Your fit result

Does Thule Aion Travel Backpack 28L fit Alaska Airlines?

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

Carry-on

Thule Aion Travel Backpack 28L

Risky

Thule Aion Travel Backpack 28L is over the published carry-on dimensions, but the soft construction may make it a borderline option if lightly packed. Treat this as a fee-risk result.

Fit proof

3 in tightest spare room

Tight fit

Tight fit. length spare room 3.5 inches, width spare room 3 inches, depth over by 0.1 inches.

Rendered to scale

Tight fit. Tightest spare room: 3 in.

Height

Spare room +3.5 in

Bag 18.5 in / Rule 22 in

Width

Spare room +3 in

Bag 11 in / Rule 14 in

Depth

Over by 0.1 in

Bag 9.1 in / Rule 9 in

Data status

Audited dimensionsAirline-published rule

Rendered from the dimensions shown here. Airline staff and packed shape can still affect the real-world outcome.

Fit is rendered from verified dimensions using a shape profile.

Bag: 18.5 x 11 x 9.1 in
Rule: 22 x 14 x 9 in
Risk: 48/100
Confidence: high

Margins: length 3.5 in, width 3 in, depth -0.1 in.

Main issue: depth by 0.1 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 page View airline rules Suggest correction

Better-fitting alternatives

Carry-on

BAGSMART Roamer Expandable 20 inch Carry On Luggage

Fits

BAGSMART Roamer Expandable 20 inch Carry On Luggage fits the published carry-on dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 21.7 x 13.9 x 9 in
Rule: 22 x 14 x 9 in
Risk: 8/100
Confidence: high

Margins: length 0.3 in, width 0.1 in, depth 0 in.

Bag page Fit page

Carry-on

Monos Carry-On

Fits

Monos Carry-On fits the published carry-on dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 22 x 14 x 9 in
Rule: 22 x 14 x 9 in
Risk: 8/100
Confidence: high

Margins: length 0 in, width 0 in, depth 0 in.

Bag page Fit page

Carry-on

Aer Carry-On

Fits

Aer Carry-On fits the published carry-on dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 21.7 x 14 x 9 in
Rule: 22 x 14 x 9 in
Risk: 8/100
Confidence: high

Margins: length 0.3 in, width 0 in, depth 0 in.

Bag page Fit page