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Cheap flights from St. Louis to Mexico from $113

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Mexico departing on 9/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Mexico

Cheap round-trip flights

Frontier Logo
10:26 am - 1:46 pmSTL-CUN
3h 20mnonstop
Frontier Logo
2:49 pm - 6:10 pmCUN-STL
3h 21mnonstop
$243Frontier
Find Deal
Wed, Sep 3 - Fri, Sep 5
Frontier Logo
10:21 am - 1:34 pmSTL-CUN
3h 13mnonstop
Frontier Logo
2:49 pm - 6:10 pmCUN-STL
3h 21mnonstop
$244Frontier
Find Deal
Sat, Sep 13 - Sat, Sep 20
Delta Logo
9:19 am - 11:40 pmSTL-PVR
15h 21m2 stops
Delta Logo
6:05 am - 10:04 pmPVR-STL
14h 59m2 stops
$397Delta
Find Deal
Wed, Sep 24 - Tue, Oct 14
Delta Logo
7:00 am - 2:55 pmSTL-SJD
9h 55m2 stops
Delta Logo
6:01 am - 7:07 pmSJD-STL
11h 06m2 stops
$417Delta
Find Deal
Wed, Sep 3 - Wed, Sep 10
American Airlines Logo
7:16 am - 11:33 amSTL-SJD
6h 17m1 stop
American Airlines Logo
11:30 am - 8:15 pmSJD-STL
6h 45m1 stop
$420American Airlines
Find Deal
Fri, Sep 19 - Fri, Sep 26
American Airlines Logo
5:17 am - 9:10 amSTL-SJD
5h 53m1 stop
American Airlines Logo
1:13 pm - 9:12 amSJD-STL
17h 59m2 stops
$422American Airlines
Find Deal
Wed, Sep 3 - Wed, Sep 10
United Airlines Logo
6:15 am - 1:23 pmSTL-CZM
7h 08m1 stop
United Airlines Logo
2:25 pm - 12:28 pmCZM-STL
22h 03m2 stops
$502United Airlines
Find Deal
Tue, Nov 11 - Wed, Nov 19
United Airlines Logo
6:15 am - 11:43 amSTL-SJD
6h 28m1 stop
United Airlines Logo
2:11 pm - 9:58 pmSJD-STL
6h 47m1 stop
$513United Airlines
Find Deal
Fri, Nov 28 - Sat, Dec 6
Southwest Logo
5:35 am - 1:10 pmSTL-SJD
9h 35m1 stop
Southwest Logo
12:05 pm - 8:45 pmSJD-STL
6h 40m1 stop
$521Southwest
Find Deal
Sun, Sep 7 - Sat, Sep 13
Southwest Logo
8:55 am - 12:20 pmSTL-SJD
4h 25mnonstop
Southwest Logo
12:00 pm - 8:35 pmSJD-STL
7h 35m1 stop
$522Southwest
Find Deal
Sat, Jan 17 - Thu, Jan 22

Air Canada flights from St. Louis to Mexico

Our best Air Canada deals on St. Louis to Mexico flight tickets
Air Canada
Nov 22
STL4:05 pmLambert-St Louis
21h 25m
1 stop
PVR1:30 pmPuerto Vallarta Ordaz
Nov 27
PVR2:35 pmPuerto Vallarta Ordaz
24h 54m
1 stop
STL3:29 pmLambert-St Louis
$579
Find similar
Air Canada
Aug 17
STL4:00 pmLambert-St Louis
8h 15m
1 stop
MEX11:15 pmMexico City Benito Juarez
Aug 23
MEX12:15 amMexico City Benito Juarez
18h 30m
1 stop
STL7:45 pmLambert-St Louis
$752
Find similar
Air Canada
Aug 17
STL4:00 pmLambert-St Louis
8h 15m
1 stop
MEX11:15 pmMexico City Benito Juarez
Aug 23
MEX12:15 amMexico City Benito Juarez
18h 30m
1 stop
STL7:45 pmLambert-St Louis
$919
Find similar

Aeromexico flights from St. Louis to Mexico

Our best Aeromexico deals on St. Louis to Mexico flight tickets
Aeromexico
Jan 14
STL6:00 amLambert-St Louis
8h 00m
1 stop
CZM2:00 pmCozumel
Jan 20
CZM3:15 pmCozumel
5h 24m
1 stop
STL8:39 pmLambert-St Louis
$514
Find similar
Aeromexico
Jan 28
STL7:30 amLambert-St Louis
6h 30m
1 stop
CZM2:00 pmCozumel
Feb 1
CZM12:51 pmCozumel
10h 49m
2 stops
STL11:40 pmLambert-St Louis
$539
Find similar
Aeromexico
Aug 17
STL6:00 amLambert-St Louis
11h 00m
2 stops
MEX4:00 pmMexico City Benito Juarez
Aug 24
MEX7:00 amMexico City Benito Juarez
12h 33m
2 stops
STL8:33 pmLambert-St Louis
$842
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Mexico that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 7, 2025.
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

Wed 9/3

10:26 am-1:46 pm

Nonstop3h 20m

Cancun

Fri 9/5

2:49 pm-6:10 pm

Nonstop3h 21m

$243

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sat 9/13

10:21 am-1:34 pm

Nonstop3h 13m

Cancun

Sat 9/20

2:49 pm-6:10 pm

Nonstop3h 21m

$244

St. LouisPuerto Vallarta

STL - PVR

STLPVR

Lambert-St Louis

Wed 9/24

9:19 am-11:40 pm

2 stops15h 21m

Puerto Vallarta Ordaz

Tue 10/14

6:05 am-10:04 pm

2 stops14h 59m

$397

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

Wed 9/3

7:00 am-2:55 pm

2 stops9h 55m

San José del Cabo Los Cabos

Wed 9/10

6:01 am-7:07 pm

2 stops11h 06m

$417

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

Fri 9/19

7:16 am-11:33 am

1 stop6h 17m

San José del Cabo Los Cabos

Fri 9/26

11:30 am-8:15 pm

1 stop6h 45m

$420

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

Wed 9/3

5:17 am-9:10 am

1 stop5h 53m

San José del Cabo Los Cabos

Wed 9/10

1:13 pm-9:12 am

2 stops17h 59m

$422

St. LouisCozumel

STL - CZM

STLCZM

Lambert-St Louis

Tue 11/11

6:15 am-1:23 pm

1 stop7h 08m

Cozumel

Wed 11/19

2:25 pm-12:28 pm

2 stops22h 03m

$502

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

Fri 11/28

6:15 am-11:43 am

1 stop6h 28m

San José del Cabo Los Cabos

Sat 12/6

2:11 pm-9:58 pm

1 stop6h 47m

$513

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

Sun 9/7

5:35 am-1:10 pm

1 stop9h 35m

San José del Cabo Los Cabos

Sat 9/13

12:05 pm-8:45 pm

1 stop6h 40m

$521

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

Sat 1/17

8:55 am-12:20 pm

Nonstop4h 25m

San José del Cabo Los Cabos

Thu 1/22

12:00 pm-8:35 pm

1 stop7h 35m

$522

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Mexico from

How to get the cheapest flight ticket from St. Louis to Mexico

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Mexico?

If you’re not able to fly to Mexico in April, then August is your next best option. Flight prices from St. Louis to Mexico during August average around $474.

What is the cheapest day to depart on your flight to Mexico?

The cheapest day to depart on your flight to Mexico is on a Tuesday when prices can be found for as low as $472. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $548. These prices are subject to change though, so be sure to set up a Price Alert for flights to Mexico.

What is the cheapest time of day to depart on your flight to Mexico?

Our data shows that the cheapest St. Louis to Mexico flights are usually those with departure times in the evening. Our users have found flights to Mexico in the evening for as low as $367. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $864 on average. Flights to Mexico from St. Louis at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Lambert-St Louis to Mexico flight route?

Fly from Lambert-St Louis to Cancun for the best Lambert-St Louis - Mexico flight prices

How far in advance should I book a flight to Mexico?

You are more likely to see cheaper flights to Mexico from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Mexico for around $522 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Mexico from St. Louis for as low as $450 on momondo.

What cabin class options are available on Lambert-St Louis to Mexico flights?

There are 2 cabin classes available to choose from on Lambert-St Louis to Mexico flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap St. Louis to Mexico flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Mexico

Best Price Found

$113

Fastest flight time

3h 13m

Direct flights

Every day

Airports in Mexico

5 airports
The best one-way flight to Mexico from St. Louis in the past 72 hours is $113. The best round-trip flight deal from St. Louis to Mexico found on momondo in the last 72 hours is $243.
The fastest flight from St. Louis to Mexico takes 3h 13m
Direct flights go from St. Louis to Mexico every day.
There are 5 airports near Mexico: Cozumel (CZM), Santa Maria Huatulco (HUX), San José del Cabo Los Cabos (SJD), Cancun (CUN), Puerto Vallarta Ordaz (PVR)
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  • When did momondo last update prices for flights from Lambert-St Louis Airport to Mexico?

    Prices for flights from Lambert-St Louis Airport to Mexico are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Mexico?

  • How old do you have to be to fly from Lambert-St Louis Airport to Mexico?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Mexico.

  • What documentation or ID do you need to fly to Mexico?

    The travel and health documents you'll need for your trip to Mexico may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Mexico. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from St. Louis to Mexico?

Best airlines flying from St. Louis to Mexico

Compare and see reviews for airlines that fly from St. Louis to Mexico with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $132Free CancellationRating
6.3
8,055 reviews
Search Spirit Airlines flights
VolarisPriceFrom $174Free CancellationRating
6.6
1,163 reviews
Search Volaris flights
FrontierPriceFrom $276Free CancellationRating
5.8
3,231 reviews
Search Frontier flights
American AirlinesPriceFrom $306Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
AeromexicoPriceFrom $346Free CancellationRating
7.5
1,718 reviews
Search Aeromexico flights
DeltaPriceFrom $358Free CancellationRating
8.0
7,985 reviews
Search Delta flights
Alaska AirlinesPriceFrom $398Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $443Free CancellationRating
7.4
8,917 reviews
Search United Airlines flights
SouthwestPriceFrom $453Free CancellationRating
8.0
4,244 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Mexico?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Mexico from St. Louis.

Can I find flights from St. Louis to Mexico with flexible booking policies on momondo?

Yes. All flights to Mexico from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from St. Louis to Mexico?

momondo helps you find the best flight between St. Louis and Mexico by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from St. Louis to Mexico right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Mexico flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to Mexico

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Popular flights according to clicks in the last 7 days on momondo
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