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

Grand Rapids, MI (GRR) to Baltimore, MD (BWI) flight delay odds

79.6% of 432 official scheduled GRR-to-BWI flights arrived on time; 10.4% arrived at least 30 minutes late and 1.4% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
79.6%arrived on time
10.4%30+ min late
1.4%cancelled
432scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.9%all scheduled flights
120+ minutes late2.3%all scheduled flights
Diverted0.7%did not reach as scheduled
Average arrival+2.9 mincompleted flights

Which departure time was most reliable for GRR to BWI?

Among qualifying GRR-to-BWI departure window results, Early morning had the highest on-time rate: 94.5% of 127 flights. Afternoon was lowest at 74.1% across 274 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning12794.5%2.4%0.8%
Afternoon27474.1%13.5%0.7%

Which weekday was most reliable for GRR to BWI?

Among qualifying GRR-to-BWI weekday results, Saturday had the highest on-time rate: 87.5% of 64 flights. Monday was lowest at 70.5% across 61 flights.

DayFlightsOn time30+ minCancelled
Monday6170.5%8.2%3.3%
Tuesday6287.1%9.7%0.0%
Wednesday6083.3%3.3%0.0%
Thursday6177.0%13.1%1.6%
Friday6071.7%15.0%0.0%
Saturday6487.5%12.5%0.0%
Sunday6479.7%10.9%4.7%

Which airline was most reliable for GRR to BWI?

Only Southwest Airlines met the GRR-to-BWI airline threshold: 79.6% of 432 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines43279.6%10.4%1.4%

Which month was most reliable for GRR to BWI?

Among qualifying GRR-to-BWI month results, April 2026 had the highest on-time rate: 94.4% of 36 flights. February 2026 was lowest at 67.9% across 28 flights.

MonthFlightsOn time30+ minCancelled
July 20255379.2%11.3%5.7%
August 20253375.8%9.1%0.0%
September 20253070.0%20.0%0.0%
October 20253180.6%12.9%0.0%
November 20253080.0%20.0%0.0%
December 20253183.9%12.9%0.0%
January 20263174.2%3.2%3.2%
February 20262867.9%3.6%3.6%
March 20263174.2%12.9%0.0%
April 20263694.4%2.8%0.0%
May 20264192.7%4.9%0.0%
June 20265777.2%12.3%1.8%

What drove GRR to BWI delay minutes?

Late aircraft was the largest recorded GRR-to-BWI delay category, accounting for 56.4% of 4,401 BTS-attributed delay minutes during July 2025–June 2026.

Airline22.7%
Late aircraft56.4%
National airspace20.7%
Weather0.3%
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.