Route · BWI → GSP · 2020–2025 BTS data
Baltimore to Greer
The BWI–GSP corridor (Baltimore, MD → Greer, SC) runs behind the national average, served by 1 carrier across roughly 426 miles.
Data updated 2026-06-13
- 78.4%
- On-time
- -0.6 pts
- vs US avg
- 61 min
- Delay when late
- 2,270
- Flights
Cancelled
0.6%
Best Month
Sep 2025 92%
Worst Month
Jun 2025 63%
Distance
426 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 60 | 18 | 0 | 0 | WN |
| Nov 2025 | 56 | 6 | 0 | 0 | WN |
| Oct 2025 | 58 | 7 | 0 | 0 | WN |
| Sep 2025 | 60 | 5 | 0 | 0 | WN |
| Aug 2025 | 62 | 9 | 0 | 0 | WN |
| Jul 2025 | 62 | 17 | 1 | 0 | WN |
| Jun 2025 | 60 | 22 | 1 | 0 | WN |
| May 2025 | 62 | 21 | 0 | 0 | WN |
| Apr 2025 | 60 | 12 | 0 | 1 | WN |
| Mar 2025 | 60 | 10 | 0 | 0 | WN |
| Feb 2025 | 46 | 8 | 0 | 1 | WN |
| Jan 2025 | 45 | 11 | 2 | 0 | WN |
| Dec 2024 | 60 | 14 | 0 | 0 | WN |
| Nov 2024 | 57 | 6 | 0 | 0 | WN |
| Oct 2024 | 62 | 14 | 0 | 0 | WN |
| Sep 2024 | 60 | 11 | 1 | 0 | WN |
| Aug 2024 | 62 | 18 | 2 | 0 | WN |
| Jul 2024 | 62 | 22 | 0 | 1 | WN |
| Jun 2024 | 58 | 8 | 1 | 0 | WN |
| May 2024 | 34 | 14 | 0 | 0 | WN |
| Apr 2024 | 34 | 9 | 0 | 0 | WN |
| Mar 2024 | 35 | 2 | 0 | 0 | WN |
| Jan 2024 | 31 | 12 | 0 | 1 | WN |
| Dec 2023 | 33 | 7 | 0 | 0 | WN |
Cancellation Rate
0.6%
8 of 1,279 flights
Diversion Rate
0.3%
4 of 1,279 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BWI - Baltimore
Full on-time, delay-cause, and seasonal performance for Baltimore, MD.
Origin airport →GSP - Greer
Full on-time, delay-cause, and seasonal performance for Greer, SC.
Destination airport →Compare the two airports
See BWI and GSP side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to BWI–GSP.
Routes with a similar on-time rate
What the Data Says About BWI to GSP
The Baltimore to Greer corridor (BWI to GSP) posts a 78.4% on-time rate on the lower edge of the average band, based on 2,270 tracked flights. Late flights run 60.5 minutes behind on average. 1 carrier cover the 426-mile route; over the last 24 months, 8 of 1,279 flights were cancelled (0.6%) and 0.3% diverted.
The monthly split is wide on this route: Sep 2025 posted the strongest performance at 92% on-time, while Jun 2025 came in at just 63% - a 28-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.