Carrier route record
MQIAH→DFW
Envoy Air · Houston to Dallas-Fort Worth
- Flights
- 840
- Period
- July 2025 to June 2026
- Share of route
- 15%
- Carriers
- 5
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Envoy Air.
Envoy on IAH to DFW lands a B−, level with the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 840 flights. The strongest carrier on the route with a full sample, United Airlines, flew 2,415 at 75.7% on time.
The US average over the same twelve months is 77.6%, so there is little to separate Envoy on IAH to DFW from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
78.1%
Arrivals under 15 minutes late, of 813 completed flights
Avg delay
100 min
Across delayed arrivals only, not all flights
Cancelled
3.10%
National rate is 1.81%
Whole route
75.0%
Every carrier on IAH to DFW, 5,779 flights
These figures cover 840 flights between July 2025 and June 2026. Beyond the headline rate, 9.7% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Envoy against every carrier on IAH to DFW
Envoy flew 840 of the 5,779 flights on IAH to DFW, about 15% of it. Its 78.1% on time is 3 points better than the route as a whole, which runs 75.0%. Ranked by on-time rate it is number two of five carriers on the route, where the range runs from SkyWest at 79.2% to PSA at 57.1%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The two carriers here are closely matched: 3 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlinesthin sample | 53 | 79.2% | 58 min | 9.43% | B− |
| Envoy Air (this page) | 840 | 78.1% | 100 min | 3.10% | B− |
| United Airlines | 2,415 | 75.7% | 74 min | 1.70% | B |
| American Airlines | 2,464 | 73.2% | 121 min | 3.65% | C− |
| PSA Airlinesthin sample | 7 | 57.1% | 428 min | 0.00% | D+ |
American Airlines cancels 3.6% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Departure window
When Envoy runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 10 points, against 3 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am14 flights—
- 8am–11am260 flights83.1%
- 11am–2pm220 flights75.6%
- 2pm–5pm294 flights75.7%
- 5pm–8pm52 flights73.1%
- 8pm–5am—
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 83.1% of the time, against 73.1% for the evening window. That is 10 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 294 flights scheduled in it.
Across the year
Envoy on IAH to DFW through the year
June is the worst month at 66.1% on time, 24 points below February, the best at 89.6%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. July was the busiest month here, with 124 flights.
Across the week, Tuesday is the strongest day at 84.3% on time and Sunday the weakest at 71.0%. 13 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Envoy runs late on this route
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 18,000 reported delay minutes.
- 40%Late-arriving aircraft
- 33%Extreme weather
- 19%National Airspace System
- 9%Carrier
Extreme weather accounts for 33% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 5.2 times the usual weather exposure. The split is drawn from 17,859 reported delay minutes.
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 18,000 reported delay minutes here, that single category outweighs weather by 1 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit.
Cancellations run at 3.10%, against 1.81% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.7% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
At 224 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 8am–11am window matters as much as it does.
The return leg runs 78.0% on time across 840 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 840 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking Envoy on IAH to DFW
Put together: the delay figures matter less here than the 3.10% cancellation rate. A late arrival costs you close to two hours; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 813 completed flights over 12 months sit behind that.
Related
Where to go next
- IAH to DFW, every carrier
- Envoy on DFW to IAH, the return leg
- United Airlines on IAH to DFW75.7%
- American Airlines on IAH to DFW73.2%
- Envoy Air network-wide record
- George Bush Intercontinental (IAH) delay statistics
- Dallas/Fort Worth International (DFW) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.