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2,053 km · Domestic

Denver (DEN) – Greenville-Spartanburg (GSP)

In July 2026, 60 flights operated between Denver and Greenville-Spartanburg (both directions), and 75.0% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January6058▼ 3.3%
February56560.0%
March6258▼ 6.5%
April5960▲ 1.7%
May62620.0%
June7660▼ 21.1%
July7860▼ 23.1%
August66––
September60––
October62–in progress
November60––
December62––
Year to date (Jan–Jul)453414▼ 8.6%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January95.0%86.2%▼ 9.3%
February96.4%91.1%▼ 5.5%
March95.2%86.2%▼ 9.5%
April94.9%95.0%▲ 0.1%
May82.3%91.9%▲ 11.7%
June77.6%76.7%▼ 1.2%
July71.8%75.0%▲ 4.5%
August84.8%––
September88.3%––
October85.5%–in progress
November91.7%––
December83.9%––
Year-to-date average (Jan–Jul)87.6%86.0%▼ 1.8%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January24▲ 100.0%
February00–
March04–
April10▼ 100.0%
May00–
June00–
July00–
August0––
September0––
October0–in progress
November0––
December0––
Year to date (Jan–Jul)38▲ 166.7%

Airlines on this route

  1. SkyWest Airlines 53.9%
  2. United Airlines 43.4%
  3. Southwest Airlines 2.7%

Oct 1, 2024 – Jul 31, 2026

By direction

DEN → GSP

Scheduled flights
675
Flights operated
670
Cancelled
5 · 0.7%
On-time departures
89.0%

GSP → DEN

Scheduled flights
675
Flights operated
668
Cancelled
7 · 1.0%
On-time departures
85.2%

DEN → GSP and GSP → DEN counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
SkyWest Airlines OO 728 53.9% 91.2% 12
United Airlines UA 586 43.4% 83.3% 0
Southwest Airlines WN 36 2.7% 66.7% 0

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay10:00–11:002.8min · 543 recorded · 538 measured
Gap to highest-delay hour3.4min10:00 ↔ 16:00
Recorded flights1,350DEN–GSP

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 2 recorded · 2 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 132 recorded · 132 measured · Source: the US BTS 10:00 · 88.7% · 543 recorded · 538 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 9 recorded · 9 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · 86.1% · 655 recorded · 648 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 9 recorded · 9 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 2 recorded · 2 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 132 recorded · 132 measured · Source: the US BTS 10:00 · 2.8 min · 543 recorded · 538 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 9 recorded · 9 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · 6.3 min · 655 recorded · 648 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 9 recorded · 9 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · 2 · 2 recorded · 2 measured · Source: the US BTS 09:00 · 132 · 132 recorded · 132 measured · Source: the US BTS 10:00 · 543 · 543 recorded · 538 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · 9 · 9 recorded · 9 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · 655 · 655 recorded · 648 measured · Source: the US BTS 17:00 · 9 · 9 recorded · 9 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00No observations———
06:00No observations———
07:00No observations———
08:00Fewer than 200 measured departures—22
09:00Fewer than 200 measured departures—132132
10:0088.7%2.8 min538543
11:00No observations———
12:00No observations———
13:00No observations———
14:00Fewer than 200 measured departures—99
15:00No observations———
16:0086.1%6.3 min648655
17:00Fewer than 200 measured departures—99
18:00No observations———
19:00No observations———
20:00No observations———
21:00No observations———
22:00No observations———
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · Fewer than 200 measured departures · 188 recorded · 188 measured · Source: the US BTS Tuesday · Fewer than 200 measured departures · 188 recorded · 188 measured · Source: the US BTS Wednesday · Fewer than 200 measured departures · 188 recorded · 188 measured · Source: the US BTS Thursday · Fewer than 200 measured departures · 186 recorded · 186 measured · Source: the US BTS Friday · Fewer than 200 measured departures · 190 recorded · 184 measured · Source: the US BTS Saturday · 87.6% · 204 recorded · 202 measured · Source: the US BTS Sunday · 80.7% · 206 recorded · 202 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · Fewer than 200 measured departures · 188 recorded · 188 measured · Source: the US BTS Tuesday · Fewer than 200 measured departures · 188 recorded · 188 measured · Source: the US BTS Wednesday · Fewer than 200 measured departures · 188 recorded · 188 measured · Source: the US BTS Thursday · Fewer than 200 measured departures · 186 recorded · 186 measured · Source: the US BTS Friday · Fewer than 200 measured departures · 190 recorded · 184 measured · Source: the US BTS Saturday · 5.1 min · 204 recorded · 202 measured · Source: the US BTS Sunday · 6.6 min · 206 recorded · 202 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 188 · 188 recorded · 188 measured · Source: the US BTS Tuesday · 188 · 188 recorded · 188 measured · Source: the US BTS Wednesday · 188 · 188 recorded · 188 measured · Source: the US BTS Thursday · 186 · 186 recorded · 186 measured · Source: the US BTS Friday · 190 · 190 recorded · 184 measured · Source: the US BTS Saturday · 204 · 204 recorded · 202 measured · Source: the US BTS Sunday · 206 · 206 recorded · 202 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
MondayFewer than 200 measured departures—188188
TuesdayFewer than 200 measured departures—188188
WednesdayFewer than 200 measured departures—188188
ThursdayFewer than 200 measured departures—186186
FridayFewer than 200 measured departures—184190
Saturday87.6%5.1 min202204
Sunday80.7%6.6 min202206

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 124 · 124 recorded · 118 measured · Source: the US BTS Feb · 112 · 112 recorded · 112 measured · Source: the US BTS Mar · 124 · 124 recorded · 120 measured · Source: the US BTS Apr · 120 · 120 recorded · 119 measured · Source: the US BTS May · 124 · 124 recorded · 124 measured · Source: the US BTS Jun · 136 · 136 recorded · 136 measured · Source: the US BTS Jul · 138 · 138 recorded · 138 measured · Source: the US BTS Aug · 66 · 66 recorded · 66 measured · Source: the US BTS Sep · 60 · 60 recorded · 60 measured · Source: the US BTS Oct · 102 · 102 recorded · 102 measured · Source: the US BTS Nov · 120 · 120 recorded · 119 measured · Source: the US BTS Dec · 124 · 124 recorded · 124 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

No bucket in this view has 200 measured departures yet. Flight counts are shown; on-time and delay charts become available when the sample is large enough.

View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
JanFewer than 200 measured departures—118124
FebFewer than 200 measured departures—112112
MarFewer than 200 measured departures—120124
AprFewer than 200 measured departures—119120
MayFewer than 200 measured departures—124124
JunFewer than 200 measured departures—136136
JulFewer than 200 measured departures—138138
AugFewer than 200 measured departures—6666
SepFewer than 200 measured departures—6060
OctFewer than 200 measured departures—102102
NovFewer than 200 measured departures—119120
DecFewer than 200 measured departures—124124

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 86.3% 1,165
  • Delayed >15 min 12.8% 173
  • Cancelled 0.9% 12
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

13
13 of 13
Flight numbersBy direction DeparturesOn time
OO5939 DEN → GSP 335 91.8%
OO5892 GSP → DEN 334 89.9%
UA1519 GSP → DEN 68 82.4%
UA1786 DEN → GSP 60 81.7%
UA1232 DEN → GSP 37 89.2%
UA1451 DEN → GSP 37 86.5%
UA1866 GSP → DEN 36 66.7%
UA1944 GSP → DEN 36 100.0%
UA2342 DEN → GSP 36 83.3%
UA2696 GSP → DEN 36 66.7%
UA2080 GSP → DEN 35 71.4%
UA397 DEN → GSP 35 88.6%
UA1402 DEN → GSP 31 83.9%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 60 −23.1% 0 75.0%
June 2026 60 −21.1% 0 76.7%
May 2026 62 +0.0% 0 91.9%
April 2026 60 +1.7% 0 95.0%
March 2026 58 −6.5% 4 86.2%
February 2026 56 +0.0% 0 91.1%
January 2026 58 −3.3% 4 86.2%
December 2025 62 +0.0% 0 83.9%
November 2025 60 +1.7% 0 91.7%
October 2025 62 +55.0% 0 85.5%
September 2025 60 0 88.3%
August 2025 66 0 84.8%
July 2025 78 0 71.8%
June 2025 76 0 77.6%
May 2025 62 0 82.3%
April 2025 59 1 94.9%
March 2025 62 0 95.2%
February 2025 56 0 96.4%
January 2025 60 2 95.0%
December 2024 62 0 95.2%
November 2024 59 1 86.4%
October 2024 40 0 95.0%

How to read this chart

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