STL → CUNSt Louis to Cancún

live

Direct flights from St Louis (STL) to Cancún (CUN): 12 nonstop departures observed each week across 2 airlines. 80% of the last 5 operated flights arrived within 15 minutes of schedule. The median arrival is 8 minutes early. 1 of the 5 tracked flights was cancelled. The nonstop covers 1,998 km, an estimated 3 hours 4 minutes in the air. Measured by Pro Flight Search from live flight boards at St Louis and Cancún. Updated 21 August 2026 at 15:18 UTC.

STL St Louis smooth · +12
CUN Cancún smooth · +0
1,998 km · ~3h 04m est.
dep bank 06:34–10:2512x weekly
Runs reliable · 2 airlines · 12x weekly · nonstop
80% on time

of the last 5 operated STL → CUN flights arrived within 15 minutes

Median arrival delay is −8 min. 1 of 5 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Search live fares for this route →
Median arrival−8 minacross the last 5 operated legs
Flight time~3h 04mestimated from route distance
Weekly departures12x2 direct airlines on the leg

Current nonstop fares

STL → CUN · one way · economy · 1 adult

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TodayChecking…Direct airline fares
TomorrowChecking…Direct airline fares
In one weekChecking…Direct airline fares

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Frontier AirlinesSouthwest 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
Frontier AirlinesF9

Flights F986 06:34 daily

Southwest AirlinesWN

Flights WN1995 10:25 Mo Th Fr Sa Su

History

operated legs · board outcomes
08-20WN1995dep +11 → arr−8
08-17F986dep −11 → arr−40
08-17WN1995dep +8 → arr−8
08-16F986cancelledCNX
08-16WN1995arrived−4

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
STLSt Louis +12 min smooth 🌤 few clouds · 3 kt Full STL delay board →
CUNCancún +0 min smooth ⛅ mostly cloudy · E 4 kt Full CUN delay board →

Weather lens

Current conditions put the pressure at STL: 39% odds of a 15+ minute delay and around +11 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the St Louis to Cancún route actually runs

Pro Flight Search tracks every published board update for nonstop STL to CUN flights: 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. Fares link straight to the operating airline with no markups.

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 — St Louis (STL) to Cancún (CUN) route reliability, measured from operated flights on official airport boards.

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

STL to CUN questions

Is STL–CUN running on time right now?

Smooth skies ahead. The departure side at STL is the weaker end, route health score 92/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on STL–CUN?

Operators schedule morning departures around 06:34 from STL. Earlier flights typically land before destination-airport delays accumulate later in the day; check the CUN delay card to confirm conditions when you'd arrive.

How long is the flight from STL to CUN?

Great-circle distance is 1,998 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 171–201 min gate-to-gate on this route.

How often does STL–CUN fly?

2 carriers operate this route, around 12 flights a week between them. Compare carrier days and times in the airline list above.