PlainFlights

Route · IAH → SGF · 2020–2025 BTS data

Houston to Springfield

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), IAH to SGF (Houston to Springfield) ranks #4555 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

76.1%
On-time
-2.9 pts
vs US avg
111 min
Delay when late
943
Flights
#4555 of 4927
Corpus placement

Cancelled

2.8%

Best Month

Mar 2020 92%

Worst Month

Jun 2025 67%

Distance

513 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Aug 2025 34 8 0 0 OO
Jul 2025 62 18 0 0 OO
Jun 2025 63 21 4 1 OO
May 2025 99 25 2 0 OO
Apr 2025 76 17 0 1 OO
Mar 2025 60 19 0 0 OO
Feb 2025 50 12 2 1 OO
Jan 2025 56 15 4 0 OO
Dec 2024 46 20 0 0 OO
Nov 2024 53 12 0 1 OO
Oct 2024 62 16 0 0 OO
Sep 2024 59 9 0 0 OO
Aug 2024 46 12 0 0 OO
Mar 2020 66 5 14 0 EV,OO
Feb 2020 53 7 0 0 EV,OO
Jan 2020 58 9 0 0 OO,EV

IAH–SGF seasonal on-time pattern

Best: September (84.7%) · weakest: December (56.5%)

50%60%70%80%90% JanFebMarAprMayJunJulAugSepOctNovDec 56.5%

Strongest calendar month

September

84.7% on-time · ~59 flights/mo

Busiest calendar month

May

~99 flights/mo avg

Weakest calendar month

December

56.5% on-time · ~46 flights/mo

Cancellation Rate

2.8%

26 of 943 flights

Diversion Rate

0.4%

4 of 943 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

SGF - Springfield

Full on-time, delay-cause, and seasonal performance for Springfield, MO.

SGF on-time profile

Compare the two airports

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

Compare IAH vs SGF

Origin-hub reliability standing

Mid-pack among IAH departures

From IAH, this corridor sits with 79 other 75–85% on-time routes out of 102 tracked departures, not the hub's reliability leaders (17 at ≥85%) and not the softest ( 6 below 75%). Destination: Springfield · fleet on-time rank #4284 of 4927.

What the Data Says About IAH to SGF

The Houston to Springfield corridor (IAH to SGF) posts a 76.1% on-time rate on the lower edge of the average band, based on 943 tracked flights. Late flights run 110.7 minutes behind on average. 3 carriers cover the 513-mile route; over the last 24 months, 26 of 943 flights were cancelled (2.8%) and 0.4% diverted.

The monthly split is wide on this route: Mar 2020 posted the strongest performance at 92% on-time, while Jun 2025 came in at just 67% - a 26-point swing worth factoring into travel timing.

On the multi-year calendar, IAH–SGF peaks in September at 84.7% on-time while May carries the heaviest traffic (~99 flights per month) ; the softest month is December at 56.5%, a 28.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does IAH to SGF rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, IAH to SGF ranks #4555 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 SGF? ▼
Flights from Houston to Springfield have a 76.1% on-time rate based on 943 flights. The average delay is 110.7 minutes. The best recent month was Mar 2020 with 92% on-time.
What is the cancellation rate for IAH to SGF? ▼
Over the last 24 months, 2.8% of flights on this route were cancelled (26 of 943 flights) and 0.4% were diverted.
How far is the flight from IAH to SGF? ▼
The flight distance from Houston (IAH) to Springfield (SGF) is approximately 513 miles. This route is served by 3 carriers.
When is the best time to fly from IAH to SGF? ▼
The best recent month for on-time performance was Mar 2020 (92% on-time). The worst was Jun 2025 (67% on-time). Consider booking during months with historically better performance.

Airports on this route

IAH Airport

Houston
SGF Airport

Springfield
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–SGF data

IAH–SGF is mid-pack at 76.1% on-time; month and carrier mix move more than the corridor headline.

  • Compare IAH and SGF airport profiles: delay causes and top routes differ even on the same corridor. IAH airport
  • If your dates flex, September (84.7% on-time) beats December (56.5%) on this corridor. Seasonal chart
  • 4 other routes post a similar 76.1% 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.