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Cheap flights from St. Louis to Mexico from $127

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 10/29. 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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0 bags

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Find the cheapest flights from St. Louis to Mexico

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
11:17 am - 2:30 pmSTL-CUN
3h 13mnonstop
Frontier Logo
3:45 pm - 6:00 pmCUN-STL
3h 15mnonstop
$277Frontier
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Wed, Oct 29 - Sat, Nov 8
Frontier Logo
10:17 am - 2:30 pmSTL-CUN
3h 13mnonstop
Frontier Logo
3:45 pm - 6:00 pmCUN-STL
3h 15mnonstop
$281Frontier
Find Deal
Tue, Nov 4 - Fri, Nov 7
Frontier Logo
10:17 am - 2:30 pmSTL-CUN
3h 13mnonstop
Frontier Logo
3:45 pm - 6:00 pmCUN-STL
3h 15mnonstop
$289Frontier
Find Deal
Mon, Nov 10 - Fri, Nov 14
Volaris Logo
10:17 am - 2:30 pmSTL-CUN
3h 13mnonstop
Volaris Logo
3:45 pm - 6:00 pmCUN-STL
3h 15mnonstop
$365Volaris
Find Deal
Sun, Nov 9 - Thu, Nov 13
Volaris Logo
11:17 am - 2:30 pmSTL-CUN
3h 13mnonstop
Volaris Logo
3:45 pm - 6:00 pmCUN-STL
3h 15mnonstop
$370Volaris
Find Deal
Sat, Nov 1 - Tue, Nov 4
American Airlines Logo
5:09 pm - 11:03 amSTL-CUN
17h 54m1 stop
American Airlines Logo
1:10 pm - 10:27 pmCUN-STL
10h 17m1 stop
$382American Airlines
Find Deal
Sat, Nov 1 - Tue, Nov 4
American Airlines Logo
5:17 am - 1:36 pmSTL-SJD
9h 19m1 stop
American Airlines Logo
4:23 pm - 11:51 pmSJD-STL
6h 28m1 stop
$436American Airlines
Find Deal
Tue, Nov 4 - Tue, Nov 11
United Airlines Logo
5:24 pm - 10:47 amSTL-PVR
18h 23m2 stops
United Airlines Logo
3:40 pm - 10:22 pmPVR-STL
6h 42m1 stop
$458United Airlines
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Sat, Nov 1 - Sat, Nov 8
United Airlines Logo
6:43 pm - 1:02 pmSTL-PVR
18h 19m2 stops
United Airlines Logo
3:40 pm - 9:58 pmPVR-STL
6h 18m1 stop
$491United Airlines
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Fri, Nov 28 - Fri, Dec 5
Southwest Logo
5:55 am - 2:50 pmSTL-SJD
9h 55m1 stop
Southwest Logo
11:40 am - 4:15 pmSJD-STL
3h 35mnonstop
$588Southwest
Find Deal
Sun, Nov 30 - Sat, Dec 6

Volaris flights from St. Louis to Mexico

Our best Volaris deals on St. Louis to Mexico flight tickets
Volaris
Nov 9
STL10:17 amLambert-St Louis
3h 13m
CUN2:30 pmCancun
Nov 13
CUN3:45 pmCancun
3h 15m
STL6:00 pmLambert-St Louis
$365
Find similar
Volaris
Nov 1
STL11:17 amLambert-St Louis
3h 13m
CUN2:30 pmCancun
Nov 4
CUN3:45 pmCancun
3h 15m
STL6:00 pmLambert-St Louis
$370
Find similar
Volaris
Oct 22
STL10:22 amLambert-St Louis
3h 13m
CUN1:35 pmCancun
Oct 26
CUN4:14 pmCancun
16h 53m
1 stop
STL9:07 amLambert-St Louis
$406
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Aeromexico flights from St. Louis to Mexico

Our best Aeromexico deals on St. Louis to Mexico flight tickets
Aeromexico
Jan 21
STL6:00 amLambert-St Louis
8h 00m
1 stop
CZM2:00 pmCozumel
Jan 28
CZM3:15 pmCozumel
8h 25m
1 stop
STL11:40 pmLambert-St Louis
$441
Find similar
Aeromexico
Nov 28
STL6:00 amLambert-St Louis
7h 10m
1 stop
SJD12:10 pmSan José del Cabo Los Cabos
Dec 5
SJD1:15 pmSan José del Cabo Los Cabos
9h 25m
1 stop
STL11:40 pmLambert-St Louis
$457
Find similar
Aeromexico
Apr 7
STL7:30 amLambert-St Louis
15h 58m
2 stops
QRO10:28 pmSantiago de Querétaro
Apr 8
QRO12:18 pmSantiago de Querétaro
10h 22m
2 stops
STL11:40 pmLambert-St Louis
$482
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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 October 14, 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 10/29

11:17 am-2:30 pm

Nonstop3h 13m

Cancun

Sat 11/8

3:45 pm-6:00 pm

Nonstop3h 15m

$277

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 11/4

10:17 am-2:30 pm

Nonstop3h 13m

Cancun

Fri 11/7

3:45 pm-6:00 pm

Nonstop3h 15m

$281

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 11/10

10:17 am-2:30 pm

Nonstop3h 13m

Cancun

Fri 11/14

3:45 pm-6:00 pm

Nonstop3h 15m

$289

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 11/9

10:17 am-2:30 pm

Nonstop3h 13m

Cancun

Thu 11/13

3:45 pm-6:00 pm

Nonstop3h 15m

$365

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sat 11/1

11:17 am-2:30 pm

Nonstop3h 13m

Cancun

Tue 11/4

3:45 pm-6:00 pm

Nonstop3h 15m

$370

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sat 11/1

5:09 pm-11:03 am

1 stop17h 54m

Cancun

Tue 11/4

1:10 pm-10:27 pm

1 stop10h 17m

$382

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

Tue 11/4

5:17 am-1:36 pm

1 stop9h 19m

San José del Cabo Los Cabos

Tue 11/11

4:23 pm-11:51 pm

1 stop6h 28m

$436

St. LouisPuerto Vallarta

STL - PVR

STLPVR

Lambert-St Louis

Sat 11/1

5:24 pm-10:47 am

2 stops18h 23m

Puerto Vallarta Ordaz

Sat 11/8

3:40 pm-10:22 pm

1 stop6h 42m

$458

St. LouisPuerto Vallarta

STL - PVR

STLPVR

Lambert-St Louis

Fri 11/28

6:43 pm-1:02 pm

2 stops18h 19m

Puerto Vallarta Ordaz

Fri 12/5

3:40 pm-9:58 pm

1 stop6h 18m

$491

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

Sun 11/30

5:55 am-2:50 pm

1 stop9h 55m

San José del Cabo Los Cabos

Sat 12/6

11:40 am-4:15 pm

Nonstop3h 35m

$588

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 September, then October is your next best option. Flight prices from St. Louis to Mexico during October average around $432.

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 Wednesday when prices can be found for as low as $417. 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 $540. 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 $831 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 $495 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 $396 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.

Can stopping save me money on St. Louis to Mexico flights?

You could potentially save up to 1% on your flight if you consider stops on a St. Louis to Mexico flight.

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

$194

Fastest flight time

3h 13m

Direct flights

Every day

Airports in Mexico

1 airport
The best one-way flight to Mexico from St. Louis in the past 72 hours is $194. The best round-trip flight deal from St. Louis to Mexico found on momondo in the last 72 hours is $332.
The fastest flight from St. Louis to Mexico takes 3h 13m
Direct flights go from St. Louis to Mexico every day.
There is 1 airport near Mexico: Cancun (CUN)
Search flight deals

  • 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 $130Free CancellationRating
6.3
8,096 reviews
Search Spirit Airlines flights
VolarisPriceFrom $175Free CancellationRating
6.7
1,150 reviews
Search Volaris flights
DeltaPriceFrom $218Free CancellationRating
7.9
7,975 reviews
Search Delta flights
FrontierPriceFrom $246Free CancellationRating
5.8
3,135 reviews
Search Frontier flights
AeromexicoPriceFrom $247Free CancellationRating
7.4
1,684 reviews
Search Aeromexico flights
American AirlinesPriceFrom $306Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights
United AirlinesPriceFrom $382Free CancellationRating
7.4
8,976 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $385Free CancellationRating
8.0
11,079 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $453Free CancellationRating
8.0
4,238 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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