BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
BOS→LAX

Boston, MA (BOS) to Los Angeles, CA (LAX) flight delay odds

73.7% of 4,713 official scheduled BOS-to-LAX flights arrived on time; 15.6% arrived at least 30 minutes late and 1.4% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
73.7%arrived on time
15.6%30+ min late
1.4%cancelled
4,713scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.7%all scheduled flights
120+ minutes late4.2%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+10.2 mincompleted flights

Which departure time was most reliable for BOS to LAX?

Among qualifying BOS-to-LAX departure window results, Early morning had the highest on-time rate: 81.7% of 1,533 flights. Night was lowest at 55.8% across 77 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,53381.7%9.3%1.4%
Late morning80078.5%10.8%1.5%
Afternoon83773.6%15.5%1.8%
Evening1,46663.6%24.0%1.2%
Night7755.8%32.5%1.3%

Which weekday was most reliable for BOS to LAX?

Among qualifying BOS-to-LAX weekday results, Wednesday had the highest on-time rate: 77.6% of 666 flights. Monday was lowest at 68.8% across 702 flights.

DayFlightsOn time30+ minCancelled
Monday70268.8%16.0%4.4%
Tuesday67976.6%12.7%1.5%
Wednesday66677.6%14.7%0.2%
Thursday69072.9%17.4%0.1%
Friday69674.0%16.2%0.6%
Saturday58174.7%16.0%0.9%
Sunday69971.7%16.2%2.1%

Which airline was most reliable for BOS to LAX?

Among qualifying BOS-to-LAX airline results, United Airlines had the highest on-time rate: 75.7% of 716 flights. American Airlines was lowest at 72.8% across 1,143 flights.

AirlineFlightsOn time30+ minCancelled
JetBlue Airways1,62673.3%16.5%1.4%
Delta Air Lines1,22873.9%14.5%1.7%
American Airlines1,14372.8%16.6%1.3%
United Airlines71675.7%13.8%1.1%

Which month was most reliable for BOS to LAX?

Among qualifying BOS-to-LAX month results, August 2025 had the highest on-time rate: 85.2% of 433 flights. December 2025 was lowest at 61.2% across 381 flights.

MonthFlightsOn time30+ minCancelled
July 202543972.4%18.5%0.2%
August 202543385.2%9.0%0.0%
September 202536479.1%14.0%0.0%
October 202540270.1%21.1%0.7%
November 202537576.8%14.4%1.3%
December 202538161.2%23.9%1.3%
January 202637363.8%17.4%5.6%
February 202634462.2%21.2%7.6%
March 202639080.8%10.5%0.5%
April 202636278.5%11.6%0.3%
May 202639884.2%6.5%0.0%
June 202645268.4%19.2%0.7%

What drove BOS to LAX delay minutes?

Late aircraft was the largest recorded BOS-to-LAX delay category, accounting for 42.4% of 88,912 BTS-attributed delay minutes during July 2025–June 2026.

Airline34.2%
Late aircraft42.4%
National airspace21.1%
Weather2.2%
Security0.1%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.