Denver Airport Holiday Travel Guide: What to Know Before You Fly Through DEN

Here we are, a week prior to Thanksgiving week – or, as so many Angelenos know it, the “I have to go see my family in _______” week. Maybe some are lucky enough to have that family be down the street or, at the most, in Cerritos. But for a great many transplants that live and work in this beautiful city, Thanksgiving means digging out that big coat, finding socks that aren’t ankle ones, buying an umbrella! And prepping to travel far and wide to see their loved ones.

Regardless of destination, the Tuesday and Wednesday prior to Thanksgiving amount to the two busiest travel days of the year, according to the TSA. And, unless you’re lucky enough to get that sweet, sweet nonstop, you’ll also be traversing some of the country’s most crowded, if not complicated, travel hubs during this hectic time.

Denver is one of those.

Denver International Airport (DEN) is one of the world’s major connecting hubs, especially for travelers heading to the East or Midwest passing through during the busy holiday season.

And it’s huge. At 53 square miles of airport property, it’s the largest airport in the United States – it’s nine (9!) times larger than LAX. Despite this massive size, DEN is surprisingly straightforward, so long as you stick to the single rule for efficient travel: Use the train.

For the travelista who values efficiency and minimizing stress during the holidays, mastering the inter-concourse transit system is that golden key to a successful connection.

While huge, Denver is also beautiful!

(Picasa 2.0 / debenbenn)

Denver International Airport Isn’t Kidding Around This Holiday Season

Denver International Airport turns into one of the busiest airports in the country the moment Thanksgiving week hits, and this year TSA is bracing for more than 845,000 passengers to pass through DEN’s checkpoints between Nov. 21 and Dec. 1, with Sunday, Nov. 30 expected to be the single busiest day at around 96,000 travelers. Add in the mid-December through early-January crush right behind it, when TSA’s own numbers show well over 44 million passengers moving through checkouts nationwide, and DEN’s holiday season total blows past a million easily. For anyone who plans trips around seasons and even themed puzzles, the airport rush pairs oddly well with daydreaming over travel magazines and epic travel adventures. Locals still call the place DIA out of habit, a holdover from before the official DEN code stuck.

A good chunk of that crowd is skiers and boarders using DEN as a launchpad into Colorado’s high country instead of flying home for turkey, because nothing says holiday adventure like trading a coat for a parka twice in one trip, especially if you’re already dreaming up future vacation and travel ideas beyond the holidays.

Whatever your reason for flying, plan to arrive at least two hours before a domestic flight and three hours before an international one. Factor in check-in lines and security, plus the walk to your actual gate itself, and that buffer disappears faster than you’d think. Bring your Real ID too. TSA has required it for every domestic flight since last year, so a standard driver’s license without the little star or flag stamped in the corner won’t cut it anymore. International travelers should double check passport expiration dates well before the trip, since the international arrivals area backs up fast once the holidays hit, and the same kind of planning helps when you’re navigating major international hubs like Heathrow step by step.

If you’re picking someone up instead of flying yourself, skip circling the terminal. Head for the Final Approach cell phone lot, wait for a text or call that your person has landed, and loop in from there. It beats sitting in traffic on Peña Boulevard with everyone else who had the same idea.

Parking, unsurprisingly, gets ugly around the holidays. The economy lots fill up fast once the Thanksgiving and Christmas rushes hit, so if you can, consider the A-Line train instead. It runs straight from Union Station downtown to the airport and skips the parking gamble entirely, a strategy that also comes in handy at sprawling hub airports like DFW where parking and transfers can eat up serious time. Travelers who need accessibility support, whether that’s a wheelchair or just extra time crossing such a sprawling building, can request help through their airline or at a customer service desk near check-in.

The AGTS Lifeline

There are three main concourses (A, B, and C) at Denver International, and they are completely separate buildings: meaning you cannot walk between Concourse B and Concourse C, or between either of them and the Jeppesen Terminal. If you try, you will most likely end up tired or lost. So you rely on the Automated Guideway Transit System (AGTS).

Luckily, it’s free. And It’s reliable. If you’ve ever tried to make a tight connection in boots, a scarf, and emotional exhaustion, the AGTS starts to feel less like an airport train and more like a benevolent holiday spirit guiding you through your layover.

Speed is Predictable: The train runs continuously, with cars popping up every few minutes. The ride between concourses is only 5 to 9 minutes, which is blissfully predictable when everything else about holiday travel is… not.

Access: AGTS stations are on Level B at the center of each concourse – easy to find even if you’ve reached that special travel-state where time, space, and personal grooming no longer matter.

Connection Time Estimates (Train Ride Only):

Once you embrace the train, DEN becomes shockingly manageable, even when you’re wearing too many layers because you forgot how to dress for “weather.”

Security can be an issue if you have to check out or catch an international connection.

(Oddharmonic / Creative Commons)

So What’s Different About Denver Airport Security This Year?

Quite a bit, and most of the changes are aimed at getting you through faster. DEN opened a new West Security checkpoint with 17 screening lanes, and the new technology there lets most travelers leave laptops and other electronics, plus liquids under 3.4 ounces, right in their carry-on bag instead of digging everything out. You’ll still need to put anything sharp or oversized in a checked bag instead, but the carry-on process itself moves noticeably quicker now.

Navigating which checkpoint to use isn’t obvious at a glance, since DEN now runs checkpoints from several different corners of the terminal. There’s the South Security Checkpoint down on Level 5, the newer West checkpoint in the northwest corner, and the Bridge checkpoint up on the north end of Level 6 in the main terminal, which is also where DEN Reserve operates. Contact an agent or check the app before committing to a line, because walking to the wrong one costs a fair bit of time.

Identification has gotten a little more interesting too. Colorado residents can add their state ID to Apple Wallet and use it at the North checkpoint instead of pulling out a physical card, and TSA has been testing facial comparison technology alongside that to speed up verification. CLEAR customers still get their own dedicated lane at several of these checkpoints, on top of whatever line the app sends everyone else to.

Here’s something that trips people up every single year. Don’t fly with wrapped gifts. TSA has said for years that wrapped gifts are one of the first things agents ask to open, so save the wrapping paper and bows for after you land, or ship the gifts ahead of time instead.

DEN’s own holiday advisories point to three windows when security lines bunch up hardest: early morning between 3 and 4:30, again from 8 to 10 a.m., and once more from 3 to 5 p.m. None of that is fun to hear if your flight happens to land in one of those windows, but at least now you know why the line looks the way it does—and why borrowing a few luxury wellness retreat planning habits, like building in extra buffer time, can make airport days feel calmer.

The Holiday Playbook: A Couple of Timing and Security Workarounds

Peak holiday travel has one job: to test you. Test your patience, test your rolling suitcase wheels, or test whether you can consume three different types of carbohydrates at 6 a.m. without regret.

So here’s how to outsmart the chaos instead of becoming its latest victim.

Domestic Connection Times

For domestic-to-domestic flights, DEN is so efficient that many travelers feel fine with 45–60 minute connections, assuming their first flight is on time and the travel gods are smiling.

But for a connection that doesn’t require speed-walking, prayer, or a frantic gate-to-gate jog in your heaviest coat, aim for 90 to 120 minutes.

It’s the sweet spot: enough time to breathe, hydrate, charge your phone, and emotionally prepare for the “So how’s work going?” interrogation awaiting you at your destination.

The Power of DEN Reserve

DEN Reserve is a free system that lets you book a designated time slot for TSA screening, basically a Disneyland FastPass but to go through metal detectors.

The Benefit: If you leave the secure area (international arrival, re-checking a bag, rescuing a lost family member), you don’t have to return to the main security line. With DEN Reserve, you can stroll into your scheduled lane with ease.

(Just confirm which checkpoint offers it, don’t confidently march to the wrong one while clutching your reservation like a boarding pass to heaven.)

As of now, DEN Reserve slots open up to three days before your flight, not weeks out, so it’s worth booking as soon as your itinerary is set rather than assuming a spot will be waiting the morning of.

The Concourse A Exception

Concourse A is the only one you can reach via a pedestrian bridge from the Jeppesen Terminal. It’s a quick 5-minute walk, has moving walkways, and gives you a cathartic aerial view of the airport.

Perfect if you: need fresh air (well… airport air), want to stretch your legs, or just need a moment alone to mentally apologize for the things you yelled internally during boarding.

Grabbing a Bite (and a Gift) Before Your Next Flight

Once you’re through security, DEN actually wants you to relax for a minute instead of sprinting straight to catch your next flight. The airport has well over 170 shops and restaurants spread across its concourses, plenty of amenities for grabbing food, a gift, or just a spot for sitting while you wait. A lot of them will even deliver straight to your gate through mobile ordering apps if standing in another line sounds unbearable. Order ahead, top off your phone charger, and eat something that isn’t a stale pretzel from a vending machine.

If you still need last-minute gifts, the concourses are full of local shops selling Colorado-themed stuff that doesn’t scream airport gift shop. Just remember what we said earlier. Leave the wrapping paper for later.

For the holidays specifically, keep an eye out for Santa’s Layover Lounge, a seasonal pop-up that usually takes over Lounge 5280 on Concourse B’s mezzanine level and sticks around well into January, holiday cocktails included.

Digital touch screens near the gates run on that same kind of technology, showing real-time flight status and walking directions, as long as they stay functional, which helps when you’re trying to figure out how far “just a few more gates” actually is. Worth a glance if you’d rather check a screen than contact a gate agent directly.

Strategic Final Tips

Gate Distance: The concourses themselves are extremely long (Concourse B is over 4,500 feet – that’s almost a mile). Even if you land and depart from the same concourse, allow 15 to 20 minutes for walking between gates at opposite ends. Use the moving walkways. Use all of them. Your future self will be grateful.

The Ultimate Luxury: Utilize airport lounges (United Club, Delta Sky Club, etc.) located in the concourses. Once through security, you have access to any concourse via the AGTS, giving you options for a quiet workspace or a quick, high-quality meal before your next flight, much like the award-winning Escape Lounge at Portland International Airport, the speakeasy-style Sidecar Centurion Lounge in Las Vegas, or Delta’s elevated Delta One Lounge at LAX Terminal 2.

See? There’s no reason to stress this holiday, or at least save it for an overcooked turkey!