Route · DAL → IAH · 2020–2025 BTS data
Dallas to Houston
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), DAL to IAH (Dallas to Houston) ranks #2342 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 79.4%
- On-time
- +0.4 pts
- vs US avg
- 61 min
- Delay when late
- 5,383
- Flights
- #2342 of 4927
- Corpus placement
Cancelled
2.1%
Best Month
Aug 2023 92%
Worst Month
Jun 2024 66%
Distance
216 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Jul 2024 | 83 | 25 | 3 | 0 | WN |
| Jun 2024 | 80 | 27 | 0 | 0 | WN |
| May 2024 | 75 | 21 | 1 | 0 | WN |
| Apr 2024 | 77 | 17 | 1 | 0 | WN |
| Mar 2024 | 88 | 25 | 0 | 0 | WN |
| Feb 2024 | 83 | 11 | 0 | 0 | WN |
| Jan 2024 | 99 | 18 | 5 | 0 | WN |
| Dec 2023 | 128 | 20 | 1 | 0 | WN |
| Nov 2023 | 129 | 17 | 2 | 1 | WN |
| Oct 2023 | 137 | 31 | 1 | 0 | WN |
| Sep 2023 | 133 | 15 | 0 | 0 | WN |
| Aug 2023 | 143 | 12 | 1 | 0 | WN |
| Jul 2023 | 134 | 21 | 1 | 0 | WN |
| Jun 2023 | 131 | 26 | 2 | 1 | WN |
| May 2023 | 139 | 24 | 2 | 0 | WN |
| Apr 2023 | 132 | 31 | 3 | 1 | WN |
| Mar 2023 | 143 | 42 | 2 | 0 | WN |
| Feb 2023 | 128 | 23 | 5 | 0 | WN |
| Jan 2023 | 142 | 21 | 9 | 0 | WN |
| Dec 2022 | 132 | 29 | 11 | 0 | WN |
| Nov 2022 | 130 | 15 | 1 | 0 | WN |
| Oct 2022 | 131 | 21 | 2 | 0 | WN |
| Sep 2022 | 132 | 19 | 1 | 0 | WN |
| Aug 2022 | 147 | 33 | 5 | 0 | WN |
DAL–IAH seasonal on-time pattern
Best: February (86.6%) · weakest: March (71.9%)
Strongest calendar month
February
86.6% on-time · ~122 flights/mo
Busiest calendar month
August
~156 flights/mo avg
Weakest calendar month
March
71.9% on-time · ~135 flights/mo
Cancellation Rate
2.1%
59 of 2,876 flights
Diversion Rate
0.1%
3 of 2,876 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
DAL - Dallas
Full on-time, delay-cause, and seasonal performance for Dallas, TX.
DAL on-time profileIAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
IAH on-time profileCompare the two airports
See DAL and IAH side by side on delays, cancellations, and reliability.
Compare DAL vs IAHOrigin-hub reliability standing
Mid-pack among DAL departures
From DAL, this corridor sits with 47 other 75–85% on-time routes out of 57 tracked departures, not the hub's reliability leaders (0 at ≥85%) and not the softest ( 10 below 75%). Destination: Houston · fleet on-time rank #3364 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to DAL–IAH.
Routes with a similar on-time rate
What the Data Says About DAL to IAH
5,383 tracked flights put the DAL to IAH pairing (Dallas to Houston) at a 79.4% on-time rate, squarely in line with the wider network. Delays that do occur run 60.7 minutes on average. Across the 216-mile route and its 1 carrier, the trailing 24 months show 2.1% cancelled and 0.1% diverted (2,876 flights sampled).
The monthly split is wide on this route: Aug 2023 posted the strongest performance at 92% on-time, while Jun 2024 came in at just 66% - a 25-point swing worth factoring into travel timing.
On the multi-year calendar, DAL–IAH peaks in February at 86.6% on-time while August carries the heaviest traffic (~156 flights per month) ; the softest month is March at 71.9%, a 14.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does DAL to IAH rank among US routes by traffic? ▼
How often are flights delayed from DAL to IAH? ▼
What is the cancellation rate for DAL to IAH? ▼
How far is the flight from DAL to IAH? ▼
When is the best time to fly from DAL to IAH? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using DAL–IAH data
DAL–IAH is mid-pack at 79.4% on-time; month and carrier mix move more than the corridor headline.
- Compare DAL and IAH airport profiles: delay causes and top routes differ even on the same corridor. DAL airport
- If your dates flex, February (86.6% on-time) beats March (71.9%) on this corridor. Seasonal chart
- 4 other routes post a similar 79.4% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.