Carrier route record
MQDFW→IAH
Envoy Air · Dallas-Fort Worth to Houston
- 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 DFW to IAH 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 about 55 minutes 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 2,414 at 76.9% on time.
The US average over the same twelve months is 77.6%, so there is little to separate Envoy on DFW to IAH from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
78.0%
Arrivals under 15 minutes late, of 812 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
2.98%
National rate is 1.81%
Whole route
69.8%
Every carrier on DFW to IAH, 5,780 flights
These figures cover 840 flights between July 2025 and June 2026. The median arrival is 4 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Carrier by carrier
Envoy against every carrier on DFW to IAH
Envoy flew 840 of the 5,780 flights on DFW to IAH, about 15% of it. Its 78.0% on time is 8 points better than the route as a whole, which runs 69.8%. Ranked by on-time rate it is first of five carriers on the route, where the range runs from Envoy at 78.0% to American at 59.7%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. United Airlines arrives on time 76.9% of the time; American Airlines manages 59.7%. Sample sizes sit next to every figure, because a two-point gap across 2,465 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Air (this page) | 840 | 78.0% | 55 min | 2.98% | B |
| SkyWest Airlinesthin sample | 53 | 77.6% | 98 min | 7.55% | B− |
| United Airlines | 2,414 | 76.9% | 86 min | 1.99% | B |
| PSA Airlinesthin sample | 8 | 75.0% | 113 min | 0.00% | B+ |
| American Airlines | 2,465 | 59.7% | 83 min | 3.73% | D− |
American Airlines cancels 3.7% 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 13 points, against 17 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am238 flights78.6%
- 8am–11am179 flights81.0%
- 11am–2pm157 flights78.9%
- 2pm–5pm229 flights72.7%
- 5pm–8pm37 flights86.1%
- 8pm–5am—
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is the strongest at 86.1% on time. The full set of windows spans 13 points.
Across the year
Envoy on DFW to IAH through the year
Delays peak in May, when the on-time rate falls to 60.9%. February is the strongest month at 95.9%. Moving a flexible trip across that boundary buys 35 points. July was the busiest month here, with 124 flights.
Across the week, Tuesday is the strongest day at 89.7% on time and Sunday the weakest at 69.2%. 21 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Envoy runs late on this route
One category carries most of the weight here. National Airspace System accounts for 47% of the 9,833 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 47%National Airspace System
- 31%Late-arriving aircraft
- 14%Carrier
- 8%Extreme weather
- 0%Security
47% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 4,649 minutes out of 9,833, against a national NAS share of 21%. The split is drawn from 9,833 reported delay minutes.
Cancellations run at 2.98%, against 1.81% nationally. That is roughly 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
6.0% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 55 minutes, which a normal layover absorbs.
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 5pm–8pm window matters as much as it does.
The return leg runs 78.1% 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 DFW to IAH
Put together: the delay figures matter less here than the 2.98% cancellation rate. A late arrival costs you about 55 minutes; a cancelled flight costs you the day. Book the 5pm–8pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 812 completed flights over 12 months sit behind that.
Related
Where to go next
- DFW to IAH, every carrier
- Envoy on IAH to DFW, the return leg
- United Airlines on DFW to IAH76.9%
- American Airlines on DFW to IAH59.7%
- Envoy Air network-wide record
- Dallas/Fort Worth International (DFW) delay statistics
- George Bush Intercontinental (IAH) delay statistics
- The US routes with the most cancellations
- Same route, different airline: where the carrier you pick matters most
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.