiant Air, cabin baggage typically fits the overhead bin of an Airbus A320 or Boeing 737, the most common types on their network. The 55x40x25 cm format matches standard bin dimensions, no more. Even seemingly compatible extended cases are best avoided.

Practical note: skip the expandable soft duffels — they tend to bulge at one corner. A properly sized hard case, or an underseat bag within spec, remains the safest combination.

Frequent-flyer trick on Allegiant Air: use the personal item as a "stealth second carry-on". A compact backpack packed sensibly can carry a meaningful share, provided it respects underseat dimensions. That's often where a zero-fee trip turns into a forced upgrade.

Which bag for Allegiant Air?

Picking a bag for Allegiant Air mostly comes down to one rule: stay clearly within the published format. The recommendations below match that brief — properly sized, no oversize-by-a-corner surprises.