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

San Antonio, TX (SAT) to Detroit, MI (DTW) flight delay odds

Historically, 89.3% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 951 flights.

HISTORICAL ROUTE SIGNALLower disruption
89.3%arrived on time
6.3%30+ min late
0.7%cancelled
951scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.7%all scheduled flights
120+ minutes late1.8%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival-4.1 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 morning36594.0%3.3%1.1%
Late morning21189.6%6.6%0.5%
Afternoon37484.5%9.1%0.5%

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
Monday14687.7%6.2%0.7%
Tuesday14289.4%7.0%1.4%
Wednesday13890.6%5.1%0.7%
Thursday13989.9%5.0%0.0%
Friday14192.2%5.7%0.0%
Saturday10588.6%5.7%1.0%
Sunday14086.4%9.3%1.4%

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 Lines93489.2%6.3%0.7%
Spirit Airlines1794.1%5.9%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 20259283.7%6.5%2.2%
August 20259793.8%5.2%0.0%
September 20258292.7%3.7%0.0%
October 20258392.8%6.0%0.0%
November 20258394.0%4.8%0.0%
December 20258686.0%11.6%0.0%
January 20266484.4%10.9%1.6%
February 20265683.9%10.7%0.0%
March 20266288.7%4.8%1.6%
April 20267685.5%5.3%0.0%
May 20268788.5%5.7%2.3%
June 20268394.0%2.4%1.2%

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.

Airline52.7%
Late aircraft30.0%
National airspace15.8%
Weather0.8%
Security0.6%
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.