Route · GSP → PHL · 2020–2025 BTS data
Greer to Philadelphia
The GSP–PHL corridor (Greer, SC → Philadelphia, PA) runs ahead of the national average, served by 4 carriers across roughly 515 miles.
Data updated 2026-06-13
- 85.5%
- On-time
- +6.5 pts
- vs US avg
- 97 min
- Delay when late
- 2,248
- Flights
Cancelled
2.2%
Best Month
Sep 2025 97%
Worst Month
Jul 2024 69%
Distance
515 mi
Carriers
4
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 31 | 6 | 1 | 0 | OH |
| Nov 2025 | 30 | 3 | 1 | 0 | OH |
| Oct 2025 | 36 | 2 | 0 | 0 | OH |
| Sep 2025 | 76 | 2 | 0 | 0 | OH |
| Aug 2025 | 31 | 5 | 0 | 0 | AA,OH |
| Jul 2025 | 31 | 7 | 0 | 0 | OH |
| Jun 2025 | 34 | 6 | 0 | 0 | OH |
| May 2025 | 57 | 14 | 3 | 0 | OH |
| Apr 2025 | 31 | 2 | 0 | 0 | OH |
| Mar 2025 | 45 | 8 | 1 | 0 | OH |
| Feb 2025 | 44 | 10 | 3 | 0 | OH |
| Jan 2025 | 31 | 3 | 2 | 0 | OH |
| Nov 2024 | 33 | 3 | 0 | 0 | YX,OH |
| Oct 2024 | 41 | 0 | 0 | 0 | OH |
| Sep 2024 | 33 | 3 | 0 | 0 | YX,OH |
| Aug 2024 | 61 | 9 | 7 | 0 | YX,OH |
| Jul 2024 | 61 | 19 | 2 | 0 | OH,YX |
| Jun 2024 | 60 | 8 | 1 | 0 | OH,YX |
| May 2024 | 81 | 15 | 0 | 0 | OH |
| Apr 2024 | 33 | 3 | 0 | 0 | OH,YX |
| Mar 2024 | 62 | 6 | 0 | 0 | OH,YX |
| Feb 2024 | 44 | 4 | 1 | 0 | OH,YX |
| Jan 2024 | 37 | 7 | 1 | 0 | YX,OH |
| Dec 2023 | 38 | 4 | 0 | 0 | OH,YX |
Cancellation Rate
2.2%
23 of 1,061 flights
Diversion Rate
0.0%
0 of 1,061 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 →PHL - Philadelphia
Full on-time, delay-cause, and seasonal performance for Philadelphia, PA.
Destination airport →Compare the two airports
See GSP and PHL 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–PHL.
Routes with a similar on-time rate
What the Data Says About GSP to PHL
Greer to Philadelphia (GSP to PHL) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.5% on-time rate across 2,248 flights, with delays that do happen averaging 96.6 minutes. The corridor runs roughly 515 miles and is served by 4 carriers. Over the most recent 24 months, 23 of 1,061 flights were cancelled (2.2%) and 0 diverted (0.0%).
The monthly split is wide on this route: Sep 2025 posted the strongest performance at 97% on-time, while Jul 2024 came in at just 69% - a 29-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from GSP to PHL? ▼
What is the cancellation rate for GSP to PHL? ▼
How far is the flight from GSP to PHL? ▼
When is the best time to fly from GSP to PHL? ▼
Flight Guides
Tips and data-driven advice for choosing reliable routes.
Explore PlainFlights
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.