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Route on-time record

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

Las Vegas (Harry Reid International Airport) to Boston (Boston Logan International Airport). 1,674 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 1.3% were cancelled. The most reliable flight number was JetBlue 478 at 6:00 AM.

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

Find me the most reliable flights fromtoonreturning(optional)

LAS → BOS

Las Vegas to Boston: 1,674 nonstop flights a year

On time (12 months)

75%

Cancelled

1.3%

avg delay 20 min

Best time to leave

After 9 PM

78% on time vs 72% 9 AM to noon

Most reliable airline

JetBlue

75% chance on time

Check LAS to BOS fares

Lowest nonstop fare seen in the next two months: $349 (JetBlue 778 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. #1 · JetBlue 478

    6:00 AM → 2:09 PM5h 09m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    81%

    chance on time

    On time (history)
    90%
    Cancelled
    0.0%
    Avg arrival delay
    3 min
    • Arrived on time 90% of the time (21 flights, Jun 2025 to May 2026).
    • Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 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.

    Limited track record · 21 flights

    Find JetBlue 478 fares Opens this date on Aviasales

  2. #2 · JetBlue 178

    2:30 PM → 10:40 PM5h 10m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    81%

    chance on time

    On time (history)
    84%
    Cancelled
    0.8%
    Avg arrival delay
    14 min
    • Arrived on time 84% of the time (129 flights, Jun 2025 to May 2026).
    • Departs inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.

    Moderate track record · 129 flights

    Find JetBlue 178 fares Opens this date on Aviasales

  3. #3 · Delta 373

    9:45 PM → 5:41 AM4h 56m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    79%

    chance on time

    On time (history)
    81%
    Cancelled
    2.4%
    Avg arrival delay
    13 min
    • Arrived on time 81% of the time (247 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (After 9 PM: 78% on time; 9 AM to noon: 72%).
    • Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 ground stops and delay programs started).

    Strong track record · 247 flights

    Find Delta 373 fares Opens this date on Aviasales

  4. #4 · JetBlue 2178

    9:50 PM → 6:00 AM5h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    79%

    chance on time

    On time (history)
    82%
    Cancelled
    2.0%
    Avg arrival delay
    24 min
    • Arrived on time 82% of the time (148 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (After 9 PM: 78% on time; 9 AM to noon: 72%).
    • Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 ground stops and delay programs started).

    Moderate track record · 148 flights

    Find JetBlue 2178 fares Opens this date on Aviasales

  5. #5 · JetBlue 1478

    10:33 AM → 6:45 PM5h 12m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    78%

    chance on time

    On time (history)
    82%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 82% of the time (67 flights, Jun 2025 to May 2026).
    • Never cancelled in 67 scheduled flights.
    • Leaves in this route's least on-time window (9 AM to noon: 72% on time; After 9 PM: 78%).
    • Departs inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.

    Moderate track record · 67 flights

    Find JetBlue 1478 fares Opens this date on Aviasales

  6. #6 · JetBlue 278

    12:24 PM → 8:35 PM5h 11m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    76%

    chance on time

    On time (history)
    79%
    Cancelled
    1.5%
    Avg arrival delay
    18 min
    • Arrived on time 79% of the time (193 flights, Jun 2025 to May 2026).
    • Departs inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.

    Moderate track record · 193 flights

    Find JetBlue 278 fares Opens this date on Aviasales

  7. #7 · JetBlue 778

    10:10 PM → 6:09 AM4h 59m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    71%

    chance on time

    On time (history)
    71%
    Cancelled
    2.2%
    Avg arrival delay
    20 min
    • Arrived on time 71% of the time (223 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (After 9 PM: 78% on time; 9 AM to noon: 72%).
    • Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 ground stops and delay programs started).
    • 61% of its delay minutes came from the plane arriving late from an earlier flight.

    Strong track record · 223 flights

    Find JetBlue 778 fares Opens this date on Aviasales

  8. #8 · JetBlue 1178

    12:00 PM → 8:09 PM5h 09m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    70%

    chance on time

    On time (history)
    67%
    Cancelled
    0.0%
    Avg arrival delay
    29 min
    • Arrived on time 67% of the time (154 flights, Jun 2025 to May 2026).
    • Never cancelled in 158 scheduled flights.
    • Departs inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.

    Moderate track record · 154 flights

    Find JetBlue 1178 fares Opens this date on Aviasales

  9. #9 · Delta 498

    10:35 AM → 6:40 PM5h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    68%

    chance on time

    On time (history)
    64%
    Cancelled
    0.0%
    Avg arrival delay
    19 min
    • Arrived on time 64% of the time (25 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (9 AM to noon: 72% on time; After 9 PM: 78%).
    • Departs inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.

    Limited track record · 25 flights

    Find Delta 498 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • JetBlue75%

    1,052 flights · 75% on time as flown · 1.2% cancel

  • Delta Air Lines74%

    622 flights · 76% on time as flown · 1.4% cancel

On time by departure time

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

  • 9 AM to noon72%

    604 flights · avg delay 24 min

  • Noon to 3 PM76%

    375 flights · avg delay 21 min

  • 3 to 6 PM76%

    61 flights · avg delay 19 min

  • After 9 PM78%

    566 flights · avg delay 16 min

Best day: Tuesday (84%). Worst: Sunday (68%).

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.

J
81
F
78
M
81
A
82
M
77
J
65
J
60
A
70
S
72
O
76
N
85
D
81

What delays this route

  • Air traffic control and airport volume36%
  • Late-arriving aircraft33%
  • Airline (crew, maintenance, boarding)28%
  • 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

Finding the most reliable connections from LAS to BOS…

LAS to BOS questions

What time of day is best to fly LAS to BOS?
After 9 PM: 78% of flights arrived on time, against 72% for departures 9 AM to noon.
Which airline is most on time from LAS to BOS?
JetBlue, with a season-adjusted 75% chance of operating and arriving on time over 1,052 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 LAS to BOS?
July (60% 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.

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Live status: FAA delays and ground stops