After years of operating widebodies on the route between Atlanta and Los Angeles, Delta finally decided to consider the route a Delta One experience.

As flagged by others, including the always-reliable JonNYC, the route between ATL and LAX is going to transform to Delta One service.

Taking a closer look at Delta’s website, we’re seeing that the conversion to Delta One happens starting March 29, 2026. Prior to this date, all frequencies, including those on widebodies, will continue to be sold as first class. We’ve flown on these widebodies on this route in all cabins, and getting a lie-flat seat in first class has always been a treat. And soon, the cabin will be considered Delta One.

Importantly, not all flights between Atlanta and Los Angeles will feature the Delta One experience. In fact, most flights will not feature Delta One. But if you’re going to spend a lot of money anyways for first class, why not get a more premium experience on top?

Current domestic Delta One routes

With the addition of this route, that now makes 13 routes that feature Delta One domestically by our count:

• Atlanta ATL – Anchorage ANC
• Atlanta ATL – Honolulu HNL
• Atlanta ATL – Los Angeles LAX
• Atlanta ATL – Maui OGG
• Boston BOS – Los Angeles LAX
• Honolulu HNL – Detroit DTW
• Honolulu HNL – Minneapolis MSP
• Honolulu HNL – New York JFK
• Honolulu HNL – Salt Lake City SLC
• Los Angeles LAX – Washington DCA
• Los Angeles LAX – New York JFK
• Maui OGG – Salt Lake City SLC
• New York JFK – San Francisco SFO

Could there be more routes that are upgraded to Delta One? Potentially, as Delta does fly widebody planes between other destinations, such as between ATL and JFK or even between MSP and MCO. However, any change is likely not imminent.

What are the real implications of the change? Well, I’m glad you asked.

The Good

Access to Delta One Lounges

One of the best parts about flying in Delta One, whether to domestic or international locations, is the access to Delta One Lounges. You’d be able to access the lounges both before and after your flight. We’ve been to the lounges at both LAX and JFK, and the LAX version is the one we enjoyed more between the two of them based on the better menu and low crowds. At this point, there is no Delta One Lounge at ATL.

You might wonder if this would lead to overcrowding in the LAX lounge. That would have been the case if all frequencies were upgraded to Delta One. However, with only up to three flights operated by widebodies in any given direction, it shouldn’t result in too much of a strain. Besides, the LAX location is still relatively quiet given the low number Delta One flights that touch the airport. Adding the Atlanta flights shouldn’t be a problem.

Better in-flight experience

Domestic Delta One means amenity kits, better bedding, and an elevated dining experience. For those flying in first class anyways, getting these extra features on top is better. Prices for Delta One on this route don’t seem significantly higher than what they charged for regular first class, so it’s good to get more for not much more cash.

It’s not just Delta One that improves. On widebody planes operating as Delta One domestically, there is also the Premium Select cabin, which is their premium economy option. In Premium Select, the experience will feel more like first class, with dining, better service, and even an amenity kit. You’d still lack privacy in these seats, but it’s not like you had much privacy in Delta’s regular first class anyways.

The Bad

Elite upgrades clear day of departure rather than normal upgrade windows

The normal upgrade window for first class is the following:

• Diamond and Platinum Medallions will start clearing 120 hours prior to departure
• Gold Medallions will start clearing 72 hours prior to departure
• Silver Medallions will start clearing 24 hours prior to departure

While that upgrade window will still apply for Premium Select, upgrades for Delta One within the U.S. will only clear on the day of departure.

You might wonder why that’s a big deal. Well, what this means in practice is that you probably won’t get upgraded until within an hour or so of departure. Unfortunately, that results in no real time to enjoy the Delta One LAX Lounge before your flight, and with no equivalent lounge in ATL, it means you won’t get the full experience. Those upgraded to Delta One on the route to LAX could at least still enjoy the LAX lounge on arrival.

Don’t expect getting upgraded often

We also anticipate more Diamond Medallions to choose cabins that have Delta One. Some will still travel on other frequencies if the timing works better for them. But we anticipate the game-within-the-game of winning on upgrades. If there is anywhere that has an overabundance of elites, it’s in Atlanta. And there may be a lot of people over-qualifying for Diamond in that city. If flying this route now comes with elevated service and access to Delta One Lounges, there’s even more reason for Diamonds to choose the flight with Delta One.

If you’re Platinum or below, don’t expect to get upgraded to Delta One. With limited frequencies with Delta One, you’re probably better off choosing a flight with normal first class–you might just have more luck being higher up on the list there. But if you’re Diamond, you might wonder if you have a chance to get Delta One and, provided you have flexibility, will take the Delta One timing.

It won’t take a game theorist to figure out that competition will be tight for those Delta One flights. Good luck to you if you’re trying to make the upgrade.

The Ugly

No more free premium economy seats for Comfort+ passengers

Take the ATL-LAX route now, which will occasionally fly widebody A350s. Delta First would get the lie-flat seats, which are a great upgrade from the normal first class seat even if it doesn’t come with more premium service. But the biggest upgrade is arguably Comfort+, which get the Premium Select cabin for no upcharge above the Comfort+ fare.

Don’t believe me? Take a look at that seat map. Rows 20-24 are listed as Delta Comfort+.

Fast forward to after the conversion to Delta One happens and you’ll find they’re now marketing the cabin as Premium Select.

The proof is in the seating map. Those same rows are now considered Premium Select, commanding materially higher prices on what used to be given away. Sure, you now get more premium service in that cabin, but no one would argue it’s north of $600 better.

The ride had to come to an end sometime, right?

What do you make of the upgrade to Delta One on the route?

Suggested reading:

• Will Delta Bring Back Upgrades for Elites?
• Life After Delta Diamond: All MQD Thresholds Above Diamond
• Volunteering for Delta Flight Bumps