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Route · IAH → BRO · 2020–2025 BTS data

Houston to Brownsville

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), IAH to BRO (Houston to Brownsville) ranks #4232 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

88.2%
On-time
+9.2 pts
vs US avg
97 min
Delay when late
1,384
Flights
#4232 of 4927
Corpus placement

Cancelled

4.2%

Best Month

Aug 2020 99%

Worst Month

Aug 2021 69%

Distance

308 mi

Carriers

9

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Oct 2024 53 9 0 0 OO
Aug 2024 47 8 0 0 OO
Jul 2024 60 14 8 0 OO
Jun 2024 58 17 1 0 OO
May 2024 37 14 2 0 OO
Mar 2024 38 4 1 0 OO
Aug 2021 62 19 1 0 YV
Jul 2021 33 9 1 0 YV
May 2021 45 7 0 0 OO,YV
Feb 2021 33 4 9 1 OO
Dec 2020 42 5 0 0 OO
Nov 2020 82 4 0 0 YV,OO
Oct 2020 84 6 0 0 OO
Sep 2020 83 4 0 0 EV,OO
Aug 2020 92 1 6 0 EV
Jul 2020 76 5 3 0 EV
Jun 2020 52 5 0 0 EV
May 2020 47 3 1 0 EV
Apr 2020 37 1 6 0 EV
Mar 2020 123 5 19 0 EV,YV,YX
Feb 2020 105 10 0 0 YV,EV,YX
Jan 2020 95 9 0 0 YV,YX,EV

IAH–BRO seasonal on-time pattern

Best: April (97.3%) · weakest: June (80.0%)

75%80%85%90%95%100% JanFebMarAprMayJunJulAugSepOctNovDec 88.1%

Strongest calendar month

April

97.3% on-time · ~37 flights/mo

Busiest calendar month

January

~95 flights/mo avg

Weakest calendar month

June

80.0% on-time · ~55 flights/mo

Cancellation Rate

4.2%

58 of 1,384 flights

Diversion Rate

0.1%

1 of 1,384 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

IAH - Houston

Full on-time, delay-cause, and seasonal performance for Houston, TX.

IAH on-time profile

BRO - Brownsville

Full on-time, delay-cause, and seasonal performance for Brownsville, TX.

BRO on-time profile

Compare the two airports

See IAH and BRO side by side on delays, cancellations, and reliability.

Compare IAH vs BRO

Origin-hub reliability standing

Among IAH's stronger departures

IAH → BRO posts a 88.2% on-time rate, landing in the ≥85% band with 17 of 102 BTS-tracked routes leaving Houston. The same hub also shows 79 mid-band and 6 challenged departures · fleet-wide on-time rank #385 of 4927 (highest on-time = #1).

What the Data Says About IAH to BRO

Houston to Brownsville (IAH to BRO) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 88.2% on-time rate across 1,384 flights, with delays that do happen averaging 97.4 minutes. The corridor runs roughly 308 miles and is served by 9 carriers. Over the most recent 24 months, 58 of 1,384 flights were cancelled (4.2%) and 1 diverted (0.1%).

The monthly split is wide on this route: Aug 2020 posted the strongest performance at 99% on-time, while Aug 2021 came in at just 69% - a 30-point swing worth factoring into travel timing.

On the multi-year calendar, IAH–BRO peaks in April at 97.3% on-time while January carries the heaviest traffic (~95 flights per month) ; the softest month is June at 80.0%, a 17.3-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does IAH to BRO rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, IAH to BRO ranks #4232 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from IAH to BRO? ▼
Flights from Houston to Brownsville have a 88.2% on-time rate based on 1,384 flights. The average delay is 97.4 minutes. The best recent month was Aug 2020 with 99% on-time.
What is the cancellation rate for IAH to BRO? ▼
Over the last 24 months, 4.2% of flights on this route were cancelled (58 of 1,384 flights) and 0.1% were diverted.
How far is the flight from IAH to BRO? ▼
The flight distance from Houston (IAH) to Brownsville (BRO) is approximately 308 miles. This route is served by 9 carriers.
When is the best time to fly from IAH to BRO? ▼
The best recent month for on-time performance was Aug 2020 (99% on-time). The worst was Aug 2021 (69% on-time). Consider booking during months with historically better performance.

Airports on this route

IAH Airport

Houston
BRO Airport

Brownsville
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 IAH–BRO data

IAH–BRO runs 9.2 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare IAH and BRO airport profiles: delay causes and top routes differ even on the same corridor. IAH airport
  • If your dates flex, April (97.3% on-time) beats June (80.0%) on this corridor. Seasonal chart
  • 4 other routes post a similar 88.2% 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.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

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.