JetSaver
JetSaver
  • FlightsFlights
  • HotelsHotels
  • CarsCars
  • VacationsVacations
USDUSD
JetSaverclose
Economy

From
Select place
To
Select place

Travelers

Economy

USDUSD
  • FlightsFlights
  • HotelsHotels
  • CarsCars
  • VacationsVacations
  • ExploreExplore
  • BlogsBlogs
  • My BookingMy Booking
  • Help CenterHelp Center
    • Group BookingsGroup Bookings
    • JetSavers™Club
    • JetRewards™

Company

About JetSaverJob/CareersNeed Help

Explore

Flight SearchHotel SearchCar SearchBlogs

JetSaver

Explore All

Partners

Our TechnologyAPIBecome a patner

What is JetSaver?

Discover the world effortlessly with JetSaver – your go-to for seamless flight and travel exploration. More than just a meta search engine, we're your dedicated travel companion, ensuring an unmatched user experience and exceptional customer service.

Become a Partner?
Expanding Travel Horizons Together
Partner with us
Cookie PolicyPrivacy PolicyTerms of ServiceCompany Details
ASTAARC
pay with visa cardpay with master card pay with american express SSL Secure ConnectionAffirmAmadeusAzure
© 2025 JetSaver, All rights reserved. v3.0.0
FacebookLinkedInTwitterInstagram
Logos and trademarks of respective airlines and travel agencies do not necessarily indicate our affiliation with them. We search and aggregate prices available on the web, through GDS platforms, and via direct and agreed integration with travel agencies. Our proprietary algorithm sorts prices to display the best available options.
heroPage

$135 Frontier Airlines St Louis to Denver Cheap Flight Tickets

FlightsHotelsCarsVacations
Economy

From
Select place
To
Select place

Travelers

Economy

  1. Home
  2. Cheap Flights
  3. St Louis to Denver flights

Book St Louis to Denver Frontier Airlines Cheap Flight Deals

Flying from St Louis to Denver, Frontier Airlines is the best airline to fly. Whether it's to visit your home, vacation or business, Frontier Airlines St Louis to Denver flights are the best way to reach your destination. JetSaver offers St Louis to Denver Frontier Airlines flight deals to book your air tickets with savings. You can check Frontier flights from St Louis to Denver Cheap flight ticket prices from 100+ airline and travel agencies before you book your Frontier Airlines St Louis to Denver tickets. 

St Louis to Denver flights
6/6 Fri
Frontier Airlines
Non Stop
STL - DEN
18:55 - 20:26
Denver to St Louis flights
6/14 Sat
Frontier Airlines
Non Stop
DEN - STL
06:00 - 09:12
$135
St Louis to Denver flights
5/22 Thu
Frontier Airlines
1 stop
STL - DEN
21:49 - 04:01
Denver to St Louis flights
5/24 Sat
Frontier Airlines
Non Stop
DEN - STL
06:00 - 09:12
$399

JetSaver brings the Frontier Airlines St Louis to Denver. Cheap flight deals to save more on your trip. Search St Louis to Denver flights by selecting Frontier Airlines and book your plane tickets by selecting from our trusted partners. Not only Frontier Airlines St Louis to Denver Cheapest flights but also you can check out St Louis to Denver Frontier Airlines STL to DEN flights schedules, price history Frontier Airlines flights from St Louis to Denver and baggage, check in information on the Frontier flights from St Louis to Denver.

Frontier Airlines Cheap Flights from St Louis to Denver

Flights between St Louis to Denver are frequent, with multiple direct and connecting options available. Frontier Airlines STL to DEN Flight Deals offer an excellent balance of affordability and comfort. The Frontier Airlines STL to DEN route is a popular choice among travelers, with top-tier in-flight services and convenient flight schedules.

  • Departure Airport: STL 
  • Arrival Airport: DEN
  • Flight duration from St Louis to Denver is 02:31 hours
  • The cheapest airfare to reach from St Louis to Denver is $135
  • Visa Requirements: Not required, as this is a domestic flight within the USA

Frontier Airlines St Louis to Denver Flight Schedules

When flying from Frontier flights from St Louis to Denver, it is suggested to check the Airline flight schedule and pick the right flight that suits your travel.  Below Frontier Airlines St Louis to Denver Flight Schedule for your reference though flight schedules can vary depending on the weather and airline policies. Frontier Airlines Schedule for St Louis to Denver flights includes both direct and connecting flights.

Why Choose JetSaver for Frontier Airlines STL to DEN Flight Booking?

Convenient Flight Options

Frontier Airlines operates multiple flights between St Louis to Denver daily. By booking through JetSaver, you can compare Frontier Airlines flights based on your schedule and budget. Check the Frontier STL to DEN flight deals to find the most affordable options and secure your tickets at the best prices.

Budget-Friendly Prices

JetSaver makes it easy to find the cheapest Frontier Airlines flight between St Louis to Denver. Take advantage of exclusive discounts and special offers on Frontier Flights from St Louis to Denver. to save more on your travel expenses. Booking your flight with JetSaver ensures that you get top deals without compromising on quality.

Comfort and Ease

Frontier Airlines is known for its exceptional service and in-flight comfort. Whether you’re flying for business or leisure, Frontier Airlines DEN to St Louis flights provide a seamless travel experience. From extra legroom to in-flight entertainment, Frontier Airlines ensures a comfortable journey.

Book Your Frontier Airlines Flights from St Louis to Denver with JetSaver

Searching for the best Frontier flights from St Louis to Denver? With JetSaver, you can compare fares, check availability, and secure your flight tickets at unbeatable prices. Whether you're flying one-way or round-trip, JetSaver helps you book your Denver to St Louis on Frontier Airlines with ease.

Frontier Airlines St Louis to Denver Flight Ticket Prices

Finding the cheapest fare for Frontier Airlines St Louis to Denver Flights is now easy with JetSaver. We compare prices from our trusted online travel partners and show you the cheapest Airline St Louis to Denver flight price for your trip. Not only saving money, but JetSaver helps you in getting the Frontier Airlines St Louis to Denver Flight Tickets with best options like less travel time and in budget prices.

St Louis to Denver Frontier Airlines Flights Alternatives

Along with Frontier Airlines, some of the popular airlines are available to fly from St Louis to Denver. Below is the list of airlines which fly from St Louis to Denver other than Frontier Airlines.

AirlineFrequency of Direct FlightsDeparture Terminal at STLArrival Terminal at DEN
Delta Air Lines2-3 daily flightsTerminal ATerminal 2
Spirit Airlines3-4 daily flightsTerminal BTerminal 4
American AirlinesDaily flightsTerminal BTerminal 3
United AirlinesVariesTerminal BTerminal 1

Frontier Airlines Baggage Allowance & Fees

The luggage allowance on Frontier Airlines includes:

Personal Item: One free personal item (up to 14 x 18 x 8 inches), such as a tiny backpack, laptop bag, or pocketbook, is allowed.

Carry-On Bag: Additional fees apply for carry-on, and up to 10 x 16 x 24 inches (with wheels and handles) is the maximum size allowed.

Checked Bags: 62 inches (length plus width plus height) and a standard weight limit of 50 pounds are available for an extra charge.

There is an additional fee for Oversized or overweight luggage.

Baggage TypeAllowanceFees (May Vary)Notes
Carry-On10" x 16" x 24" (max 35 lbs) 
Personal Item: 8" x 18" x 14"
Included with some fares, otherwise fees apply.Must fit in overhead bin or under seat.
Checked Bag62 linear inches (max 40 lbs)Fees apply per bag.Overweight/oversized bags incur extra charges.
Excess BaggageOverweight/oversized bagsSignificant fees apply.Weight limits and size restrictions apply.
Special ItemsSports equipment, musical instruments, etc.Fees may apply, and size/weight restrictions vary.Check Frontier's website for specific rules.
Prohibited ItemsFirearms, explosives, flammable liquids, etc.Not permitted in carry-on or checked baggage.See TSA website and Frontier's website for complete list.

Frequently asked questions on Frontier Airlines from St Louis to Denver

1. Does Frontier Airlines offer direct flights from St Louis to Denver?

Yes, Frontier Airlines offers direct flights from St Louis to Denver. You can check Frontier Airlines flight schedules from St Louis to Denver. To find non-stop flights, we recommend choosing Frontier Airlines St Louis to Denver direct flights for faster and time-saving journeys.

2. How to get Cheap Frontier Airlines St Louis to Denver flights?

Use JetSaver search, enter your St Louis, Denver, and travel dates to choose the cheapest flight deals for your trip.

3. Which airlines offer flights from St Louis STL to Denver DEN?

Several airlines operate flights from St Louis STL to Denver DEN, including Frontier Airlines St Louis to Denver, Delta, Spirit and American Airlines. Frontier Airlines often offers nonstop options with great service. To check airlines for the best deals.

4. How many Frontier Airlines flights are operating between St Louis to Denver?

Check out the Frontier Airlines St Louis to Denver flight schedules, as the number of flights can vary based on the travel dates and days.

5. How to cancel or reschedule Frontier Airlines St Louis to Denver flights?

After completing the booking of Frontier Airlines St Louis to Denver flights, you have to contact the online travel agency through which you completed your Frontier Airlines St Louis to Denver flight booking to make date changes or cancellations.

6. When is the best time to book Frontier Airlines St Louis to Denver flights?

It is always suggested to book at least 2 weeks before your travel dates to get cheap Frontier Airlines St Louis to Denver flights. If it is last-minute Frontier Airlines St Louis to Denver flight booking, use JetSaver to find the best deals to save more on your trip.

7. What are the Frontier Airlines St Louis to Denver flight ticket prices?

Flight ticket prices of Frontier Airlines St Louis to Denver flights depend on the journey dates and cabin class you are choosing.

8. What are the best ways to find cheap flights from Frontier Airlines St Louis to Denver?

Booking early, comparing flight prices on different platforms, and keeping an eye out for special deals and discounts can help you find the best cheap flight options.

9. Can I change or cancel my Frontier Airlines St Louis to Denver?

Yes, you can change or cancel your Frontier Airlines St Louis to Denver flight, but fees may apply based on your fare type. Check Frontier Airlines website for specific policies. Flexible fares usually allow free changes or cancellations.

10. What is the cheapest day to fly from Frontier Airlines STL to DEN?

The cheapest days to travel Frontier Airlines St Louis to Denver are typically midweek, such as Tuesday or Wednesday. Planning early Traveling during off-peak hours can often lead to lower prices. Check fare calendars to find the greatest prices.

11. How long is a Frontier Airlines flight from STL to DEN?

A Frontier Airlines trip from STL to DEN takes around 02:31, hours based on factors such as weather and layover. Check with the airline for actual flight times or dates.

12. Which airlines provide the cheapest flights from St Louis to Denver?

The cost of flights from St Louis to Denver varies based on demand and season, booking time, but budget airlines like Frontier Airlines often offer the lowest fares, starting from $135. To get the best prices, book earlier in time and compare fares.

Popular Frontier Airlines flight options to Denver

  • Frontier Airlines Flights from Newark to Denver
  • Frontier Airlines Flights from New York City to Denver
  • Frontier Airlines Flights from Los Angeles to Denver
  • Frontier Airlines Flights from Chicago to Denver
  • Frontier Airlines Flights from San Francisco to Denver
  • Frontier Airlines Flights from Boston to Denver
  • Frontier Airlines Flights from Washington Dulles to Denver
  • Frontier Airlines Flights from Dallas to Denver
  • Frontier Airlines Flights from Miami to Denver
  • Frontier Airlines Flights from Atlanta to Denver
  • Frontier Airlines Flights from Philadelphia to Denver
  • Frontier Airlines Flights from Seattle to Denver
  • Frontier Airlines Flights from Houston to Denver
  • Frontier Airlines Flights from Orlando to Denver
  • Frontier Airlines Flights from Denver to Denver
  • Frontier Airlines Flights from Detroit to Denver
  • Frontier Airlines Flights from Minneapolis to Denver
  • Frontier Airlines Flights from Charlotte to Denver
  • Frontier Airlines Flights from Phoenix to Denver
  • Frontier Airlines Flights from Las Vegas to Denver

Popular Frontier Airlines flight options from Denver

  • Frontier Airlines Flights from Denver to New York
  • Frontier Airlines Flights from Denver to Los Angeles
  • Frontier Airlines Flights from Denver to Chicago
  • Frontier Airlines Flights from Denver to Houston
  • Frontier Airlines Flights from Denver to Phoenix
  • Frontier Airlines Flights from Denver to Philadelphia
  • Frontier Airlines Flights from Denver to San Diego
  • Frontier Airlines Flights from Denver to Dallas
  • Frontier Airlines Flights from Denver to Austin
  • Frontier Airlines Flights from Denver to Jacksonville
  • Frontier Airlines Flights from Denver to Charlotte
  • Frontier Airlines Flights from Denver to Indianapolis
  • Frontier Airlines Flights from Denver to San Francisco
  • Frontier Airlines Flights from Denver to Seattle
  • Frontier Airlines Flights from Denver to Denver
  • Frontier Airlines Flights from Denver to Boston
  • Frontier Airlines Flights from Denver to Nashville
  • Frontier Airlines Flights from Denver to Portland
  • Frontier Airlines Flights from Denver to Las Vegas
  • Frontier Airlines Flights from Denver to Baltimore

Popular Airlines from St. Louis to Denver

  • Alaska Airlines Flights from St Louis to Denver
  • United Airlines Flights from St Louis to Denver
  • American Airlines Flights from St Louis to Denver
  • Southwest Airlines Flights from St Louis to Denver

Popular routes from St. Louis

  • St Louis to Cancun flights
  • St Louis to Las Vegas flights
  • St Louis to Dallas flights
  • St Louis to Miami flights
  • St Louis to Amsterdam flights
  • St Louis to New Orleans flights
  • St Louis to Punta Cana flights
  • St Louis to Phoenix flights
  • St Louis to Orlando flights
  • St Louis to Boston flights
  • St Louis to Ljubljana flights

Popular routes to Denver

  • Phoenix to Denver flights
  • Tampa to Denver flights
  • Los Angeles to Denver flights
  • Minneapolis to Denver flights
  • Las Vegas to Denver flights
  • San Francisco to Denver flights
  • Ontario to Denver flights
  • Atlanta to Denver flights
  • Seattle to Denver flights
  • Austin to Denver flights
  • Orlando to Denver flights
  • Dallas to Denver flights

Explore More Cities

  • Flights to Amsterdam
  • Flights to Atlanta
  • Flights to Austin
  • Flights to Boston
  • Flights to Cancun
  • Flights to Dallas
  • Flights to Las Vegas
  • Flights to Los Angeles
  • Flights to Ljubljana
  • Flights to Miami

Explore More Airlines

  • American Airlines booking
  • Alaska Airlines booking
  • United Airlines booking
  • Frontier Airlines booking
  • Southwest Airlines booking
Popular Destinations
Popular Destinations For You

Popular Airlines

Popular Cities

Popular Countries

Popular Flight Routes

Popular Airlines Routes

Spirit Airlines bookingAllegiant Airlines bookingViva Aerobus bookingAir Canada bookingSun Country Airlines bookingAero Mexico Airlines bookingAir India bookingWestJet Airlines bookingEmirates Airlines bookingVolaris Airlines bookingAvianca Airlines bookingEtihad Airways bookingLATAM Airlines bookingBritish Airways bookingNorse Atlantic bookingeasyJet bookingAmerican Airlines bookingUnited Airlines bookingDelta Air Lines bookingJetBlue booking
Flights to New YorkFlights to Los AngelesFlights to ChicagoFlights to MiamiFlights to Las VegasFlights to OrlandoFlights to AtlantaFlights to San FranciscoFlights to Washington DCFlights to BostonFlights to DallasFlights to SeattleFlights to ParisFlights to DenverFlights to TorontoFlights to IstanbulFlights to MilanFlights to LondonFlights to CancunFlights to Mexico City
Flights to FranceFlights to SpainFlights to CroatiaFlights to TurkeyFlights to ItalyFlights to MexicoFlights to United KingdomFlights to GermanyFlights to CanadaFlights to USAFlights to Hong KongFlights to JapanFlights to South KoreaFlights to IndonesiaFlights to ChinaFlights to IndiaFlights to MalaysiaFlights to ThailandFlights to VietnamFlights to Macao
Los Angeles to Las Vegas flightsAtlanta to Fort Lauderdale flightsSeattle to Miami flightsBaltimore to Fort Lauderdale flightsSan Francisco to Las Vegas flightsDallas to Los Angeles flightsDallas to Las Vegas flightsBoston to Cancun flightsDenver to Baltimore flightsFort Lauderdale to Atlanta flightsTampa to Seattle flightsSeattle to Las Vegas flightsFort Lauderdale to Seattle flightsBaltimore to Atlanta flightsDenver to Las Vegas flightsAtlanta to Los Angeles flightsFort Lauderdale to Punta Cana flightsAtlanta to Punta Cana flightsLos Angeles to Dallas flightsBaltimore to Los Angeles flights
Spirit Airlines Los Angeles to Las Vegas flightsSpirit Airlines Atlanta to Fort Lauderdale flightsSpirit Airlines Dallas To Los Angeles flightsSpirit Airlines Oakland To Las Vegas flightsJetblue Airways New York to Los Angeles flightsJetblue Airways Boston to Fort Lauderdale flightsJetblue Airways New York to San Francisco flightsJetblue Airways Boston to Las Vegas flightsAir India Airlines New York to Delhi flightsAir India Airlines San Francisco to Bangalore flightsAir India Airlines Chicago to Delhi flightsAir India Airlines Newark to Mumbai flightsFrontier Airlines Denver to Las Vegas flightsFrontier Airlines Miami to Atlanta flightsFrontier Airlines Denver to Phoenix flightsFrontier Airlines Las Vegas to San Francisco flightsWestjet Airlines Los Angeles to Cancun flightsWestjet Airlines Las Vegas to Puerto Vallarta flightsWestjet Airlines San Diego to Mexico City flightsWestjet Airlines Denver to Cancun City flights