Find Cheap Flights from Denver International to Lambert-St Louis (DEN - STL)

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Denver International to Lambert-St Louis Flight Information

Avg. Flight Duration 2h 16m
Flights Arrive in Lambert-St Louis
Flights Depart from Denver International
Flight Price $29
Distance 768 miles
Airlines Frontier, United

Good to Know

Low Season:
February
Best time to beat the crowds
2%
expected price decrease
High Season:
October
Most popular time to fly
8%
expected price increase
Average Price:
$202
(avg. price over the last 2 weeks)
Good Deal:
$144
or less (round trip)

When to Book Flights from Denver International to Lambert-St Louis

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top Tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $143 or less.
The cheapest flight from Denver International to Lambert-St Louis was found 27 days before departure, on average.
Book at least 2 weeks before departure in order to get a below-average price.
High season is considered to be September, October and November. The cheapest month to fly is February.
Morning departure is around 18% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Denver International to Lambert-St Louis Flights

How long does a flight from Denver International to Lambert-St Louis take?
An average nonstop flight takes 2h 01m, covering a distance of 768 miles.
How many flights are there between Denver International and Lambert-St Louis?
There are 148 (nonstop) flights between Denver International and Lambert-St Louis per week, averaging 22 per day.
Which airlines provide the cheapest flights from Denver International to Lambert-St Louis?
In the past 3 days, the cheapest round-trip tickets were found on Frontier ($29), Multiple Airlines ($127) and United ($163).
Do I need a passport to fly between Denver International and Lambert-St Louis?
No.
Which airlines fly most frequently between Denver International and Lambert-St Louis?
Southwest (7 times daily), Air Canada (6 times daily), United (6 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Denver International to Lambert-St Louis?
For Denver International to Lambert-St Louis, Saturday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from Lambert-St Louis back to Denver International, the best deals are generally found on Saturday, with Tuesday being the most expensive.

Book cheap flights from Denver International to Lambert-St Louis (round-trip)

Airports
Origin
Denver
$29
only
$29
Destination
St. Louis
$29
only
$29
Sat, Apr 28
DEN
STL
2h 12m
Mon, Apr 30
STL
DEN
2h 28m
Trip: 3 days
5.5OkayShow reviews
Overall 5.5 Okay
Based on 175 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
STL
Mediocre 2.0

Unexpected 45$ per carry on. Horseshit

DEN
STL
Mediocre 2.6

The price.

No complimentary snacks provided. Had to pay for food and beverages with credit/debit card so I didn’t even bother. Takeoff was the scariest experience of my life. The plane swerved side to side as we were taking off and was extremely shaky while ascending. I said hi to a flight attendant as I was waking to my seat and she just looked at me with a blank face. No friendly response or greeting whatsoever. The seat were incredibly stiff and you couldn’t tilt them back at all.

DEN
STL
Excellent 8.0

Breckinridge whiskey

Bit cramped

DEN
STL
Good 6.5

The tickets look like a deal until they charge for every other thing. The information regarding what bag can be carried on without a fee is very confusing. We paid and then saw people rolling cases and putting them in the overhead bin. The seat prices are ridiculous so you don't want to pay for a seat they will assign you for free, I was then told I had to go to the gate to get a seat assignment even though I had already purchased a ticket. I waited for almost an hour before someone showed up. I was told the only seats left were the exit rows. Luckily I am healthy. If I have paid for a ticket Frontier should guarantee me a seat. We had to wait in line even though we had already paid for our bags and some of us went on line and checked in and had boarding passes. Where is the short cut then?? It was so convoluted we will never fly Frontier again. Too much work, let me pay for the ticket and let me have a bag and give me a seat for crying out loud. The flight crew was great. Very nice.

DEN
STL
Okay 4.0

Same as above

Wed, Apr 25
DEN
STL
2h 12m
Thu, Apr 26
STL
DEN
2h 28m
Trip: 2 days
5.5OkayShow reviews
Overall 5.5 Okay
Based on 175 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
STL
Mediocre 2.0

Unexpected 45$ per carry on. Horseshit

DEN
STL
Good 6.5

The tickets look like a deal until they charge for every other thing. The information regarding what bag can be carried on without a fee is very confusing. We paid and then saw people rolling cases and putting them in the overhead bin. The seat prices are ridiculous so you don't want to pay for a seat they will assign you for free, I was then told I had to go to the gate to get a seat assignment even though I had already purchased a ticket. I waited for almost an hour before someone showed up. I was told the only seats left were the exit rows. Luckily I am healthy. If I have paid for a ticket Frontier should guarantee me a seat. We had to wait in line even though we had already paid for our bags and some of us went on line and checked in and had boarding passes. Where is the short cut then?? It was so convoluted we will never fly Frontier again. Too much work, let me pay for the ticket and let me have a bag and give me a seat for crying out loud. The flight crew was great. Very nice.

DEN
STL
Mediocre 3.0

Disorganization with boarding process. Gate changes from that which was indicated on boarding pass, without notification. Expensive baggage/fees. No basic complimentary accommodations (snacks). Uncomfortable seats lacking ergonomic design and headrest. Small spaces for personal items.

DEN
STL
Excellent 10.0

the crew was very entertaining which always helps make the trip more pleasant.

Too bumping of a flight. Not sure there was anything that could be done about that but I'm guessing a higher altitude may of helped but i am not a expert, just a nervous flier.

DEN
STL
Okay 4.0

Same as above

Tue, May 1
DEN
STL
2h 07m
Fri, May 4
STL
DEN
2h 21m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Apr 28
DEN
STL
2h 12m
Mon, Apr 30
STL
DEN
11h 10m
Trip: 3 days
5.5OkayShow reviews
Overall 5.5 Okay
Based on 175 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
STL
Okay 4.0

Same as above

DEN
STL
Mediocre 3.0

Flight was abnormally bumpy to the point even the crew mentioned it. I could hear the crew the whole flight chatting and bitching about Work etc

DEN
STL
Good 6.0

seats are worn out, you have to pay to place a bag in overhead compartments

DEN
STL
Okay 4.0

Almost. 8 hour delay, and was never told real reason. Was offered $10 lunch, and nothing else. I had to change my vacation plans because of delay! Not a happy customer!!!!

DEN
STL
Mediocre 2.6

The price.

No complimentary snacks provided. Had to pay for food and beverages with credit/debit card so I didn’t even bother. Takeoff was the scariest experience of my life. The plane swerved side to side as we were taking off and was extremely shaky while ascending. I said hi to a flight attendant as I was waking to my seat and she just looked at me with a blank face. No friendly response or greeting whatsoever. The seat were incredibly stiff and you couldn’t tilt them back at all.

Sat, May 26
DEN
STL
2h 01m
Wed, May 30
STL
DEN
2h 21m
Trip: 5 days
6.9GoodShow reviews
Overall 6.9 Good
Based on 30 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
DEN
STL
Excellent 10.0

newer plane. more personal space per seat

DEN
STL
Okay 4.6

flight was on time

airport gate lady would't let me run to the bathroom and quickly return for my checked carry-on for "security reasons." Then I heard about 4-5 people being paged to come pick up their checked carry-on luggage.

DEN
STL
Excellent 8.0

That the flight was earlier then Expected

Bag fee

DEN
STL
Excellent 10.0

Same as above. Did notice the woman staffing the counter at boarding having extreme patience with people's problems and non problems. She was great and deserves a raise. Denver gate B 85 between 1:00 and 3:00 6/15/16.

DEN
STL
Mediocre 2.6

Crew was nice

Late by 40 minutes. Heavy landing

Sat, May 5
DEN
STL
2h 07m
Wed, May 16
STL
DEN
2h 29m
Trip: 12 days
5.5OkayShow reviews
Overall 5.5 Okay
Based on 175 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
STL
Mediocre 3.0

Flight was abnormally bumpy to the point even the crew mentioned it. I could hear the crew the whole flight chatting and bitching about Work etc

DEN
STL
Mediocre 2.0

Unexpected 45$ per carry on. Horseshit

DEN
STL
Mediocre 2.6

The price.

No complimentary snacks provided. Had to pay for food and beverages with credit/debit card so I didn’t even bother. Takeoff was the scariest experience of my life. The plane swerved side to side as we were taking off and was extremely shaky while ascending. I said hi to a flight attendant as I was waking to my seat and she just looked at me with a blank face. No friendly response or greeting whatsoever. The seat were incredibly stiff and you couldn’t tilt them back at all.

DEN
STL
Excellent 8.0

Breckinridge whiskey

Bit cramped

DEN
STL
Good 6.5

The tickets look like a deal until they charge for every other thing. The information regarding what bag can be carried on without a fee is very confusing. We paid and then saw people rolling cases and putting them in the overhead bin. The seat prices are ridiculous so you don't want to pay for a seat they will assign you for free, I was then told I had to go to the gate to get a seat assignment even though I had already purchased a ticket. I waited for almost an hour before someone showed up. I was told the only seats left were the exit rows. Luckily I am healthy. If I have paid for a ticket Frontier should guarantee me a seat. We had to wait in line even though we had already paid for our bags and some of us went on line and checked in and had boarding passes. Where is the short cut then?? It was so convoluted we will never fly Frontier again. Too much work, let me pay for the ticket and let me have a bag and give me a seat for crying out loud. The flight crew was great. Very nice.

Tue, May 8
DEN
STL
2h 07m
Wed, May 16
STL
DEN
2h 29m
Trip: 9 days
5.5OkayShow reviews
Overall 5.5 Okay
Based on 175 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
STL
Good 6.5

The tickets look like a deal until they charge for every other thing. The information regarding what bag can be carried on without a fee is very confusing. We paid and then saw people rolling cases and putting them in the overhead bin. The seat prices are ridiculous so you don't want to pay for a seat they will assign you for free, I was then told I had to go to the gate to get a seat assignment even though I had already purchased a ticket. I waited for almost an hour before someone showed up. I was told the only seats left were the exit rows. Luckily I am healthy. If I have paid for a ticket Frontier should guarantee me a seat. We had to wait in line even though we had already paid for our bags and some of us went on line and checked in and had boarding passes. Where is the short cut then?? It was so convoluted we will never fly Frontier again. Too much work, let me pay for the ticket and let me have a bag and give me a seat for crying out loud. The flight crew was great. Very nice.

DEN
STL
Mediocre 2.0

Flight time was changed, and I wasn't notified, so I missed the flight.

DEN
STL
Mediocre 2.0

Unexpected 45$ per carry on. Horseshit

DEN
STL
Mediocre 3.0

Disorganization with boarding process. Gate changes from that which was indicated on boarding pass, without notification. Expensive baggage/fees. No basic complimentary accommodations (snacks). Uncomfortable seats lacking ergonomic design and headrest. Small spaces for personal items.

DEN
STL
Okay 4.0

Same as above

Wed, May 9
DEN
STL
2h 07m
Wed, May 16
STL
DEN
2h 29m
Trip: 8 days
5.5OkayShow reviews
Overall 5.5 Okay
Based on 175 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
STL
Mediocre 3.0

Disorganization with boarding process. Gate changes from that which was indicated on boarding pass, without notification. Expensive baggage/fees. No basic complimentary accommodations (snacks). Uncomfortable seats lacking ergonomic design and headrest. Small spaces for personal items.

DEN
STL
Good 6.5

The tickets look like a deal until they charge for every other thing. The information regarding what bag can be carried on without a fee is very confusing. We paid and then saw people rolling cases and putting them in the overhead bin. The seat prices are ridiculous so you don't want to pay for a seat they will assign you for free, I was then told I had to go to the gate to get a seat assignment even though I had already purchased a ticket. I waited for almost an hour before someone showed up. I was told the only seats left were the exit rows. Luckily I am healthy. If I have paid for a ticket Frontier should guarantee me a seat. We had to wait in line even though we had already paid for our bags and some of us went on line and checked in and had boarding passes. Where is the short cut then?? It was so convoluted we will never fly Frontier again. Too much work, let me pay for the ticket and let me have a bag and give me a seat for crying out loud. The flight crew was great. Very nice.

DEN
STL
Mediocre 2.6

The price.

No complimentary snacks provided. Had to pay for food and beverages with credit/debit card so I didn’t even bother. Takeoff was the scariest experience of my life. The plane swerved side to side as we were taking off and was extremely shaky while ascending. I said hi to a flight attendant as I was waking to my seat and she just looked at me with a blank face. No friendly response or greeting whatsoever. The seat were incredibly stiff and you couldn’t tilt them back at all.

DEN
STL
Mediocre 2.0

Flight time was changed, and I wasn't notified, so I missed the flight.

DEN
STL
Mediocre 2.0

Unexpected 45$ per carry on. Horseshit

Sat, May 5
DEN
STL
2h 07m
Thu, May 17
STL
DEN
2h 21m
Trip: 13 days
Overall 0.0 Poor
Based on 0 reviews
Sat, May 5
DEN
STL
2h 07m
Thu, May 17
STL
DEN
2h 29m
Trip: 13 days
5.5OkayShow reviews
Overall 5.5 Okay
Based on 175 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
STL
Good 6.0

seats are worn out, you have to pay to place a bag in overhead compartments

DEN
STL
Okay 4.0

Same as above

DEN
STL
Mediocre 2.6

The price.

No complimentary snacks provided. Had to pay for food and beverages with credit/debit card so I didn’t even bother. Takeoff was the scariest experience of my life. The plane swerved side to side as we were taking off and was extremely shaky while ascending. I said hi to a flight attendant as I was waking to my seat and she just looked at me with a blank face. No friendly response or greeting whatsoever. The seat were incredibly stiff and you couldn’t tilt them back at all.

DEN
STL
Mediocre 3.0

Flight was abnormally bumpy to the point even the crew mentioned it. I could hear the crew the whole flight chatting and bitching about Work etc

DEN
STL
Excellent 8.0

Breckinridge whiskey

Bit cramped

Tue, May 8
DEN
STL
2h 07m
Sun, May 13
STL
DEN
2h 23m
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Tue, May 8
DEN
STL
2h 07m
Thu, May 17
STL
DEN
2h 29m
Trip: 10 days
5.5OkayShow reviews
Overall 5.5 Okay
Based on 175 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
STL
Mediocre 2.0

Unexpected 45$ per carry on. Horseshit

DEN
STL
Excellent 8.0

Breckinridge whiskey

Bit cramped

DEN
STL
Mediocre 3.0

Disorganization with boarding process. Gate changes from that which was indicated on boarding pass, without notification. Expensive baggage/fees. No basic complimentary accommodations (snacks). Uncomfortable seats lacking ergonomic design and headrest. Small spaces for personal items.

DEN
STL
Good 7.6

Crew was great! Got to St. Louis on time.

DEN
STL
Excellent 10.0

the crew was very entertaining which always helps make the trip more pleasant.

Too bumping of a flight. Not sure there was anything that could be done about that but I'm guessing a higher altitude may of helped but i am not a expert, just a nervous flier.

Wed, May 30
DEN
STL
2h 07m
Wed, Jun 6
STL
DEN
2h 21m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Wed, May 9
DEN
STL
2h 07m
Thu, May 17
STL
DEN
2h 29m
Trip: 9 days
5.5OkayShow reviews
Overall 5.5 Okay
Based on 175 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
STL
Mediocre 3.0

Flight was abnormally bumpy to the point even the crew mentioned it. I could hear the crew the whole flight chatting and bitching about Work etc

DEN
STL
Mediocre 2.0

Unexpected 45$ per carry on. Horseshit

DEN
STL
Mediocre 3.0

Disorganization with boarding process. Gate changes from that which was indicated on boarding pass, without notification. Expensive baggage/fees. No basic complimentary accommodations (snacks). Uncomfortable seats lacking ergonomic design and headrest. Small spaces for personal items.

DEN
STL
Mediocre 2.0

Flight time was changed, and I wasn't notified, so I missed the flight.

DEN
STL
Excellent 10.0

the crew was very entertaining which always helps make the trip more pleasant.

Too bumping of a flight. Not sure there was anything that could be done about that but I'm guessing a higher altitude may of helped but i am not a expert, just a nervous flier.

Tue, May 29
DEN
STL
2h 01m
Wed, Jun 6
STL
DEN
2h 21m
Trip: 9 days
6.9GoodShow reviews
Overall 6.9 Good
Based on 30 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
DEN
STL
Excellent 8.0

That the flight was earlier then Expected

Bag fee

DEN
STL
Okay 4.6

flight was on time

airport gate lady would't let me run to the bathroom and quickly return for my checked carry-on for "security reasons." Then I heard about 4-5 people being paged to come pick up their checked carry-on luggage.

DFW
ORD
Mediocre 2.0

the flight attendants and service were amazing and perfect. The green tea from All Nippon Airline was awesome.

All the food were terribly salty, inedible because the beef was hard like rock, I was unable to eat or chew. The sauce was salty and terrible so threw them away. In general, the food were inedible and poorly prepared that means they were not considerate and discreet about cooking, selecting material,too. The airline only pick the terribly cheap meat to scam and mistreat the passengers. I felt I was ripped off and sadden.

DEN
STL
Mediocre 3.0

It's 2.5 hours past our scheduled departure time and we're still sitting at the gate

DEN
STL
Excellent 10.0

Same as above. Did notice the woman staffing the counter at boarding having extreme patience with people's problems and non problems. She was great and deserves a raise. Denver gate B 85 between 1:00 and 3:00 6/15/16.

Thu, May 31
DEN
STL
2h 07m
Tue, Jun 5
STL
DEN
2h 21m
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Apr 28
DEN
STL
2h 12m
Tue, May 1
STL
DEN
2h 29m
Trip: 4 days
5.5OkayShow reviews
Overall 5.5 Okay
Based on 175 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
STL
Excellent 8.0

Breckinridge whiskey

Bit cramped

DEN
STL
Good 7.6

Crew was great! Got to St. Louis on time.

DEN
STL
Mediocre 3.0

Flight was abnormally bumpy to the point even the crew mentioned it. I could hear the crew the whole flight chatting and bitching about Work etc

DEN
STL
Excellent 10.0

the crew was very entertaining which always helps make the trip more pleasant.

Too bumping of a flight. Not sure there was anything that could be done about that but I'm guessing a higher altitude may of helped but i am not a expert, just a nervous flier.

DEN
STL
Mediocre 2.0

Unexpected 45$ per carry on. Horseshit

Sat, May 5
DEN
STL
2h 07m
Sat, May 12
STL
DEN
8h 18m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Thu, May 10
DEN
STL
2h 07m
Sun, May 13
STL
DEN
2h 28m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Fri, Apr 27
DEN
STL
2h 12m
Sun, Apr 29
STL
DEN
2h 28m
Trip: 3 days
5.5OkayShow reviews
Overall 5.5 Okay
Based on 175 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
DEN
STL
Good 6.0

seats are worn out, you have to pay to place a bag in overhead compartments

DEN
STL
Excellent 10.0

the crew was very entertaining which always helps make the trip more pleasant.

Too bumping of a flight. Not sure there was anything that could be done about that but I'm guessing a higher altitude may of helped but i am not a expert, just a nervous flier.

DEN
STL
Excellent 8.0

Breckinridge whiskey

Bit cramped

DEN
STL
Mediocre 2.0

Flight time was changed, and I wasn't notified, so I missed the flight.

DEN
STL
Okay 4.0

Almost. 8 hour delay, and was never told real reason. Was offered $10 lunch, and nothing else. I had to change my vacation plans because of delay! Not a happy customer!!!!

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.