The flights between New York and California are some of the most fought-over in America. American, Delta, JetBlue and Alaska all fly them from JFK, United flies them from Newark, and most of them sell lie-flat beds up front and pitches itself to business travelers who can't afford to be late. So we checked which airlines actually deliver. We tracked every nonstop between New York's JFK and Newark airports and Los Angeles and San Francisco for 10 days, Oct. 18 to 27, nearly 1,500 flights in all.
The Results
Two airlines stood out. Across all four routes, American arrived on time 91.2% of the time and JetBlue 90.1%, using the government's standard of reaching the gate within 15 minutes of schedule. Alaska, which only flies between JFK and San Francisco, was right behind at 89.3%.
Delta was a step back at 83.9%, though it and Alaska were the only airlines that didn't cancel a single flight. United, which flies all of its New York to California flights from Newark, came in last at 80.5%. It also canceled 11 flights over the 10 days, more than every other airline on these routes combined, and almost one in 10 of its flights arrived more than an hour late.
The best single result belonged to American, which got 98% of its JFK to San Francisco flights and 97% of its JFK to Los Angeles flights in on time. The weakest was United's Newark to San Francisco flight, at 74%, with one in seven flights more than an hour late.
Why Some Airlines Look Better Than Others
Part of the gap is the schedule. Airlines decide how long each flight is supposed to take, and the more time they build in, the easier it is to arrive "on time." On flights from JFK to Los Angeles, American and JetBlue scheduled about 25 minutes more than their planes typically needed, while Delta built in about 20. Heading west, against the wind, that extra time makes a big difference. Heading east, every airline's cushion shrinks to almost nothing, which is why flights back to New York were late more often for everyone.
Part of it is the airport. United's results come entirely from Newark, which has struggled with air traffic controller shortages, and its planes waited longer to take off than anyone else's. Some of United's delays are Newark's, not just United's. Still, if you're choosing between airports for a coast-to-coast trip, these numbers are a real reason to weigh JFK more heavily.
What to Book
If being on time matters most, American and JetBlue were the safest bets on this snapshot, with Alaska close behind on the San Francisco route. Delta was solid and never canceled. If you're flying United from Newark, build in more of a buffer, especially on the San Francisco flights.
Ten days is a snapshot, not a final verdict, and a single storm can reshuffle the order. But it lines up with what matters on these routes: lie-flat seats get the headlines, and getting there on time is what you'll remember. Before you book, check the plane you'll be on too, since the same airline can fly very different cabins between the coasts.
