The Denver lounge problem: why one of America's busiest airports has so few lounges

Denver International handled 82,427,962 passengers in 2025, which made it the fourth-busiest airport in the United States and the tenth-busiest in the world, according to Airports Council International's 2025 ranking. Only Atlanta, Dallas/Fort Worth and Chicago O'Hare moved more people in the US. It is not top five in the world; it is comfortably top five at home.

Walk its three concourses and you find eight lounges in our directory. Five belong to United, and one of those is a grab-and-go counter. There is no Priority Pass lounge, no Chase Sapphire Lounge, no Polaris lounge, and nothing at all for Southwest or Frontier, which between them carried about four in ten Denver passengers in 2024. Dallas/Fort Worth, which is only a few million passengers bigger, has 17 lounge entries on this site. That is the Denver lounge problem, and it has fairly specific causes.

Every lounge open at DEN today

Concourse A has the most variety, because it is where the airport put most of the lounges that are not United's.

• Capital One Lounge, mezzanine near A34. Rated 4.7, two showers, open 5am to 9pm. Venture X and Venture X Business holders get in; guests are $45 each. It is run by Plaza Premium Group and opened in November 2023. If you hold the card, this is the best room in the building for most trips.
• Delta Sky Club, level 4 above the center core, entrance just past the bridge from the terminal. Rated 4.5. It reopened in early 2026 after an expansion took it from roughly 90 seats to about 230, with a second phase to around 400 seats planned but, as far as I can find, without a firm date. Delta flyers, Delta Reserve holders and US Amex Platinum holders (10 visits a year) are the core crowd. It keeps the longest hours at DEN, 4:30am to 12:15am.
• United Club (A), west side near A25. Rated 3.6. The lodge-style club with the fireplaces, two levels, about 400 seats. It closes earliest of the big clubs, at 8:30pm.

Concourse B is United's home, and it shows.

• United Club (B West), near B32. Rated 4.5. Reopened July 31, 2025 at 33,000 square feet with more than 600 seats.
• United Club (B, east), near B44. Rated 4.5. Opened in 2023 at about 35,000 square feet, which United called its largest club at the time.
• United Club Fly, at concourse level between B60 and B63. Rated 1.4. It is a snack and drink counter, not a lounge: almost no seating, no restrooms, no guests, and one-time passes are not valid. I list it because United counts it, not because you should plan around it.

Concourse C is where Southwest and most other carriers board.

• The Centurion Lounge, mezzanine near C46. Rated 4.8, the highest score at the airport, with two showers. Open since 2021. Amex Platinum and Centurion cardholders; Platinum guests are $50 each unless you hit the $75,000 spend threshold.
• American Airlines Admirals Club, mezzanine between C30 and C32. Rated 3.9. Small, with capacity for about 114, opened in 2023. Admirals Club members, oneworld elites and premium-cabin international oneworld passengers; $79 day passes are sold if you are flying American or a oneworld partner that day.

There is also a USO lounge on Concourse A for service members and their families, which is not in our directory.

That is the whole list. United Club members and Star Alliance Golds are well served: four clubs, two of them rated 4.5. Amex Platinum and Venture X holders each get one strong lounge, on different concourses. Everyone else, including the person holding a Priority Pass card from a Sapphire Reserve, gets nothing.

Why it looks like this

United owns the hub. United carried just over 41.4 million passengers through DEN in 2025, about half the airport's traffic, and has 90 gates. The airport's 2022 gate expansion added 39 gates across all three concourses, and 22 of them went to United on A-West and B-East. Concourse B is effectively a United terminal. When the airline holding most of a concourse wants club space above its gates, it gets it, and United has spent the past three years filling that space: B East and A in 2023, B West in 2025. I would not expect a bank lounge on Concourse B; it would sit inside the United hub competing for United's own customers.

The airport is built for connections, and connections stay airside. About 45 percent of DEN's 2024 passengers were connecting. They never see the main terminal; they ride the train between concourses. So lounge space has to be on the concourses, and the concourses were designed in the early 1990s around gates and shops, not 20,000-square-foot clubs. Space suited to a big lounge is limited, which is why every lounge on the list sits on a mezzanine or an upper level.

The Great Hall project has taken a decade of attention. The rebuild of the main terminal has been running since 2018, has moved security up to new checkpoints on Level 6, and is scheduled to finish in 2027 at a reported cost of about $1.3 billion. Its last phase includes a "Living Room" dining zone on Level 5. None of that is airside lounge space, and it has kept the airport's capital program pointed elsewhere.

The concession route is slow. The Capital One Lounge came in as a lounge concession, with Plaza Premium as operator and two Denver-based disadvantaged-business partners. Concessions here go through city contracting, and in 2022 the Denver Auditor criticized the airport for awarding roughly 40 percent of its concessions without a competitive process; the airport said it would look at alternatives. I have not found evidence that this directly blocked a lounge, so treat it as context, not cause. But it is not an environment that produces new lounges quickly.

Southwest and Frontier have never sold lounges. Southwest carried about 31 percent of DEN passengers in 2024, Frontier about 10 percent. Neither has a lounge anywhere yet. That leaves a huge share of the airport flying on carriers with no club, mostly from Concourse C, where the only options are Amex-only and American-only.

What has actually been announced

United Polaris. Scott Kirby said in May 2023 that a Polaris lounge would go on the Concourse A mezzanine between A18 and A20, "in a couple years." In July 2025 United said design had begun and that it would be the seventh and last domestic Polaris lounge, with no opening date. As of October 2026 I can find no opening date, and Denver remains the only United hub without one. It will matter mainly to long-haul premium passengers, a small group at an airport where international traffic was 5.9 percent of the total in 2025.

Southwest. On September 2, 2026, Southwest named its first four lounges, built with Chase: Austin, Baltimore, Honolulu and Nashville, opening late 2027, with at least seven more planned but not named. Earlier this year CEO Bob Jordan was reported, via Bloomberg Law, as saying Southwest was working to lease space in Denver, and one industry tally lists Denver for 2028. Neither Southwest nor the airport has confirmed a Denver lounge, a location or a date, so treat this as unconfirmed. If it happens, Concourse C is the obvious place.

Chase Sapphire Lounge. None announced for Denver. Chase's announced pipeline is Los Angeles and Miami. And since Sapphire Lounges left Priority Pass on August 15, even a future one would not help Priority Pass members; see what changed when Sapphire Lounges left Priority Pass.

Capital One, Amex, Delta, American. I found no announced new Capital One location or Centurion expansion at DEN. Delta's second expansion phase is the only other concrete growth. American's club opened in 2023 and nothing further has been said.

Another United Club. One August 2026 industry roundup lists a new United Club with a terrace on Concourse B for late 2026 or early 2027. I could not confirm this with United or the airport, so I would not count on it.

What this means if you fly through Denver

If you fly United and have club access, Denver is fine, even good. Use B West or B East and skip Fly.

If you carry a Venture X or an Amex Platinum, know your concourse. The Capital One Lounge is on A and the Centurion is on C. All three concourses are linked airside by the train, so a United passenger departing from B can still use either without clearing security again; just leave time for the ride back.

If you rely on Priority Pass, Denver is a dead zone and has been for years. Nothing in the announced pipeline changes that, which makes the Priority Pass value question harder if Denver is home.

If you fly Southwest, Frontier or another non-United carrier with no premium card, there is nothing for you at DEN today, and the earliest realistic change is a Southwest lounge that has not been formally announced.

For the brands themselves, see our rankings of Centurion Lounges, Capital One lounges, United Clubs and Delta Sky Clubs, and the full pipeline of lounges opening in 2026 and 2027. Ratings cited here follow our methodology.