$346 Cheap Flights from St. Louis (STL) to Los Mochis (LMM)

View $346 flight on Mon, Jan 26, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Los Mochis, Sinaloa (LMM-Federal del Valle del Fuerte Intl.)

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Cheap Flights from St. Louis to Los Mochis (STL-LMM)

Prices were available within the past 7 days and start at $346 for one-way flights and $604 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aeromexico
Mon, Jan 26 - Tue, Feb 3
STL
St. Louis
LMM
Los Mochis
$604 Roundtrip, found 1 day ago
$604
Roundtrip
found 1 day ago
Select Aeromexico flight, departing Mon, Jan 26 from St. Louis to Los Mochis, returning Tue, Feb 3, priced at $604 found 1 day ago
Delta
Mon, Jan 26 - Tue, Feb 3
STL
St. Louis
LMM
Los Mochis
$604 Roundtrip, found 1 day ago
$604
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Jan 26 from St. Louis to Los Mochis, returning Tue, Feb 3, priced at $604 found 1 day ago
Aeromexico
Wed, Jan 28 - Fri, Feb 6
STL
St. Louis
LMM
Los Mochis
$624 Roundtrip, found 1 day ago
$624
Roundtrip
found 1 day ago
Select Aeromexico flight, departing Wed, Jan 28 from St. Louis to Los Mochis, returning Fri, Feb 6, priced at $624 found 1 day ago
Delta
Mon, Jan 26 - Tue, Feb 3
STL
St. Louis
LMM
Los Mochis
$634 Roundtrip, found 1 day ago
$634
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Jan 26 from St. Louis to Los Mochis, returning Tue, Feb 3, priced at $634 found 1 day ago
Aeromexico
Mon, Jan 26 - Thu, Feb 5
STL
St. Louis
LMM
Los Mochis
$654 Roundtrip, found 1 day ago
$654
Roundtrip
found 1 day ago
Select Aeromexico flight, departing Mon, Jan 26 from St. Louis to Los Mochis, returning Thu, Feb 5, priced at $654 found 1 day ago
Delta
Mon, Jan 26 - Tue, Feb 3
STL
St. Louis
LMM
Los Mochis
$664 Roundtrip, found 1 day ago
$664
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Jan 26 from St. Louis to Los Mochis, returning Tue, Feb 3, priced at $664 found 1 day ago
Aeromexico
Mon, Jan 26 - Thu, Feb 5
STL
St. Louis
LMM
Los Mochis
$684 Roundtrip, found 1 day ago
$684
Roundtrip
found 1 day ago
Select Aeromexico flight, departing Mon, Jan 26 from St. Louis to Los Mochis, returning Thu, Feb 5, priced at $684 found 1 day ago
Delta
Mon, Jan 26 - Tue, Feb 3
STL
St. Louis
LMM
Los Mochis
$694 Roundtrip, found 1 day ago
$694
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Jan 26 from St. Louis to Los Mochis, returning Tue, Feb 3, priced at $694 found 1 day ago
Aeromexico
Mon, Jan 26 - Tue, Feb 3
STL
St. Louis
LMM
Los Mochis
$704 Roundtrip, found 1 day ago
$704
Roundtrip
found 1 day ago
Select Aeromexico flight, departing Mon, Jan 26 from St. Louis to Los Mochis, returning Tue, Feb 3, priced at $704 found 1 day ago
Aeromexico
Mon, Jan 26 - Tue, Feb 3
STL
St. Louis
LMM
Los Mochis
$712 Roundtrip, found 1 day ago
$712
Roundtrip
found 1 day ago
Select Aeromexico flight, departing Mon, Jan 26 from St. Louis to Los Mochis, returning Tue, Feb 3, priced at $712 found 1 day ago
Flights from St. Louis (STL) to Los Mochis (LMM)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Federal del Valle del Fuerte Intl.
Airlines serving
Aeromexico, Delta
Roundtrip price
$603
Distance
1412 mi

St. Louis to Los Mochis Flights

The cheapest times to fly from St. Louis to Los Mochis

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

 

The best time to book a flight from St. Louis to Los Mochis

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

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 Los Mochis in 2025. You can also book with separate airlines for your outbound and return journeys, from $346 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 Los Mochis 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 Los Mochis 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.

 

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Federal del Valle del Fuerte Intl. Airport (LMM) cost?
Discover the latest flight deals from STL to LMM by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from STL to LMM?
The cheapest flights from STL to LMM are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from STL to LMM?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from STL to LMM. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Federal del Valle del Fuerte Intl. Airport (LMM)?
You'll need to hop on a flight with a layover when traveling from Lambert-St. Louis Intl. Airport (STL) to Federal del Valle del Fuerte Intl. Airport (LMM). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from STL to LMM?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Federal del Valle del Fuerte Intl. Airport (LMM)?
Book a flight from Lambert-St. Louis Intl. Airport (STL) to Federal del Valle del Fuerte Intl. Airport (LMM) that takes off before 3 PM to reduce the risk of cancellations. Departures after this time are on average 22% more likely to be canceled.**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 Lambert-St. Louis Intl. Airport (STL) to Federal del Valle del Fuerte Intl. Airport (LMM) last-minute?
Booking your flight from STL to LMM just before your getaway is generally more expensive. But if there's some wiggle room with your departure times and dates, you could grab a cheap last-minute fare.
Is it cheaper to book a STL to LMM flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to LMM flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place will take the stress out of planning your trip. Just pick your flights and select from our extensive range of hotels, then tailor your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Federal del Valle del Fuerte Intl. Airport (LMM)?
If you booked your STL to LMM flight in the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.

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*Available to One Key members.