Route reliability
Houston (IAH) to Dallas/Fort Worth (DFW): which airline is most on time?
On-time arrivals, cancellations and long delays for every airline that reported nonstop flights from Houston, TX (IAH) to Dallas/Fort Worth, TX (DFW), September 2025 to August 2026.
Houston, TXDallas/Fort Worth, TX
Route at a glance · September 2025 to August 2026
IAH to DFW
Houston, TX to Dallas/Fort Worth, TX
- On time
- 74.5%vs 75.6% U.S. average About average
- Cancelled
- 2.3%vs 1.9% U.S. average Worse than average
- 60+ min late
- 10.6%vs 8.1% U.S. average Worse than average
- Scheduled flights
- 5,800in 12 months5 airlines
- Most reliable airline
- Envoy Air76.9% on time · 710 flights
On time about as often as the U.S. average, with more cancellations.
Airlines on this route
Ranked by on-time arrival
| Airline | On time | Cancelled | 60+ min late | Avg delay when late | Diverted | Flights |
|---|---|---|---|---|---|---|
| 1. Envoy Air Operating carrier; sold as American Eagle Most reliable | 76.9% | 2.7% | 9.3% | 106 min | 0.0% | 710 |
| 2. United Airlines | 75.6% | 1.4% | 9.3% | 72 min | 0.2% | 2,459 |
| 3. American Airlines | 72.7% | 3.0% | 12.3% | 120 min | 0.2% | 2,513 |
| 4. SkyWest Airlines Operating carrier; sold as United Express, Delta Connection, American Eagle, Alaska Small sample (under 300 flights) | 72.3% | 6.0% | 7.2% | 66 min | 0.0% | 83 |
| PSA Airlines Operating carrier; sold as American Eagle | Insufficient sample (fewer than 50 flights) | 35 | ||||
On time = arrived within 15 minutes of schedule. Avg delay when late = average arrival delay of flights 15+ minutes late. "Most reliable" needs at least 300 flights in 12 months. Tap a heading to sort.
What this means
Envoy Air has the strongest record on this route.
- Envoy Air had the best on-time record from Houston (IAH) to Dallas/Fort Worth (DFW): 76.9% of its 710 scheduled flights arrived within 15 minutes of schedule, compared with 72.7% for American Airlines.
- PSA Airlines also flew this route but with fewer than 50 reported flights, too few to rate.
- 2.3% of flights on this route were cancelled (about 1 in 43), about the same as the U.S. average of 1.9%.
- 10.6% of flights, about 1 in 9, arrived an hour or more late. When a flight was late (15+ minutes), the average arrival delay was 98 min.
- Overall, 74.5% of flights on this route arrived on time, 1.1 points lower than the U.S. average of 75.6%.
- Over the last 3 years, February was the most reliable month on this route (82.1% on time) and June the least reliable (60.1%).
- Cancellations peaked in January, when 7.7% of flights were cancelled.
- Flights scheduled to depart before 6 am were the most punctual (86.6% on time); flights scheduled to depart 7 pm to 8 pm were the least (57.9%).
- In the other direction, Dallas/Fort Worth (DFW) to Houston (IAH), 68.9% of flights were on time and 2.4% were cancelled. Compare airlines DFW to IAH.
Best and worst months to fly IAH to DFW
Share of scheduled flights on time 12-month average 74.5%
Show as table
| Period | On time | Flights |
|---|---|---|
| January | 71.2% | 1,352 |
| February | 82.1% | 1,237 |
| March | 73.9% | 1,420 |
| April | 71.1% | 1,426 |
| May | 60.1% | 1,480 |
| June | 60.1% | 1,362 |
| July | 63.8% | 1,364 |
| August | 70.4% | 1,380 |
| September | 76.8% | 1,403 |
| October | 75.6% | 1,454 |
| November | 75.1% | 1,317 |
| December | 75.1% | 1,313 |
| Airline | Best month | Worst month |
|---|---|---|
| Envoy Air | February (88.1%) | May (64.2%) |
| United Airlines | February (82.7%) | June (56.0%) |
| American Airlines | September (80.5%) | May (60.3%) |
Month by month, last 12 months
Share of scheduled flights on time U.S. average 75.6%
Show as table
| Period | On time | Flights |
|---|---|---|
| Sep 2025 | 79.3% | 498 |
| Oct 2025 | 79.3% | 503 |
| Nov 2025 | 68.8% | 475 |
| Dec 2025 | 74.9% | 499 |
| Jan 2026 | 76.2% | 475 |
| Feb 2026 | 85.0% | 413 |
| Mar 2026 | 77.3% | 488 |
| Apr 2026 | 74.0% | 524 |
| May 2026 | 68.9% | 518 |
| Jun 2026 | 62.1% | 464 |
| Jul 2026 | 72.0% | 482 |
| Aug 2026 | 77.2% | 461 |
Best and worst departure times
Share of scheduled flights on time
Show as table
| Period | On time | Flights |
|---|---|---|
| Departing before 6 am | 86.6% | 337 |
| Departing 6 am to 7 am | 86.3% | 365 |
| Departing 7 am to 8 am | 83.0% | 619 |
| Departing 8 am to 9 am | 77.0% | 187 |
| Departing 9 am to 10 am | 81.5% | 443 |
| Departing 10 am to 11 am | 75.1% | 357 |
| Departing 11 am to noon | 76.0% | 254 |
| Departing noon to 1 pm | 79.2% | 379 |
| Departing 1 pm to 2 pm | 65.6% | 64 |
| Departing 2 pm to 3 pm | 70.3% | 644 |
| Departing 3 pm to 4 pm | Insufficient sample | 6 |
| Departing 4 pm to 5 pm | 69.1% | 667 |
| Departing 5 pm to 6 pm | Insufficient sample | 16 |
| Departing 6 pm to 7 pm | 61.1% | 687 |
| Departing 7 pm to 8 pm | 57.9% | 228 |
| Departing 8 pm to 9 pm | 72.3% | 285 |
| Departing 9 pm to 10 pm | 79.2% | 207 |
| Departing 10 pm to 11 pm | 84.9% | 53 |
| Departing 11 pm to midnight | Insufficient sample | 2 |
Sources & data dates
- Source
- U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
- Period
- September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
- Data through
- August 2026
- Processed
- 2026-11-03
- Scope
- Nonstop scheduled flights from Houston, TX (IAH) to Dallas/Fort Worth, TX (DFW), one direction. Airlines that report to the DOT only.
- Method
- Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.