Cheap flights from Denver (DEN) to St. Charles, MO from $47

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
DEN — STL
Jun 18 — Jun 251

The best prices from Denver Intl to St. Charles are usually found in September or August, booked 69 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap flight deals from Denver to St. Charles

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to St. Charles (CH5). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 13, 2024.

Popular in

December

Cheapest in

September

Round-trip from

$318

One-way from

$98
High demand for flights, 19% potential price rise
Best time to find cheap flights, 21% potential price drop
From Denver Intl to St. Charles
One-way flight from Denver Intl to St. Charles

How far in advance should I book a flight from Denver to St. Charles?

To save up to 87% on this flight, we recommend booking at least 49 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Denver to St. Charles from $137 1-2 weeks out and tickets from $295 for flights departing within the next 72 hours.

What is the cheapest month to fly from Denver to St. Charles?

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, September can be a great choice for travel to St. Charles. Flights to St. Charles from Denver in September are about $162 on average during September, but can be found for as low as $47.

What is the cheapest time of day to fly from DEN to CH5?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denver to St. Charles as you normally would.

Cheap Denver to St. Charles flights in June & July 2024

Find cheap flight options from Denver to St. Charles specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,117,830 searches. Prices were last updated on June 13, 2024.
These are some of the most attractive deals on flights from Denver to St. Charles in 2024. Check back in a little while for more flight options.
Wed 6/196:20 amDEN - STL
Nonstop2h 09mFrontier
Tue 6/253:47 pmSTL - DEN
Nonstop2h 29mFrontier
Deal found 6/12$58
Thu 7/114:45 pmDEN - STL
Nonstop2h 12mFrontier
Tue 7/163:47 pmSTL - DEN
Nonstop2h 22mFrontier
Deal found 6/13$77
Wed 6/196:20 amDEN - STL
Nonstop2h 09mFrontier
Sat 6/228:02 pmSTL - DEN
Nonstop2h 30mFrontier
Deal found 6/11$87
Wed 6/196:20 amDEN - STL
Nonstop2h 09mFrontier
Sat 6/228:02 pmSTL - DEN
Nonstop2h 30mFrontier
Deal found 6/12$88
Tue 7/911:41 amDEN - STL
Nonstop2h 06mFrontier
Wed 7/108:02 pmSTL - DEN
Nonstop2h 23mFrontier
Deal found 6/12$89
Tue 7/911:41 amDEN - STL
Nonstop2h 06mFrontier
Fri 7/125:19 pmSTL - DEN
Nonstop2h 18mFrontier
Deal found 6/12$93
Thu 7/44:51 pmDEN - STL
Nonstop2h 11mFrontier
Thu 7/118:57 pmSTL - DEN
Nonstop2h 23mFrontier
Deal found 6/12$97
Tue 7/211:39 amDEN - STL
Nonstop2h 08mFrontier
Sat 7/68:02 pmSTL - DEN
Nonstop2h 23mFrontier
Deal found 6/12$98
Fri 7/56:15 amDEN - STL
Nonstop2h 10mFrontier
Tue 7/93:47 pmSTL - DEN
Nonstop2h 22mFrontier
Deal found 6/12$103

Denver to St. Charles 2024 flight deals

Discover exclusive flight deals for travel between Denver and St. Charles in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,117,830 searches. Data last updated June 13, 2024.
These are some of the most attractive deals on flights from Denver to St. Charles in 2024. Check back in a little while for more flight options.
Tue 8/138:44 amDEN - STL
Nonstop2h 06mFrontier
Wed 8/148:00 pmSTL - DEN
Nonstop2h 28mFrontier
Deal found 6/12$47
Wed 8/146:26 amDEN - STL
Nonstop2h 11mFrontier
Wed 8/148:00 pmSTL - DEN
Nonstop2h 28mFrontier
Deal found 6/11$48
Tue 8/138:44 amDEN - STL
Nonstop2h 06mFrontier
Fri 8/168:00 pmSTL - DEN
Nonstop2h 28mFrontier
Deal found 6/11$52
Mon 8/126:15 amDEN - STL
Nonstop2h 10mFrontier
Sat 8/178:00 pmSTL - DEN
Nonstop2h 28mFrontier
Deal found 6/11$53
Fri 8/96:15 amDEN - STL
Nonstop2h 10mFrontier
Sat 8/108:02 pmSTL - DEN
Nonstop2h 23mFrontier
Deal found 6/11$55
Wed 7/176:15 amDEN - STL
Nonstop2h 10mFrontier
Sat 7/208:02 pmSTL - DEN
Nonstop2h 23mFrontier
Deal found 6/11$57
Mon 8/126:15 amDEN - STL
Nonstop2h 10mFrontier
Fri 8/168:00 pmSTL - DEN
Nonstop2h 28mFrontier
Deal found 6/11$58
Wed 7/106:15 amDEN - STL
Nonstop2h 10mFrontier
Wed 7/178:02 pmSTL - DEN
Nonstop2h 23mFrontier
Deal found 6/10$67
Sat 8/106:15 amDEN - STL
Nonstop2h 10mFrontier
Wed 8/148:00 pmSTL - DEN
Nonstop2h 28mFrontier
Deal found 6/11$70

Denver to St. Charles flights leaving soon

Find last-minute flight options from Denver to St. Charles for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,117,830 searches. Data last updated June 13, 2024.
Have a look at some of the flights available from Denver to St. Charles departing last-minute. It's wise to confirm all flight details are correct before booking.
Wed 6/196:20 amDEN - STL
Nonstop2h 09mFrontier
Sat 6/228:02 pmSTL - DEN
Nonstop2h 30mFrontier
Deal found 6/11$86
Tue 6/1811:39 amDEN - STL
Nonstop2h 08mFrontier
Thu 6/203:32 pmSTL - DEN
Nonstop2h 29mFrontier
Deal found 6/10$87
Tue 6/1811:39 amDEN - STL
Nonstop2h 08mFrontier
Wed 6/268:02 pmSTL - DEN
Nonstop2h 30mFrontier
Deal found 6/12$111
Tue 6/183:56 pmDEN - STL
1 stop17h 46mFrontier
Thu 6/203:32 pmSTL - DEN
Nonstop2h 29mFrontier
Deal found 6/10$117
Tue 6/1811:00 pmDEN - STL
1 stop10h 42mFrontier
Wed 6/268:02 pmSTL - DEN
Nonstop2h 30mFrontier
Deal found 6/12$128
Fri 6/216:31 amDEN - STL
Nonstop2h 09mFrontier
Mon 6/248:22 pmSTL - DEN
Nonstop2h 30mFrontier
Deal found 6/11$137
Wed 6/1911:00 pmDEN - STL
1 stop10h 42mFrontier
Tue 6/253:47 pmSTL - DEN
Nonstop2h 29mFrontier
Deal found 6/12$147
Wed 6/196:20 amDEN - STL
Nonstop2h 09mFrontier
Sun 6/233:37 pmSTL - DEN
Nonstop2h 29mFrontier
Deal found 6/11$149
Wed 6/196:20 amDEN - STL
Nonstop2h 09mFrontier
Sat 6/223:08 pmSTL - DEN
1 stop8h 43mFrontier
Deal found 6/11$156

One-way flights to St. Charles from Denver

Search for one-way flight options from Denver to St. Charles. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,117,830 searches. Data last updated June 13, 2024.
Take a look at some of the one-way flights we've detected from Denver to St. Charles. Those seeking round-trip flights from Denver to St. Charles should utilize the search form at the the top of the page.
Fri 7/126:15 amDEN - STL
Nonstop2h 10mFrontier
Deal found 6/12$49
Wed 7/36:20 amDEN - STL
Nonstop2h 09mFrontier
Deal found 6/12$55
Thu 6/2011:24 amDEN - STL
Nonstop2h 08mFrontier
Deal found 6/12$59
Fri 6/286:31 amDEN - STL
Nonstop2h 09mFrontier
Deal found 6/12$68
Tue 7/1611:41 amDEN - STL
Nonstop2h 06mFrontier
Deal found 6/12$70
Tue 9/109:00 amDEN - STL
1 stop6h 51mAmerican Airlines
Deal found 6/12$79
Fri 9/276:26 amDEN - STL
Nonstop2h 11mFrontier
Deal found 6/12$81
Mon 9/912:55 amDEN - STL
1 stop7h 11mDelta
Deal found 6/13$88
Mon 9/236:20 pmDEN - STL
Nonstop2h 08mUnited Airlines
Deal found 6/12$89

Find flights from Denver to St. Charles within your budget

Customize your flight search to find flights from Denver to St. Charles 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, Cheapflights users made 3,117,830 searches. Data last updated June 13, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$47 - $158

Route

Depart

Return

Price

Denver IntlLambert-St Louis

DEN - STL

DENSTL

Denver Intl

Tue 8/13

Nonstop2h 06m

Lambert-St Louis

Wed 8/14

Nonstop2h 28m

$47

Denver IntlLambert-St Louis

DEN - STL

DENSTL

Denver Intl

Wed 8/14

Nonstop2h 11m

Lambert-St Louis

Wed 8/14

Nonstop2h 28m

$48

Denver IntlLambert-St Louis

DEN - STL

DENSTL

Denver Intl

Tue 8/13

Nonstop2h 06m

Lambert-St Louis

Fri 8/16

Nonstop2h 28m

$52

Denver IntlLambert-St Louis

DEN - STL

DENSTL

Denver Intl

Mon 8/12

Nonstop2h 10m

Lambert-St Louis

Sat 8/17

Nonstop2h 28m

$53

Denver IntlLambert-St Louis

DEN - STL

DENSTL

Denver Intl

Fri 8/9

Nonstop2h 10m

Lambert-St Louis

Sat 8/10

Nonstop2h 23m

$55

Denver IntlLambert-St Louis

DEN - STL

DENSTL

Denver Intl

Wed 7/17

Nonstop2h 10m

Lambert-St Louis

Sat 7/20

Nonstop2h 23m

$57

Denver IntlLambert-St Louis

DEN - STL

DENSTL

Denver Intl

Tue 8/13

Nonstop2h 09m

Lambert-St Louis

Sat 8/17

1 stop6h 22m

$130

Denver IntlLambert-St Louis

DEN - STL

DENSTL

Denver Intl

Sat 7/27

1 stop8h 20m

Lambert-St Louis

Sat 8/10

Nonstop2h 23m

$132

Denver IntlLambert-St Louis

DEN - STL

DENSTL

Denver Intl

Tue 8/13

1 stop7h 22m

Lambert-St Louis

Fri 8/16

1 stop7h 17m

$158

Flights are sorted by cheapest first

Deals found on 6/12

How far ahead should I book a flight from Denver to St. Charles?

Use this chart to determine the optimal time to book a round-trip flight from Denver to St. Charles. Price data was last updated on June 12, 2024.
To ensure you get the cheapest price possible for a flight from Denver to St. Charles, you should look to book at least 69 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Search Deals

What is the cheapest day to fly from Denver to St. Charles?

Use this chart to determine the cheapest time to fly round-trip from Denver to St. Charles. Price data was last updated on June 9, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Denver to St. Charles flight should consider departing on Wednesday mornings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Denver to St. Charles

Have a flexible travel schedule? Discover the best time to fly to St. Charles from Denver with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in St. Charles by month

Plan your trip to St. Charles by taking into account the average temperature and rainfall totals by month.

STL

Temperature

32 - 80.6 °F

If weather is an important factor for your trip to St. Charles, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Charles

Get insights into the airlines that provide service to St. Charles. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Charles. Reviews last updated June 13, 2024.
To help decide which airline to fly from Denver to St. Charles, see what other customers have to say about Frontier, United Airlines and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
9,272 reviews

Boarding

8.2

Entertainment

7.3

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Reviews

1 / 10

Great airline! I would fly with them again. Overall, very positive experience along every step of the way. I was so jazzed they offer direct flights from Denver to Anchorage! Great customer service.

8.1
Very good
9,272 reviews
8.1
Very good
9,272 reviews

Boarding

8.2

Entertainment

7.3

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Reviews

1 / 10

Great airline! I would fly with them again. Overall, very positive experience along every step of the way. I was so jazzed they offer direct flights from Denver to Anchorage! Great customer service.

8.0
Very good
10,000 reviews
8.1
Very good
9,272 reviews

Boarding

8.2

Entertainment

7.3

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Reviews

1 / 10

Great airline! I would fly with them again. Overall, very positive experience along every step of the way. I was so jazzed they offer direct flights from Denver to Anchorage! Great customer service.

7.4
Good
10,000 reviews
8.1
Very good
9,272 reviews

Boarding

8.2

Entertainment

7.3

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Reviews

1 / 10

Great airline! I would fly with them again. Overall, very positive experience along every step of the way. I was so jazzed they offer direct flights from Denver to Anchorage! Great customer service.

7.3
Good
10,000 reviews
8.1
Very good
9,272 reviews

Boarding

8.2

Entertainment

7.3

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Reviews

1 / 10

Great airline! I would fly with them again. Overall, very positive experience along every step of the way. I was so jazzed they offer direct flights from Denver to Anchorage! Great customer service.

7.2
Good
1,276 reviews
8.1
Very good
9,272 reviews

Boarding

8.2

Entertainment

7.3

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Reviews

1 / 10

Great airline! I would fly with them again. Overall, very positive experience along every step of the way. I was so jazzed they offer direct flights from Denver to Anchorage! Great customer service.

Related info for your journey

Find useful and relevant information for your journey from Denver to St. Charles. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly from for flights from Denver to St. Charles?

    Denver Intl (DEN), located 18.5 mi from the city center, is the airport you fly out of when you book flights from Denver to St. Charles. 3 airlines have flights from Denver Intl to St. Charles on a regular basis. Booking flights from Denver Intl to St. Charles should not be difficult; the airport handles an average of 20 outbound flights to St. Charles per day.

  • Can I find flights from Denver to St. Charles for under $100 on Cheapflights?

    Yes, there are multiple flights from Denver to St. Charles for under $100. The cheapest flight booked recently is on Frontier for just $47, but on average you can expect to pay $72.

  • Are there nonstop flights from Denver to St. Charles for under $100 on Cheapflights?

    Cheapflights has at least 20 direct flights from Denver to St. Charles under $100. A good price for a nonstop flight from Denver to St. Charles is less than $72.

  • Are there last-minute flights available from Denver to St. Charles for under $100?

    There are currently 20+ open flights from Denver to St. Charles within the next 7 days for less than $100.

  • How popular is this Denver to St. Charles flight route?

  • What are the cheapest airlines to fly from Denver to St. Charles one-way?

    The cheapest airlines for a one-way flight from Denver to St. Charles are Frontier ($49), American Airlines ($79), and Delta ($88).

  • What are the most reliable airlines from Denver to St. Charles?

    The top 3 most reliable airlines when flying from Denver to St. Charles are Frontier (77%), United Airlines (75%) and Air Canada (75%).

  • What are the cheapest flights from Denver to St. Charles?

    While on average a flight from Denver to St. Charles is generally $197, our data shows the cheapest flight currently is $48. When looking at the most popular route, (Denver Intl - Lambert-St Louis), you can expect to pay $110 for that flight.

  • What does DEN to STL mean?

    DEN stands for Denver Intl Airport, while STL stands for Lambert-St Louis Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Springfield Capital Airport (SPI), Columbia Regional Airport (COU), Belleville Airport (BLV), Quincy Regional Airport (UIN).

  • Can I find deals for flights from Denver to St. Charles that include extra baggage allowance?

    The amount of baggage you can bring on your Denver to St. Charles flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Denver to St. Charles with specific airlines?

    Yes, Cheapflights allows you to browse and filter Denver to St. Charles flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Denver to St. Charles that include hotel bookings?

    Yes. In addition to deals on Denver to St. Charles flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to St. Charles?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to St. Charles.

  • Can I find deals for business class flights from Denver to St. Charles?

    Yes. Cheapflights offers flight deals from Denver to St. Charles by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Denver to St. Charles that allow pets onboard?

    Many airlines flying from Denver to St. Charles offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Denver to St. Charles?

    Yes, you can often find last-minute deals on Denver to St. Charles flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Denver to St. Charles flight deals updated?

    The Denver to St. Charles flight deals you see on this page were last updated on 6/12.

  • What are the most popular airlines that fly from Denver to St. Charles?

  • What is the cheapest month to book a flight from Denver to St. Charles?

    Currently, September is the cheapest month in which you can book a flight from Denver to St. Charles (average of $318). Flying from Denver to St. Charles in July is currently the most expensive (average of $362). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 3 airlines flying from Denver to St. Charles

Discover the top 3 airlines that operate flights from Denver to St. Charles. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,117,830 searches. Data last updated June 13, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$48Average$128FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$116Average$299FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$236Average$424FlexibilityNo cancel feeOn-time71%

Search flights from Denver to St. Charles by cabin class

Find flights from Denver to St. Charles, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Hourly flight availability from Denver to St. Charles

Find hourly flight availability from Denver to St. Charles. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 13, 2024.
6%of flight departuresEarly morningMidnight to 6 am
24%of flight departuresMorning6 am to noon
65%of flight departuresAfternoonNoon to 6 pm
5%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Denver to St. Charles

Explore weekly flight availability from Denver to St. Charles. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 13, 2024.
Sunday16daily flights
Monday24daily flights
Tuesday22daily flights
Wednesday22daily flights
Thursday24daily flights
Friday24daily flights
Saturday12daily flights
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