18 × 14 × 8 in bag
Common US personal-item size (Spirit, Frontier). Here is how it compares with our manually reviewed airline limits, including wheels and handles.
What this size is designed for
The 18 × 14 × 8 inch box is a common US personal-item target, especially for value carriers that charge separately for an overhead bag. In exact metric terms it is about 45.7 × 35.6 × 20.3 cm, so rounded product labels need careful interpretation.
Best use
This size works best for travellers packing into a compact backpack, tote or soft holdall that must remain beneath the seat. It preserves the free allowance on airlines using this box and can also serve as a deliberately small secondary item on more generous carriers.
Main trade-off
Under-seat space varies by aircraft and seat even when the published allowance does not. A rigid box at the maximum dimensions offers no ability to move around seat supports, while a heavily stuffed soft bag may become larger than the advertised product size.
Measure before flying
Compare against 18 × 14 × 8 inches rather than rounding down to 45 × 35 × 20 cm and assuming equivalence. Pack first, tuck away loose straps, measure the widest points and make sure the bag can remain completely beneath the seat during take-off and landing.
Fits — free
- Jet2FitsFree · 4.7 cm to spare
British AirwaysFitsFree · 4.7 cm to spare
Southwest AirlinesFitsFree · 4.7 cm to spare- Aegean AirlinesFitsFree · 4.7 cm to spare
- TAP Air PortugalFitsFree · 4.4 cm to spare
IberiaFitsFree · 4.4 cm to spare- Aer LingusFitsFree · 3.7 cm to spare
LOT Polish AirlinesFitsFree · 2.7 cm to spare
LufthansaFitsFree · 2.7 cm to spare
Turkish AirlinesFitsFree · 2.7 cm to spare
NorwegianFitsFree · 2.7 cm to spare
Pegasus AirlinesFitsFree · 2.7 cm to spare- SWISSFitsFree · 2.7 cm to spare
- Austrian AirlinesFitsFree · 2.7 cm to spare
- SAS ScandinavianFitsFree · 2.7 cm to spare
- FinnairFitsFree · 2.7 cm to spare
Air CanadaFitsFree · 2.7 cm to spare- Air New ZealandFitsFree · 2.7 cm to spare
Air SerbiaFitsFree · 2.7 cm to spare
EmiratesFitsFree · 1.7 cm to spare
Qatar AirwaysFitsFree · 1.4 cm to spare
Fits — paid / add-on
- Sun CountryFitsPaid · 5.4 cm to spare
easyJetFitsPaid · 4.7 cm to spare- Spirit AirlinesFitsPaid · 4.7 cm to spare
- Frontier AirlinesFitsPaid · 4.7 cm to spare
- Allegiant AirFitsPaid · 4.7 cm to spare
- TransaviaFitsPaid · 4.4 cm to spare
Wizz AirFitsPaid · 2.7 cm to spare- EurowingsFitsPaid · 2.7 cm to spare
Tight — risky
American AirlinesTight — riskyFree · 0.4 cm to spare- JetBlueTight — riskyFree · 0.4 cm to spare
- Alaska AirlinesTight — riskyFree · 0.4 cm to spare
- Hawaiian AirlinesTight — riskyFree · 0.4 cm to spare
Etihad AirwaysTight — riskyFree · 0.4 cm to spare
Singapore AirlinesTight — riskyFree · 0.4 cm to spare
QantasTight — riskyFree · 0.4 cm to spare- JetstarTight — riskyFree · 0.4 cm to spare
- Virgin AustraliaTight — riskyFree · 0.4 cm to spare
Virgin AtlanticTight — riskyFree · 0.4 cm to spare
Doesn't fit
RyanairDoesn't fitOver the limit- VuelingDoesn't fitOver the limit
- VoloteaDoesn't fitOver the limit
- flydubaiDoesn't fitOver the limit
- Air ArabiaDoesn't fitOver the limit
TUI AirwaysDoesn't fitOver the limit
KLMDoesn't fitOver the limit
Delta Air LinesDoesn't fitOver the limit
United AirlinesDoesn't fitOver the limit
Air FranceDoesn't fitOver the limit- ITA AirwaysDoesn't fitOver the limit
- JetSMARTDoesn't fitOver the limit
- FlybondiDoesn't fitOver the limit
FAQ
Which airlines accept a 18 × 14 × 8 in bag?+
A 18 × 14 × 8 in bag fits 21 airlines for free, including Jet2, British Airways, Southwest Airlines. It's a tight fit on 10 and over the limit on 13.
Is 18 × 14 × 8 in a carry-on or a personal item size?+
18 × 14 × 8 in is a US-style measurement. Larger sizes like 22×14×9 in are full carry-ons; smaller ones like 18×14×8 in are personal items that fit under the seat.