Delta wants to be the undisputed number one airline at Los Angeles International, and it just laid out how it plans to get there. Between December 2026 and July 2027, the airline is adding two brand-new routes from LAX and beefing up seven existing ones — a scale of growth that will push Delta and its partners past 200 daily departures to nearly 70 destinations at the summer 2027 peak.
The new flying starts with Monterey, California, getting two daily Delta Connection flights on Embraer E175s from December 19, 2026. Then on June 7, 2027, Philadelphia joins the map with a daily Airbus A321neo flight — a notable move into an American Airlines stronghold.
The expansion of existing routes is where the corporate-traveller play becomes obvious. Boston, San Diego and Seattle all get big boosts: Boston and San Diego go to five daily flights each (May 6 and June 7, 2027 respectively), while Seattle hits eight daily from July 11, 2027. The same July date brings a second daily Raleigh-Durham flight — actually starting April 12 — plus two daily to Cincinnati and three each to Houston and San Antonio. Several of those cities are hub towns for rivals, which tells you Delta isn't shy about a fight. The airline also claims to be the only carrier at LAX serving all of the airport's top ten markets with multiple daily flights.
For the passenger, the practical upside is choice: more frequencies mean better connections, more options if a flight cancels, and a wider pool of award seats if Delta releases them. The expansion rides on the back of Delta's new Delta One Lounge at LAX and a heavy investment in premium seating — the airline says it offers more premium seats at LAX than anyone else.
Whether this actually pays off is the open question. LAX has humbled plenty of airlines: it's fiercely competitive on both domestic and international routes, and no carrier has historically managed to grow there profitably while holding the crown. American, United and Delta have traded the top spot over the years. Delta is betting that premium demand and corporate contracts will make its maths work this time. There's also a branding element worth a chuckle — the word "premium" appeared 21 times in Delta's announcement, a fact commentators were quick to poke fun at, noting that genuinely top-ranked airlines rarely need that much reminding.
If you're based in Los Angeles or the cities on this list, the changes are worth keeping an eye on when booking 2027 travel — more Delta frequency in markets like Seattle, Boston and San Diego should shake up fares and schedules in those corridors.