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Does the Delsey Helium Aero Carry-On fit Southwest Airlines as a carry-on?

Updated 2026-09-24. Researched from airline pages and published specifications.

Quick answerYes. The Delsey Helium Aero Carry-On measures 21 x 14 x 10 inches with wheels and handles by its listing, within Southwest Airlines’s 24 x 16 x 10 in carry-on limit, exactly at the limit on its tightest side. Expanded, it is deeper and may not fit.

Limits change; confirm with your airline before you fly. Every figure here links to the airline page it came from.

DELSEY PARIS Helium Aero Hardside Expandable Luggage with Spinner Wheels

DELSEY PARIS Helium Aero Hardside Expandable Luggage with Spinner Wheels

21 x 14 x 10 in, wheels and handles included; 8.52 lb listed

Fits Southwest by its wheels-included listing size, exactly at the limit.

$149.99  Check price on Amazon

Prices change often.

Yes, it fits on Southwest Delsey Helium Aero Carry-On: 21 x 14 x 10 in with wheels (21 x 14 x 10 in) vs limit 24 x 16 x 10 in
Longest side (height)+3 in
Middle side (width)+2 in
Shortest side (depth)+0 in

How was this checked?

The bag's three sides come from its own listing, which states the size includes wheels and handles. Both sets of numbers are sorted largest first and compared side by side in inches, the unit Southwest publishes. Exactly on the limit counts as a fit; a tenth over does not. Southwest states 24 (length) x 16 (width) x 10 (height) inches.

Price when checked: $149.99, listed weight 8.52 lb. This bag is expandable; the verdict is for the zipped, unexpanded size.

Does the Delsey Helium Aero Carry-On fit other airlines?

Airlinecarry-on limitVerdictTightest side
AAAmerican 22 x 14 x 9 in TOO BIG -1 in
DLDelta 22 x 14 x 9 in TOO BIG -1 in
UAUnited 22 x 14 x 9 in TOO BIG -1 in
WNSouthwest 24 x 16 x 10 in FITS exactly at limit
ASAlaska 22 x 14 x 9 in TOO BIG -1 in
B6JetBlue 22 x 14 x 9 in TOO BIG -1 in
NKSpirit 22 x 18 x 10 in FITS exactly at limit
F9Frontier 24 x 16 x 10 in FITS exactly at limit
G4Allegiant 22 x 16 x 10 in FITS exactly at limit
HAHawaiian 22 x 14 x 9 in TOO BIG -1 in
MXBreeze 22 x 14 x 9 in TOO BIG -1 in
ACAir Canada 55 x 40 x 23 cm TOO BIG -2.4 cm
WSWestJet 56 x 36 x 23 cm TOO BIG -2.4 cm
BABritish Airways check the airline CHECK AIRLINE
LHLufthansa 55 x 40 x 23 cm TOO BIG -2.4 cm
AFAir France 55 x 35 x 25 cm TOO BIG -0.6 cm
KLKLM 55 x 35 x 25 cm TOO BIG -0.6 cm
LXSWISS 55 x 40 x 23 cm TOO BIG -2.4 cm
FRRyanair 55 x 40 x 20 cm TOO BIG -5.4 cm
U2easyJet 56 x 45 x 25 cm TOO BIG -0.4 cm
W6Wizz Air 55 x 40 x 23 cm TOO BIG -2.4 cm
EIAer Lingus 55 x 40 x 24 cm TOO BIG -1.4 cm
FIIcelandair 55 x 40 x 20 cm TOO BIG -5.4 cm
VSVirgin Atlantic 56 x 36 x 23 cm TOO BIG -2.4 cm
TKTurkish 55 x 40 x 23 cm TOO BIG -2.4 cm
EKEmirates 55 x 38 x 22 cm TOO BIG -3.4 cm
QRQatar 50 x 37 x 25 cm TOO BIG -3.3 cm
QFQantas 56 x 36 x 23 cm TOO BIG -2.4 cm
SQSingapore 115 cm total FITS +0.7 cm

Which other carry-ons fit Southwest?

BagSize with wheelsSouthwestPrice
Amazon Basics 21" Hardside Spinner21.7 x 14.8 x 10FITS$63.70
Wrangler 22" Hardside Spinner22 x 14 x 9.5FITS$54.09
Travelpro Maxlite 5 20" Spinner22 x 14 x 9FITS$160.00
American Tourister Stratum 3.0 Carry-On22 x 15 x 9.5FITS$71.99
Samsonite Freeform Carry-On Spinner23 x 15 x 10FITS$129.99
Samsonite Omni PC Carry-On22 x 15 x 9.5FITS$112.79
LEVEL8 Zipperless Aluminum Frame Carry-On22 x 14.9 x 9FITS$206.99
CENSIEN 20" Carry-On21.46 x 13.78 x 8.66FITS$74.99
Travelpro Maxlite 5 21" Spinner23 x 14.5 x 9FITS$160.00
Travelpro Platinum Elite 21" Spinner23.5 x 14.5 x 9FITS$390.00
Travelpro Platinum Elite Hardside Carry-On23 x 14.5 x 9.5FITS$325.74
LUGGEX All-Aluminum Carry-On21.7 x 15 x 9.4FITS$199.99
ASYSUIT 20" Aluminum Zipperless Carry-On21.3 x 13.8 x 8.3FITS$189.95
SwissGear Sion Softside Carry-On22.75 x 14.25 x 10.25TOO BIG$130.00

Carry-ons that fit Southwest

Frequently asked questions

Does the Delsey Helium Aero Carry-On fit Southwest’s carry-on sizer?

By the numbers, yes: its listing gives 21 x 14 x 10 inches including wheels and handles against Southwest’s published 24 x 16 x 10 in. The tightest side has no room at all, so avoid overstuffing the front pocket and keep the expansion zip closed. Limits change; confirm with Southwest before you fly.

How much does the Delsey Helium Aero Carry-On weigh?

Its listing gives 8.52 lb empty. Southwest’s page states no carry-on weight limit, but you must be able to lift the bag into the bin yourself.

Which other airlines does the Delsey Helium Aero Carry-On fit?

Against the published carry-on limits we track, it also fits Spirit, Frontier, and is too big for American, Delta, United, Alaska, JetBlue, Air Canada, Lufthansa. The full table covers every airline with a published limit.

Researched, not professional advice. The verdict uses the bag's own listing size and the airline's own published limit; neither was measured in person.