What are the cheapest airlines to fly from St. Louis to Mexico one-way?

For one-way options, check prices for Delta. According to our data, you can fly for as low as $165. Users have also found prices from $178 and $194 on Frontier and Air Canada, respectively.

What are the most popular routes from St. Louis to Mexico?

The most popular route from St. Louis to Mexico is Lambert-St Louis - Cancun. You may also consider Lambert-St Louis - Cozumel or Lambert-St Louis - Mexico City Benito Juarez.

What are the most popular airlines that fly from St. Louis to Mexico?

The most popular airlines flying from St. Louis to Mexico are American Airlines, Aeromexico and Delta. Something to consider prior to booking your flight.

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

Find a great deal and save up to 56% by booking at least 20 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Mexico within the next two weeks, with the cheapest ticket starting at $510.

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

May can be a great time to fly to Mexico from St. Louis with a flight ticket averaging about $625. Cheapflights users have found deals in the month of May for as cheap as $482. The most expensive prices can be found in the month of December.

What airport do you fly from for flights from St. Louis to Mexico?

Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly out of when you book flights from St. Louis to Mexico.

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

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

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

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

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

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

$452+ Flights from St. Louis to Mexico

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Cheap flight deals from St. Louis to Mexico

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$359 (Aeromexico)
One-way from	$156 (Kiwi.com)
Popular in	December
Cheapest in	May
Average price	$603
Good round-trip deal	$426 or less
Good one-way deal	$179 or less

Provider with most accurate pricing for Lambert-St Louis-Mexico City Benito Juarez flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Mexico City Benito Juarez flights.

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From Lambert-St Louis to Mexico

Search Deals

One-way flight from Lambert-St Louis to Mexico

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($37 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

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Price to beat on a round-trip flight from Lambert-St Louis to Mexico.

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Price to beat on a one-way flight from Lambert-St Louis to Mexico.

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Find flight deals from St. Louis to Mexico

Cheapest flights from St. Louis to Mexico
Explore the most affordable flight options available from St. Louis to Mexico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2025.

Mon 6/169:09 amSTL - CUN

2 stops12h 26mAeromexico

Fri 6/278:00 amCUN - STL

1 stop8h 22mAeromexico

Deal found 4/2

$359

Fri 4/186:00 amSTL - CUN

Nonstop3h 28mMultiple Airlines

Thu 4/249:10 amCUN - STL

1 stop14h 54mMultiple Airlines

Deal found 4/2

$366

Tue 4/156:00 amSTL - CUN

Nonstop3h 28mFrontier

Sun 4/2011:46 amCUN - STL

Nonstop3h 26mFrontier

Deal found 4/1

$377

Sat 5/38:15 pmSTL - GDL

2 stops29h 10mMultiple Airlines

Tue 5/68:09 amGDL - STL

1 stop14h 57mMultiple Airlines

Deal found 4/2

$380

Sun 9/146:00 amSTL - SJD

2 stops14h 01mDelta

Tue 9/306:01 amSJD - STL

2 stops12h 48mDelta

Deal found 4/2

$395

Fri 6/2010:44 amSTL - CUN

1 stop9h 36mDelta

Tue 6/248:40 amCUN - STL

2 stops15h 02mDelta

Deal found 4/2

$399

Fri 5/96:53 pmSTL - MEX

2 stops27h 27mMultiple Airlines

Fri 5/1611:05 amMEX - STL

1 stop12h 09mMultiple Airlines

Deal found 4/1

$400

Thu 9/45:35 amSTL - SJD

1 stop5h 34mAmerican Airlines

Tue 9/912:10 pmSJD - STL

2 stops8h 17mAmerican Airlines

Deal found 4/2

$439

Thu 5/11:30 pmSTL - MEX

1 stop10h 25mAir Canada

Mon 5/54:55 amMEX - STL

1 stop14h 03mAir Canada

Deal found 4/3

$440

Sat 5/2410:10 amSTL - CUN

1 stop25h 03mSpirit Airlines

Fri 5/3012:18 pmCUN - STL

1 stop20h 57mSpirit Airlines

Deal found 4/2

$444

Sun 6/158:25 amSTL - CUN

1 stop13h 42mUnited Airlines

Tue 6/247:51 amCUN - STL

1 stop14h 24mUnited Airlines

Deal found 4/2

$449

Sat 5/107:19 pmSTL - CZM

1 stop18h 41mAmerican Airlines

Tue 5/202:35 pmCZM - STL

1 stop6h 44mAmerican Airlines

Deal found 4/1

$457

Best flights from St. Louis to Mexico
Discover carefully curated flight deals from St. Louis to Mexico that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 3, 2025.

Mon 6/169:09 amSTL - CUN

2 stops12h 26mAeromexico

Fri 6/278:00 amCUN - STL

1 stop8h 22mAeromexico

Deal found 4/2

$359

Fri 4/186:00 amSTL - CUN

Nonstop3h 28mMultiple Airlines

Thu 4/249:10 amCUN - STL

1 stop14h 54mMultiple Airlines

Deal found 4/2

$366

Tue 4/156:00 amSTL - CUN

Nonstop3h 28mFrontier

Sun 4/2011:46 amCUN - STL

Nonstop3h 26mFrontier

Deal found 4/1

$377

Fri 6/2010:44 amSTL - CUN

1 stop9h 36mDelta

Tue 6/243:25 pmCUN - STL

1 stop8h 17mDelta

Deal found 4/2

$399

Thu 5/11:30 pmSTL - MEX

1 stop10h 25mAir Canada

Mon 5/54:55 amMEX - STL

1 stop14h 03mAir Canada

Deal found 4/2

$440

Sat 5/2410:10 amSTL - CUN

1 stop25h 03mSpirit Airlines

Fri 5/3012:18 pmCUN - STL

1 stop20h 57mSpirit Airlines

Deal found 4/2

$444

Sun 6/158:25 amSTL - CUN

1 stop13h 42mUnited Airlines

Tue 6/247:51 amCUN - STL

1 stop14h 24mUnited Airlines

Deal found 4/2

$449

Sat 5/107:19 pmSTL - CZM

1 stop18h 41mAmerican Airlines

Tue 5/202:00 pmCZM - STL

1 stop7h 45mAmerican Airlines

Deal found 4/2

$457

Tue 8/267:45 amSTL - CUN

1 stop8h 15mSouthwest

Sat 8/301:20 pmCUN - STL

Nonstop3h 05mSouthwest

Deal found 4/2

$517

Mon 5/126:52 amSTL - SJD

1 stop9h 32mAlaska Airlines

Thu 5/1511:16 amSJD - STL

1 stop9h 48mAlaska Airlines

Deal found 4/2

$542

Sat 5/38:15 pmSTL - GDL

2 stops29h 10mMultiple Airlines

Tue 5/68:09 amGDL - STL

1 stop14h 57mMultiple Airlines

Deal found 4/2

$380

Fri 5/96:53 pmSTL - MEX

2 stops27h 27mMultiple Airlines

Fri 5/1611:05 amMEX - STL

1 stop12h 09mMultiple Airlines

Deal found 4/1

$400

Last-minute flights from St. Louis to Mexico
Discover last-minute flight deals from St. Louis to Mexico. Data last updated April 3, 2025 and is based on user searches.

Thu 4/36:00 amSTL - CUN

Nonstop3h 28mVolaris

Fri 4/411:46 amCUN - STL

Nonstop3h 26mVolaris

Deal found 4/2

$458

Sat 4/56:51 pmSTL - MEX

1 stop23h 39mMultiple Airlines

Wed 4/911:00 amMEX - STL

1 stop24h 16mMultiple Airlines

Deal found 4/2

$520

Tue 4/86:15 amSTL - CZM

1 stop7h 04mUnited Airlines

Tue 4/151:21 pmCZM - STL

1 stop7h 48mUnited Airlines

Deal found 3/31

$539

Tue 4/87:05 amSTL - SJD

2 stops13h 17mDelta

Sat 4/1210:48 amSJD - STL

1 stop10h 16mDelta

Deal found 4/2

$692

Tue 4/812:15 pmSTL - SJD

3 stops21h 32mMultiple Airlines

Sat 4/128:22 amSJD - STL

3 stops30h 53mMultiple Airlines

Deal found 4/2

$790

Tue 4/87:05 amSTL - CZM

1 stop6h 55mAeromexico

Tue 4/153:48 pmCZM - STL

2 stops22h 18mAeromexico

Deal found 4/1

$844

Wed 4/96:00 amSTL - CUN

1 stop10h 19mDelta

Sat 4/123:15 pmCUN - STL

1 stop7h 49mDelta

Deal found 4/2

$399

Wed 4/96:00 amSTL - CUN

Nonstop3h 28mMultiple Airlines

Sat 4/1211:46 amCUN - STL

Nonstop3h 26mMultiple Airlines

Deal found 4/2

$424

Wed 4/96:30 amSTL - CUN

2 stops12h 50mUnited Airlines

Sat 4/127:51 amCUN - STL

2 stops13h 59mUnited Airlines

Deal found 4/2

$493

Wed 4/95:26 amSTL - MEX

1 stop5h 54mAmerican Airlines

Sat 4/125:15 pmMEX - STL

1 stop14h 46mAmerican Airlines

Deal found 4/2

$556

Wed 4/96:00 amSTL - MEX

2 stops10h 40mDelta

Sat 4/129:10 amMEX - STL

2 stops13h 19mDelta

Deal found 4/2

$614

Sat 4/126:00 amSTL - CUN

Nonstop3h 28mFrontier

Sun 4/2011:46 amCUN - STL

Nonstop3h 26mFrontier

Deal found 4/2

$414

One-way flights from St. Louis to Mexico
Search for one-way flight options from St. Louis to Mexico. Find affordable one-way fares based on user searches. Data last updated April 3, 2025.

Wed 5/145:45 pmSTL - CUN

1 stop14h 31mMultiple Airlines

Deal found 4/1

$156

Wed 5/287:55 pmSTL - SJD

3 stops49h 30mMultiple Airlines

Deal found 4/2

$162

Wed 6/111:32 pmSTL - CUN

1 stop6h 48mDelta

Deal found 4/1

$165

Tue 9/306:00 amSTL - SJD

1 stop7h 30mDelta

Deal found 4/2

$173

Wed 5/146:38 amSTL - CUN

Nonstop3h 12mFrontier

Deal found 4/1

$178

Sun 6/221:30 pmSTL - MEX

1 stop10h 25mAir Canada

Deal found 4/2

$194

Sat 4/261:00 pmSTL - GDL

3 stops45h 45mMultiple Airlines

Deal found 4/1

$195

Thu 6/128:25 amSTL - CUN

1 stop13h 42mUnited Airlines

Deal found 4/1

$205

Sat 4/121:00 pmSTL - MLM

3 stops50h 40mMultiple Airlines

Deal found 4/1

$220

Fri 5/3010:36 amSTL - GDL

1 stop13h 19mAmerican Airlines

Deal found 4/2

$222

Sat 5/37:10 amSTL - CZM

1 stop6h 50mAeromexico

Deal found 4/2

$226

Fri 5/166:10 amSTL - MEX

1 stop12h 10mFrontier

Deal found 4/1

$238

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Mexico that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 6/16

9:09 am-8:35 pm

2 stops11h 26m

Cancun

Thu 6/26

9:55 am-4:22 pm

1 stop6h 27m

$359

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Fri 4/18

6:00 am-9:28 am

Nonstop3h 28m

Cancun

Thu 4/24

9:10 am-12:04 am

1 stop14h 54m

$366

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 4/15

6:00 am-9:28 am

Nonstop3h 28m

Cancun

Sun 4/20

11:46 am-3:12 pm

Nonstop3h 26m

$377

St. LouisGuadalajara

STL - GDL

STLGDL

Lambert-St Louis

Sat 5/3

8:15 pm-12:25 am

2 stops29h 10m

Guadalajara Miguel Hidal

Tue 5/6

8:09 am-12:06 am

1 stop14h 57m

$380

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

Sun 9/14

6:00 am-6:01 pm

2 stops14h 01m

San José del Cabo Los Cabos

Tue 9/30

6:01 am-8:49 pm

2 stops12h 48m

$395

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Fri 5/9

6:53 pm-9:20 pm

2 stops27h 27m

Mexico City Benito Juarez

Fri 5/16

11:05 am-12:14 am

1 stop12h 09m

$400

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

Thu 9/4

5:35 am-9:09 am

1 stop5h 34m

San José del Cabo Los Cabos

Tue 9/9

12:10 pm-10:27 pm

2 stops8h 17m

$439

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Thu 5/1

1:30 pm-10:55 pm

1 stop10h 25m

Mexico City Benito Juarez

Mon 5/5

4:55 am-7:58 pm

1 stop14h 03m

$440

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sat 5/24

10:10 am-11:13 am

1 stop25h 03m

Cancun

Fri 5/30

12:18 pm-9:15 am

1 stop20h 57m

$444

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 6/15

8:25 am-10:07 pm

1 stop13h 42m

Cancun

Tue 6/24

7:51 am-10:15 pm

1 stop14h 24m

$449

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

Showing 1-10 of 49 results

...

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

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

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Currently, May is the cheapest month in which you can book a flight from St. Louis to Mexico (average of $400). Flying from St. Louis to Mexico in December is currently the most expensive (average of $615). 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.

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

When flying from St. Louis to Mexico, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Mexico by month

In terms of precipitation, rainfall in Mexico ranges from 0.0 - 4.7 inches per month. July is typically the wettest month, when rainfall can reach 4.7 in. January is typically the driest time to visit Mexico when rainfall is around 0.0 in.

Temperature in Mexico by month

If weather is an important factor for your trip to Mexico, use this chart to help with planning. For those seeking warmer temperatures, May is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 55.4 F).

Reviews of airlines servicing Mexico

Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from St. Louis to Mexico. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,825 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines

8.0

Very good

9,825 reviews

Alaska Airlines

8.0

Very good

9,825 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Southwest

8.0

Very good

4,274 reviews

Alaska Airlines

8.0

Very good

9,825 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta

8.0

Very good

7,897 reviews

Alaska Airlines

8.0

Very good

9,825 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Aeromexico

7.5

Good

1,701 reviews

Alaska Airlines

8.0

Very good

9,825 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines

7.4

Good

8,619 reviews

Alaska Airlines

8.0

Very good

9,825 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

What airport do you fly from for flights from St. Louis to Mexico?
Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly out of when you book flights from St. Louis to Mexico.
What are the cheapest airlines to fly from St. Louis to Mexico one-way?
For one-way options, check prices for Delta. According to our data, you can fly for as low as $165. Users have also found prices from $178 and $194 on Frontier and Air Canada, respectively.
What are the most popular routes from St. Louis to Mexico?
The most popular route from St. Louis to Mexico is Lambert-St Louis - Cancun. You may also consider Lambert-St Louis - Cozumel or Lambert-St Louis - Mexico City Benito Juarez.
Can I find deals for flights from St. Louis to Mexico that include hotel bookings?
Yes. In addition to deals on St. Louis to Mexico flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Mexico?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Mexico.
Can I find deals for business class flights from St. Louis to Mexico?
Yes. Cheapflights offers flight deals from St. Louis to Mexico by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Mexico?
Currently, May is the cheapest month in which you can book a flight from St. Louis to Mexico (average of $400). Flying from St. Louis to Mexico in December is currently the most expensive (average of $615). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 8 airlines flying from St. Louis to Mexico

Airline	Cheapest	Average	Flexibility	On-time
Volaris	Cheapest$175	Average$382	FlexibilityNo cancel fee	On-time79%
Frontier	Cheapest$285	Average$552	FlexibilityNo cancel fee	On-time62%
Aeromexico	Cheapest$331	Average$509	FlexibilityNo cancel fee	On-timeN/A
Delta	Cheapest$386	Average$548	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$387	Average$618	FlexibilityNo cancel fee	On-time69%
Alaska Airlines	Cheapest$398	Average$528	FlexibilityNo cancel fee	On-time75%
American Airlines	Cheapest$409	Average$584	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$517	Average$739	FlexibilityNo cancel fee	On-time63%

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$151+ Cheap flights from St. Louis (STL) to Mexico

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/3. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Mexico with Cheapflights

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Cheap flight deals from St. Louis to Mexico

Keep the following information in mind while searching for St. Louis to Mexico flight deals. Data was last updated April 3, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from St. Louis to Mexico

Cheapest flights from St. Louis to MexicoExplore the most affordable flight options available from St. Louis to Mexico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2025.

Explore the most affordable flight options available from St. Louis to Mexico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Mexico that are best for you.

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

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

Cheapflights Insights

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

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

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

Find hourly flight availability from St. Louis to Mexico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 3, 2025.

Rainfall in Mexico by month

Plan your trip to Mexico by taking into account the average rainfall totals by month.

Temperature in Mexico by month

Plan your trip to Mexico by taking into account the average temperature totals by month.

Reviews of airlines servicing Mexico

Get insights into the airlines that provide service to Mexico. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Mexico. Reviews last updated April 3, 2025.

Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from St. Louis to Mexico. You can also see how each airline stacks up 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 St. Louis to Mexico. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from St. Louis to Mexico?

What are the cheapest airlines to fly from St. Louis to Mexico one-way?

What are the most popular routes from St. Louis to Mexico?

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Mexico

See prices for flight routes from nearby airports that may be better suited for you.

Top 8 airlines flying from St. Louis to Mexico

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Cheapest flights from St. Louis to Mexico
Explore the most affordable flight options available from St. Louis to Mexico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2025.