Thule Aion Travel Backpack 28L × United Airlines personal item
No.
Bag 18.5 x 11 x 9.1 in · Rule 17 x 10 x 9 in · medium confidence
Bag reviewed 2026-05-28 · Rule reviewed 2026-05-28
Fit proof
Height
Over 1.5 in
Width
Over 1 in
Depth
Over 0.1 in
Rendered to scale from the reviewed dimensions above. Packed shape and gate enforcement can still change the outcome.
Why this answer
Thule Aion Travel Backpack 28L is larger than the published personal-item dimensions. Pick a smaller alternative for this airline rule.
The selected rule is 17 x 10 x 9 in and the bag record is 18.5 x 11 x 9.1 in.
Next step
Thule Aion Travel Backpack 28L is not a strong match for United Airlines's personal item rule. Use the alternatives below first, then review merchant dimensions before buying.
Fits this rule with 0.2 inches of tightest margin.
0.2 in spare on width, the tightest side
16.5 x 9.8 x 6.1 in
Fits this rule with 0 inches of tightest margin.
Exact limit at the limit on height
17 x 10 x 7.5 in
Fits this rule with 0 inches of tightest margin.
Exact limit at the limit on depth
14.5 x 7.5 x 9 in