Route · GSP → BWI · 2020–2025 BTS data
Greer to Baltimore
The GSP–BWI corridor (Greer, SC → Baltimore, MD) runs ahead of the national average, served by 1 carrier across roughly 426 miles.
Data updated 2026-06-13
- 85%
- On-time
- +6 pts
- vs US avg
- 62 min
- Delay when late
- 2,270
- Flights
Cancelled
0.6%
Best Month
Sep 2025 95%
Worst Month
Aug 2024 63%
Distance
426 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 60 | 8 | 1 | 0 | WN |
| Nov 2025 | 56 | 6 | 0 | 0 | WN |
| Oct 2025 | 58 | 3 | 0 | 0 | WN |
| Sep 2025 | 60 | 3 | 0 | 0 | WN |
| Aug 2025 | 62 | 8 | 0 | 0 | WN |
| Jul 2025 | 62 | 17 | 1 | 0 | WN |
| Jun 2025 | 60 | 14 | 0 | 0 | WN |
| May 2025 | 62 | 15 | 0 | 0 | WN |
| Apr 2025 | 60 | 10 | 0 | 0 | WN |
| Mar 2025 | 60 | 8 | 0 | 1 | WN |
| Feb 2025 | 46 | 9 | 0 | 0 | WN |
| Jan 2025 | 45 | 4 | 3 | 0 | WN |
| Dec 2024 | 60 | 15 | 0 | 1 | WN |
| Nov 2024 | 57 | 5 | 0 | 0 | WN |
| Oct 2024 | 62 | 8 | 0 | 0 | WN |
| Sep 2024 | 60 | 10 | 2 | 0 | WN |
| Aug 2024 | 62 | 23 | 1 | 0 | WN |
| Jul 2024 | 62 | 14 | 0 | 0 | WN |
| Jun 2024 | 58 | 3 | 0 | 0 | WN |
| May 2024 | 34 | 11 | 0 | 1 | WN |
| Apr 2024 | 34 | 8 | 0 | 0 | WN |
| Mar 2024 | 35 | 4 | 0 | 0 | WN |
| Jan 2024 | 31 | 4 | 0 | 0 | WN |
| Dec 2023 | 33 | 8 | 0 | 0 | WN |
Cancellation Rate
0.6%
8 of 1,279 flights
Diversion Rate
0.2%
3 of 1,279 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
GSP - Greer
Full on-time, delay-cause, and seasonal performance for Greer, SC.
Origin airport →BWI - Baltimore
Full on-time, delay-cause, and seasonal performance for Baltimore, MD.
Destination airport →Compare the two airports
See GSP and BWI side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to GSP–BWI.
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What the Data Says About GSP to BWI
Greer to Baltimore (GSP to BWI) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85% on-time rate across 2,270 flights, with delays that do happen averaging 62.2 minutes. The corridor runs roughly 426 miles and is served by 1 carrier. Over the most recent 24 months, 8 of 1,279 flights were cancelled (0.6%) and 3 diverted (0.2%).
The monthly split is wide on this route: Sep 2025 posted the strongest performance at 95% on-time, while Aug 2024 came in at just 63% - a 32-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.