Route on-time record
LAX to BOS: most on-time flights and the best time to fly
Los Angeles (Los Angeles International Airport) to Boston (Boston Logan International Airport). 4,659 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 1.4% were cancelled. The most reliable flight number was United 2210 at 10:42 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
LAX → BOS
Los Angeles to Boston: 4,659 nonstop flights a year
On time (12 months)
78%
Cancelled
1.4%
avg delay 18 min
Best time to leave
Before 9 AM
84% on time vs 66% 9 AM to noon
Most reliable airline
United
84% chance on time
Lowest nonstop fare seen in the next two months: $192 (American 2453 on 2026-10-26). 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 · United 2210
10:42 PM → 7:23 AM5h 41m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 89%
- Cancelled
- 1.4%
- Avg arrival delay
- 5 min
- Arrived on time 89% of the time (343 flights, Jun 2025 to May 2026).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
Strong track record · 343 flights
Find United 2210 fares Opens this date on Aviasales#2 · JetBlue 588
7:45 AM → 4:10 PM5h 25m nonstop
Local times, typical schedule. Last flown 2026-04-28.
86%
chance on time
- On time (history)
- 88%
- Cancelled
- 2.4%
- Avg arrival delay
- 6 min
- Arrived on time 88% of the time (163 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 9 AM to noon: 66%).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
- Lands inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.
Moderate track record · 163 flights
Find JetBlue 588 fares Opens this date on Aviasales#3 · Delta 507
9:15 PM → 5:32 AM5h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 86%
- Cancelled
- 3.0%
- Avg arrival delay
- 11 min
- Arrived on time 86% of the time (263 flights, Jun 2025 to May 2026).
- Departs inside LAX's trouble window: 53% of its 15 ground stops and delay programs started between 4 PM and 10 PM.
Strong track record · 263 flights
Find Delta 507 fares Opens this date on Aviasales#4 · United 1783
8:15 AM → 4:55 PM5h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
- On time (history)
- 83%
- Cancelled
- 0.8%
- Avg arrival delay
- 15 min
- Arrived on time 83% of the time (361 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 9 AM to noon: 66%).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
- Lands inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.
Strong track record · 361 flights
Find United 1783 fares Opens this date on Aviasales#5 · Delta 639
7:55 AM → 4:14 PM5h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
- On time (history)
- 84%
- Cancelled
- 2.2%
- Avg arrival delay
- 12 min
- Arrived on time 84% of the time (357 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 9 AM to noon: 66%).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
- Lands inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.
Strong track record · 357 flights
Find Delta 639 fares Opens this date on Aviasales#6 · JetBlue 488
9:40 PM → 6:15 AM5h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 13 min
- Arrived on time 84% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Departs inside LAX's trouble window: 53% of its 15 ground stops and delay programs started between 4 PM and 10 PM.
- 87% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 31 flights
Find JetBlue 488 fares Opens this date on Aviasales#7 · American 2453
11:30 PM → 8:04 AM5h 34m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 80%
- Cancelled
- 0.8%
- Avg arrival delay
- 15 min
- Arrived on time 80% of the time (351 flights, Jun 2025 to May 2026).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
Strong track record · 351 flights
Find American 2453 fares Opens this date on Aviasales#8 · American 538
2:30 PM → 10:59 PM5h 29m nonstop
Local times, typical schedule. Last flown 2026-03-28.
78%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.0%
- Avg arrival delay
- 16 min
- Arrived on time 81% of the time (21 flights, Jun 2025 to May 2026).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
- 70% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find American 538 fares Opens this date on Aviasales#9 · JetBlue 988
10:00 PM → 6:20 AM5h 27m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 78%
- Cancelled
- 1.8%
- Avg arrival delay
- 22 min
- Arrived on time 78% of the time (336 flights, Jun 2025 to May 2026).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
- 53% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 336 flights
Find JetBlue 988 fares Opens this date on Aviasales#10 · American 12
8:15 AM → 4:53 PM5h 38m nonstop
Local times, typical schedule. Last flown 2026-05-31.
76%
chance on time
- On time (history)
- 77%
- Cancelled
- 0.8%
- Avg arrival delay
- 17 min
- Arrived on time 77% of the time (362 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 9 AM to noon: 66%).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
- Lands inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.
Strong track record · 362 flights
Find American 12 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines84%
716 flights · 86% on time as flown · 1.2% cancel
- Delta Air Lines78%
1,226 flights · 79% on time as flown · 1.6% cancel
- American Airlines76%
1,094 flights · 76% on time as flown · 1.3% cancel
- JetBlue75%
1,623 flights · 76% 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%
1,512 flights · avg delay 12 min
- 9 AM to noon66%
707 flights · avg delay 26 min
- Noon to 3 PM73%
730 flights · avg delay 28 min
- 3 to 6 PM75%
290 flights · avg delay 24 min
- 6 to 9 PM82%
142 flights · avg delay 14 min
- After 9 PM83%
1,278 flights · avg delay 14 min
Best day: Tuesday (84%). Worst: Sunday (76%).
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 aircraft35%
- Airline (crew, maintenance, boarding)32%
- Air traffic control and airport volume29%
- Severe weather3%
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
LAX to BOS questions
- What time of day is best to fly LAX to BOS?
- Before 9 AM: 84% of flights arrived on time, against 66% for departures 9 AM to noon. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from LAX to BOS?
- United, with a season-adjusted 84% 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 LAX to BOS?
- June (74% on time); the best was November (85%), 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 LAX
- BOS to LAX (return)
- LAX to SFO 68%
- LAX to JFK 79%
- LAX to LAS 77%
- LAX to DEN 82%
- LAX to PHX 81%
- LAX to SEA 85%
- LAX to ORD 77%
- LAX to DFW 75%
- LAX to SMF 85%
- LAX to HNL 77%
- LAX to IAH 84%
- LAX to ATL 76%
Live status: FAA delays and ground stops