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Oshkosh

Cheap flights from St. Louis (STL) to Oshkosh, WI

STL — MKE
Mar 17 — Mar 241
Tue 3/17
Tue 3/24
1 adult, Economy
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Find flight deals from St. Louis to Oshkosh

Keep the following information in mind while searching for St. Louis to Oshkosh flight deals. Data was last updated February 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

September

Cheapest in

June

Average price

$521
Provider with most accurate pricing for Lambert-St Louis-Appleton Intl flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Appleton Intl flights.
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Highest demand for flights based on searches. 15% potential increase in price ($71 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in February 2026
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Cheapflights Insights

Everything you need to know about your flight from St. Louis to Oshkosh

What is the cheapest month to book a flight from St. Louis to Oshkosh?

Currently, September is the cheapest month in which you can book a flight from St. Louis to Oshkosh (average of $166). Flying from St. Louis to Oshkosh in July is currently the most expensive (average of $292). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to OS9?

Find hourly flight availability from St. Louis to Oshkosh. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 15, 2026.

A simple way to save on the total cost of your ticket is to fly from St. Louis to Oshkosh in the morning. If you’re flexible enough to do this you can expect to save up to 20% on your trip compared to booking a flight at noon.

Reviews of airlines servicing Oshkosh

Get insights into the airlines that provide service to Oshkosh. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Oshkosh. Reviews last updated February 15, 2026.
See what other customers who have flown with United Airlines and American Airlines from St. Louis to Oshkosh have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,296 reviews

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,296 reviews
United Airlines
7.4
Good
9,296 reviews

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.2
Good
11,297 reviews
United Airlines
7.4
Good
9,296 reviews

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Oshkosh. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Oshkosh?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Oshkosh. You should not have trouble finding flights to Oshkosh from Lambert-St Louis; the airport handles an average of 0 outbound flights to Oshkosh per day. You should also have plenty of airline options to choose from since 4 airlines have flights from the St. Louis airport to Oshkosh. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

  • How popular is this St. Louis to Oshkosh flight route?

    Within the past month, 1 users have taken a look at flights from Lambert-St Louis to Oshkosh.

  • Can I find deals for flights from St. Louis to Oshkosh that include hotel bookings?

    Yes. In addition to deals on St. Louis to Oshkosh flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Oshkosh?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Oshkosh.

  • Can I find deals for business class flights from St. Louis to Oshkosh?

    Yes. Cheapflights offers flight deals from St. Louis to Oshkosh by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Oshkosh?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Oshkosh (average of $166). Flying from St. Louis to Oshkosh in July is currently the most expensive (average of $292). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 4 airlines flying from St. Louis to Oshkosh

Discover the top 4 airlines that operate flights from St. Louis to Oshkosh. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$158Average$381FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$159Average$382FlexibilityNo cancel feeOn-time69%
DeltaCheapest$200Average$352FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$236Average$390FlexibilityNo cancel feeOn-time63%

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