BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
BOSAUS

Boston, MA (BOS) to Austin, TX (AUS) flight delay odds

Historically, 70.6% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,634 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
70.6%arrived on time
19.5%30+ min late
2.0%cancelled
1,634scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.8%all scheduled flights
120+ minutes late3.8%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+10.3 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Early morning53783.1%9.7%1.5%
Late morning5782.5%14.0%0.0%
Afternoon71865.6%22.8%1.5%
Evening32258.7%29.2%4.0%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday25268.7%16.7%4.8%
Tuesday24372.0%18.1%2.5%
Wednesday23473.9%16.2%0.4%
Thursday24671.1%19.9%1.6%
Friday25072.0%20.4%0.4%
Saturday17171.9%18.7%1.8%
Sunday23864.7%26.1%2.1%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines98872.8%17.9%2.6%
JetBlue Airways36471.2%17.9%1.1%
Southwest Airlines28262.1%27.0%0.7%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 202514265.5%21.8%2.8%
August 202514167.4%24.1%0.0%
September 202513765.0%27.7%0.7%
October 202515170.2%19.9%0.7%
November 202513172.5%20.6%0.8%
December 202512568.0%20.0%2.4%
January 20269865.3%21.4%7.1%
February 202611973.9%14.3%7.6%
March 202614575.2%15.2%3.4%
April 202613881.2%14.5%0.0%
May 202614570.3%18.6%0.0%
June 202616271.0%16.0%0.6%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline41.2%
Late aircraft34.0%
National airspace22.8%
Weather1.9%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.