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Cheap Flights from Denver to Saint Louis (STL)
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Adults 18+
Children 2-11
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Average price per month
- Low Season: March
- High Season: November
- Prices for this route are volatile and fluctuate from month to month.
- The cheapest flights are usually bought in March, January and October.
- High season months are December, June and November. However, it's not the rule and you should always search current flight deals.
Price increase as travel date approaches
- Flight prices for this route increase by 49% if you book last minute. Hover on the graph above to see for yourself!.
- To grab the lowest price possible, you should buy your flight around 33 days before departure!
- Consider booking at least 12 days before departure to increase your chances of getting a low price.
- Generally, it's safe to book between 90 and 60 days in advance.
Denver to Saint Louis Flight Information
| Flights Depart From | Denver (DEN) |
| Flights Arriving To | Saint Louis (STL) |
| Distance | 1235.07 km |
| Current Price | $146.97 |
| Good Deal | $152.64 |
| Cheapest Airlines | Frontier Airlines, American Airlines, Delta Air Lines |
| Popular Airlines | Delta Air Lines, American Airlines, Frontier Airlines |
| Flight Duration | 01 hours 52 minutes |
| Flights Depart From |
| Denver (DEN) |
| Flights Arrive In |
| Saint Louis (STL) |
| Distance |
| 1235.07 km |
| Flight Duration |
| 01 hours 52 minutes |
| Current Price |
| $146.97 |
| Good Deal |
| $152.64 |
| Cheapest Airlines |
| Frontier Airlines, American Airlines, Delta Air Lines |
| Popular Airlines |
| Delta Air Lines, American Airlines, Frontier Airlines |
Most Reliable Airlines flying to Saint Louis
- According to our data, Delta Air Lines, American Airlines and Frontier Airlines have the highest overall rating.
- The following airlines have the highest chance of on time arrivals: Delta Air Lines, American Airlines and Frontier Airlines.
- If customer service is important for you then you should consider flying with Delta Air Lines, American Airlines and Frontier Airlines.
| Airline | Overall Rating | On time arrival | Check-in & Boarding | Cleanliness | Customer Service | Food & Beverage | Entertainment | Legroom | Seat Comfort |
|---|---|---|---|---|---|---|---|---|---|
Delta Air Lines |
3.8 | 4.5 | 4.0 | 4.0 | 4.0 | 3.5 | 4.0 | 3.5 | 3.5 |
American Airlines |
3.3 | 4.0 | 3.5 | 3.5 | 3.5 | 3.0 | 3.0 | 3.5 | 3.0 |
Frontier Airlines |
2.8 | 3.5 | 3.5 | 3.5 | 3.0 | 2.0 | 1.5 | 2.5 | 2.5 |
Overall Rating
4.0
On time arrival
4.5
Check-in & Boarding
4.0
Cleanliness
4.0
Customer Service
4.0
Food & Beverage
3.5
Entertainment
4.0
Legroom
3.5
Seat Comfort
3.5
Overall Rating
3.5
On time arrival
4.0
Check-in & Boarding
3.5
Cleanliness
3.5
Customer Service
3.5
Food & Beverage
3.0
Entertainment
3.0
Legroom
3.5
Seat Comfort
3.0
Overall Rating
3.0
On time arrival
3.5
Check-in & Boarding
3.5
Cleanliness
3.5
Customer Service
3.0
Food & Beverage
2.0
Entertainment
1.5
Legroom
2.5
Seat Comfort
2.5
Good to know:
- Lambert-St. Louis International is the major airport in Saint Louis and surrounding area.
Enter your preferred departure airport and travel dates into the search form above to unlock the latest Saint Louis flight deals.
Track the flight prices from Denver to Saint Louis by subscribing to Fare Alerts to never miss the best deals possible.
Did you know that you could find even better deals when you use our Mobile App?. Awesome Deals
notifications_active In the past few days the following airlines offered the lowest prices from Denver to Saint Louis: Frontier Airlines, American Airlines and Delta Air Lines..
Frontier AirlinesFri, 12 Sep DEN STL
Mon, 15 Sep STL DEN Trip duration: 3 days$146.97
Frontier AirlinesTue, 12 Aug DEN STL
Thu, 21 Aug STL DEN Trip duration: 9 days$154.97
Frontier AirlinesThu, 11 Sep DEN STL
Sun, 14 Sep STL DEN Trip duration: 3 days$155.97
Frontier AirlinesThu, 25 Sep DEN STL
Sun, 28 Sep STL DEN Trip duration: 3 days$164.97
American AirlinesWed, 23 Jul DEN STL
Wed, 30 Jul STL DEN Trip duration: 7 days$176.36
Frontier AirlinesWed, 23 Jul DEN STL
Wed, 30 Jul STL DEN Trip duration: 7 days$183.97
Frontier AirlinesMon, 28 Jul DEN STL
Wed, 30 Jul STL DEN Trip duration: 2 days$189.97
Delta Air LinesWed, 23 Jul DEN STL
Sun, 27 Jul STL DEN Trip duration: 4 days$196.37
Frontier AirlinesWed, 23 Jul DEN STL
Sun, 27 Jul STL DEN Trip duration: 4 days$210.97
American AirlinesSat, 26 Jul DEN STL
Mon, 28 Jul STL DEN Trip duration: 2 days$216.37
Frontier AirlinesSun, 06 Jul DEN STL
Sun, 13 Jul STL DEN Trip duration: 7 days$230.97
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Frequently Asked Questions
- How long is a direct flight from Denver to Saint Louis?A direct flight from Denver to Saint Louis takes roughly 01 hours 52 minutes.
- How many direct flights are there between Denver to Saint Louis daily?On average, there are 35 direct flights from Denver to Saint Louis each day.
- Which airlines offer cheap airfare from Denver to Saint Louis?That may change at any time. But in the past 14 days, the cheapest tickets we've found were with Frontier Airlines, American Airlines and Delta Air Lines.
- Do I need my passport to fly from Denver to Saint Louis?Nope, not this time.
- Which airlines fly from Denver to Saint Louis most often?Delta Air Lines, American Airlines and Frontier Airlines are the top.
- What's the cheapest day to fly from Denver to Saint Louis?That depends. Recently, the cheapest day to fly from Denver to Saint Louis has been Wednesday. And the cheapest return flight from Wednesday has been. That said, the cheapest departure days are constantly changing.
- Which airport will I be flying from in Denver?When departing from Denver you'll be flying out of Denver International.
- Which airport will I be flying from in Saint Louis?When departing from Saint Louis you'll be flying out of Lambert-St. Louis International.
- How is Justfly.com so good at finding cheap flights?We've taken an oath of secrecy and vowed never to say. Just kidding. Our team and technology allows us to browse through hundreds of airlines and hundreds of thousands of flights to find the lowest prices. Then we pass the savings on to you.
- Can Justfly.com help me save money in any other way?We're glad you asked. We help you save money with our Fare Alerts, Price Trend charts and multi-ticket bookings. We also help you save on hotels and car rentals.
- How many airlines does Justfly.com search to find affordable flights?We typically search over 400 airlines.
- Can Justfly.com's Price Trend tool really tell me the best time to buy tickets?Absolutely! That's why we've made it accessible to you.
- Will the price of my flight change?Flight prices and availability change often. To counter this, we update the important data as often as possible every step of the way.
- How will I receive my booking confirmation and travel information?We'll send you an email with the important details!
- Can you cancel or change Justfly.com flights?You sure can. But give us a call first. We'll do our best to find a solution. However, in some cases, if we cancel your booking, we'll have to charge an administrative fee of $75 (domestic), $125 (trans-border between Canada and USA) and $200 (international).
- Are Justfly.com's tickets refundable?All bookings are currently non-refundable.
- How do I contact Justfly.com?To find answers to all of your questions, click here to visit our support page.