WHO: Rachel McAdams
WHAT: Arriving at Berlin's Tegel Airport early this month
WEAR: Christopher Raeburn parka, black and white printed leggings, leather boots, black floppy hat
WHY: A chic hat is a must when traveling, as it covers up unpolished hair and gives any outfit a little extra zing. If a wide-brimmed floppy version a la Rachel McAdams is your cup of tea, we suggest trying Deena & Ozzy's Felt Hat ($34), Eric Javits' Velour Brim Hat ($350), or Free People's Janis Brimmed Wool Tall Hat ($68). For the rest of your look, keep it comfortable and functional by styling any of those hats with Topshop's Khaki Coated Faux Fur Coat ($190), Ella Moss' Heritage Leggings ($60), and a pair of flat boots, like H by Hudson Murphy's Washed Tall Flat Boots ($293).
WHO: Charlize Theron
WHAT: Arriving at LAX late last year
WEAR: YSL Pre-Fall 10 bag, gray sweater, khaki trench coat, black pointy-toe heels
WHY: While we don't usually recommend wearing heels when traveling, if you're headed straight from the airport to a business meeting, Charlize Theron's ensemble is an ideal choice. We love the way she slicked her hair back in a neat bun and kept her look clean with a few basic pieces. To create a Theron-inspired look of your own, start with AG Adriano Goldschmied's Premiere Skinny Straight Jeans ($172), Topshop's Knitted Fine Gauge Long Sleeve Top ($70), and a pair of sleek heels, like Valentino's Black Patent Leather Pointed Pumps ($525). Just be sure to accessorize with an oversized bag, like Topshop's Light Tan Leather Contrast Buckle Strap Satchel ($170), as it is a must for holding all of your carry-on items.
WHO: Nicky Hilton
WHAT: Departing LAX late last month
WEAR: House of Ill Repute Hat, Ecote Surplus Jacket ($50), I Am Beyond Low Rise Yoga Pants ($77), Goyard Bags, Nike Shox Turbo Shoes ($100).
WHY: We understand that comfort is the number one priority when putting together your travel attire, but that doesn't mean a sweatsuit is your only option. By simply combining a few key casual pieces--like a lightweight jacket, yoga pants, and running shoes--Hilton was able to create a stylishly relaxed on-the-go outfit. To achieve a similar look for your next trip, simply pick up her exact pants, The Reformation's Tatum Jacket ($352), and her Nikes for an equally neat look.
WHO: Georgia Jagger
WHAT: Melbourne International Airport in November
WEAR: American Apparel Unisex Flex Fleece Zip Hoody ($46), Topshop leggings, Mood Fabrics scarf, Reebok Freestyle Hi Shoes ($65), top from Carnaby Street boutique in London, Chloe Tamaris Sunglasses ($295, 212.717.8220)
WHY: Functional layers are key when creating a prime jet-set outfit, as Jagger shows us. A basic hoodie and scarf are both essential pieces to have in your carry-on because you can simply add or remove them to match the climate changes without skipping a beat. When packing for your next getaway, don't forget to pick up Jagger's American Apparel jacket (it's a superb choice that will never go out of style) and Love Quotes' Eyelash Scarf ($86) in Loden--we promise they'll come in handy!
WHO: Rachel Bilson
WHAT:: Arriving at LAX early this month
WEAR: Juicy Couture puffer coat (it's from a few seasons ago), Paige Verdugo Jeggings ($199) in Lennox, UGG Australia Classic Tall Boots ($180)
WHY: An oversized puffer jacket is a great additional layer to have when traveling through chilly airports. While this type of coat may be too large to fit in your carry-on bag, you'll definitely want to throw something similar, like North Face's Menlo Puffer Coat ($249), on over a basic sweater or hoodie--you'll be happy to have it, trust us!
WHO: Lauren Conrad
WHAT: Arriving at JFK for a flight back to Los Angeles in October
WEAR: Urban Outfitters Cocoon Coat ($148), Chanel quilted bag, Sartor knee-high leather boots, black cloche hat
WHY: While Conrad's coat is perfect for keeping cozy on and off the plane, her sleek boots and prim cloche hat give the whole look a chic finish. For those of you looking to recreate Conrad's polished mix, start with ASOS' Chunk Waterfall Cardigan ($78) and team it with Forever 21's Cloche Hat ($14) and J. Crew's Weatherby Tall Boots ($325), and you'll be ready to hit the town upon arrival.
WHO: Emma Roberts
WHAT: Arriving at LAX from London back in August
WEAR: Isabel Marant white fur jacket and gray suede ankle boots, J Brand 901 Denim Leggings ($169) in Starless, Tom Ford sunglasses, Brown beanie, Chloe Elsie Crossbody Bag ($1095, 323.602.0000)
WHY: Throwing a chic, textured coat over a casual tee and jeans is a sure way to give your outfit a luxurious and warm finish. If you're in the market for something similar to Roberts' to-die-for jacket, Pins and Needles' Puff Sleeve Faux Fur Coat ($129) and Nasty Gal's Polar Fur Coat ($198) are both amazing options you'll want to check out. To further achieve Roberts' A+ plane ensemble, add Rag & Bone's Chunky Knit Beanie ($80), Forever 21's Be Nice or Leave Tee ($9), and Bagatt's Ankle Boots ($109) and you'll be good to go.
WHO: Blake Lively
WHAT:: Arriving at LAX back in October
WEAR: Autumn Cashmere Classic Rib Drape Tweed Coat ($264), Co-Op Barneys New York studded ankle boots, tan fedora
WHY: If you're planning on carrying loads of luggage or need to rush to your gate, a simple and unfussy outfit is key. Too many layers can often become overwhelming, so we recommend emulating Lively's lovely beige mix, starting with her fedora; Rag & Bone's Kingsley Wool Fedora ($160) is at the top of our list. Then you can pick up her exact knit sweater, Report's Adriana Boots ($40), and you'll be ready for the airport in no time.--Jessica Baker
Photos of Nicky Hilton, Rachel Bilson, and Blake Lively, courtesy of Bauer Griffin; Photos of Lauren Conrad and Charlize Theron, courtesy of Splash; Photos of Rachel McAdams and Emma Roberts, courtesy of Wenn; Photos of Georgia Jagger, courtesy of Getty