GRR to BWI flight delays
Grand Rapids, MI (GRR) Baltimore, MD (BWI) · 528 miles
432 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
81.32%
Arrived on time
Within 15 minutes of schedule
1.39%
Cancelled
Share of scheduled flights
56 min
When late, late by
Average across delayed arrivals
12 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In April it ran 24.4 points more punctual than in September — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The two directions do not behave alike. BWI to GRR arrives on time 6.1 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Only Southwest Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
This is a thin route — 432 flights across the whole period. On a route this infrequent a cancellation is far more costly than the rate suggests, because the next departure may not be the same day.
Which airline should you fly on this route?
Over January 2025 – August 2026, Southwest Airlines arrived on time most often on GRR to BWI. Flights ran closest to schedule in April and worst in September.
Every airline on GRR to BWI
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 432 | 81.32% | 1.39% | 56 min | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
BWI to GRR Baltimore back to Grand Rapids 75.18% on time COther routes from Grand Rapids
Common questions
Are flights from Grand Rapids to Baltimore usually delayed?
81.32% of flights on the GRR to BWI route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airlines fly from Grand Rapids to Baltimore?
Only Southwest Airlines appears in the published record on this route, with 432 flights and 81.32% arriving on time.
How often are GRR to BWI flights cancelled?
1.39% of scheduled flights did not operate — about 14 in every thousand. That is in the normal range.
What is the best month to fly Grand Rapids to Baltimore?
April, when 94.4% of flights arrived on time. The worst was September at 70%.
When GRR to BWI flights are late, how late are they?
About 56 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on GRR to BWI during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →