Cheap Flights from St. Louis (CPS) to Detroit (YIP)

Popular airlines from St. Louis, MO (CPS-St. Louis Downtown) to Detroit, MI (YIP-Willow Run)

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Frequently asked questions

How much does a flight from St. Louis Downtown Airport (CPS) to Detroit, MI (YIP-Willow Run) cost?
Snag a cheap one-way flight or cheap return flight from St. Louis Downtown Airport (CPS) to Detroit, MI (YIP-Willow Run) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from St. Louis Downtown Airport (CPS) to Detroit, MI (YIP-Willow Run)?
is the least expensive month to fly from CPS to YIP. Traveling during quieter months is often the key to finding better deals on flights.
What is the cheapest airline that flies from St. Louis Downtown Airport (CPS) to Detroit, MI (YIP-Willow Run)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll fly you from CPS to YIP. Then, sort your results by "Price (lowest to highest)" to snag a good deal.
How many flights per day from St. Louis Downtown Airport (CPS) to Detroit, MI (YIP-Willow Run)?
Direct flights from St. Louis Downtown Airport (CPS) to Detroit, MI (YIP-Willow Run) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from CPS to YIP?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can vary depending on various factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from St. Louis Downtown Airport (CPS) to Detroit, MI (YIP-Willow Run)?
Opt for a flight from St. Louis Downtown Airport (CPS) to Detroit, MI (YIP-Willow Run) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures after this hour have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from St. Louis Downtown Airport (CPS) to Detroit, MI (YIP-Willow Run) last-minute?
Booking your flight from CPS to YIP shortly before your trip is generally more expensive. But if there's some wiggle room with your travel times and dates, you could grab a cheap last-minute fare.
Can I cancel or change the date of my flight from St. Louis Downtown Airport (CPS) to Detroit, MI (YIP-Willow Run)?
Typically, it's possible to cancel or reschedule your CPS to YIP flight. However, if it's been more than 24 hours since booking, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
St. Louis Downtown
Destination airport
Willow Run
Distance
429 mi

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St. Louis to Detroit Flights

The cheapest times to fly from St. Louis to Detroit

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Detroit are during the month of . You can find some of the cheapest flights from St. Louis to Detroit with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Detroit

Sunday is one of the best days to book for cheap flights from St. Louis to Detroit: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Detroit

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Detroit in 2026. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Detroit flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Detroit airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Detroit Flights

*Flight schedules are subject to change.

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