Route on-time record

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

Houston (George Bush Intercontinental Airport) to Boston (Boston Logan International Airport). 2,035 nonstop flights in Jun 2025 to May 2026, 72% arrived within 15 minutes and 1.4% were cancelled. The most reliable flight number was United 1977 at 7:25 AM.

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

IAH → BOS

Houston to Boston: 2,035 nonstop flights a year

On time (12 months)

72%

Cancelled

1.4%

avg delay 22 min

Best time to leave

Before 9 AM

95% on time vs 61% 3 to 6 PM

Most reliable airline

United

75% chance on time

Check IAH to BOS fares

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 1977
7:25 AM → 12:16 PM3h 51m nonstop
Local times, typical schedule. Last flown 2026-05-31.
93%
chance on time
On time (history)
95%
Cancelled
0.8%
Avg arrival delay
4 min
- Arrived on time 95% of the time (360 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 95% on time; 3 to 6 PM: 61%).
- Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 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 · 360 flights
Find United 1977 fares Opens this date on Aviasales
#2 · United 2393
9:50 AM → 2:48 PM3h 58m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 2400; its record covers all of them.
75%
chance on time
On time (history)
75%
Cancelled
0.0%
Avg arrival delay
19 min
- Arrived on time 75% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 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 · 32 flights
Find United 2393 fares Opens this date on Aviasales
#3 · United 1331
1:45 PM → 6:28 PM3h 43m nonstop
Local times, typical schedule. Last flown 2026-03-28.
71%
chance on time
On time (history)
71%
Cancelled
0.0%
Avg arrival delay
23 min
- Arrived on time 71% of the time (24 flights, Jun 2025 to May 2026).
- Departs 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 1331 fares Opens this date on Aviasales
#4 · United 521
6:42 PM → 11:40 PM3h 58m nonstop
Local times, typical schedule. Last flown 2026-05-31.
71%
chance on time
On time (history)
71%
Cancelled
0.0%
Avg arrival delay
19 min
- Arrived on time 71% of the time (80 flights, Jun 2025 to May 2026).
- Never cancelled in 80 scheduled flights.
- Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).
Moderate track record · 80 flights
Find United 521 fares Opens this date on Aviasales
#5 · United 2136
11:55 AM → 4:52 PM3h 57m nonstop
Local times, typical schedule. Last flown 2026-04-29.
69%
chance on time
On time (history)
66%
Cancelled
0.0%
Avg arrival delay
17 min
- Arrived on time 66% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 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 · 32 flights
Find United 2136 fares Opens this date on Aviasales
#6 · United 2161
4:40 PM → 9:44 PM4h 04m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 1684; its record covers all of them.
69%
chance on time
On time (history)
69%
Cancelled
0.0%
Avg arrival delay
29 min
- Arrived on time 69% of the time (29 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 61% on time; Before 9 AM: 95%).
- Departs inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
- 56% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 29 flights
Find United 2161 fares Opens this date on Aviasales
#7 · United 592
4:52 PM → 9:46 PM3h 54m nonstop
Local times, typical schedule. Last flown 2026-04-29.
68%
chance on time
On time (history)
69%
Cancelled
0.0%
Avg arrival delay
14 min
- Arrived on time 69% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 61% on time; Before 9 AM: 95%).
- Departs inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
Limited track record · 32 flights
Find United 592 fares Opens this date on Aviasales
#8 · United 1957
12:10 PM → 5:07 PM3h 57m nonstop
Local times, typical schedule. Last flown 2026-05-31.
62%
chance on time
On time (history)
56%
Cancelled
0.0%
Avg arrival delay
24 min
- Arrived on time 56% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Departs inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
- Lands inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.
Limited track record · 32 flights
Find United 1957 fares Opens this date on Aviasales
#9 · United 1470
5:11 PM → 9:54 PM3h 43m nonstop
Local times, typical schedule. Last flown 2026-03-27.
59%
chance on time
On time (history)
44%
Cancelled
5.9%
Avg arrival delay
32 min
- Arrived on time 44% of the time (16 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 61% on time; Before 9 AM: 95%).
- Departs inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find United 1470 fares Opens this date on Aviasales
#10 · JetBlue 932
12:44 PM → 5:11 PM3h 52m nonstop
Local times, typical schedule. Last flown 2026-05-31.
56%
chance on time
On time (history)
58%
Cancelled
1.9%
Avg arrival delay
32 min
- Arrived on time 58% of the time (316 flights, Jun 2025 to May 2026).
- Departs inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
- Lands inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.
Strong track record · 316 flights
Find JetBlue 932 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

United Airlines75%
1,575 flights · 76% on time as flown · 1.2% cancel
JetBlue61%
460 flights · 60% on time as flown · 2.0% cancel

On time by departure time

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

Before 9 AM95%
363 flights · avg delay 4 min
9 AM to noon74%
366 flights · avg delay 18 min
Noon to 3 PM63%
572 flights · avg delay 29 min
3 to 6 PM61%
329 flights · avg delay 31 min
6 to 9 PM72%
405 flights · avg delay 22 min

Best day: Saturday (79%). Worst: Friday (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.

What delays this route

Air traffic control and airport volume46%
Late-arriving aircraft32%
Airline (crew, maintenance, boarding)16%
Severe weather5%

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

IAH to BOS questions

What time of day is best to fly IAH to BOS?: Before 9 AM: 95% of flights arrived on time, against 61% 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 IAH to BOS?: United, with a season-adjusted 75% chance of operating and arriving on time over 1,575 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 IAH to BOS?: July (63% on time); the best was February (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.

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