There's an unspoken hierarchy to airport style, and it has nothing to do with your actual seat assignment. You can usually tell who upgraded before anyone checks a boarding pass, and lately, that tell is showing up before people hide away in the luxurious lounges and only reemerge right as the flight is boarding. I'm clocking them in the security lounge.

I've started calling it "Delta One coded": pieces that are as comfortable as anything in your loungewear rotation but photograph like you're about to be handed a warm towel. If you're ready to look like a business-class traveler, keep reading. Below are five outfits that prove you don't need an actual seat upgrade to dress like you have one.

Long Cardigan, Luxe Cotton Set, Sneakers

(Image credit: @stylewithsoco)

A long cardigan does more work than people give it credit for on a travel day. It layers over anything, doesn't wrinkle the way a blazer would, and still looks more finished than a hoodie. Pair it with a soft cotton base layer and clean sneakers, and you've got an outfit built for a six-hour flight that still looks like you tried.

MISSONI Striped Crochet-Knit Cardigan

Cou Cou Intimates The Baby Tee: White Pointelle

Cou Cou Intimates The Pant: White Pointelle

Fur-Trim Coat, Comfortable Pants

(Image credit: @aimeesong)

A fur-trim coat is the fastest way to make an airport look feel like an occasion, even when the pants underneath are as comfortable as pajamas. It's proof that a strong outer layer can carry an entire outfit, no matter how relaxed everything below it actually is.

Isabel Marant Charone Faux Fur Collar Short Parka

Alaïa Blaine Flat

Róhe Cotton-Blend Seersucker Balloon Pants

Cool Matching Set

(Image credit: @clemdelacreme)

A matching set solves the "getting dressed for a 5 a.m flight" problem better than almost anything else. It looks put-together without requiring a single decision, and because the top and bottom are cut from the same fabric, it comes across as an outfit instead of pajamas that made it out the door.

ZARA Oversized Cotton Polo

ZARA Cotton Balloon Trousers

Tory Burch The Boaty

Easy Blouse, Linen Pants

(Image credit: @lefevrediary)

A blouse and linen pants are what happens when someone treats travel dressing like real dressing. Linen creases anyway, so there's no pressure to keep it pristine for 10 hours in a middle seat, and the blouse keeps the whole look from tipping into pajama territory.

Ramy Brook Silk Top

J.Crew Soleil Pant

sam edelman Emory Pointed Toe Ballet Flat

Jeans, Long-Sleeve Top, It Bag

(Image credit: @hadleyhgreene)

Jeans and a simple long-sleeve top are about as foolproof as travel dressing gets, but it's the It bag that puts it into Delta One territory. It's the one piece that isn't about comfort at all, and it doesn't need to be since everything else in the outfit already has that covered.

Cou Cou Intimates The Rina Long Sleeve: White Cotton Jersey

PAIGE Anessa Raw Hem High Waist Wide Leg Jeans

Chanel Cloth Tote