Greenville/Greer/Spartanburg (GSP) to Houston (IAH)
Flight time
≈ 2h 28m
Bearing
250° W
Greenville/Greer/Spartanburg (GSP) to Houston (IAH) is 836 miles (1,346 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies GSP–IAH
Filed traffic dataIn June 2026, Mesa Airlines operated the most departures, one of 2 carriers flying nonstop GSP–IAH; the Embraer E175 was the most common aircraft at 100% of departures; flights ran 91% full.
Departures
120
June 2026
Seats
8,760
both directions
Passengers
7,937
both directions
Load factor
90.6%
RPM ÷ ASM
Who flies GSP–IAH?
Mesa Airlines operated the most nonstop GSP–IAH departures in June 2026 (118), one of 2 carriers on the route.
- YV
118 departures · 8,608 seats
Share of departures98.3%90.5%
Load
- OO
2 departures · 152 seats
Share of departures1.7%96.7%
Load
What plane flies GSP–IAH?
In June 2026, the Embraer E175 flew 100% of GSP–IAH departures.
- Embraer E175
120 departures · 90.6% load
100.0%
How has GSP–IAH traffic changed?
Nonstop GSP–IAH departures rose from 113 in July 2025 to 120 in June 2026.
Monthly nonstop GSP–IAH traffic, trailing 12 months through June 2026. Bars scale to the busiest month; months with no filed service show as zero.
July 2025
113 departures · 6,977 passengers
85.0%
Load
August 2025
108 departures · 6,718 passengers
85.2%
Load
September 2025
104 departures · 6,546 passengers
84.5%
Load
October 2025
117 departures · 7,808 passengers
89.3%
Load
November 2025
112 departures · 6,730 passengers
80.7%
Load
December 2025
111 departures · 7,052 passengers
84.8%
Load
January 2026
97 departures · 5,853 passengers
82.0%
Load
February 2026
89 departures · 5,544 passengers
86.3%
Load
March 2026
111 departures · 6,500 passengers
79.7%
Load
April 2026
120 departures · 7,100 passengers
81.0%
Load
May 2026
121 departures · 7,499 passengers
84.8%
Load
June 2026
120 departures · 7,937 passengers
90.6%
Load
By direction
Each direction is filed separately — they rarely match.
GSP → IAH
91.0% full
60 departures · 3,988 passengers
IAH → GSP
90.2% full
60 departures · 3,949 passengers
Nonstop GSP–IAH traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through June 2026; filings from 2025. Public domain (US Government work).
The airports
Greenville/Greer/Spartanburg
US
Greenville-Spartanburg International Airport
Coordinates
34.90°N, 82.22°W
Hemisphere
N · W
Frequently asked
How far is Greenville/Greer/Spartanburg (GSP) from Houston (IAH)?
GSP to IAH is 836 miles (1,346 km / 727 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from GSP to IAH?
A nonstop covers the 836-mile great-circle distance in roughly 2h 28m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies GSP–IAH?
In June 2026, the Embraer E175 flew the largest share of departures (100.0%).
What mileage do I earn flying GSP–IAH?
Distance-based programs credit off the 836-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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