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$89 Cheap Flights from Detroit (DTW) to St. Louis (STL)

View $89 flight on Mon, Oct 5, 2026Opens in a new window

Popular airlines from Detroit Metropolitan Wayne County Airport (DTW) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Detroit to St. Louis (DTW-STL)

Prices were available within the past 7 days and start at $89 for one-way flights and $178 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Oct 17 - Mon, Oct 19
DTW
Detroit
STL
St. Louis
$178 Roundtrip, found 2 hours ago
$178
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Oct 17 from Detroit to St. Louis, returning Mon, Oct 19, priced at $178 found 2 hours ago
Frontier Airlines
Wed, Sep 16 - Wed, Sep 30
DTW
Detroit
STL
St. Louis
$188 Roundtrip, just found
$188
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, Sep 16 from Detroit to St. Louis, returning Wed, Sep 30, priced at $188 just found
Frontier Airlines
Wed, Sep 30 - Mon, Oct 5
DTW
Detroit
STL
St. Louis
$194 Roundtrip, found 9 hours ago
$194
Roundtrip
found 9 hours ago
Select Frontier Airlines flight, departing Wed, Sep 30 from Detroit to St. Louis, returning Mon, Oct 5, priced at $194 found 9 hours ago
Frontier Airlines
Sat, Oct 17 - Mon, Oct 19
DTW
Detroit
STL
St. Louis
$196 Roundtrip, found 2 hours ago
$196
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Oct 17 from Detroit to St. Louis, returning Mon, Oct 19, priced at $196 found 2 hours ago
Frontier Airlines
Fri, Sep 11 - Mon, Sep 14
DTW
Detroit
STL
St. Louis
$206 Roundtrip, found 2 hours ago
$206
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Fri, Sep 11 from Detroit to St. Louis, returning Mon, Sep 14, priced at $206 found 2 hours ago
Frontier Airlines
Sat, Oct 17 - Mon, Oct 19
DTW
Detroit
STL
St. Louis
$209 Roundtrip, found 2 hours ago
$209
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Oct 17 from Detroit to St. Louis, returning Mon, Oct 19, priced at $209 found 2 hours ago
Southwest Airlines
Sat, Oct 17 - Mon, Oct 19
DTW
Detroit
STL
St. Louis
$218 Roundtrip, found 2 hours ago
$218
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Sat, Oct 17 from Detroit to St. Louis, returning Mon, Oct 19, priced at $218 found 2 hours ago
Delta
Wed, Sep 16 - Wed, Sep 30
DTW
Detroit
STL
St. Louis
$228 Roundtrip, just found
$228
Roundtrip
just found
Select Delta flight, departing Wed, Sep 16 from Detroit to St. Louis, returning Wed, Sep 30, priced at $228 just found
American Airlines
Thu, Oct 15 - Mon, Oct 19
DTW
Detroit
STL
St. Louis
$233 Roundtrip, found 4 hours ago
$233
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Thu, Oct 15 from Detroit to St. Louis, returning Mon, Oct 19, priced at $233 found 4 hours ago
Alaska Airlines
Sat, May 29 - Mon, May 31
DTW
Detroit
STL
St. Louis
$923 Roundtrip, found 3 hours ago
$923
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Sat, May 29 from Detroit to St. Louis, returning Mon, May 31, priced at $923 found 3 hours ago

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $757
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $757

Find the cheapest month to fly from Detroit (DTW) to St. Louis (STL)

February is typically the cheapest month to fly

From $128 - $339 per traveler.

What you need to know for your flight from Detroit Metropolitan Wayne County to Lambert-St. Louis Intl.

Detroit (DTW) to St. Louis (STL) at a glance

Travel from Detroit (DTW) to St. Louis (STL) with a range of airlines servicing this popular domestic short-haul route. Whether you prefer full-service options or are looking for cheap flights from Detroit, you'll find various choices to match your budget and schedule. As you prepare to explore the vibrant sights and neighborhoods of St. Louis, check out essential flight details from Detroit Metropolitan Wayne County Airport (DTW) to Lambert-St. Louis International Airport (STL) for a smooth journey.

  • Fastest flight duration: around 1h 45m non-stop
  • Route distance: roughly 450 miles (725 km)
  • Flights per week: around 15+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $60–$405, depending on seasonality and how far ahead you book

Flights from Detroit Metropolitan Wayne County Airport (DTW) to Lambert-St. Louis International Airport (STL)

According to recent traveler bookings, here are the top airlines favored for flights from Detroit to St. Louis, featuring both non-stop and one-stop options. Popular layover airports include O'Hare International Airport (ORD), with a layover of approximately 1 hour and 15 minutes, Orlando International Airport (MCO), which has about a 4-hour layover, and Charlotte-Douglas International Airport (CLT), also around 1 hour and 15 minutes. This variety allows you to choose the best itinerary based on price, total travel time, and cabin class.

  • Delta: This full-service airline provides non-stop flights, representing around 68% of all departures on this route. One-way fares generally fall between $60 and $415, and the total travel duration is approximately 1 hour and 45 minutes.
  • Southwest Airlines: As a budget-friendly carrier, Southwest offers both non-stop and one-stop options. With about 25% of departures on this route, their one-way tickets usually range from $60 to $380, and non-stop flights take around 1 hour and 45 minutes.
  • American Airlines: A full-service provider, American Airlines offers one-stop services, accounting for roughly 3% of departures. Their one-way fares typically vary from $95 to $360, with an in-flight duration of about 3 hours and 30 minutes and a total journey time close to 5 hours, including layover.
  • Frontier Airlines: This low-cost option provides one-stop services, making up about 2% of route departures. With one-way fares usually ranging from $65 to $245, travelers can expect an in-flight time of around 3 hours and 30 minutes, leading to a total journey time of about 5 hours, including layover.
  • United: Another full-service carrier, United offers one-stop flights and comprises roughly 1% of departures on this route. Their one-way fares typically range from $110 to $390, with an in-flight duration of approximately 3 hours and 30 minutes, culminating in a total travel time of about 5 hours, including layover.

Travelers flying from Detroit to St. Louis can opt to enhance their experience by upgrading their flight. Delta provides first class and premium economy service on this route.

Best time to fly from Detroit (DTW) to St. Louis (STL)

The most popular months for travelers flying from Detroit to St. Louis are March, April, and September, when peak temperatures in St. Louis reach up to 70.9°F in September. If you prefer quieter travel, consider June, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 76.1°F. For better deals, August usually offers the lowest average one-way fare around $143. Flight availability peaks in October, with approximately 23 flights per week, making it easier to find convenient departure times. January and February have the fewest flights, with approximately 13 flights per week.

  • Cheapest time to fly: August usually offers good deals with average one-way fare around $143, roughly 32% cheaper than the yearly average.
  • Another budget-friendly time to fly: July typically offers an average one-way fare of around $157.
  • Most flight options: October has the highest number of flights from Detroit to St. Louis, with approximately 23 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January31.6°F (-0.2°C)Moderately Low13$273
February34.9°F (1.6°C)Average13$272
March46.4°F (8.0°C)Moderately High15$252
April56.1°F (13.4°C)Moderately High19$231
May66.6°F (19.2°C)Average16$193
June76.1°F (24.5°C)Moderately Low17$183
July78.6°F (25.9°C)Average21$157
August77.0°F (25.0°C)Average18$143
September70.9°F (21.6°C)Moderately High21$164
October58.6°F (14.8°C)Average23$207
November46.2°F (7.9°C)Average18$221
December37.8°F (3.2°C)Moderately Low15$248

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Detroit (DTW) to St. Louis (STL)

  • Detroit to St. Louis (DTW-SUS): Located approximately 16 miles from Lambert-St. Louis International Airport (STL), Spirit of St. Louis Airport (SUS) serves as a convenient alternative for travelers.
  • Detroit to St. Louis (DTW-CPS): St. Louis Downtown Airport (CPS) is also around 16 miles from Lambert-St. Louis International Airport (STL), providing another option for those flying from Detroit.

How to find the best prices for flights from Detroit (DTW) to St. Louis (STL)

Getting some of the best deals on flights from Detroit to St. Louis is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually found by booking at least two months in advance, although most travelers tend to book within two to eight weeks. Evening departures, from 6 PM to 12 AM, generally offer lower prices, while afternoon flights from 12 PM to 6 PM are the most popular. Additionally, flying on Fridays provides both cheaper prices and is the most favored travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Lambert-St. Louis International Airport from Detroit Metropolitan Wayne County Airport

St. Louis welcomes travelers from Detroit with a range of transport options based on price, convenience, and proximity. Here's how to reach St. Louis efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in St. Louis, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Lambert-St. Louis International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Lambert-St. Louis International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Lambert-St. Louis International Airport, Lambert Main Terminal Station, a metro station, is located about 0.1 miles away on foot, offering easy access for travelers looking to reach the city.

Frequently asked questions

How much does a flight from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find cheap one-way flights from $89 and cheap return flights from $178 Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.) with Expedia. One-way flights typically cost between $153 and $579, and return flights often range between $282 and $990. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
August is typically the cheapest month to fly from Detroit, MI (DTW) to St. Louis, MO (STL), with average round-trip fares around $213. This price is about 31% lower than the average throughout the year, as summer travel often leads to lower demand for flights. Other budget-friendly months include July and September.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Delta offers around 29 weekly direct flights from DTW to STL.
How do I find cheap flights from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
To find a cheap flight from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best airline to fly with from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will differ from traveler to traveler. If you like to fly early, Delta offers early morning flights. If price is the most important factor, Spirit Airlines typically offers the lowest fares. American Airlines offers the most daily flights from DTW to STL, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best time to fly from Detroit (DTW) to St. Louis (STL) is in July or August. July is particularly popular, with an average price of about $213. These months are great for travelers looking for a balance of affordability and convenience, making your trip to St. Louis enjoyable.*Prices based on flights available on Expedia in the last year.
How many flights per day from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You can find approximately 6 nonstop flights per day from Detroit Metropolitan Wayne County (DTW) to Lambert-St. Louis Intl. (STL). For more options, look at flights that include layovers.
What is the earliest flight from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The earliest flight from Detroit Metropolitan Wayne County Airport (DTW) to Lambert-St. Louis International Airport (STL) usually departs at 5:00 AM, operated by American Airlines and Southern Airways Express. This seasonal service is available in July and August, allowing you to start your day early in St. Louis. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Detroit Metropolitan Wayne County (DTW) to Lambert-St. Louis Intl. (STL) are in the early morning, from 6am to 9am. About 26% of passengers prefer this time window. Many major carriers, including American Airlines and United Airlines, offer flights during this window. This timing is popular because it allows you to start your day early and arrive in St. Louis with plenty of time to explore.
How long does it take to fly from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Direct flights from DTW to STL usually take about 1 hour 50 minutes, traveling roughly 440 miles. If you opt for a connecting flight, expect to add around 4 hours 40 minutes to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You can fly first class between DTW and STL. First class cabins are available on:

  • American Airlines
  • United Airlines
  • Delta Air Lines

How much is a business class flight from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
A non-stop, one-way business class flight from Detroit (DTW) to St. Louis (STL) is usually around $593 - $661. You may also be able to find a cheaper business class journey between Detroit to St. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight with Expedia?
It's easy to earn miles on a Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for St. Louis from Detroit Metropolitan Wayne County (DTW)?
From Detroit Metropolitan Wayne County (DTW), you can fly into Lambert-St. Louis Intl. (STL) to reach St. Louis. Some flights may connect through major hubs like Washington Dulles Intl. (IAD), O'Hare Intl. (ORD), Baltimore Washington Intl. Thurgood Marshall (BWI) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.) at the last minute?
Typically, booking a last minute flight from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package?
Securing a Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.) St Louis Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you booked your Detroit, MI (DTW-Detroit Metropolitan Wayne County) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

0
Origin airport
Detroit Metropolitan Wayne County
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$178
Distance
439 mi

Book with confidence

Detroit to St. Louis Flights

The cheapest times to fly from Detroit to St. Louis

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 Detroit to St. Louis are during the month of October. You can find some of the cheapest flights from Detroit to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Detroit to St. Louis: 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 Detroit to St. Louis

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 Detroit to St. Louis in 2026. You can also book with separate airlines for your outbound and return journeys, from $89 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 Detroit to St. Louis 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 Detroit to St. Louis 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.

 

Detroit to St. Louis Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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