Cancún (CUN) to St Louis (STL)
Flight time
≈ 3h 17m
Bearing
351° N
Cancún (CUN) to St Louis (STL) is 1,241 miles (1,997 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies CUN–STL
Filed traffic dataIn May 2026, Southwest Airlines operated the most departures, one of 2 carriers flying nonstop CUN–STL; the Airbus A321neo was the most common aircraft at 37% of departures; flights ran 77% full.
Departures
134
May 2026
Seats
26,866
both directions
Passengers
20,679
both directions
Load factor
77.0%
RPM ÷ ASM
Who flies CUN–STL?
Southwest Airlines operated the most nonstop CUN–STL departures in May 2026 (72), one of 2 carriers on the route.
- WN
72 departures · 12,106 seats
Share of departures53.7%78.1%
Load
- F9
62 departures · 14,760 seats
Share of departures46.3%76.0%
Load
What plane flies CUN–STL?
In May 2026, the Airbus A321neo flew 37% of CUN–STL departures — more than any other aircraft type.
- Airbus A321neo
50 departures · 76.3% load
37.3% - Boeing 737 MAX 8
49 departures · 78.8% load
36.6% - Boeing 737-700
13 departures · 79.6% load
9.7% - Airbus A321
12 departures · 74.9% load
9.0% - Boeing 737-800
10 departures · 73.3% load
7.5%
How has CUN–STL traffic changed?
Nonstop CUN–STL departures fell from 171 in June 2025 to 134 in May 2026.
Monthly nonstop CUN–STL traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
171 departures · 25,795 passengers
88.7%
Load
July 2025
188 departures · 27,115 passengers
85.6%
Load
August 2025
115 departures · 16,581 passengers
77.1%
Load
September 2025
101 departures · 14,225 passengers
68.3%
Load
October 2025
138 departures · 19,842 passengers
75.6%
Load
November 2025
136 departures · 17,870 passengers
67.3%
Load
December 2025
154 departures · 20,486 passengers
70.4%
Load
January 2026
150 departures · 22,616 passengers
80.0%
Load
February 2026
142 departures · 21,455 passengers
81.7%
Load
March 2026
151 departures · 20,947 passengers
72.9%
Load
April 2026
132 departures · 18,157 passengers
69.8%
Load
May 2026
134 departures · 20,679 passengers
77.0%
Load
By direction
Each direction is filed separately — they rarely match.
CUN → STL
77.2% full
67 departures · 10,308 passengers
STL → CUN
76.7% full
67 departures · 10,371 passengers
Nonstop CUN–STL traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
The airports
Cancún
MX
Cancún International Airport
Coordinates
21.04°N, 86.87°W
Hemisphere
N · W
Frequently asked
How far is Cancún (CUN) from St Louis (STL)?
CUN to STL is 1,241 miles (1,997 km / 1,078 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from CUN to STL?
A nonstop covers the 1,241-mile great-circle distance in roughly 3h 17m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies CUN–STL?
In May 2026, the Airbus A321neo flew the largest share of departures (37.3%), followed by the Boeing 737 MAX 8 (36.6%).
What mileage do I earn flying CUN–STL?
Distance-based programs credit off the 1,241-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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