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Route on-time record

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

Boston (Boston Logan International Airport) to Houston (George Bush Intercontinental Airport). 2,036 nonstop flights in Jun 2025 to May 2026, 81% arrived within 15 minutes and 1.5% were cancelled. The most reliable flight number was United 226 at 7:25 AM.

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

BOS → IAH

Boston to Houston: 2,036 nonstop flights a year

On time (12 months)

81%

Cancelled

1.5%

avg delay 13 min

Best time to leave

Before 9 AM

91% on time vs 68% 3 to 6 PM

Most reliable airline

United

81% chance on time

Check BOS to IAH fares

Lowest nonstop fare seen in the next two months: $167 (JetBlue 2033 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. #1 · United 226

    7:25 AM → 10:57 AM4h 31m nonstop

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

    91%

    chance on time

    On time (history)
    93%
    Cancelled
    1.9%
    Avg arrival delay
    3 min
    • Arrived on time 93% of the time (356 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 68%).
    • 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 United 226 fares Opens this date on Aviasales

  2. #2 · United 1902

    9:41 AM → 1:07 PM4h 26m nonstop

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

    90%

    chance on time

    On time (history)
    94%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 94% of the time (53 flights, Jun 2025 to May 2026).
    • Never cancelled in 53 scheduled flights.
    • Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
    • Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.

    Limited track record · 53 flights

    Find United 1902 fares Opens this date on Aviasales

  3. #3 · United 1976

    1:30 PM → 4:58 PM4h 28m nonstop

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

    85%

    chance on time

    On time (history)
    87%
    Cancelled
    1.4%
    Avg arrival delay
    10 min
    • Arrived on time 87% of the time (273 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 IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.

    Strong track record · 273 flights

    Find United 1976 fares Opens this date on Aviasales

  4. #4 · United 230

    9:32 AM → 1:11 PM4h 39m nonstop

    Local times, typical schedule. Last flown 2026-03-28.

    85%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    13 min
    • Arrived on time 88% of the time (24 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).
    • Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
    • Short track record (24 flights), so its score leans on the airline's record at this hour.

    Limited track record · 24 flights

    Find United 230 fares Opens this date on Aviasales

  5. #5 · United 1251

    4:59 PM → 8:40 PM4h 41m nonstop

    Local times, typical schedule. Last flown 2026-03-27.

    79%

    chance on time

    On time (history)
    76%
    Cancelled
    0.0%
    Avg arrival delay
    35 min
    • Arrived on time 76% of the time (17 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (3 to 6 PM: 68% on time; Before 9 AM: 91%).
    • Departs inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.
    • Short track record (17 flights), so its score leans on the airline's record at this hour.

    Limited track record · 17 flights

    Find United 1251 fares Opens this date on Aviasales

  6. #6 · United 1183

    3:43 PM → 7:10 PM4h 27m nonstop

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

    75%

    chance on time

    On time (history)
    75%
    Cancelled
    1.4%
    Avg arrival delay
    17 min
    • Arrived on time 75% of the time (71 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (3 to 6 PM: 68% on time; Before 9 AM: 91%).
    • Departs inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.

    Moderate track record · 71 flights

    Find United 1183 fares Opens this date on Aviasales

  7. #7 · United 1392

    4:53 PM → 8:27 PM4h 34m nonstop

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

    73%

    chance on time

    On time (history)
    69%
    Cancelled
    0.0%
    Avg arrival delay
    21 min
    • Arrived on time 69% of the time (61 flights, Jun 2025 to May 2026).
    • Never cancelled in 61 scheduled flights.
    • Leaves in this route's least on-time window (3 to 6 PM: 68% on time; Before 9 AM: 91%).
    • Departs inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.

    Moderate track record · 61 flights

    Find United 1392 fares Opens this date on Aviasales

  8. #8 · JetBlue 2033

    8:30 AM → 11:52 AM4h 28m nonstop

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

    72%

    chance on time

    On time (history)
    72%
    Cancelled
    1.5%
    Avg arrival delay
    18 min
    • Arrived on time 72% of the time (317 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 68%).
    • Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).

    Strong track record · 317 flights

    Find JetBlue 2033 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines81%

    1,576 flights · 83% on time as flown · 1.6% cancel

  • JetBlue76%

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

On time by departure time

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

  • Before 9 AM91%

    658 flights · avg delay 5 min

  • 9 AM to noon87%

    357 flights · avg delay 8 min

  • Noon to 3 PM78%

    419 flights · avg delay 14 min

  • 3 to 6 PM68%

    602 flights · avg delay 25 min

Best day: Wednesday (82%). Worst: Friday (74%).

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
73
F
86
M
86
A
81
M
73
J
74
J
66
A
79
S
77
O
85
N
86
D
79

What delays this route

  • Late-arriving aircraft46%
  • Air traffic control and airport volume33%
  • Airline (crew, maintenance, boarding)20%
  • Severe weather1%

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 IAH questions

What time of day is best to fly BOS to IAH?
Before 9 AM: 91% of flights arrived on time, against 68% for departures 3 to 6 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 IAH?
United, with a season-adjusted 81% chance of operating and arriving on time over 1,576 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 IAH?
July (66% on time); the best was March (86%), 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