Question 1

What are the cheapest airlines flying from Detroit to St. Louis round-trip?

Accepted Answer

Currently priced at C$ 125, Delta will fly you from Detroit to St. Louis and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Southwest for as low as C$ 186. You may be able to fly from Detroit to St. Louis for 68% less than the average price by searching for these airlines.

Question 2

How far ahead should I book a flight from Detroit to St. Louis?

Accepted Answer

To ensure you get the cheapest price possible for a flight from Detroit to St. Louis, you should look to book at least 33 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Question 3

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

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Detroit to St. Louis (average of C$ 365). Flying from Detroit to St. Louis in September is currently the most expensive (average of C$ 491). 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.

Question 4

What is the cheapest day to fly from Detroit to St. Louis?

Accepted Answer

Travelers seeking maximum savings on their Detroit to St. Louis flight should consider departing on Thursday afternoons when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Question 5

Weekly flight availability from Detroit to St. Louis

Accepted Answer

The most flights from DTT to STL are scheduled on a Sunday (19 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (13 on average).

Question 6

E

Accepted Answer

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 mm per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

Question 7

E

Accepted Answer

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

Question 8

What are the most reliable airlines from Detroit to St. Louis?

Accepted Answer

No one likes to see their flight delayed. When booking a flight from Detroit to St. Louis consider choosing Endeavor Airlines (100%), Spirit Airlines (91%) or Aeromexico (83%) as they are the most reliable in getting you off to your destination on time.

Question 9

What is the cheapest day to fly round-trip from Detroit to St. Louis?

Accepted Answer

Monday flights are found to be more expensive to fly from Detroit to St. Louis. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to St. Louis.

Question 10

How far in advance should I book a flight from Detroit to St. Louis?

Accepted Answer

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 34 days in advance, which can save you up to 358% on flights from Detroit to St. Louis compared to booking the week you need them. Waiting 34 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at C$ 218. For sooner than that we have options available in the next 3 days from C$ 804.

Question 11

What is the cheapest month to fly from Detroit to St. Louis?

Accepted Answer

July can be a great time to fly to St. Louis from Detroit with a flight ticket averaging about C$ 392. Cheapflights users have found deals in the month of July for as cheap as C$ 82. The most expensive prices can be found in the month of December.

Question 12

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

Accepted Answer

One of the essential ways to save on airfare from Detroit to St. Louis is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 16% on airfare.

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

How does Cheapflights help users find flights from Detroit to St. Louis?

Accepted Answer

Cheapflights makes it easy to find Detroit to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Question 17

Why should you use Cheapflights to find cheap flight tickets from Detroit to St. Louis?

Accepted Answer

Cheapflights simply makes it quick and affordable to book flights from Detroit to St. Louis by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Question 18

Can Cheapflights find flights from Detroit to St. Louis with no change fees?

Accepted Answer

Need flexible booking options for your flight to St. Louis from Detroit? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Question 19

Can Cheapflights notify me if prices for flights from Detroit to St. Louis become cheaper?

Accepted Answer

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

Popular in	December
Cheapest in	July
Average price	C$ 204
Good round-trip deal	C$ 140 or less

Airline	Cheapest	Average	Flexibility	On-time
Delta	CheapestC$ 125	AverageC$ 413	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Southwest	CheapestC$ 186	AverageC$ 412	FlexibilityNo cancel fee	On-time63%	Search Southwest flights

Cheap flights from Detroit to St. Louis

Cheapflights Tip: The best prices from Detroit All airports to Lambert-St Louis are usually found in July or August, booked 33 days in advance, depart on a Thursday or Friday and return on a Monday

Cheap flight deals from Detroit to St. Louis

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Best time to book a flight from Detroit to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Detroit with our price prediction graph.

Cheapflights Insights

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

How far ahead should I book a flight from Detroit to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Detroit to St. Louis. Price data was last updated on 8 August 2025.

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

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

Find hourly flight availability from Detroit to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 August 2025.

Weekly flight availability from Detroit to St. Louis

Explore weekly flight availability from Detroit to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 18 August 2025.

Reviews of airlines servicing St. Louis

Read reviews from past customers who have flown Southwest and Delta from Detroit to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What are the cheapest airlines flying from Detroit to St. Louis round-trip?

What are the most reliable airlines from Detroit to St. Louis?

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

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

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

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

Travelling to a place near St. Louis?

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Complete your trip

Complete your trip to St. Louis by adding a car rental and/or hotel reservation to your travel itinerary.

Top 2 airlines flying from Detroit to St. Louis

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How does Cheapflights help users find flights from Detroit to St. Louis?

Why should you use Cheapflights to find cheap flight tickets from Detroit to St. Louis?

Can Cheapflights find flights from Detroit to St. Louis with no change fees?

Can Cheapflights notify me if prices for flights from Detroit to St. Louis become cheaper?

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