Thule

Aion Travel Backpack 28L

Official source uses height oriented dimensions; fit convention stores longest side as length

Dimensions: 18.5 x 11 x 9.1 in
Capacity: 28 L
Weight: 2.7 lb
Last reviewed: 2026-05-28

Audited dimensions

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Bag data

Audited dimensions

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

Fit by airline

Airline fit results

Carry-on

Thule Aion Travel Backpack 28L

Fits

Thule Aion Travel Backpack 28L fits the published carry-on dimensions for this rule. Still measure the packed bag, including handles and wheels.

Fit proof

0.7 in tightest spare room

Fits

Fits. length spare room 3.2 inches, width spare room 2.8 inches, depth spare room 0.7 inches.

Rendered to scale

Fits. Tightest spare room: 0.7 in.

Height

Spare room +3.2 in

Bag 18.5 in / Rule 21.7 in

Width

Spare room +2.8 in

Bag 11 in / Rule 13.8 in

Depth

Spare room +0.7 in

Bag 9.1 in / Rule 9.8 in

Data status

Audited dimensionsSource-linked 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: 21.7 x 13.8 x 9.8 in
Risk: 8/100
Confidence: medium

Margins: length 3.2 in, width 2.8 in, depth 0.7 in.

Bag page Fit page

Personal item

Thule Aion Travel Backpack 28L

Does not fit

Thule Aion Travel Backpack 28L is larger than the published personal-item dimensions. Pick a smaller alternative for this airline rule.

Bag: 18.5 x 11 x 9.1 in
Rule: 17.7 x 13.8 x 7.9 in
Risk: 78/100
Confidence: medium

Margins: length -0.8 in, width 2.8 in, depth -1.2 in.

Main issue: length by 0.8 in, depth by 1.2 in.

Bag page Fit page

Carry-on

Thule Aion Travel Backpack 28L

Fits

Thule Aion Travel Backpack 28L fits the published carry-on dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 18.5 x 11 x 9.1 in
Rule: 21.7 x 15.7 x 9.1 in
Risk: 8/100
Confidence: medium

Margins: length 3.2 in, width 4.7 in, depth 0 in.

Bag page Fit page

Carry-on

Thule Aion Travel Backpack 28L

Fits

Thule Aion Travel Backpack 28L fits the published carry-on dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 18.5 x 11 x 9.1 in
Rule: 21.7 x 15.7 x 9.1 in
Risk: 8/100
Confidence: medium

Margins: length 3.2 in, width 4.7 in, depth 0 in.

Bag page Fit page

Carry-on

Thule Aion Travel Backpack 28L

Fits

Thule Aion Travel Backpack 28L fits the published carry-on dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 18.5 x 11 x 9.1 in
Rule: 21.7 x 13.8 x 9.8 in
Risk: 8/100
Confidence: medium

Margins: length 3.2 in, width 2.8 in, depth 0.7 in.

Bag page Fit page

Carry-on

Thule Aion Travel Backpack 28L

Fits

Thule Aion Travel Backpack 28L fits the published carry-on dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 18.5 x 11 x 9.1 in
Rule: 21.7 x 13.8 x 9.8 in
Risk: 8/100
Confidence: medium

Margins: length 3.2 in, width 2.8 in, depth 0.7 in.

Bag page Fit page

Carry-on

Thule Aion Travel Backpack 28L

Fits

Thule Aion Travel Backpack 28L fits the published carry-on dimensions for this rule. Still measure the packed bag, including handles and wheels.

Bag: 18.5 x 11 x 9.1 in
Rule: 21.7 x 13.8 x 9.8 in
Risk: 8/100
Confidence: medium

Margins: length 3.2 in, width 2.8 in, depth 0.7 in.

Bag page Fit page

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.

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 page Fit page