Kansas City to St Louis MCI → STL
Kansas City International Airport (MCI) → Lambert-St. Louis International Airport (STL)
The cheapest one-way found recently is $186 with Frontier Airlines, 29 Oct, found today.
One-way
The cheapest one-way fare on each of 3 departure dates is usually $166 to $198.
Cheapest one-way found recently
$186
29 Oct · Frontier Airlines
Kansas City International Airport (MCI) → Lambert-St. Louis International Airport (STL)
Leaves 8:43 p.m. · 22 h 31 min trip
1 stop
found today
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$186 29 Octfound todayOpen this trip
$146 27 Octfound 2 days agoOpen this trip
What have prices looked like?
Over 18 days, 25 Sept to 18 Oct, the cheapest one-way we saw each day was $67 to $380.
18 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 3 departure dates from 23 Oct to 29 Oct, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
Yes. Among one-way fares leaving within 3 days of 29 Oct, 27 Oct costs $146: $40 less than the cheapest found recently.
Frontier Airlines · Kansas City International Airport (MCI) → Lambert-St. Louis International Airport (STL) · 1 stop · found 2 days ago
Every date we hold
3 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 23 Oct | $210 | Frontier Airlines | Kansas City International Airport (MCI) → Lambert-St. Louis International Airport (STL) | 1 stop | found 6 days ago | Open this trip |
| 27 Oct | $146 | Frontier Airlines | Kansas City International Airport (MCI) → Lambert-St. Louis International Airport (STL) | 1 stop | found 2 days ago | Open this trip |
| 29 Oct | $186 | Frontier Airlines | Kansas City International Airport (MCI) → Lambert-St. Louis International Airport (STL) | 1 stop | found today | Open this trip |
Airlines on the cheapest dates: Frontier Airlines.
Premium cabin fares from Kansas City to St Louis
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 29 Oct in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Kansas City to St Louis?
One-way
Not enough history yet: in 18 days of one-way prices, 25 Sept to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
One-way
Kansas City → Belleville
30 km from St Louis
$227
$41 more than flying to St Louis
26 Oct · MCI → BLV · 1 stop
found 3 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest one-way found recently is for 29 Oct. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work