Route · MDW → IAH · 2020–2025 BTS data
Chicago to Houston
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), MDW to IAH (Chicago to Houston) ranks #3542 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 76%
- On-time
- -3 pts
- vs US avg
- 59 min
- Delay when late
- 2,504
- Flights
- #3542 of 4927
- Corpus placement
Cancelled
1.9%
Best Month
Dec 2023 89%
Worst Month
Jul 2024 56%
Distance
917 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Nov 2024 | 30 | 8 | 0 | 0 | F9 |
| Aug 2024 | 30 | 10 | 0 | 0 | F9,WN |
| Jul 2024 | 64 | 28 | 3 | 0 | F9,WN |
| Jun 2024 | 64 | 26 | 0 | 0 | F9,WN |
| May 2024 | 94 | 38 | 1 | 1 | F9,WN |
| Apr 2024 | 85 | 25 | 0 | 0 | F9,WN |
| Mar 2024 | 66 | 18 | 0 | 1 | WN |
| Feb 2024 | 46 | 5 | 0 | 0 | WN |
| Jan 2024 | 56 | 12 | 5 | 1 | WN |
| Dec 2023 | 85 | 9 | 2 | 0 | WN |
| Nov 2023 | 81 | 15 | 0 | 0 | WN |
| Oct 2023 | 69 | 9 | 0 | 0 | WN |
| Sep 2023 | 52 | 11 | 0 | 0 | WN |
| Aug 2023 | 56 | 13 | 0 | 0 | WN |
| Jul 2023 | 52 | 17 | 1 | 0 | WN |
| Jun 2023 | 52 | 7 | 0 | 0 | WN |
| May 2023 | 58 | 7 | 0 | 1 | WN |
| Apr 2023 | 57 | 13 | 1 | 0 | WN |
| Mar 2023 | 62 | 24 | 0 | 1 | WN |
| Feb 2023 | 56 | 6 | 0 | 0 | WN |
| Jan 2023 | 62 | 15 | 3 | 1 | WN |
| Dec 2022 | 62 | 19 | 11 | 0 | WN |
| Nov 2022 | 52 | 15 | 0 | 0 | WN |
| Oct 2022 | 61 | 14 | 0 | 0 | WN |
MDW–IAH seasonal on-time pattern
Best: September (86.4%) · weakest: March (65.6%)
Strongest calendar month
September
86.4% on-time · ~56 flights/mo
Busiest calendar month
December
~70 flights/mo avg
Weakest calendar month
March
65.6% on-time · ~60 flights/mo
Cancellation Rate
1.9%
27 of 1,452 flights
Diversion Rate
0.4%
6 of 1,452 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
MDW - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
MDW on-time profileIAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
IAH on-time profileCompare the two airports
See MDW and IAH side by side on delays, cancellations, and reliability.
Compare MDW vs IAHOrigin-hub reliability standing
Mid-pack among MDW departures
From MDW, this corridor sits with 51 other 75–85% on-time routes out of 69 tracked departures, not the hub's reliability leaders (0 at ≥85%) and not the softest ( 18 below 75%). Destination: Houston · fleet on-time rank #4308 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to MDW–IAH.
Routes with a similar on-time rate
What the Data Says About MDW to IAH
The Chicago to Houston corridor (MDW to IAH) posts a 76% on-time rate on the lower edge of the average band, based on 2,504 tracked flights. Late flights run 58.7 minutes behind on average. 3 carriers cover the 917-mile route; over the last 24 months, 27 of 1,452 flights were cancelled (1.9%) and 0.4% diverted.
The monthly split is wide on this route: Dec 2023 posted the strongest performance at 89% on-time, while Jul 2024 came in at just 56% - a 33-point swing worth factoring into travel timing.
On the multi-year calendar, MDW–IAH peaks in September at 86.4% on-time while December carries the heaviest traffic (~70 flights per month) ; the softest month is March at 65.6%, a 20.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does MDW to IAH rank among US routes by traffic? ▼
How often are flights delayed from MDW to IAH? ▼
What is the cancellation rate for MDW to IAH? ▼
How far is the flight from MDW to IAH? ▼
When is the best time to fly from MDW 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 MDW–IAH data
MDW–IAH is mid-pack at 76% on-time; month and carrier mix move more than the corridor headline.
- Compare MDW and IAH airport profiles: delay causes and top routes differ even on the same corridor. MDW airport
- If your dates flex, September (86.4% on-time) beats March (65.6%) on this corridor. Seasonal chart
- 4 other routes post a similar 76% 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.