Airline vs airline · Checked October 29, 2026
Allegiant vs United: baggage rules compared
Carry-on, personal item, checked bag and check-in deadlines for Allegiant Air and United Airlines, from each airline's own website.
The short version
- Allegiant's carry-on limit is roomier (22 x 16 x 10 in) than United's (22 x 14 x 9 in), about 22% more space.
- Allegiant charges for a full-size carry-on on its cheapest fare, while United includes a carry-on.
- Allegiant's personal item allowance (18 x 14 x 8 in) is bigger than United's (17 x 10 x 9 in).
| Allegiant | United | |
|---|---|---|
| Carry-on size | 22 x 16 x 10 in / 55 x 40 x 25 cm | 22 x 14 x 9 in / 56 x 35 x 23 cm |
| Carry-on weight | No published limit | No published limit |
| Carry-on on the cheapest fare | Paid extra | Included (Not included in Basic Economy on most routes) |
| Personal item | 18 x 14 x 8 in / 45 x 35 x 20 cm | 17 x 10 x 9 in / 43 x 25 x 22 cm |
| Checked bag size | 203 cm (80 in) in total | 158 cm (62 in) in total |
| Checked bag weight | 22 kg (50 lb) per bag in economy, 45 kg (100 lb) max for any bag | 23 kg (50 lb) per bag in economy, 45 kg (100 lb) max for any bag |
| Online check-in opens | 24 hours before | 24 hours before |
| Bag drop closes | 45 min before | Not published |
| At the gate by | 30 min before | Not published |
| Power banks | Standard 100 Wh / 160 Wh rules | Standard 100 Wh / 160 Wh rules |
Carry-on that fits both
21.7 x 13.8 x 9.1 in (55 x 35 x 23 cm)
The smallest limit on each side
Personal item that fits both
16.9 x 9.8 x 7.9 in (43 x 25 x 20 cm)
The smallest limit on each side
Flying both on one trip? The trip checker shows which airline sets each limit, and the gate card keeps the rules on your phone.
Will your bag fit?
Measure with wheels, handles and pockets included. The order of the sides doesn't matter.
Questions people ask
Is the Allegiant carry-on bigger than United?
Allegiant's carry-on limit is roomier (22 x 16 x 10 in) than United's (22 x 14 x 9 in), about 22% more space.
What carry-on size fits both Allegiant and United?
A bag no bigger than 21.7 x 13.8 x 9.1 in (55 x 35 x 23 cm) fits both carry-on limits, and 16.9 x 9.8 x 7.9 in (43 x 25 x 20 cm) fits both personal item limits. Check weight limits too.