United Airlines Baggage Allowance: Australia Guide
Quick Reference
United Baggage Allowance: Your Key Numbers
Economy carry-on
1 carry-on bag plus 1 personal item on every fare, including Basic Economy on Australia routes. Max carry-on: 56 x 35 x 23 cm. Max personal item: 43 x 25 x 22 cm.
Checked baggage from Australia
Standard Economy: 1 free bag, 23 kg. Basic Economy: no free bag, fee applies. Premium Plus and Polaris (standard/flexible): 2 free bags, 32 kg each.
Biggest gotcha
United's new 2026 base fare tier in Premium Plus and Polaris only includes 1 free checked bag, not 2. Check the baggage line at checkout, not just the cabin name.
Basic Economy exception
Domestic US Basic Economy drops the carry-on entirely. Long-haul Pacific Basic Economy to Australia keeps the full-size carry-on, so Australian flyers are not caught out here.
Max single bag
23 kg standard, up to 45 kg with overweight fees, and 158 cm total linear dimensions (length plus width plus height) on every fare and cabin.
Overweight fee from Australia
Around USD 100 for bags between 23 kg and 32 kg. Around USD 200 for bags between 32 kg and 45 kg. Bags over 45 kg are not accepted as standard checked baggage.
United Airlines baggage allowance from Australia: carry-on is 1 bag plus 1 personal item on every fare, including Basic Economy, up to 56 x 35 x 23 cm for the carry-on and 43 x 25 x 22 cm for the personal item. Standard Economy includes 1 free checked bag up to 23 kg, while Basic Economy charges for the first bag. Premium Plus and Polaris business class include 2 free checked bags at 32 kg each on standard and flexible fares, but United's new 2026 base fare tier in both cabins only includes 1 free bag.
United Airlines flies direct between Australia and the United States from four gateway cities: Sydney, Melbourne, Brisbane and, seasonally, Adelaide. Sydney also connects direct to Houston. The most important thing to understand about United's baggage allowance from Australia is that it is set by fare type and cabin rather than by route, and 2026 brought a significant change to how many free bags Premium Plus and Polaris business class passengers actually get.
This guide covers United's cabin baggage dimensions and weight limits, checked baggage by fare type, the 2026 Premium Plus and Polaris fare tier changes, excess and overweight fees, and which suitcase works best for each cabin. Figures are drawn from United's published baggage policy and cross-checked against current industry reporting, verified July 2026.
United Cabin Baggage Dimensions and Weight Limits
Every United fare between Australia and the United States includes one personal item, which must fit under the seat in front of you. The maximum size is 43 x 25 x 22 cm, covering a laptop bag, handbag or small backpack.
Standard Economy, Premium Plus and Polaris fares also include a full-size carry-on bag up to 56 x 35 x 23 cm including handles and wheels. United does not publish a weight limit for cabin baggage, only the size limit above.
| Cabin or fare | Carry-on bags | Max carry-on size | Max personal item size |
|---|---|---|---|
| Standard Economy | 1 carry-on bag + 1 personal item | 56 x 35 x 23 cm | 43 x 25 x 22 cm |
| Basic Economy (Australia routes) | 1 carry-on bag + 1 personal item | 56 x 35 x 23 cm | 43 x 25 x 22 cm |
| Premium Plus (all tiers) | 1 carry-on bag + 1 personal item | 56 x 35 x 23 cm | 43 x 25 x 22 cm |
| Polaris business class (all tiers) | 1 carry-on bag + 1 personal item | 56 x 35 x 23 cm | 43 x 25 x 22 cm |
Carry-on and personal item sizes are the same across every cabin. What changes by fare and cabin is the number of free checked bags, not the cabin baggage allowance.
Source: united.com baggage policy pages, cross-checked against current airline industry reporting - verified July 2026
!
Basic Economy is different on Pacific routes On domestic US routes, Basic Economy drops the free carry-on entirely and only allows a personal item. On long-haul Pacific routes between Australia and the United States, Basic Economy still includes the full-size carry-on bag as well as the personal item. Australian travellers booking the cheapest Economy fare are not restricted to a personal item only, the way domestic US flyers are.
United Checked Baggage Allowance by Fare (Australia Routes)
The table below shows United's checked baggage allowance for flights between Australia and the United States, by fare type and cabin. Weight and size limits are the same regardless of which Australian gateway city you fly from.
| Cabin | Fare tier | Free checked bags | Max weight per bag |
|---|---|---|---|
| Economy | Standard Economy | 1 bag | 23 kg |
| Economy | Basic Economy | 0 bags, fee applies | 23 kg (if purchased) |
| Premium Plus | Standard or flexible | 2 bags | 32 kg each |
| Premium Plus | Base (new 2026 tier) | 1 bag | 32 kg |
| Polaris business class | Standard or flexible | 2 bags | 32 kg each |
| Polaris business class | Base (new 2026 tier) | 1 bag | 32 kg |
Every checked bag, regardless of cabin or fare, must stay within 158 cm total linear dimensions (length plus width plus height). Bags that exceed the weight or size limit above incur the overweight and oversize fees covered further down this guide.
Source: united.com baggage policy pages, cross-checked against current airline industry reporting - verified July 2026
United's 2026 Premium Cabin Fare Changes
United rolled out a new tiered fare structure across Premium Plus and Polaris business class in 2026. Both cabins are now sold as base, standard or flexible fares, and the tier you book changes your baggage allowance as well as your seat selection and change flexibility.
Standard and flexible fares in both cabins are largely unchanged from what long-haul Pacific flyers are used to, including two free checked bags at 32 kg each. The new base fare strips this back to one free checked bag in both Premium Plus and Polaris, alongside paid seat selection and no changes or refunds.
i
Check the baggage line, not just the cabin name The base fare tier is still rolling out across United's network through 2026, so it may not yet appear on every route between Australia and the United States. Before assuming a Premium Plus or Polaris fare includes two free bags, check the baggage allowance shown at checkout, since the cheapest fare in either cabin may only include one.
United Excess and Overweight Baggage Fees
United applies separate fees for bags that are too heavy and bags that are too large, and both can apply to the same bag if it breaches both limits. Fees are charged in US dollars and converted to Australian dollars at your card provider's exchange rate.
| Bag condition | Weight or size | Approximate fee |
|---|---|---|
| Standard checked bag | Up to 23 kg, up to 158 cm combined | Included, or first-bag fee applies on Basic Economy |
| Second checked bag | Up to 23 kg | Around USD 100 |
| Overweight, tier one | 23 kg to 32 kg | Around USD 100 |
| Overweight, tier two | 32 kg to 45 kg | Around USD 200 |
| Maximum weight | Above 45 kg | Not accepted as standard checked baggage |
Musical instruments are the one exception to the 45 kg ceiling, and United will accept these up to 75 kg in a hard case. Assistive devices such as wheelchairs and mobility aids are carried free of charge and do not count against your checked bag allowance.
Source: united.com baggage policy pages, cross-checked against current airline industry reporting - verified July 2026
What Your Allowance Actually Gets You
United packing weight reference - Australia routes
Subtract your suitcase weight from your allowance first. A 67 cm checked case typically weighs 3.0 to 3.5 kg, a 76 cm checked case 3.8 to 4.8 kg.
| Fare or allowance | Usable weight after a 76 cm case (4 kg) | Usable weight after a 67 cm case (3.2 kg) | Rating |
|---|---|---|---|
| Standard Economy (23 kg) | 19 kg, workable for up to 10 days | 19.8 kg | Manageable |
| Basic Economy (paid bag, 23 kg) | 19 kg, same allowance once purchased | 19.8 kg | Manageable |
| Premium Plus base (32 kg, 1 bag) | 28 kg, generous for most trip lengths | 28.8 kg | Generous |
| Premium Plus / Polaris standard (2 x 32 kg) | 56 kg across 2 bags, more than enough for any length of trip | 57.6 kg | Very generous |
Common item weights: T-shirt 200 g, jeans 700 g, dress 400 g, sneakers 750 g, dress shoes 1.0 kg, laptop 1.5 to 2.0 kg, toiletry bag (full) 1.0 to 1.5 kg, winter jacket 1.2 kg, hairdryer 600 g, travel adaptor 150 g.
United's Routes from Australia
United flies year-round nonstop between the United States and three Australian gateway cities, plus a fourth on a seasonal basis over the Australian summer.
| Australian city | US gateway | Schedule |
|---|---|---|
| Sydney | San Francisco, Los Angeles, Houston | Year-round |
| Melbourne | San Francisco, Los Angeles | Year-round |
| Brisbane | San Francisco | Year-round |
| Adelaide | San Francisco | Seasonal, Southern Hemisphere summer |
Whichever gateway city you fly from, the carry-on and checked baggage rules covered in this guide apply the same way, since they are set by fare type and cabin rather than by route.
Source: United Airlines route announcements and current schedule reporting - verified July 2026
Which Suitcase for Your United Trip?
š
Standard Economy - short to medium trip
23 kg checked allowance. A lightweight 67 cm case (3.2 kg) leaves 19.8 kg to pack, workable for up to 10 days with careful packing.
Checked: 1 bag, 23 kg
Shop Medium Lightweight
š§³
Basic Economy - carry-on only or 1 paid bag
No free checked bag, so a carry-on that maximises the 56 x 35 x 23 cm limit is worth prioritising if you want to skip the first-bag fee entirely.
Carry-on: 56 x 35 x 23 cm
Shop Carry-On Cases
š
Premium Plus base fare - 1 bag at 32 kg
A single large 76 cm case at 4 kg leaves 28 kg to pack, generous for most trips even on the reduced one-bag base fare.
Checked: 1 bag, 32 kg
Shop Large Cases
āļø
Polaris standard or flexible - 2 bags at 32 kg
Split 64 kg across 2 cases, for example a large case at 30 kg and a medium at 20 kg, with plenty of headroom left over.
Checked: 2 bags, 32 kg each
Shop Large + Medium Set
How United Compares on the Australia to US Route
United's standard Economy allowance (1 bag, 23 kg) compared with other carriers flying between Australia and the United States:
United Airlines (Standard Economy)
23 kg
1 free bag. Basic Economy: 0 free bags, fee applies. Carry-on: 56 x 35 x 23 cm.
Qantas
30 kg
Flexi/Classic Economy on Pacific routes. Economy Lite: 23 kg.
Delta Air Lines
23 kg
Standard Economy on Australia routes. Basic Economy: fee applies for the first bag.
American Airlines
23 kg
Main Cabin on Australia routes, via the Qantas joint venture. Basic Economy: fee applies.
Virgin Australia
23 kg
Economy on partner-operated US services. Allowance varies by operating carrier and codeshare terms.
Reflects standard published Economy fares as of July 2026. Always verify on the operating carrier's own website before booking, since codeshare and partner flights can carry a different allowance to the marketing airline's own policy.
Common United Baggage Mistakes to Avoid
- Assuming Basic Economy on the Australia route works like domestic US Basic Economy. Domestic Basic Economy drops the carry-on entirely. Long-haul Pacific Basic Economy to Australia keeps the full-size carry-on bag, so you are not restricted to a personal item only.
- Booking Premium Plus or Polaris and assuming two free bags. Since the 2026 fare tier changes, the new base fare in both cabins only includes one free checked bag. Check the baggage line at checkout, not just the cabin name.
- Packing a single bag close to 23 kg without weighing it. A standard large suitcase packed for a long trip can easily tip over the 23 kg Economy limit. Weigh at home before you leave, since the overweight fee applies from the very first kilogram over.
- Not accounting for currency conversion on fees. United charges baggage fees in US dollars. The amount on your Australian card statement will vary slightly from the headline USD figure depending on your provider's exchange rate on the day.
- Assuming every Australian gateway has the same schedule. Sydney, Melbourne and Brisbane run year-round, but Adelaide is seasonal. Confirm your exact travel dates fall within the seasonal window before booking through Adelaide.
- Overlooking oversized sporting equipment fees. Ski gear, golf clubs and surfboards sit outside the standard checked bag allowance and pricing. Check United's oversized and sporting equipment fees separately before you fly.
Frequently Asked Questions
Does United Economy include a free checked bag from Australia?
Standard Economy fares between Australia and the United States include one free checked bag up to 23 kg. Basic Economy fares do not include a free checked bag, and the first bag costs roughly USD 75 to USD 100 depending on where and when you pay.
How many free bags does United Polaris business class include?
It depends on the fare tier. Standard and flexible Polaris fares include two free checked bags at 32 kg each. The newer Polaris base fare, introduced in 2026, only includes one free checked bag.
What size carry-on bag can I bring on a United flight from Australia?
Your carry-on bag can measure up to 56 x 35 x 23 cm including wheels and handles. Your personal item can measure up to 43 x 25 x 22 cm and must fit under the seat in front of you.
Which Australian cities does United fly to?
United flies year-round to Sydney, Melbourne and Brisbane from San Francisco and Los Angeles. Adelaide is served seasonally from San Francisco, and Sydney also connects direct to Houston.
What happens if my checked bag is over 23 kg on United?
Bags between 23 kg and 32 kg incur an overweight fee of around USD 100. Bags between 32 kg and 45 kg incur a higher fee of around USD 200, and bags over 45 kg are not accepted as standard checked baggage.
What changed with United Premium Plus and Polaris baggage in 2026?
United introduced base, standard and flexible fare tiers across Premium Plus and Polaris business class in 2026. Standard and flexible fares still include two free checked bags at 32 kg each, but the new base fare in both cabins only includes one free checked bag.
Does United Basic Economy include a carry-on bag on flights to Australia?
Yes. Unlike domestic US Basic Economy, which only includes a personal item, Basic Economy on long-haul Pacific routes to Australia includes a full-size carry-on bag as well as a personal item.
How many kg baggage allowed in United Airlines?
Standard Economy allows 23 kg per checked bag. Premium Plus and Polaris business class allow 32 kg per checked bag. Every fare and cabin also allows an overweight bag up to 45 kg for an additional fee, above which the bag is not accepted as standard checked baggage.
Are laptops allowed in checked baggage on United Airlines?
Yes, a laptop itself can go in checked baggage if it is fully powered off and protected from accidental activation, in line with FAA rules. United and the FAA both recommend keeping laptops in carry-on instead, due to fire and theft risk, and spare batteries or power banks are never allowed in checked baggage regardless of the device.
Does United Airlines have the 2 piece baggage allowance?
United uses the piece concept rather than a total weight pool, but Economy passengers from Australia only get 1 free piece. A 2 piece allowance applies to Premium Plus and Polaris business class on standard or flexible fares, and can also apply to Economy passengers with Star Alliance elite status or an eligible United co-branded credit card.
Other Airline Guides from Tosca
See all airlines compared side by side in the Tosca Airline Baggage Comparison Hub.