Route on-time record

BOS to LAX: most on-time flights and the best time to fly

Boston (Boston Logan International Airport) to Los Angeles (Los Angeles International Airport). 4,655 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 1.4% were cancelled. The most reliable flight number was American 404 at 10:00 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

BOS → LAX

Boston to Los Angeles: 4,655 nonstop flights a year

On time (12 months)

76%

Cancelled

1.4%

avg delay 20 min

Best time to leave

Before 9 AM

84% on time vs 66% 6 to 9 PM

Most reliable airline

United

77% chance on time

Check BOS to LAX fares

Lowest nonstop fare seen in the next two months: $195 (American 809 on 2026-10-28). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

#1 · American 404
10:00 AM → 1:25 PM6h 25m nonstop
Local times, typical schedule. Last flown 2026-05-06.
85%
chance on time
On time (history)
94%
Cancelled
0.0%
Avg arrival delay
11 min
- Arrived on time 94% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find American 404 fares Opens this date on Aviasales
#2 · JetBlue 287
6:00 AM → 9:29 AM6h 29m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
On time (history)
87%
Cancelled
1.8%
Avg arrival delay
10 min
- Arrived on time 87% of the time (320 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 66%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Strong track record · 320 flights
Find JetBlue 287 fares Opens this date on Aviasales
#3 · United 360
8:30 AM → 12:05 PM6h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
On time (history)
91%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 91% of the time (64 flights, Jun 2025 to May 2026).
- Never cancelled in 64 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 66%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Moderate track record · 64 flights
Find United 360 fares Opens this date on Aviasales
#4 · JetBlue 687
7:32 AM → 11:01 AM6h 29m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
On time (history)
87%
Cancelled
0.7%
Avg arrival delay
7 min
- Arrived on time 87% of the time (149 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 66%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Moderate track record · 149 flights
Find JetBlue 687 fares Opens this date on Aviasales
#5 · United 311
8:21 AM → 12:05 PM6h 44m nonstop
Local times, typical schedule. Last flown 2026-03-28.
83%
chance on time
On time (history)
84%
Cancelled
1.9%
Avg arrival delay
9 min
- Arrived on time 84% of the time (259 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 66%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Strong track record · 259 flights
Find United 311 fares Opens this date on Aviasales
#6 · United 502
11:15 AM → 2:57 PM6h 42m nonstop
Local times, typical schedule. Last flown 2026-03-28.
82%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
0 min
- Arrived on time 100% of the time (10 flights, Jun 2025 to May 2026).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
- Short track record (10 flights), so its score leans on the airline's record at this hour.
Limited track record · 10 flights
Find United 502 fares Opens this date on Aviasales
#7 · American 2455
7:00 AM → 10:27 AM6h 27m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
On time (history)
84%
Cancelled
0.0%
Avg arrival delay
31 min
- Arrived on time 84% of the time (175 flights, Jun 2025 to May 2026).
- Never cancelled in 175 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 66%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Moderate track record · 175 flights
Find American 2455 fares Opens this date on Aviasales
#8 · American 373
9:30 AM → 1:12 PM6h 42m nonstop
Local times, typical schedule. Last flown 2026-04-06.
81%
chance on time
On time (history)
93%
Cancelled
0.0%
Avg arrival delay
19 min
- Arrived on time 93% of the time (30 flights, Jun 2025 to May 2026).
- Never cancelled in 30 scheduled flights.
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
- Short track record (30 flights), so its score leans on the airline's record at this hour.
Limited track record · 30 flights
Find American 373 fares Opens this date on Aviasales
#9 · American 2167
1:00 PM → 4:23 PM6h 23m nonstop
Local times, typical schedule. Last flown 2026-05-20.
80%
chance on time
On time (history)
93%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 93% of the time (14 flights, Jun 2025 to May 2026).
- Departs inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.
- Lands inside LAX's trouble window: 53% of its 15 ground stops and delay programs started between 4 PM and 10 PM.
- Short track record (14 flights), so its score leans on the airline's record at this hour.
Limited track record · 14 flights
Find American 2167 fares Opens this date on Aviasales
#10 · Delta 479
7:30 AM → 11:07 AM6h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
On time (history)
80%
Cancelled
1.9%
Avg arrival delay
14 min
- Arrived on time 80% of the time (356 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 66%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Strong track record · 356 flights
Find Delta 479 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

United Airlines77%
716 flights · 78% on time as flown · 1.2% cancel
JetBlue76%
1,622 flights · 77% on time as flown · 1.4% cancel
Delta Air Lines75%
1,224 flights · 76% on time as flown · 1.6% cancel
American Airlines73%
1,093 flights · 73% on time as flown · 1.3% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM84%
1,530 flights · avg delay 12 min
9 AM to noon81%
777 flights · avg delay 14 min
Noon to 3 PM76%
545 flights · avg delay 25 min
3 to 6 PM71%
567 flights · avg delay 29 min
6 to 9 PM66%
1,132 flights · avg delay 29 min

Best day: Wednesday (81%). Worst: Monday (75%).

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

What delays this route

Late-arriving aircraft43%
Airline (crew, maintenance, boarding)35%
Air traffic control and airport volume20%
Severe weather2%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

BOS to LAX questions

What time of day is best to fly BOS to LAX?: Before 9 AM: 84% of flights arrived on time, against 66% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from BOS to LAX?: United, with a season-adjusted 77% chance of operating and arriving on time over 716 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on BOS to LAX?: July (69% on time); the best was March (84%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?: No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from BOS

Live status: FAA delays and ground stops

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