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

Grand Rapids, MI (GRR) to Detroit, MI (DTW) flight delay odds

Historically, 77.5% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,588 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
77.5%arrived on time
17.0%30+ min late
0.9%cancelled
1,588scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late12.0%all scheduled flights
120+ minutes late6.7%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+13.7 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 morning43082.1%11.9%1.4%
Late morning23678.0%16.1%1.3%
Afternoon54977.2%17.3%0.4%
Evening37372.1%23.1%1.1%

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
Monday23375.5%17.6%1.7%
Tuesday23474.8%20.5%0.4%
Wednesday23077.8%17.0%0.9%
Thursday23181.0%14.7%0.0%
Friday22876.8%16.7%1.8%
Saturday20382.8%12.3%1.0%
Sunday22974.2%19.7%0.9%

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
SkyWest Airlines1,50676.9%17.5%1.0%
Republic Airways6590.8%6.2%0.0%
Delta Air Lines1776.5%11.8%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 20259368.8%24.7%1.1%
August 20259387.1%11.8%0.0%
September 20258992.1%6.7%0.0%
October 202518789.3%5.9%0.0%
November 202519280.7%13.0%1.6%
December 202512549.6%39.2%1.6%
January 20269756.7%38.1%0.0%
February 202610373.8%17.5%1.0%
March 202616662.7%27.1%3.0%
April 202613983.5%10.8%1.4%
May 202618687.1%10.2%0.5%
June 202611889.8%9.3%0.0%

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.

Airline67.4%
Late aircraft0.2%
National airspace10.0%
Weather22.4%
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.