Edit: Missed that you asked about online stores, sorry. Still, the below might be helpful for you or someone else.

In Seoul, check out Mario Outlet near Gasan Digital Plaza Station (Line 1):
http://english.visitkorea.or.kr/enu/SHP/SH_EN_7_2.jsp?cid=727522

Three buildings of outlet shops and at the intersection farthest from the subway station you’ll also have a Hyundai Outlet Mall, W-Mall Outlet, and Plastic Island Department Store.

If you have a car, live in Paju, or don’t mind a commute there’s also Paju Premium Outlet:
http://english.visitkorea.or.kr/enu/SHP/SH_EN_7_2.jsp?cid=1247235

There’s a list of brand stores here if you want to check what they have before you go:
http://www.premiumoutlets.co.kr/paju/store_centermap

Otherwise, check out 2001 Outlet (locations throughout Seoul and Suwon), Hyundai Department Store, and Lotte Department Store. As someone else mentioned, Uniqlo might have something that firs your budget and tastes.

uniqlo

Gmarket

코트 30만원인면 싼건데 뭔 개소리야 ㅋㅋㅋㅋㅋㅋ

싼거사고싶으면 지마켓/11번가에서사면 되긴 되는데

거지처럼입고 돌아다니고싶냐--

역시 외국인들 돈가지고 참 찌질하다 ㅋㅋㅋㅋㅋㅋㅋㅋ

Kathmandu is probably your best bet to start with. Macpac also has a range of adventure gear.

Are you going straight to Hokkaido or will you have a day in Tokyo/osaka? Cos I suggest going straight to uniqlo when you get there and buy the thermals in Japan. They have the crazy warm ones and are pretty cheap.

As for ski jacket/pants, anaconda usually has a sale at the end of winter and it’s pretty decent snow gear.

Also make sure to layer as it can get really warm when you’re inside. And get waterproof boots

Around September, start hitting the OP shops, especially in the western suburbs. You have a good chance to find actual ski gear.

I would also suggest that you think in "layers" get good quality long john's and a similar top (buy 2 of each) and a good quality nice looking beanie.in civilised societies, (you will find this hard to believe) but they actually HEAT their homes and buildings so that it actually warmer on inside in winter. So when you arrive in a place you will "layer down" and then "layer up" when you are outside.

We were in Italy in December and, without any clothing suitable for the freezing cold, stayed warm enough outside.

Aldi have some around winter

Ah dang. Are you only there for sightseeing or skiing as well?

Anaconda. The one in Innaloo has a decent range around Australian ski season and Japan ski season. They usually have a sale in December.

They carry a range of price levels. Their basic Chute brand is fine for a once a year ski trip - it's worked for us over a few trips.

Hokkaido was cold this year, I was wearing thermals top and bottom, tshirt, a uniglo fleece zip up top, ski pants and jacket, beanie, snood and ski gloves and was just warm enough.

Also worth getting ski socks - they don't have a seam which can get painful when wearing ski boots.

(I'm assuming there's skiing involved - if not normal cold weather clothes + thermals will be fine)

uniqlo (not cheap but i like the quality)

Lucy and Yak have some lovely cosy fleeces, both full and half zip. They’re a little pricy but great quality and they regularly have sales on end of lines etc (they seem to do smaller batches of items in specific fabrics they have) so if you keep an eye out it’s definitely worth grabbing one

I’ve been mainly buying from Vinted and it’s been great. You can filter by brand, so I’ve been getting things from places that I already have a fair idea of the sizings. The only thing is that “new without tags” aren’t always new, so watch out for that.

I highly recommend shopping in person.. You can inspect the quality and composition of the clothes. I was in Cos one day and lots of stuff had loose stitching, and even a hole in a T-shirt. I was in & other stories and found the most beautiful knit jumper for €79 and then checked materials.. all synthetic or semi -synthetic materials. If you’re looking for sustainable and long lasting, buy clothes that fit well and have a good material composition. Brand and cost don’t equal quality.

Cos is great for quality and is long lasting. I usually shop the sale items and there is a 10% discount on first signing up.

I think (not sure) Aeon should have some kind of jackets, sweaters, socks and gloves. I'm not sure about the winter coat and boots though. Personally, except if you'll be walking around in snow or be outside in the cold for a long time, normal sports/closed shoes and ~thick socks will be enough for me at least.

Not sure which part of Aussie you r heading to but their winter is pretty tolerable, and you'll be indoors most of the time I assume.

Gloves are not really necessary. You'll need a good coat and heattech (uniqlo).

You dont need winter boots except if you are going to play snow. I usually wear my sneakers with wool socks, more than enough.

I bought my wool coat at Jalan2 Japan bundle.

if u wanna save, try going to those bundle stores/2nd hand items.

Jbr Bundle

Winter Time, Universal Travellers, Uniqlo (online)

Unfortunately, now is the time to buy summer clothes at a bargain. Winter clothes tend to go on sale at the end of January and into February.

Thrifting and 2nd hand can suffice for now, though. Buy what you absolutely need to start off, then hit the stores when the winter clothes are clearancing out.

Outdoor research. Sierra Trading. Thrift stores and garage sales

for sweaters - check out thrift stores! this is the time of year they start bringing out the sweaters and coats, and by the time the cold weather hits, they'll be picked over. You can get /amazing/ deals, you just need to be careful to stick to wool / good quality stuff and check for snags. (and honestly, that's a good idea in normal stores, too)

You can get some really awesome deals at the REI “resupply” section. Some of the stuff is truly used, but some of it is just returns.

You have to be a member, which is a one time $30 fee. And nothing there is cheap, but they do sell truly high quality stuff which will last a looooong time.

Now online summer is the best time to buy winter anything.

I don’t think price point is always indicative of quality at all. H&M & Uniqlo can have really good quality pieces, you just need to look at the labels & check the garments over carefully. M&S are fantastic for good quality knitwear/ basics too but as above, checks necessary! For instance, I loved M&S’ merino wool crew neck. It’s soft, washes well, warm - just ideal. So much so that I wanted to buy the cardigan. Unfortunately (at least in the batch I found in store!) some of the stitching was off & the buttons didn’t line up perfectly.

For slightly pricier but ‘solid’ options I love COS & Arket. Not strictly knitwear but I love Arket’s woven cotton cardigans & jumpers. So thick, warm & very durable. If you have an H&M account, they sell both brands via the H&M app & you still get discount on member bonus weekends. Works out quite well, I find. I also like Whistles’ knitwear.

For coats, it depends if you want ‘dress’ options or more ‘day to day’ waterproof or casual options? My best dress coat I got in the sale at AllSaints. It was still about £250 but it’s cashmere & I’ve had it 8 years so well worth the investment, I’d say. Again, it’s pricier but I also have a Carhartt Michigan jacket that has lasted forever & looks brand new. Check Vinted for anything branded & if not, just Google it. My Carhartt jacket was still full price on their website but I got it in the End sale. I’d say all of the above for everyday options.

For trousers, definitely M&S, Mango & COS.

I would say Uniqlo is a good compromise between quality and price. COS or Arket are a bit pricier but tend to be better quality.

Uniqlo! I often look for better names/ materials on Vinted. I’ll buy decent brands of cashmere in summer when there is less demand and sellers tend to negotiate on price.

You don’t mention your gender. I am female and really like Boden trousers (the Westbourne suit me well) and I will often buy nearly new off Vinted for £15-20 instead of £100 a pair.

My aspirational list is Me&Em, Wrap London, Poetry, some Sezane, and Varley. In real life I lean heavily on M&S, H&M, Arket & Cos. I don't find much I like in Uniqlo and their website is awful. At H&M I go online first and filter on 'cotton' or 'linen' to weed out the dross polyester.

I buy a little from Zara. Particularly casual stuff.

I did like some Reiss coats and blazers last season, but they were over my budget. Instead, I got a wool coat in Mango and I love it.

I really think H&M has gone down in quality in the past five years. I can’t even shop there anymore. Eileen Fisher is my number one: costly but literally lasts decades, so it’s worth it. i’m in EU, they’ll ship or Igo to her stores when i’m near them

Try to buy natural as opposed to synthetic fabrics, like wool and cashmere if you can swing it. They will keep you warmer without needing as much bulk.

Uniqlo often has good-quality cashmere at reasonable prices (for cashmere). They also often have wool stuff, too, and I find that the length usually works for me. My partner moved here to Canada from a hot weather place and the thing he most loves are his wool socks. They keep his feet really warm without having to be super thick.

Jackets and parkas are a different story. A wool coat will not be warm enough at those temperatures. You will need a down-filled parka, and yes, you will look bulky—it’s normal. Where I live in the winter, no one really expects to look cute or to be wearing something figure-flattering walking around in freezing temperatures. We all know the only way to get through is to look like a snowman, haha. It’ll take some time to get used to this attitude towards dressing (it felt strange for my boyfriend at first) but you’ll adapt :)

I have a parka from Soia Kyo that I love and that isn’t too long—but it was really pricey! How tall are you?

Edit: oops, you posted that you’re 5’2. I’d suggest you go for parkas that are meant to be mid-thigh length; I’m also 5’2 and they end up being knee-length on me. Make sure that you get one that covers your butt, also!!

To be honest, you might want to buy a winter coat when you arrive (depending on the weather) as opposed to online, since otherwise it’s hard to tell if it will really be warm enough for you. That will save you some room in your suitcase, too!

if you're moving somewhere that extreme, you're gonna end up with bulkier jackets and parkas anyways.

But your regular wear underneath can still be cute, I usually do petite sized well fitted turtlenecks/cardigans for tops (ASOS and h&m are my go to), and thermal tights with skirts or fitted fleece lined pants/leggings for bottoms.

I'm 5"2 as well, so I got you bro. Lemme know if you need more help!

Lands end has petite sizes and their parkas have served me very well. Don’t try to be fashionable. When it’s that cold, no one cares and you’ll just be miserable. I’m in Chicago so I speak from experience.

I love LL Bean. They carry petite winter cold gear and even rate the coats on temperature protection.

But the key for extreme cold is LAYERS. A base layer, sweater, then coat. Scarves, hats. And mittens are warmer than gloves.

I also like Smartwool socks. Smartwool also makes sweaters and base layers. pricy but last forever.

Base layer (sometimes called long johns) are a critical piece.

I’m from the northeastern US and spent a few years living in Maine. I’m also the type of person that loves fashion and has been known to wear 4-inch stilettos “just because.” Trust me, when winter strikes, fashion is not a consideration. Wear cute clothes underneath, bring a change of shoes in your bag, but when you’re outside, your primary concern is keeping warm for your comfort, health, and safety.

Some of this will be redundant to what other people have to say, so apologies in advance!

Buy fleece-lined tights and layer them under pants. I wear them even under skinny jeans and they add barely any bulk but a lot of warmth. Also wear wool socks. They’re super warm, and will do so even if damp/wet! There’s brands like Smartwool but I buy multipacks of generic brand wool socks from my local wholesale club (BJ’s; I know others have had success with Costco and Sam’s Club). Im not sure if they’re 100% wool, but wow they’re great.

Invest in a good pair of winter boots. I have the classic duck boots by L.L. Bean that are considered New England chic. They make a few different colors and styles and you have the option to purchase unlined or lined pairs. I have a pair lined with Thinsulate fabric and they’re so good at keeping me warm without having the bulk of other liners. The best winter boot is hotly contested and I recommend checking out r/femalefashionadvice. There’s even been some threads on r/Maine! People have different needs. The duck boots admittedly aren’t super grippy on ice so take that into consideration.

Layer layer layer. Sweaters or sweatshirts under coats. Down-filled puffer coats are my personal favorite, you can find some with cute patterns or designs. Long ones (they have some that go down to your calves!) are best for staying warm but I have one that’s regular jacket-length. Pockets are a must. You’ll look super bulky up top and will probably feel self-conscious, until you realize that everyone around you either looks the same or is freezing their ass off. “Trendy” doesn’t exist in the cold and don’t let anyone tell you that it does!

Cover up your head and extremities. Get a good pair of insulated gloves or mittens and store them in your coat pockets. Get a warm scarf. Wool and cashmere are best, but I just use a Pashmina that can double as a wrap in class or at work. The goal is mostly to keep your skin from being exposed to the cold air, and have some sort of buffer that traps heat in. Wrap your scarf around your neck once or twice and zip the ends inside your coat. Again, the bulk is real, but is a necessary evil.

For your head, make sure your coat has a good (preferably insulated) or get an insulated winter hat that covers your ears. Your ears are thin, delicate, and stand out from your body, so they’ll get cold and go numb so fast. It’s really uncomfortable. Earmuffs can also work here and have the bonus of not messing up your hair, BUT earmuffs don’t keep heat from escaping from your head. In elementary school I was taught that half of your body heat can be lost from your head, so it’s SO important to keep your head warm. Your face will get cold, too—I wear a mask (a cloth one that I’d wear for Covid) outside in the winter. Cold air is really drying on your skin so it keeps you warm and protects your skin!

As you acclimate you may find that some of these layers aren’t necessary. Especially if you’re walking for a while, you may not need as many layers, may keep your coat unzipped, etc.

In your bag, carry your nice indoor shoes to change into and a hairbrush for hat hair. The idea is that it doesn’t matter how much like a marshmallow you look like when you’re outside. You just need to get to your destination so you can reveal the outfit underneath everything and look cute.

check this hoodie

Check uniworth

Elo

Breakout

Hoodies from groovy U can buy sweaters from fitted and Lama Check Attir for pullovers and Sweaters as well

If you want high quality then Johnson of Elgin.

https://johnstonsofelgin.com/en-us/collections/cashmere-accessories-sale?filter.p.product_type=Scarf&filter.p.product_type=Glove&filter.p.product_type=Hat&filter.p.m.custom.collection=Men&filter.p.m.custom.collection=Unisex

Joshua Ellis is having 60% off their products, they make really good scarves, and they also do knit accessories (beanies, gloves, socks). You can probably get a scarf, a beanie, and a pair of gloves within your budget while they're still 60% off.

Begg x Co also makes really good scarves, I like their arran brushed scarves, but probably out of your current budget though. Generally most of the good knitwear makers like William Lockie, Johnstons of Elgin, Inis Meain, etc., also offer these accessories. Prices vary of course, and keep an eye for discounts, usually the best time to buy these things is at the end of the winter.

Begg x Co

Arthur Dent for Gloves if you’re looking for leather; scarves I like Barbour or Aspinal; and hats… I like the Bart bobble hats but they don’t suit me so I am typically hatless! (Live in uk and these are all British brands, but I’m sure some are international (i know Barbour definitely is!)