Most airlines allow passengers to bring on both a carry-on and a personal item like a backpack, laptop bag, purse, briefcase, shopping bag, etc. The general rule of thumb is that your personal item is smaller in dimension than your carry-on bag and it can fit underneath the seat in front of you.
You are permitted to bring a backpack in addition to your carry-on baggage provided that the backpack does not count as a personal item and that it satisfies the size and weight requirements for carry-on luggage.
Passengers are permitted to bring one personal item and one carry-on bag, in addition to a second carry-on bag, as long as the dimensions of that bag do not exceed 22 inches by 14 inches by 9 inches ". This supplementary luggage may take the form of a carry-on suitcase, a duffel bag, or a backpack.
You are allowed to bring onboard two (2) pieces of bag as part of your cabin baggage allowance with the total weight of both items not exceeding 7kg.
Carry-on baggage. Each passenger is allowed one piece of carry-on baggage with a maximum total dimension of 56cm x 36cm x 23cm (22in x 14in x 9in) and maximum weight of 7 kgs. (15 lbs).
In summary, backpacks can be used as personal items, but they must fit in the plane's cabin. In addition, when airlines publish size limitations, your rucksack must be less than those limits. Otherwise, you will be charged additional costs or have things abandoned at the airport.
Generally, for carry-on luggage, passengers are allowed to take one bag and one personal item with them onto their flight. Personal items usually include a laptop bag, handbag or briefcase that easily fits under the cabin seat.
Per TSA regulations, carryon items are limited to one bag plus one small, personal item. Personal-type items include: Purses. Briefcases.
Backpacks, totes, and crossbody bags are typically considered personal items too. The key to remember is it must be able to fit underneath the seat in front of you. A carry-on is a type of hand luggage that you bring into the plane cabin with you and is larger than a personal item.
In addition to your carry-on baggage allowance, you may also carry onboard one small personal item such as a handbag, laptop computer*, overcoat, small camera, a reasonable amount of reading material or a small amount of duty free goods (where permitted).
How Strict are Airlines About Personal Items? As long as your bag fits under the seat in front of you, you can probably get away with a bag that's slightly over your airline's size guidelines. However, just as the size restrictions vary by airline, so does their enforcement of those restrictions.
The majority of airlines allow one piece per passenger plus a smaller piece (i.e. a handbag or laptop bag). However some budget airlines count a handbag as a piece of hand luggage so if you want to take both, you will need to pack your handbag or laptop bag inside until you have boarded.
A bumbag/fanny pack is an accessory, like a backpack or a lady's purse/handbag, and you should be prepared for it to be treated as such. That said, Mrs DC8 always wears a bumbag when travelling and it has never been an issue on any airline including the likes of Ryanair and Easyjet.
If your instrument is too large to fit in the cabin, you can also purchase a seat for it. Just make sure that it meets the airline's size and weight requirements before you board. Finally, you can also bring military bags and sports equipment as carry-on item.
Each passenger is limited to one quart-size bag of liquids, gels and aerosols. Common travel items that must comply with the 3-1-1 liquids rule include toothpaste, shampoo, conditioner, mouthwash and lotion.
Containers larger than 100 millilitres or 100 grams, even if only partially-filled, containing liquids, aerosols or gels will not be allowed through the security screening point. For example, a 200 gram toothpaste tube that is half-full will not be permitted.
You can take one 115-centimetre bag (56cm x 36cm x 23cm), with a maximum weight of 7 kilograms. Alternatively you can take two 105-centimetre carry-on bags (48cm x 34cm x 23xm), or one 105-centimetre bag and one 185-centimetre non rigid garment bag.
The 40L will max out carry on dimensions on most airlines so you never have to check a bag. For stricter airlines, like RyanAir, 30L will be a better choice.
30L or 40L backpacks are great options for primary carry ons but are usually too big to be considered personal item that need to be small enough to slide easily under the seat in front of you.
Flight attendant Andrea Fischbach recommends leaving all restrictive clothing in your suitcase when flying. She says anything that sits too heavy on the skin can cause cramping, swelling and be a pain later down the line.