IAH → SDFHouston to Louisville

live

Direct flights from Houston (IAH) to Louisville (SDF): 7 nonstop departures observed each week across 1 airline. The median arrival is 5 minutes early. No cancellations were recorded across the 1 tracked flight. The nonstop covers 1,268 km, an estimated 2 hours 8 minutes in the air. Measured by Pro Flight Search from live flight boards at Houston and Louisville. Updated 13 September 2026 at 17:02 UTC.

IAH Houston smooth · +0
SDF Louisville smooth · +0
1,268 km · ~2h 08m est.
dep bank 09:45–18:507x weekly
Running clean · 1 airline · 7x weekly · nonstop
100 / 100

route health from live IAH and SDF delay boards

Median arrival delay is −5 min. 0 of 1 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−5 minacross the last 1 operated legs
Flight time~2h 08mestimated from route distance
Weekly departures7x1 direct airline on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
United Airlines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
United AirlinesUA

Flights UA3990 09:45 daily · UA4040 16:33 Tu We Th Fr Sa Su · UA4050 16:37 daily · UA4052 18:50 daily

History

operated legs · board outcomes
09-13UA3990departed−5

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
IAHHouston +0 min smooth 🌤 scattered clouds · SSE 6 kt Full IAH delay board →
SDFLouisville +0 min smooth 🌤 scattered clouds · WSW 5 kt Full SDF delay board →

Weather lens

Current conditions put the pressure at SDF: 37% odds of a 15+ minute delay and around +8 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Houston to Louisville route actually runs

Pro Flight Search records official board updates for nonstop IAH to SDF flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — Houston (IAH) to Louisville (SDF) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/IAH-SDF
How we measure this →

IAH to SDF questions

Is IAH–SDF running on time right now?

Smooth skies ahead. Both endpoints currently score the same, route health score 100/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on IAH–SDF?

Operators schedule morning departures around 09:45 and evening departures around 18:50 from IAH. Earlier flights typically land before destination-airport delays accumulate later in the day; check the SDF delay card to confirm conditions when you'd arrive.

How long is the flight from IAH to SDF?

Great-circle distance is 1,268 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 120–139 min gate-to-gate on this route.

How often does IAH–SDF fly?

United Airlines runs the route with about 27 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.