LHR → STLLondon to St Louis

live

Direct flights from London (LHR) to St Louis (STL): 4 nonstop departures observed each week across 1 airline. The median arrival is 16 minutes early. 1 of the 4 tracked flights was cancelled. The nonstop covers 6,742 km, an estimated 9 hours 9 minutes in the air. Measured by Pro Flight Search from live flight boards at London and St Louis. Updated 11 September 2026 at 04:30 UTC.

LHR London heavy · +37
STL St Louis smooth · +0
6,742 km · ~9h 09m est.
departs 16:254x weekly
Running clean · 1 airline · 4x weekly · nonstop
75 / 100

route health from live LHR and STL delay boards

Median arrival delay is −16 min. 1 of 4 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−16 minacross the last 4 operated legs
Flight time~9h 09mestimated from route distance
Weekly departures4x1 direct airline on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
British Airways

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
British AirwaysBA

Flights BA221 16:25 Tu We Fr Su

History

operated legs · board outcomes
09-09BA221dep +54 → arr+33
09-08BA221cancelledCNX
09-06BA221dep +46 → arr−16
09-04BA221dep +25 → arr−22

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
LHRLondon +37 min heavy 🌤 clear · WSW 7 kt Full LHR delay board →
STLSt Louis +0 min smooth 🌤 mostly cloudy · ENE 3 kt Full STL delay board →

Weather lens

Current conditions put the pressure at STL: 38% odds of a 15+ minute delay and around +9 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the London to St Louis route actually runs

Pro Flight Search records official board updates for nonstop LHR to STL 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 — London (LHR) to St Louis (STL) route reliability, measured from operated flights on official airport boards.

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

LHR to STL questions

Is LHR–STL running on time right now?

Mostly on schedule. The departure side at LHR is the weaker end, route health score 75/100. The airports section above carries the live status and delay window at both ends.

How long is the flight from LHR to STL?

Great-circle distance is 6,742 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 506–608 min gate-to-gate on this route.

How often does LHR–STL fly?

British Airways runs the route with about 4 flights a week (sun, tue, wed, fri). Since one carrier owns the route, a single disruption tends to ripple through the day.

What does the route health score measure?

A blend of departure-side delay at LHR and arrival-side delay at STL, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.