Find lighter options More from Samsonite Similar price range Sort by airline compatibility Browse all 511
Samsonite
Theorym Underseater
$244.99
Description
Introducing Theorym, adapting to the demands of modern travel and built to last. RightHeight™ handle system with multi-stop adjustments allow you to extend the handle to a height that's customized to you. ZipWash™ Removable Lining-Refresh your suitcase after a long trip and extend the life of your investment. StackIt™ Sleeve for easy transport through your travels. Custom designed TPR membrane top provides a comfortable grip. Custom-molded dual spinner wheels create a balanced and smooth rolling experience. Die-cast metal kiss-lock zipper sliders and pullers. Retractable ID tag protects your privacy. Uniquely placed on the front panel. Custom-tooled hardware for a true personalized experience. Recyclex® exterior fabric. YKK zipper pull repair kit. Under seat storage capacities and dimensions vary by airline, visit the Carry-On Guide for more details. If the bag is overstuffed, please check with your airline for more information.
Specifications
Dimensions
18" × 14" × 9"
Weight
5.1 lbs
Type
Softside
Warranty
10 Years
Available Colors
BlackNavy
Features
RightHeight™ handle system with multi-stop adjustments
ZipWash™ Removable Lining
StackIt™ Sleeve for easy transport
Custom designed TPR membrane top
Custom-molded dual spinner wheels
Die-cast metal kiss-lock zipper sliders and pullers
Retractable ID tag
Custom-tooled hardware
YKK zipper pull repair kit
Under seat storage capacities and dimensions vary by airline
✅ Airline Compatibility
This carry-on meets the size and weight requirements for these airlines:
29% weight used
12.6
lbs left for packing
Aegean Air limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 12.6 lbs
23% weight used
17
lbs left for packing
Aer Lingus limits vs this bag:
H: 21.5in
(bag: 18") W: 15.5in
(bag: 14") D: 9.5in
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 17 lbs
23% weight used
17
lbs left for packing
Aeromexico limits vs this bag:
H: 21.5in
(bag: 18") W: 15.7in
(bag: 14") D: 10in
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 17 lbs
33% weight used
10.4
lbs left for packing
Air Asia limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
Air Canada limits vs this bag:
H: 21.5in
(bag: 18") W: 15.5in
(bag: 14") D: 9in
(bag: 9")
Must be able to lift unassisted into overhead bin
33% weight used
10.4
lbs left for packing
Air New Zealand limits vs this bag:
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
23% weight used
17
lbs left for packing
Air Tahiti Nui limits vs this bag:
Empty bag weight Available for packing
5.1 lbs 17 lbs
Alaska Air limits vs this bag:
H: 22in
(bag: 18") W: 14in
(bag: 14") D: 9in
(bag: 9")
Must be able to lift unassisted into overhead bin
Allegiant limits vs this bag:
H: 22in
(bag: 18") W: 16in
(bag: 14") D: 10in
(bag: 9")
Must be able to lift unassisted into overhead bin
23% weight used
17
lbs left for packing
All Nippon Airways limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.8"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 17 lbs
American Airlines limits vs this bag:
H: 22in
(bag: 18") W: 14in
(bag: 14") D: 9in
(bag: 9")
Must be able to lift unassisted into overhead bin
29% weight used
12.6
lbs left for packing
Austrian limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 12.6 lbs
Avelo limits vs this bag:
H: 22in
(bag: 18") W: 14in
(bag: 14") D: 9in
(bag: 9")
Must be able to lift unassisted into overhead bin
Breeze Airways limits vs this bag:
H: 22in
(bag: 18") W: 14in
(bag: 14") D: 9in
(bag: 9")
Must be able to lift unassisted into overhead bin
10% weight used
45.9
lbs left for packing
British Airways limits vs this bag:
H: 22in
(bag: 18") W: 18in
(bag: 14") D: 10in
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 45.9 lbs
29% weight used
12.6
lbs left for packing
Brussels Airlines limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 12.6 lbs
23% weight used
16.9
lbs left for packing
Caribbean Airlines limits vs this bag:
H: 22in
(bag: 18") W: 14in
(bag: 14") D: 9in
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 16.9 lbs
34% weight used
9.9
lbs left for packing
Cathay Pacific limits vs this bag:
H: 22in
(bag: 18") W: 14in
(bag: 14") D: 9in
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 9.9 lbs
33% weight used
10.4
lbs left for packing
Cebu Pacific limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
33% weight used
10.4
lbs left for packing
China Airlines limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
Copa Airlines limits vs this bag:
H: 22in
(bag: 18") W: 14in
(bag: 14") D: 10in
(bag: 9")
Must be able to lift unassisted into overhead bin
Delta limits vs this bag:
H: 22in
(bag: 18") W: 14in
(bag: 14") D: 9in
(bag: 9")
Must be able to lift unassisted into overhead bin
15% weight used
28
lbs left for packing
EasyJet limits vs this bag:
H: 22"
(bag: 18") W: 17.7"
(bag: 14") D: 9.8"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 28 lbs
29% weight used
12.6
lbs left for packing
Egyptair limits vs this bag:
Empty bag weight Available for packing
5.1 lbs 12.6 lbs
29% weight used
12.6
lbs left for packing
El Al limits vs this bag:
H: 22"
(bag: 18") W: 17.7"
(bag: 14") D: 9.8"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 12.6 lbs
33% weight used
10.4
lbs left for packing
Ethiopian limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
33% weight used
10.4
lbs left for packing
EVA Air limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
33% weight used
10.4
lbs left for packing
Fiji Airways limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
29% weight used
12.6
lbs left for packing
Finnair limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 12.6 lbs
23% weight used
17
lbs left for packing
Flair Airlines limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 17 lbs
33% weight used
10.4
lbs left for packing
FlySafair limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
15% weight used
29.9
lbs left for packing
Frontier limits vs this bag:
H: 24in
(bag: 18") W: 16in
(bag: 14") D: 10in
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 29.9 lbs
Garuda Indonesia limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Must be able to lift unassisted into overhead bin
Hawaiian limits vs this bag:
H: 22in
(bag: 18") W: 14in
(bag: 14") D: 9in
(bag: 9")
Must be able to lift unassisted into overhead bin
33% weight used
10.4
lbs left for packing
Hong Kong Airlines limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
23% weight used
17
lbs left for packing
Iberia limits vs this bag:
H: 22"
(bag: 18") W: 15.7"
(bag: 14") D: 9.8"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 17 lbs
23% weight used
16.9
lbs left for packing
Japan Airlines limits vs this bag:
H: 22in
(bag: 18") W: 16in
(bag: 14") D: 10in
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 16.9 lbs
23% weight used
17
lbs left for packing
Jet2 limits vs this bag:
H: 22"
(bag: 18") W: 17.7"
(bag: 14") D: 9.8"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 17 lbs
Jetblue limits vs this bag:
H: 22in
(bag: 18") W: 14in
(bag: 14") D: 9in
(bag: 9")
Must be able to lift unassisted into overhead bin
33% weight used
10.4
lbs left for packing
Jetstar limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
29% weight used
12.6
lbs left for packing
LOT Polish Airlines limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 12.6 lbs
29% weight used
12.6
lbs left for packing
Lufthansa limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 12.6 lbs
33% weight used
10.4
lbs left for packing
Malaysia Airlines limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
33% weight used
10.4
lbs left for packing
Nok Air limits vs this bag:
H: 56in
(bag: 18") W: 36in
(bag: 14") D: 23in
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
23% weight used
17
lbs left for packing
Norwegian limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 17 lbs
33% weight used
10.4
lbs left for packing
Philippine Airlines limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
Porter Airlines limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Must be able to lift unassisted into overhead bin
33% weight used
10.4
lbs left for packing
Qantas Airways limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
33% weight used
10.4
lbs left for packing
Qatar Airways limits vs this bag:
H: 19.7"
(bag: 18") W: 14.6"
(bag: 14") D: 9.8"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
19% weight used
21.4
lbs left for packing
Royal Air Maroc limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.8"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 21.4 lbs
29% weight used
12.6
lbs left for packing
SAS limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 12.6 lbs
33% weight used
10.4
lbs left for packing
Saudia limits vs this bag:
H: 22in
(bag: 18") W: 18in
(bag: 14") D: 10in
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
29% weight used
12.6
lbs left for packing
Scandanavian Airlines limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 12.6 lbs
23% weight used
17
lbs left for packing
Scoot limits vs this bag:
H: 21.3"
(bag: 18") W: 15"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 17 lbs
33% weight used
10.4
lbs left for packing
Singapore Airlines limits vs this bag:
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
29% weight used
12.6
lbs left for packing
South African Airlines limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 12.6 lbs
Southwest Airlines limits vs this bag:
H: 24in
(bag: 18") W: 16in
(bag: 14") D: 10in
(bag: 9")
Must be able to lift unassisted into overhead bin
Spirit limits vs this bag:
H: 22in
(bag: 18") W: 18in
(bag: 14") D: 10in
(bag: 9")
Must be able to lift unassisted into overhead bin
33% weight used
10.4
lbs left for packing
Starlux limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
15% weight used
29.9
lbs left for packing
Sun Country Airlines limits vs this bag:
H: 24in
(bag: 18") W: 16in
(bag: 14") D: 11in
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 29.9 lbs
29% weight used
12.6
lbs left for packing
SWISS limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 12.6 lbs
23% weight used
17
lbs left for packing
TAP Air Portugal limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.8"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 17 lbs
33% weight used
10.4
lbs left for packing
Thai Airways limits vs this bag:
H: 22"
(bag: 18") W: 17.7"
(bag: 14") D: 9.8"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
29% weight used
12.6
lbs left for packing
Turkish Airlines limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 12.6 lbs
United limits vs this bag:
H: 22in
(bag: 18") W: 14in
(bag: 14") D: 9in
(bag: 9")
Must be able to lift unassisted into overhead bin
33% weight used
10.4
lbs left for packing
VietJet Air limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
19% weight used
21.4
lbs left for packing
Vietnam Airlines limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 21.4 lbs
23% weight used
17
lbs left for packing
Virgin Atlantic limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 17 lbs
33% weight used
10.4
lbs left for packing
Virgin Australia limits vs this bag:
H: 22"
(bag: 18") W: 14.2"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
23% weight used
16.9
lbs left for packing
Viva limits vs this bag:
H: 22in
(bag: 18") W: 16in
(bag: 14") D: 10in
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 16.9 lbs
15% weight used
27.9
lbs left for packing
Volaris limits vs this bag:
H: 22in
(bag: 18") W: 16in
(bag: 14") D: 10in
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 27.9 lbs
WestJet limits vs this bag:
H: 22in
(bag: 18") W: 14in
(bag: 14") D: 9in
(bag: 9")
Must be able to lift unassisted into overhead bin
23% weight used
17
lbs left for packing
Wizz Air limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.1"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 17 lbs
33% weight used
10.4
lbs left for packing
ZIPAIR limits vs this bag:
H: 21.7"
(bag: 18") W: 15.7"
(bag: 14") D: 9.8"
(bag: 9")
Empty bag weight Available for packing
5.1 lbs 10.4 lbs
🛒 Where to Buy
Samsonite
$209.99
✈️ Lighter Alternatives
Less weight means more room for packing
IT Luggage
MaXpace 22" Softside UltraLight Carry-On Spinner
0.9 lbs lighter
4.21 lbs
21.5" × 14.8" × 8.5"
$99.99
View Details →
Samsonite
Virtuosa Wheeled Duffel
1.1 lbs lighter
3.97 lbs
21.5" × 11.5" × 10.25"
$159.99
View Details →
Ful
Disney Stamps Hard-sided Spinner 22" Luggage
2.3 lbs lighter
2.8 lbs
22" × 14" × 9.5"
$149.99
View Details →
Osprey
Ozone 2-Wheel Carry-On 40L/21.5"
0.5 lbs lighter
4.6 lbs
21.5" × 14" × 10"
$280
View Details →
🌍 Better Airline Compatibility
This bag fits 74 airlines. Here are options that fit even more:
Samsonite
Virtuosa Wheeled Duffel
Fits 13 airlines
3.97 lbs
21.5" × 11.5" × 10.25"
$159.99
View Details →
CALPAK
Luka Soft-Sided Mini Carry-On Luggage
Fits 4 airlines
5.3 lbs
16" × 14.25" × 9"
$185
View Details →
Quince
Compact Carry-On Hard Shell Suitcase
Fits 4 airlines
5.7 lbs
16.2" × 14.25" × 8.75"
$119.9
View Details →
Thule
Thule Aion
7.16 lbs
21.7" × 13.8" × 9.1"
$369.95
View Details →