Route · BWI → GSP · 2020–2025 BTS data
Baltimore to Greer
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BWI to GSP (Baltimore to Greer) ranks #3654 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 78.4%
- On-time
- -0.6 pts
- vs US avg
- 61 min
- Delay when late
- 2,270
- Flights
- #3654 of 4927
- Corpus placement
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 |
BWI–GSP seasonal on-time pattern
Best: March (86.3%) · weakest: July (69.4%)
Strongest calendar month
March
86.3% on-time · ~37 flights/mo
Busiest calendar month
July
~47 flights/mo avg
Weakest calendar month
July
69.4% on-time · ~47 flights/mo
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.
BWI on-time profileGSP - Greer
Full on-time, delay-cause, and seasonal performance for Greer, SC.
GSP on-time profileCompare the two airports
See BWI and GSP side by side on delays, cancellations, and reliability.
Compare BWI vs GSPOrigin-hub reliability standing
Mid-pack among BWI departures
From BWI, this corridor sits with 53 other 75–85% on-time routes out of 64 tracked departures, not the hub's reliability leaders (0 at ≥85%) and not the softest ( 11 below 75%). Destination: Greer · fleet on-time rank #3709 of 4927.
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.
On the multi-year calendar, BWI–GSP peaks in March at 86.3% on-time while July carries the heaviest traffic (~47 flights per month) ; the softest month is July at 69.4%, a 16.9-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does BWI to GSP rank among US routes by traffic? ▼
How often are flights delayed from BWI to GSP? ▼
What is the cancellation rate for BWI to GSP? ▼
How far is the flight from BWI to GSP? ▼
When is the best time to fly from BWI to GSP? ▼
Airports on this route
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.
Using BWI–GSP data
BWI–GSP is mid-pack at 78.4% on-time; month and carrier mix move more than the corridor headline.
- Compare BWI and GSP airport profiles: delay causes and top routes differ even on the same corridor. BWI airport
- If your dates flex, March (86.3% on-time) beats July (69.4%) on this corridor. Seasonal chart
- 4 other routes post a similar 78.4% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.