79% of flights from Grand Rapids to Baltimore arrived on time over the past 12 months. That is about the typical U.S. route. 6% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for GRR → BWI: when a flight was late, it was under 45 minutes late 65% of the time. About 1 in 24 flights landed an hour or more late, and 1 in 58 three hours or more; 0.9% were cancelled outright.
- On time or early79%
- 15–30 min late8.4%
- 30–60 min late5.8%
- 1–2 hours late1.3%
- 2–3 hours late1.1%
- 3+ hours late1.7%
- Diverted1.3%
- Cancelled0.9%
Share of all 462 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Southwest Airlines | 461 | 79% | 0.9% | −7 min | 4.1% | +65 min | Southwest Airlines |
| Delta Air Lines | 1 | — | — | — | — | — | Endeavor Air |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at GRR). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | Southwest Airlines |
|---|---|
| 3 p.m. | 75% |
By month
Each calendar month pooled over 2023–2026. Best: May (79%). Worst: August (75%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 67 | — | — |
| Tuesday | 60 | — | — |
| Wednesday | 60 | — | — |
| Thursday | 65 | — | — |
| Friday | 65 | — | — |
| Saturday | 72 | — | — |
| Sunday | 73 | — | — |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 3 · airline 1
Month by month
Not enough months with data to draw a trend.
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Grand Rapids or Baltimore. None has been clearly more reliable than GRR → BWI.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| GRR → BWI (this route) | 462 | 79% | 0.9% |
| GRR → DCA Gerald R. Ford to Washington Reagan National | 728 | 63% | 4.3% |
Questions
How often are flights from GRR to BWI on time?
79% of 462 scheduled flights from Grand Rapids, MI to Baltimore, MD arrived within 15 minutes of schedule between September 2025 and August 2026. 0.9% were cancelled.
What month has the most delays from GRR to BWI?
August (75% on time). The best month is May (79%), over 2023–2026.
Related
- BWI → GRR (return)
- Gerald R. Ford (GRR) delays by hour
- Flights into Baltimore/Washington (BWI)
- Southwest Airlines on-time record
- Delta Air Lines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.