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

Boston, MA (BOS) to Detroit, MI (DTW) flight delay odds

Historically, 75.8% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 2,591 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
75.8%arrived on time
15.4%30+ min late
2.1%cancelled
2,591scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.0%all scheduled flights
120+ minutes late3.4%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+7.6 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 morning64790.1%5.3%2.5%
Late morning44487.8%7.7%1.8%
Afternoon82171.3%17.7%2.1%
Evening60060.3%27.3%2.0%
Night7955.7%27.8%2.5%

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
Monday39273.5%15.3%4.8%
Tuesday35579.7%11.5%2.3%
Wednesday35481.6%12.1%0.3%
Thursday38575.6%15.8%1.3%
Friday39074.1%15.4%2.1%
Saturday32679.4%12.9%0.9%
Sunday38968.1%23.7%2.8%

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 Lines1,71277.8%13.8%2.0%
JetBlue Airways72369.6%19.6%2.8%
Spirit Airlines15582.6%12.9%0.0%
Republic Airways1100.0%0.0%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202525064.4%25.2%3.2%
August 202525082.0%12.8%0.4%
September 202524584.9%10.2%0.4%
October 202527877.3%13.3%1.4%
November 202522877.6%16.7%1.3%
December 202519867.2%21.2%1.0%
January 202616769.5%18.0%7.8%
February 202615576.8%9.7%8.4%
March 202618182.3%11.6%1.7%
April 202620380.3%12.8%0.5%
May 202621576.7%12.1%0.5%
June 202622169.2%19.9%2.3%

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.

Airline34.1%
Late aircraft46.3%
National airspace17.2%
Weather2.3%
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.