United Airlines Sizer Limits Overview
Major CarrierPersonal Item
Must fit under the seat in front. Limit 17 x 10 x 9 inches. This is the ONLY bag allowed on Basic Economy tickets.
Carry-On Bag
Must fit overhead. BASIC ECONOMY tickets do NOT include a carry-on bag (unless trans-Atlantic/Pacific).
Checked Bag
Standard checked bag limits apply: 62 linear inches, 50 lbs. Business/First class allows 70 lbs (32 kg).
Under-seat Personal Item
Too Large (Airline max is 17x10x9 in)
Overhead Cabin Carry-On
Fits overhead bin free
Checked Hold Bag
Complies with standard checked limits
Detailed Luggage Guidelines
Here is the full breakdown of size sizer dimensions, weight caps, and carry-on/checked bag policies.
| Luggage Type | Maximum Size (Inches) | Maximum Size (Metric) | Weight Cap | Standard Cost |
|---|---|---|---|---|
| Personal Item | 17 x 10 x 9 in | 43 x 25 x 22 cm | No strict limit | FREE (Fits under seat) |
| Carry-On Bag | 22 x 14 x 9 in | 56 x 35 x 23 cm | No limit (must lift) | Free for standard economy and higher |
| 1st Checked Bag | Max 62 linear inches | Max 157 linear cm | Max 50 lbs | $30 USD |
If flying United Basic Economy, you cannot bring a carry-on. Buy your ticket with a United Explorer credit card to bypass this rule and get a free carry-on + free checked bag for your group.
Best bag selection: United has a slightly narrower personal item sizer (17x10x9"). Use a dedicated commuter tote or brief bag rather than a bulging backpack.
Baggage Penalty & Excess Fees
Exceeding either sizer dimensions or weight caps will result in extra charges at check-in or boarding gates.
| Fee Category | Domestic US Rate | Details |
|---|---|---|
| 1st Checked Bag Fee | $30 | $35 for 1st bag ($30 if prepaid online), $45 for 2nd bag ($40 online). |
| 2nd Checked Bag Fee | $40 | Standard rate for economy passengers. |
| Overweight Charge | $100 | Applies if the bag exceeds standard weight caps (e.g. 50 lbs / 23 kg). |
| Oversized Charge | $200 | Applies if the bag linear dimensions exceed 62 inches. |
For more details or to pre-book excess luggage allowances online, visit the official United Airlines Baggage Page.