Your fit result

Does Timbuk2 Authority Laptop Backpack Deluxe Medium fit Allegiant Air?

This page compares the bag dimensions we have against one published airline rule, renders the fit to scale, and keeps the caveats visible.

Personal item

Timbuk2 Authority Laptop Backpack Deluxe Medium

Fits

Timbuk2 Authority Laptop Backpack Deluxe Medium fits the published personal-item dimensions for this rule. Still measure the packed bag, including handles and wheels.

Visual sizer

Bag vs airline rule

Fits

Fits. Tightest spare room: 0.1 in.

Height

Spare room +0.1 in

Bag 17.9 in / Rule 18 in

Width

Spare room +1.2 in

Bag 12.8 in / Rule 14 in

Depth

Spare room +0.7 in

Bag 7.3 in / Rule 8 in

info: Personal items not fitting under seat may be charged

Bag: 17.9 x 12.8 x 7.3 in
Rule: 18 x 14 x 8 in
Risk: 8/100
Confidence: high

Margins: length 0.1 in, width 1.2 in, depth 0.7 in.

Bag data

Audited dimensions

Last reviewed: 2026-05-28
Dimension confidence: high
Primary source: manufacturer

Airline rule data

Airline-published rule

Last reviewed: 2026-05-28
Rule confidence: high
Airline rule: Airline baggage page

View bag details View airline rules Suggest correction

Better-fitting alternatives

Personal item

Osprey Daylite Expandable Travel Pack 26+6

Fits

Osprey Daylite Expandable Travel Pack 26+6 fits the published personal-item dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 17 x 13 x 6 in
Rule: 18 x 14 x 8 in
Risk: 8/100
Confidence: high

Margins: length 1 in, width 1 in, depth 2 in.

Bag details

Personal item

CabinZero Classic Cabin Backpack 28L

Fits

CabinZero Classic Cabin Backpack 28L fits the published personal-item dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 15.4 x 11.6 x 7.9 in
Rule: 18 x 14 x 8 in
Risk: 8/100
Confidence: high

Margins: length 2.6 in, width 2.4 in, depth 0.1 in.

Bag details

Personal item

CALPAK Luka 15 inch Laptop Backpack

Fits

CALPAK Luka 15 inch Laptop Backpack fits the published personal-item dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 16 x 12 x 7 in
Rule: 18 x 14 x 8 in
Risk: 8/100
Confidence: high

Margins: length 2 in, width 2 in, depth 1 in.

Bag details