Cheap flights from Lambert-St Louis Intl to Denver (STL - DEN)

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The best prices from Lambert-St Louis Intl to Denver are usually found in September or October, booked 60 days in advance, depart on a Wednesday or Tuesday and return on a Saturday

How to find the cheapest flight from
Lambert-St Louis Intl (STL) to Denver (DEN)

All the information you need to plan the best STL to DEN flight in 2021: compare Lambert-St Louis Intl to Denver flight prices with the expected peak season, weather and rainfall in Denver.
STL - DEN
Price
$127 - $218
DEN
Temperature
44.6 - 89.6 °F
DEN
Rainfall
0.5 - 2.7 inches

Popular in

December

High demand for flights, 26% potential price rise

Cheapest in

September

Best time to find cheap flights, 21% potential price drop

Round-trip from

$127

From Lambert-St Louis Intl to Denver

One-way from

$76

One-way flight from Lambert-St Louis Intl to Denver

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Lambert-St Louis Intl to Denver?

Tuesday is generally a great day to depart. Flying on this day could help you save up to 61%.

How far in advance should I book a flight from Lambert-St Louis Intl to Denver?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 14 days in advance, which can save you up to 12% on flights from Lambert-St Louis Intl to Denver compared to booking the week you need them. Waiting 14 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $88. For sooner than that we have options available in the next 3 days from $106.

What is the cheapest month to fly from Lambert-St Louis Intl to Denver?

August is one of the best times of the year to fly to Denver from Lambert-St Louis Intl. Prices for August average $98 per person but you can even find prices for as low as $36. The most expensive prices can be found in the month of December. Opting for a August flight can save you 38% on your journey compared to booking in August

When is the cheapest time to fly from Lambert-St Louis Intl to Denver (STL - DEN)?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 41% on flights from Lambert-St Louis Intl to Denver by exploring options for tickets in the evening.

Cheap flights from Lambert-St Louis Intl to Denver in May, June 2021

The best prices found for STL to DEN flights for May, June
20 May - 22 May
$62pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
21 May - 22 May
$63pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
17 May - 22 May
$67pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis

Lambert-St Louis Intl to Denver 2021 flight deals

Cheap flights to Denver from Lambert-St Louis Intl found for this year
20 May - 22 May
$62pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
21 May - 22 May
$63pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
17 May - 22 May
$67pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis

Non-stop flights to Denver from Lambert-St Louis Intl

Save time with Lambert-St Louis Intl to Denver direct flight deals
20 May - 22 May
$62pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
21 May - 22 May
$63pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
17 May - 22 May
$67pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis

Last minute flights from Lambert-St Louis Intl to Denver

Late deals on round-trip flights to Denver from Lambert-St Louis Intl, departing today and this week
20 May - 22 May
$62pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
21 May - 22 May
$63pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
17 May - 22 May
$67pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis

One-way flights to Denver from Lambert-St Louis Intl

The cheapest one-way flights from Lambert-St Louis Intl to Denver
2:00 am - 5:53 am
American Airlines
1 Stop
4h 53m
STL - DEN
American Airlines
7:00 am - 1:12 pm
Spirit Airlines
1 Stop
7h 12m
STL - DEN
Spirit Airlines
$87
Expedia
3:55 am - 9:24 am
Delta
1 Stop
6h 29m
STL - DEN
Delta
$89
Delta

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Lambert-St Louis Intl</span> to <span class="emphasized">Denver</span> flights.

Flight FAQs

From Lambert-St Louis Intl to Denver

Are flight prices decreasing from St Louis to Denver due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both St Louis and Denver for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Which airlines flying from Lambert-St Louis to Denver Intl have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Lambert-St Louis to Denver Intl that may be offering flexible cancellation policies are Frontier, United Airlines, and American Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

What airports do I use to fly from St. Louis to Denver?

You will need to book a flight from Lambert-St Louis to Denver Intl if you want to fly from St. Louis to Denver. At least 6 different airlines have flights from Lambert-St Louis (STL) to Denver Intl (DEN) on a regular basis. There are 10 flights to Denver from the St. Louis airport per day. If you manage to book one that is nonstop, then you can expect the flight time from STL to DEN to be around 2h 17m.

Can I find flights from Lambert-St Louis Intl to Denver for under $100 on Cheapflights?

Yes, there are multiple flights from Lambert-St Louis Intl to Denver for under $100. The cheapest flight booked recently is on Frontier for just $62, but on average you can expect to pay $85.

Are there nonstop flights from Lambert-St Louis Intl to Denver for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from Lambert-St Louis Intl to Denver under $100. A good price for a nonstop flight from Lambert-St Louis Intl to Denver is less than $85.

Are there last-minute flights available from Lambert-St Louis Intl to Denver for under $100?

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

How popular is this flight route?

Flights from Lambert-St Louis to Denver Intl have been viewed 358 times in the past calendar month.

Does it rain more in St Louis or Denver?

When traveling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in St Louis is roughly greater than that of Denver. You can assume this to be the case over the next 18 days.

Is St Louis weather warmer or cooler than Denver?

Temperatures around the 90 °F's can be experienced in July. The weather in Denver is the same as in St Louis. Plan for potential changes in flight availability as peak weather approaches in this location.

How long is the flight from Lambert-St Louis Intl to Denver?

For as low as $126, Frontier can have you in Denver from Lambert-St Louis Intl in 2h 21m. Generally, flights for this route are nonstop.

What is the cheapest airline to fly from Lambert-St Louis Intl to Denver round-trip?

Flying on Frontier is currently your cheapest option to Denver, with prices starting at $62. Frontier is priced at 61% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Lambert-St Louis Intl to Denver one-way?

The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $31. However, be on the lookout for offers from American Airlines and Delta, as they are both options that can get you from Lambert-St Louis Intl to Denver for a low price.

Alternative routes for Lambert-St Louis Intl to Denver

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Denver

Things to know before you go - useful duration and weather info for your trip from Lambert-St Louis Intl to Denver.
Flight duration
2h 18m
Average temperature for May in Denver
73.4 °F
Avg rainfall for May in Denver
1.9 ″

Airports servicing St. Louis

Airports servicing Denver

Top 5 airlines flying from Lambert-St Louis Intl to Denver

The chart below displays the airlines Cheapflights users traveling from Lambert-St Louis Intl to Denver choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Frontier
$57 $140 No cancel fee 62%
American Airlines
$57 $159 No cancel fee 71%
Delta
$77 $176 No cancel fee N/A
United Airlines
$97 $244 No cancel fee 69%
Southwest
$69 $285 No cancel fee 63%

Hourly flight availability from Lambert-St Louis Intl to Denver

See what time of day planes typically take off from Lambert-St Louis Intl towards Denver.
Morning 6 AM to noon 48% of STL to DEN departures
Afternoon Noon to 6 PM 40% of STL to DEN departures
Early morning Midnight to 6 AM 7% of STL to DEN departures
Evening 6 PM to midnight 5% of STL to DEN departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Lambert-St Louis Intl to Denver
See how many times per day planes take to the skies headed from Lambert-St Louis Intl to Denver.
Sunday
11 daily flights
Monday
12 daily flights
Tuesday
11 daily flights
Wednesday
12 daily flights
Thursday
12 daily flights
Friday
12 daily flights
Saturday
6 daily flights
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