$99 Cheap Flights from McAllen (MFE) to St. Louis (STL)

View $99 flight on Tue, Dec 9, 2025Opens in a new window

Popular airlines from Miller Intl. Airport (MFE) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from McAllen to St. Louis (MFE-STL)

Prices were available within the past 7 days and start at $99 for one-way flights and $197 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Nov 1 - Sat, Nov 15
MFE
McAllen
STL
St. Louis
$197 Roundtrip, found 2 days ago
$197
Roundtrip
found 2 days ago
Select United flight, departing Sat, Nov 1 from McAllen to St. Louis, returning Sat, Nov 15, priced at $197 found 2 days ago
United
Fri, Oct 3 - Sun, Oct 5
MFE
McAllen
STL
St. Louis
$198 Roundtrip, found 4 days ago
$198
Roundtrip
found 4 days ago
Select United flight, departing Fri, Oct 3 from McAllen to St. Louis, returning Sun, Oct 5, priced at $198 found 4 days ago
United
Sat, Nov 1 - Sat, Nov 15
MFE
McAllen
STL
St. Louis
$202 Roundtrip, found 2 days ago
$202
Roundtrip
found 2 days ago
Select United flight, departing Sat, Nov 1 from McAllen to St. Louis, returning Sat, Nov 15, priced at $202 found 2 days ago
Delta
Tue, Oct 28 - Mon, Nov 10
MFE
McAllen
STL
St. Louis
$203 Roundtrip, found 2 hours ago
$203
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Oct 28 from McAllen to St. Louis, returning Mon, Nov 10, priced at $203 found 2 hours ago
United
Sat, Nov 1 - Sat, Nov 15
MFE
McAllen
STL
St. Louis
$204 Roundtrip, found 2 days ago
$204
Roundtrip
found 2 days ago
Select United flight, departing Sat, Nov 1 from McAllen to St. Louis, returning Sat, Nov 15, priced at $204 found 2 days ago
Delta
Tue, Oct 28 - Tue, Nov 11
MFE
McAllen
STL
St. Louis
$207 Roundtrip, found 2 hours ago
$207
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Oct 28 from McAllen to St. Louis, returning Tue, Nov 11, priced at $207 found 2 hours ago
Delta
Fri, Jan 30 - Sun, Feb 8
MFE
McAllen
STL
St. Louis
$233 Roundtrip, found 4 days ago
$233
Roundtrip
found 4 days ago
Select Delta flight, departing Fri, Jan 30 from McAllen to St. Louis, returning Sun, Feb 8, priced at $233 found 4 days ago
American Airlines
Tue, Oct 28 - Mon, Nov 10
MFE
McAllen
STL
St. Louis
$234 Roundtrip, found 2 hours ago
$234
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Tue, Oct 28 from McAllen to St. Louis, returning Mon, Nov 10, priced at $234 found 2 hours ago
Delta
Tue, Oct 28 - Mon, Nov 10
MFE
McAllen
STL
St. Louis
$235 Roundtrip, found 2 hours ago
$235
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Oct 28 from McAllen to St. Louis, returning Mon, Nov 10, priced at $235 found 2 hours ago
Delta
Sat, Nov 1 - Sat, Nov 15
MFE
McAllen
STL
St. Louis
$237 Roundtrip, found 2 days ago
$237
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Nov 1 from McAllen to St. Louis, returning Sat, Nov 15, priced at $237 found 2 days ago

Find the cheapest month to fly from McAllen (MFE) to St. Louis (STL)

October is typically the cheapest month to fly

From $196 - $424 per traveler.

Frequently asked questions

How much does a flight from Miller Intl. Airport (MFE) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight from $99 or cheap return flight from $197 from Miller Intl. Airport (MFE) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Miller Intl. Airport (MFE) to Lambert-St. Louis Intl. Airport (STL)?
Planning your getaway for November may help you find better deals, as it's the cheapest month for flights between MFE and STL. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Miller Intl. Airport (MFE) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest MFE to STL flight.
How many flights per day from Miller Intl. Airport (MFE) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily nonstop flights available from Miller Intl. Airport (MFE) to Lambert-St. Louis Intl. Airport (STL). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from MFE to STL?
Typically you'll have the most choice when it comes to flights on a Friday. Tuesdays tend to be the quietest.* However, this can change depending on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Miller Intl. Airport (MFE) to Lambert-St. Louis Intl. Airport (STL)?
Opt for a flight from Miller Intl. Airport (MFE) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the likelihood of delays. Departures later than this 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 Miller Intl. Airport (MFE) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your plane ticket from MFE to STL shortly before your trip is typically more expensive. But if there's some wiggle room with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a MFE to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a MFE to STL flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one place takes the hassle out of travel planning. Just pick your flights and select from our wide range of hotels, then personalize your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Miller Intl. Airport (MFE) to Lambert-St. Louis Intl. Airport (STL)?
It's generally possible to reschedule or cancel your MFE to STL flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Travel information

Origin airport
Miller Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$196
Distance
980 mi

Book with confidence

Book with confidence

McAllen to St. Louis Flights

The cheapest times to fly from McAllen 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 McAllen to St. Louis are during the month of November. You can find some of the cheapest flights from McAllen to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from McAllen 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 McAllen 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 McAllen to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $99 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 McAllen 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 McAllen 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.

 

McAllen to St. Louis Flights

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Explore a world of travel with Expedia

*Available to One Key members.