Briggs & Riley Baseline Global 21" Carry-On Expandable Spinner on Allegiant Air
Bag 21×15×9" vs sizer 22×14×9"
No — it's oversized.
The verdict, explained
At 21x15x9", the Briggs & Riley Baseline Global 21" Carry-On Expandable Spinner exceeds Allegiant Air's 22x14x9" carry-on sizer — it is 1" too big on its second-longest side. Even with the straps pulled tight, the overage is too large to count on squeezing it in. Expect it to be turned away at the gate and gate-checked. On Allegiant Air: Personal item free; carry-on is a paid add-on. It is too large for Allegiant Air's under-seat personal-item space, so it has to go overhead or be checked.
| Axis | Bag | Sizer | Margin |
|---|---|---|---|
| Length | 21" | 22" | +1" |
| Width | 15" | 14" | -1" |
| Height | 9" | 9" | +0" |
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Frequently asked
Does the Briggs & Riley Baseline Global 21" Carry-On Expandable Spinner fit Allegiant Air's carry-on size limit?
No. The Briggs & Riley Baseline Global 21" Carry-On Expandable Spinner is larger than Allegiant Air's 22x14x9" carry-on limit and will likely be gate-checked.
What is Allegiant Air's carry-on size limit?
Allegiant Air allows carry-on bags up to 22x14x9" (length x width x height), including wheels and handles. Personal item free; carry-on is a paid add-on.
Can the Briggs & Riley Baseline Global 21" Carry-On Expandable Spinner be a personal item on Allegiant Air?
No. At 21x15x9" it is too big for Allegiant Air's under-seat personal-item space (16x15x7"); it travels as a carry-on instead.
The full verdict on the Briggs & Riley Baseline Global 21" Carry-On Expandable Spinner — every airline sizer it clears, and the ones it doesn't.
Bags that clear Allegiant Air's sizer
Alternatives that fit the 22×14×9" limit outright.
The Briggs & Riley Baseline Global 21" Carry-On Expandable Spinner on other airlines
Same bag, different sizers — check before a connecting or return flight.
- ✕Delta Airlines
- ✕American Airlines
- ✕United Airlines
- ✕JetBlue
- ✓Southwest Airlines
- ✕Alaska Airlines
- ✓Spirit Airlines
- ✓Frontier Airlines
- ✕Hawaiian Airlines
- ✓Sun Country Airlines
- ✓Ryanair
- ✓easyJet
- ✓Wizz Air
- ✓British Airways
- ✓Lufthansa
- ✕Air France
- ✕KLM
- ✓Iberia
- ≈Vueling
- ✓Eurowings
- ✓Norwegian
- ≈TAP Air Portugal
- ✓SAS Scandinavian
- ✓SWISS
- ✓Austrian Airlines
- ✓Aer Lingus
- ✓Finnair
- ✕ITA Airways
- ✓Brussels Airlines
- ✓LOT Polish Airlines
- ✓Transavia
- ≈Volotea