LAX to BOS flight delays
Los Angeles, CA (LAX) Boston, MA (BOS) · 2,611 miles
453 flights · March 2025 – August 2026 · US Bureau of Transportation Statistics
81.25%
Arrived on time
Within 15 minutes of schedule
1.1%
Cancelled
Share of scheduled flights
107 min
When late, late by
Average across delayed arrivals
21 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The shape of the lateness matters here. Flights on this route are not late often, but when they are late they are late by about 107 minutes — long enough to lose a connection or an evening. The on-time percentage looks reassuring and understates the consequence of being on the wrong flight.
The two directions do not behave alike. BOS to LAX arrives on time 12.4 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
This is a thin route — 453 flights across the whole period. On a route this infrequent a cancellation is far more costly than the rate suggests, because the next departure may not be the same day.
The 3 airlines here are separated by under 2 points — close enough to call a tie. Choose on price and departure time.
Which airline should you fly on this route?
Over March 2025 – August 2026, Delta Air Lines arrived on time most often on LAX to BOS. JetBlue Airways was late most often.
Every airline on LAX to BOS
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| JetBlue Airways | 164 | 78.88% | 1.83% | 75 min | C |
| American Airlines | 116 | 79.13% | 0.86% | 169 min | C |
| Delta Air Lines | 113 | 80.36% | 0.88% | 97 min | B |
| United Airlines | 60 | 93.33% | 0% | 64 min | — |
The return leg
BOS to LAX Boston back to Los Angeles 68.82% on time DOther routes from Los Angeles
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on LAX to BOS during March 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →