Delta LAX New Routes Add Monterey, Philly to Biggest Schedule

Delta Air Lines is adding two new nonstop routes from Los Angeles International Airport, sending twice-daily flights to Monterey, California starting December 19 and daily flights to Philadelphia starting June 7, 2027. The Delta LAX new routes were announced as part of what the airline describes as its largest-ever schedule at LAX, with more than 200 peak daily departures across nearly 70 destinations planned for next summer when partner airlines are included.

The Monterey service will be operated by Delta Connection using Embraer 175 regional jets, according to Delta's announcement, while the Philadelphia flights will use mainline Airbus A321neo aircraft. Delta will also add a daily nonstop between Salt Lake City and Monterey on December 19, giving the Central Coast airport links to two Delta hubs on the same day.

Three new routes and seven more flights

The announcement covers more than the two new cities. Delta is increasing service from LAX to seven existing destinations: Raleigh-Durham rises to two daily flights starting April 12, 2027; Boston moves to five daily starting May 6; San Diego reaches five daily starting June 7; and Cincinnati, Houston, San Antonio, and Seattle all gain flights starting July 11, ending at two, three, three, and eight daily departures respectively.

Monterey is the more unusual pick. Schedule data from Cirium Diio shows Delta last flew to Monterey Regional Airport in 2008, making the December launch a return after an 18-year absence, Simple Flying reported. The route covers 266 miles down the California coast and gives Angelenos direct access to the Central Coast, including Carmel-by-the-Sea, the Monterey Peninsula, and Big Sur. Delta's release notes the timing arrives ahead of one of golf's biggest championships coming to the area next summer.

The Philadelphia route is the longer play. At 2,409 miles, the transcontinental service connects Southern California directly with a metro area of more than 6 million people known for its history, food scene, and arts. The daily mainline flights begin June 7, 2027, timed for the peak summer travel season.

Delta is going big at LAX

Delta frames the expansion as a defense of its position at Los Angeles. The airline says it will remain first in flights, total seats, and premium seats at LAX, and it describes itself as the only carrier at the airport serving all ten of the airport's largest markets with multiple daily flights. Together, the Delta LAX new routes and the seven frequency increases will push the summer 2027 schedule past 200 daily departures to nearly 70 destinations with partner airlines included, the most in the airline's history at LAX.

The buildout leans on infrastructure the airline has already paid for. Delta completed its $2.3 billion Sky Way project at LAX, which connected Terminals 2 and 3 into a single campus with upgraded wayfinding, security processing, and terminal amenities. That terminal footprint is what makes the current growth possible: more gates and smoother connections mean more room to add frequencies without choking the operation.

Amy Martin, Delta's vice president of network planning, said the additions reflect a long-term commitment to Los Angeles and the West. "With new service to Monterey from both Los Angeles and Salt Lake City, alongside our continued growth at LAX, we're creating more opportunities for customers to connect to the places they want to go while building on our long-term commitment to Los Angeles and the West," Martin said in the announcement.

What it means for travelers

For passengers, the immediate wins are straightforward. A nonstop Los Angeles to Philadelphia flight removes connections through Denver, Salt Lake City, or other hubs, cutting several hours off the journey and eliminating a missed-connection risk. On the West Coast, two daily Monterey flights mean the Central Coast is a short hop rather than a drive or a connecting itinerary.

Timing matters too. The Monterey flights begin December 19, just before the holidays, and run as a winter schedule; the Philadelphia route and most of the frequency increases land in the summer 2027 season. Travelers planning around those dates should check Delta's booking system, since announced schedules roll into sale windows on different timelines. Delta's move also lands amid a flurry of new route announcements this year, from British Airways opening a new Tanzania route to Kilimanjaro and Zanzibar to Icelandair's new Gdansk flights linking Poland to Iceland and North America.

The broader context is that the domestic market keeps growing through hub strength. Business Traveller reported that Delta is defending a narrow passenger-share lead over United at LAX, and these additions land in markets where competitors run their own hubs. For frequent flyers based in Los Angeles, that competition usually shows up as more flight times to choose from and more consistent service on the routes they fly most.