Route
AUS → BOS
Austin Bergstrom International Airport Boston Logan International Airport
How punctual is this route?
- On-time arrivals
- 64.5%
- Less than 15 minutes late
- Cancelled
- 2.7%
- Of scheduled flights
- Average delay when late
- 83 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,713
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 35%
- Late-arriving aircraft 34%
- Airline (crew, maintenance, cleaning) 30%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 60.7% | 137 |
| October 2025 | 53.3% | 151 |
| November 2025 | 64.8% | 131 |
| December 2025 | 66.4% | 125 |
| January 2026 | 73.3% | 98 |
| February 2026 | 65.7% | 119 |
| March 2026 | 57.6% | 145 |
| April 2026 | 65.7% | 138 |
| May 2026 | 74.5% | 145 |
| June 2026 | 70.8% | 162 |
| July 2026 | 60.1% | 181 |
| August 2026 | 64.8% | 181 |
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 |
|---|---|---|---|---|
| Delta Air Lines | 1,001 | 69.6% | 2.7% | 94 min |
| JetBlue Airways | 426 | 59.0% | 3.3% | 85 min |
| Southwest Airlines | 286 | 54.8% | 1.7% | 55 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
DL2098
12% late · 364 flights
-
DL1156
46% late · 306 flights
-
B61138
44% late · 191 flights
-
DL2088
27% late · 187 flights
-
DL1297
46% late · 125 flights
-
B61238
28% late · 103 flights
-
B6638
44% late · 82 flights
-
B6592
55% late · 49 flights
-
WN1898
38% late · 45 flights
-
WN551
53% late · 32 flights
-
WN1051
81% late · 28 flights
-
WN639
33% late · 27 flights
-
WN528
62% late · 26 flights
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