FFL Helper
St Louis STL
$143
MSY → STL · Frontier Airlines
FFL Helper / New Orleans / St Louis / September 2026
MSY → STL · 2026-09
New Orleans to St Louis in September 2026
Dated one-way fares from New Orleans to St Louis in September 2026. Use the calendar to see which days are cheaper.
Lowest this month
$143
Highest this month
$143
Sample fare
$143
Airports
MSY–STL
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Other months: September 2026 · Full route
September 2026 price calendar
September 2026
From $143
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$143
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Dated fares
Booking MSY to STL in September 2026
This page is only September 2026 on the New Orleans to St Louis route. Open the full route if you want the next months side by side.
Prices move as seats sell. Confirm the live itinerary before you book New Orleans to St Louis in September 2026.