Route
IAH → BOS
George Bush Intercontinental Airport Boston Logan International Airport
How punctual is this route?
- On-time arrivals
- 71.5%
- Less than 15 minutes late
- Cancelled
- 1.5%
- Of scheduled flights
- Average delay when late
- 81 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,017
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 47%
- Late-arriving aircraft 31%
- Airline (crew, maintenance, cleaning) 18%
- Extreme weather 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 57.3% | 158 |
| October 2025 | 56.4% | 189 |
| November 2025 | 76.6% | 189 |
| December 2025 | 86.3% | 175 |
| January 2026 | 85.3% | 115 |
| February 2026 | 88.4% | 123 |
| March 2026 | 76.9% | 148 |
| April 2026 | 73.5% | 151 |
| May 2026 | 72.5% | 178 |
| June 2026 | 67.9% | 187 |
| July 2026 | 59.7% | 210 |
| August 2026 | 71.0% | 194 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| United Airlines | 1,549 | 76.1% | 1.1% | 76 min |
| JetBlue Airways | 468 | 55.9% | 2.8% | 91 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA1977
6% late · 361 flights
-
B6932
42% late · 341 flights
-
UA1076
22% late · 156 flights
-
UA521
31% late · 153 flights
-
UA1957
42% late · 103 flights
-
UA2393
17% late · 102 flights
-
B61632
61% late · 82 flights
-
UA2161
36% late · 81 flights
-
UA2439
29% late · 76 flights
-
UA1507
9% late · 58 flights
-
UA1318
70% late · 55 flights
-
UA800
45% late · 55 flights
-
B61432
32% late · 41 flights
-
UA350
32% late · 37 flights
-
UA1429
25% late · 36 flights
-
UA2136
34% late · 32 flights
-
UA592
31% late · 32 flights
-
UA1486
13% late · 30 flights
-
UA1331
29% late · 24 flights
-
UA1226
19% late · 21 flights
-
UA1478
0% late · 21 flights
-
UA1752
6% late · 21 flights
-
UA2400
19% late · 21 flights
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