Your next trip, last seen at €133
Below averageFrontier Airlines · 2 stops · One wayWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €133, departing 7 Dec 2026 (Last checked: 27 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 71Check live prices for this route
- Airlines seen
- Southwest Airlines, Aeromexico, Alaska Airlines, Delta Air Lines, Frontier Airlines, Sun Country Airlines, United Airlines (7)
- Reported fastest flight
- 1h 15m
- Non-stop
- Yes
About this route
Explore the fares we observed from Milwaukee to St Louis. Prices move often, so pick your dates to see the latest options.
- Route distance
- 527 km
- Reported fastest flight
- 1h 15m
- Alternative airports
- SUS
Route-level information; individual journeys vary.
Published schedules report non-stop service with Southwest Airlines. Check current timetables.
A clearer picture of your fare
Airport to city: straight-line distance
- General Mitchell International Airport (MKE) → Milwaukee, city gazetteer reference point (43.0389, -87.9065): ≈ 10 km.
- St. Louis Lambert International Airport (STL) → St Louis, city gazetteer reference point (38.6270, -90.1994): ≈ 20 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by departure month
Cheapest month from Milwaukee to St Louis: December 2026, from €133 (checked 27 Oct 2026).
| Month | Lowest fare | Priced days |
|---|---|---|
| November 2026 | €134 | 19 |
| December 2026 | €133 | 30 |
| January 2027 | €201 | 21 |
Lowest fare by day of the week
Cheapest day of the week from Milwaukee to St Louis: Monday, from €133 (checked 27 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €133 | 10 |
| Tuesday | €159 | 11 |
| Wednesday | €144 | 12 |
| Thursday | €175 | 12 |
| Friday | €204 | 11 |
| Saturday | €134 | 5 |
| Sunday | €193 | 10 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Lowest fare by days before departure
Lowest fare from Milwaukee to St Louis by days until departure (31 to 60 days): €133 (checked 27 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €232 | 3 |
| 8 to 30 days | €134 | 15 |
| 31 to 60 days | €133 | 29 |
| 61 days or more | €201 | 24 |
One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.
Fares for different departure dates, checked now; not a guide to when to book.
Lowest one-way fare we saw per airline
Cheapest airline from Milwaukee to St Louis: Frontier Airlines, from €133 (checked 27 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Frontier Airlines | €133Dec 7, 2026 | 20 |
| Sun Country Airlines | €175Dec 17, 2026 | 14 |
| Alaska Airlines | €373Dec 5, 2026 | 33 |
| Aeromexico | €474Jan 12, 2027 | 3 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from Milwaukee to St Louis?
The lowest fare Routavio has observed is €133, found on 27 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Milwaukee to St Louis?
Cheapest month from Milwaukee to St Louis: December 2026, from €133 (checked 27 Oct 2026).
Are there direct flights from Milwaukee to St Louis?
Yes. Published schedules report non-stop flights on this route with Southwest Airlines.
Which airlines fly from Milwaukee to St Louis?
Routavio has seen these carriers on the route: Southwest Airlines, Aeromexico, Alaska Airlines, Delta Air Lines, Frontier Airlines, Sun Country Airlines, United Airlines (7).
How long does the flight from Milwaukee to St Louis take?
Across the 70 fares Routavio observed, the average journey time is 28h 14m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
Which day of the week is cheapest from Milwaukee to St Louis?
Cheapest day of the week from Milwaukee to St Louis: Monday, from €133 (checked 27 Oct 2026).
Which airline has the lowest fare from Milwaukee to St Louis?
Cheapest airline from Milwaukee to St Louis: Frontier Airlines, from €133 (checked 27 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
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Recently observed fares. Prices may change.
Last checked: 27 Oct 2026