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Flights from St. Louis to Cancun

Hi, I've summed up all the key info for St. Louis to Cancun flights

Cheapest one-way

US$ 196
Frontier Airlines Tue, Oct 27

45% below next 30d avg. (US$354)

Cheapest round-trip

US$ 454
Air Canada Sat, Oct 31

34% below next 30d avg. (US$689)

When to fly

October Cheapest month
July Peak month

Fastest flight

3h 9m Avg: 3h 5m

With a lowest one-way fare of US$196 , travelers can expect an average price of US$354 for upcoming trips, while round-trip tickets start at US$454 . Flights typically take around 3h 5m , but the fastest nonstop option completes the journey in just 3h 9m minutes. To secure the best rates, booking 40 days in advance is recommended, and the cheapest travel days are Tuesday, Wednesday, and Saturday .

Updated 2d ago · This content is an AI-powered summary based on Trip.com data. Prices and availability are subject to change. Please refer to actual prices, availability, and travel conditions.

Explore the cheapest one-way and round-trip flights from St. Louis to Cancun over the next 90 days, with one-way fares from US$196 and round-trip from US$454. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        STL 06:20
        3h 14m
        Nonstop
        CUN 09:34
        St. Louis - Cancun | Sat, Oct 31 | Frontier Airlines
        CUN 12:23
        3h 23m
        Nonstop
        STL 14:46
        Cancun - St. Louis | Sat, Nov 7 | Frontier Airlines
        US$534 US$620
        14% off
        14% off
        US$620 US$534
      • STL 06:30
        3h 9m
        Nonstop
        CUN 09:39
        St. Louis - Cancun | Tue, Oct 20 | Frontier Airlines
        CUN 11:08
        3h 17m
        Nonstop
        STL 14:25
        Cancun - St. Louis | Mon, Oct 26 | Frontier Airlines
        US$545 US$620
        12% off
        12% off
        US$620 US$545
      • STL 16:05
        19h 50m
        1 stop
        CUN 11:55
        St. Louis - Cancun | Sat, Oct 31 | Air Canada
        CUN 21:30
        18h 56m
        1 stop
        STL 15:26
        Cancun - St. Louis | Sat, Nov 7 | Air Canada
        US$454 US$620
        27% off
        27% off
        US$620 US$454
      • STL 14:40
        29h 30m
        1 stop
        CUN 20:10
        St. Louis - Cancun | Tue, Oct 20 | Air Canada
        CUN 09:55
        7h 3m
        1 stop
        STL 16:58
        Cancun - St. Louis | Mon, Oct 26 | Frontier Airlines
        US$455
        27% off
        US$620 US$455
      • STL 19:10
        14h 47m
        1 stop
        CUN 09:57
        St. Louis - Cancun | Tue, Oct 20 | American Airlines
        CUN 10:59
        7h 21m
        1 stop
        STL 18:20
        Cancun - St. Louis | Mon, Oct 26 | American Airlines
        US$456
        26% off
        US$620 US$456
      • STL 07:00
        12h 55m
        1 stop
        CUN 19:55
        St. Louis - Cancun | Sat, Oct 31 | Aeromexico
        CUN 15:25
        7h 34m
        1 stop
        STL 21:59
        Cancun - St. Louis | Sat, Nov 7 | Aeromexico
        US$459
        26% off
        US$620 US$459
      • STL 08:48
        11h 13m
        1 stop
        CUN 20:01
        St. Louis - Cancun | Wed, Oct 14 | American Airlines
        CUN 15:31
        8h 28m
        1 stop
        STL 23:59
        Cancun - St. Louis | Sat, Oct 17 | American Airlines
        US$467
        25% off
        US$620 US$467
      • STL 14:40
        19h 10m
        1 stop
        CUN 09:50
        St. Louis - Cancun | Tue, Sep 29 | Air Canada
        CUN 21:05
        23h 15m
        1 stop
        STL 20:20
        Cancun - St. Louis | Sun, Oct 4 | Air Canada
        US$476
        23% off
        US$620 US$476
      • STL 08:55
        24h 55m
        1 stop
        CUN 09:50
        St. Louis - Cancun | Wed, Oct 21 | Air Canada
        CUN 21:05
        18h 21m
        1 stop
        STL 15:26
        Cancun - St. Louis | Tue, Oct 27 | Air Canada
        US$476
        23% off
        US$620 US$476
      • STL 12:00
        7h 55m
        1 stop
        CUN 19:55
        St. Louis - Cancun | Sat, Oct 31 | Delta Air Lines
        CUN 21:30
        18h 56m
        1 stop
        STL 15:26
        Cancun - St. Louis | Sat, Nov 7 | Air Canada
        US$481
        22% off
        US$620 US$481
      • STL 08:55
        11h 15m
        1 stop
        CUN 20:10
        St. Louis - Cancun | Mon, Sep 14 | Air Canada
        CUN 21:05
        16h 55m
        1 stop
        STL 14:00
        Cancun - St. Louis | Thu, Sep 17 | Air Canada
        US$483
        22% off
        US$620 US$483
      • STL 06:13
        6h 51m
        1 stop
        CUN 13:04
        St. Louis - Cancun | Sat, Oct 31 | American Airlines
        CUN 07:00
        6h 28m
        1 stop
        STL 12:28
        Cancun - St. Louis | Sat, Nov 7 | American Airlines
        US$490
        21% off
        US$620 US$490
      • STL 13:00
        17h 25m
        1 stop
        CUN 14:00
        St. Louis - Cancun | Sun, Sep 13 | Normal Airline
        CUN 15:00
        6h
        Nonstop
        STL 16:00
        Cancun - St. Louis | Tue, Sep 15 | Normal Airline
        More cheap flights
        More cheap flights
      • Cheapest nonstop
        STL 06:20
        3h 14m
        Nonstop
        CUN 09:34
        St. Louis - Cancun | Tue, Oct 27 | Frontier Airlines
        US$196 US$545
        64% off
        64% off
        US$545 US$196
      • STL 06:30
        3h 9m
        Nonstop
        CUN 09:39
        St. Louis - Cancun | Mon, Oct 26 | Frontier Airlines
        US$196 US$545
        64% off
        64% off
        US$545 US$196
      • STL 06:30
        3h 9m
        Nonstop
        CUN 09:39
        St. Louis - Cancun | Tue, Oct 13 | Frontier Airlines
        US$207 US$545
        62% off
        62% off
        US$545 US$207
      • STL 06:30
        3h 9m
        Nonstop
        CUN 09:39
        St. Louis - Cancun | Tue, Oct 20 | Frontier Airlines
        US$208
        62% off
        US$545 US$208
      • STL 06:00
        5h 30m
        1 stop
        CUN 12:30
        St. Louis - Cancun | Mon, Nov 9 | Aeromexico
        US$225
        59% off
        US$545 US$225
      • STL 06:15
        6h 41m
        1 stop
        CUN 12:56
        St. Louis - Cancun | Mon, Sep 28 | Aeromexico
        US$228
        57% off
        US$545 US$228
      • STL 10:14
        9h 41m
        1 stop
        CUN 19:55
        St. Louis - Cancun | Mon, Oct 26 | Aeromexico
        US$234
        56% off
        US$545 US$234
      • STL 06:00
        13h 55m
        1 stop
        CUN 19:55
        St. Louis - Cancun | Tue, Oct 13 | Aeromexico
        US$235
        56% off
        US$545 US$235
      • STL 06:32
        13h 29m
        1 stop
        CUN 20:01
        St. Louis - Cancun | Sun, Oct 11 | American Airlines
        US$315
        42% off
        US$545 US$315
      • STL 07:00
        12h 55m
        1 stop
        CUN 19:55
        St. Louis - Cancun | Wed, Oct 14 | Aeromexico
        US$479
        12% off
        US$545 US$479
      • STL 13:00
        17h 25m
        1 stop
        CUN 14:00
        St. Louis - Cancun | Sun, Sep 13 | Normal Airline
        More cheap flights
        More cheap flights

Flight.News
Flights from St. Louis to Cancun operate an average of 1 times per day over the past 7 days, with a 20.0% on-time departure rate and a 75.0% on-time arrival rate.

St. Louis to Cancun Flight Information

The distance between St. Louis and Cancun is about 1,980.25 km. The average flying time from St. Louis to Cancun is around 3 hours 5 minutes. Based on Trip.com's latest data, travel demand is highest in July. The off-season for travel is October.

Cheapest one-way flight price US$196
Cheapest return ticket price US$454
Cheapest month October
Peak season for travel July
Flight distance 1,980.25 km
Average flight time 3 hours 5 minutes
Frequency ～4/week
Flight statistics for the St. Louis–Cancun route are based on aggregated booking data from Trip.com over the past 12 months.

Frequently Asked Questions

  • What are the cheapest flights from St. Louis to Cancun (STL-CUN)?

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as US$196 on Cheapest nonstop routes (e.g. STL to CUN on Tue, Oct 27), while Air Canada offers Cheapest nonstop round-trips from US$454 departing on Sat, Oct 31 and returning on Sat, Nov 7.
  • It takes about 3 hours 5 minutes to fly from St. Louis to Cancun.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from St. Louis to Cancun is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from St. Louis to Cancun, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Oct 27, with one-way flights priced at just US$196.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Cancun travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from St. Louis to Cancun is October, when demand for travel is lower.
  • After crunching the numbers on our September flight calendar, it's currently cheapest to fly from St. Louis to Cancun on September 13, 2026 with Aeromexico, with prices starting at US$430.
  • The time difference between Cancun and St. Louis is 1h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.
  • Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from St. Louis to Cancun is US$354. Fares vary by travel date, airline and availability.
  • Based on Trip.com data for travel in the next 30 days, the average round-trip fare from St. Louis to Cancun is US$689. The final price depends on the outbound and return dates, airline and fare conditions.
  • Enter St. Louis and Cancun, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

Trip.com Airline Insights on Flights from St. Louis to Cancun

Which airline offers the cheapest direct flights from St. Louis to Cancun?

Data is based on the average price of all nonstop flights from St. Louis to Cancun on Trip.com over the past 12 months.

Based on Trip.com’s data from the past 12 months, Air Canada provides the lowest-priced direct flights from St. Louis to Cancun, with fares starting at US$176.

US$90
US$176
US$263
US$349
US$435
Air Canada
US$176
Air Canada
Frontier Airlines
US$245
Frontier Airlines
Aeromexico
US$269
Aeromexico
Volaris
US$435
Volaris

Which airline operates the most flights from St. Louis to Cancun?

Total flights from St. Louis to Cancun across all airlines. (Based on Trip.com data from the past month)

Based on Trip.com’s data from the past month, Frontier Airlines/Volaris operates the most frequent flights from St. Louis to Cancun, with 3 flights per week.

3
Frontier Airlines
3
Frontier Airlines
Volaris
3
Volaris

How many flights fly from St. Louis to Cancun daily?

The data is based on the flight numbers for each day of the week from St. Louis to Cancun within the Trip.com database over the past month.

Based on the past month's historical data from Trip.com, the number of flights from St. Louis to Cancun is the highest on Friday/Saturday and the lowest on Tuesday/Wednesday.

9
6
2
0
Highest
8
Mon
2
Tue
2
Wed
6
Thu
9
Fri
9
Sat
7
Sun

Explore More Popular Flights

Note: Prices shown on this page are the estimated lowest prices found in the last 24 hours and include all taxes and fees.

Book with no extra fees

Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.