Delta One Lounge Seattle Opening Summer 2025: What To Expect

Over the past several months, Delta Air Lines has very nicely been growing its network of Delta One Lounges. So far, we’ve seen lounges open in New York (JFK), Los Angeles (LAX), and Boston (BOS). In this post, I want to take an updated look at what we can expect from the next lounge in the network to open, especially as more details have just been made available.

Delta One Lounge coming to Seattle in summer 2025

Delta is expected to open a Delta One Lounge at Seattle-Tacoma Airport (SEA) in the summer of 2025. Initially the lounge was supposed to open in early 2025, but that timeline then shifted to the spring of 2025, and now to the summer of 2025. So it remains to be seen whether we’re looking at a June opening or a September opening, as either are possible.

It’s pretty impressive to see the pace at which Delta is able to grow its network of Delta One Lounges, given how hard it can be for airlines to find real estate at major airports. The focus so far has been on more competitive airports. Within a year (or so) of the lounge concept launching, all four of Delta’s coastal hubs will have these lounges.

You’ll notice that Delta has no firm plans to open Delta One Lounges at its biggest fortress hubs, like Atlanta (ATL) and Detroit (DTW), even though they have considerable long haul business class flying. However, there are plans for a Delta One Lounge in Salt Lake City (SLC), though there’s no opening timeline.

While plans for a Delta One Lounge in Seattle were announced some time ago, I imagine Delta is especially happy about having made that decision now, given that Alaska plans to turn Seattle into a global gateway, initially with Hawaiian A330s. The airline even plans to open a new international lounge. The battle in Seattle really is heating up.

What exactly is the Delta One Lounge plan for Seattle?

Where will the Delta One Lounge Seattle be located, and how big will it be? We’ve now learned some more details about what Delta has planned. Delta is building a combined Sky Club and Delta One Lounge in the Concourse A expansion. This expansion is adding 52,000 square feet to the terminal, with 36,000 square feet of that being additional lounge space.

Delta’s new lounge setup will be located in Concourse A, near gate A11, and the two lounges will be stacked on top of one another. The combined Delta lounge facility will be nearly 25,000 square feet, broken down as follows:

• In May 2025, we should see the opening of a new 14,000 square foot Delta Sky Club, located on the lower level
• In the summer of 2025, we should see the opening of a new 11,000 square foot Delta One Lounge, located on the upper level

So far, Delta is promising that the Delta One Lounge will feature an open-air terrace with stunning views of Mt. Rainier, but that’s the extent of the details. Beyond the new Delta lounges, this facility will also have a new lounge from operator The Club, and that should also be around 11,000 square feet.

I’m curious to see what Delta comes up with in Seattle. In terms of size, the Delta One Lounge Seattle should be the second biggest in the system. The New York location is by far the biggest, this will be marginally bigger than the Los Angeles location, and it’ll be substantially bigger than the Boston location.

Come and think of it, it’s funny to consider that the Delta One Lounge in New York is bigger than the other three lounges combined. I’m not sure whether that’s a good or bad thing.

Bottom line

A Delta One Lounge is expected to open in Seattle in the summer of 2025, which will make it the fourth location for the lounge network. I’m happy to see the pace at which Delta is opening these lounges, as they make Delta’s business class ground experience more competitive (which is particularly important in Seattle right now). However, this project has been delayed quite a bit, so hopefully the current timeline sticks.

What do you make of the plans for a Delta One Lounge Seattle?