HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Aurora

$42+ Cheap flights from St. Louis (STL) to Aurora, CO

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — DEN
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Aurora with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Lambert-St Louis to Aurora are usually found in November or October, booked 75 days in advance, depart on a Wednesday or Friday and return on a Friday

Cheap flight deals from St. Louis to Aurora

Keep the following information in mind while searching for St. Louis to Aurora flight deals. Data was last updated October 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$70
(Mytrip)

One-way from

$42
(Priceline)

Popular in

March

Cheapest in

November

Average price

$175
Provider with most accurate pricing for Lambert-St Louis-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Denver Intl flights.
Search Deals
From Lambert-St Louis to Aurora
Search Deals
One-way flight from Lambert-St Louis to Aurora
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($27 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from St. Louis to Aurora

Cheapest flights from St. Louis to Aurora
Explore the most affordable flight options available from St. Louis to Aurora. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Mytrip deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/137:43 pmSTL - DEN
Nonstop2h 32mFrontier
Sat 12/206:50 amDEN - STL
Nonstop2h 12mFrontier
Deal found 10/28$70
This Frontier deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/812:07 pmSTL - DEN
1 stop13h 13mFrontier
Sat 12/137:05 amDEN - STL
Nonstop2h 09mFrontier
Deal found 10/30$82
This Flightnetwork deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/67:43 pmSTL - DEN
Nonstop2h 32mFrontier
Mon 12/811:59 pmDEN - STL
1 stop21h 34mFrontier
Deal found 10/29$83
This Cheapflightsfares deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/154:51 pmSTL - DEN
1 stop12h 08mFrontier
Tue 11/186:00 amDEN - STL
Nonstop2h 07mFrontier
Deal found 10/30$86
This Frontier deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/137:43 pmSTL - DEN
Nonstop2h 32mFrontier
Sat 1/36:50 amDEN - STL
Nonstop2h 12mFrontier
Deal found 10/29$87
This Frontier deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/87:43 pmSTL - DEN
Nonstop2h 32mFrontier
Wed 12/107:05 amDEN - STL
Nonstop2h 09mFrontier
Deal found 10/30$88
This Frontier deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/137:43 pmSTL - DEN
Nonstop2h 32mFrontier
Sat 12/1312:59 amDEN - STL
1 stop7h 48mFrontier
Deal found 10/30$91
This Priceline deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/187:45 pmSTL - DEN
Nonstop2h 28mFrontier
Wed 11/196:00 amDEN - STL
Nonstop2h 07mFrontier
Deal found 10/29$92
This Frontier deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1212:07 pmSTL - DEN
1 stop13h 13mFrontier
Sat 12/137:05 amDEN - STL
Nonstop2h 09mFrontier
Deal found 10/30$96
This Frontier deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/137:43 pmSTL - DEN
Nonstop2h 32mFrontier
Fri 1/26:50 amDEN - STL
Nonstop2h 12mFrontier
Deal found 10/29$97
This CheapOair deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:43 pmSTL - DEN
Nonstop2h 32mFrontier
Sat 12/137:33 amDEN - STL
1 stop27h 39mFrontier
Deal found 10/30$99
This Frontier deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/93:30 pmSTL - DEN
1 stop8h 34mFrontier
Sat 12/137:05 amDEN - STL
Nonstop2h 09mFrontier
Deal found 10/28$102

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Aurora 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 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from St. Louis to Aurora that are best for you.

Fly from

St. Louis

Fly to

Aurora

Route

Depart

Return

Price

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Wed 12/10

3:30 pm-11:04 pm

1 stop8h 34m

Denver Intl

Sat 12/13

7:05 am-10:14 am

Nonstop2h 09m

$82

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Thu 11/13

7:45 pm-9:13 pm

Nonstop2h 28m

Denver Intl

Mon 11/17

11:03 am-8:12 pm

1 stop8h 09m

$125

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Wed 1/21

5:11 pm-7:45 am

2 stops15h 34m

Denver Intl

Fri 1/23

6:50 am-10:02 am

Nonstop2h 12m

$140

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Thu 12/11

12:04 pm-9:38 pm

1 stop10h 34m

Denver Intl

Sun 12/14

10:44 pm-11:22 am

1 stop11h 38m

$144

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Wed 3/4

7:43 pm-9:15 pm

Nonstop2h 32m

Denver Intl

Mon 3/9

6:50 am-10:02 am

Nonstop2h 12m

$146

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Wed 2/18

5:44 pm-9:04 am

1 stop16h 20m

Denver Intl

Sun 2/22

1:00 pm-4:49 pm

1 stop26h 49m

$154

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Fri 11/14

11:05 am-11:16 pm

1 stop13h 11m

Denver Intl

Sun 11/16

12:16 am-1:17 pm

1 stop12h 01m

$171

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Wed 12/10

9:00 am-12:53 pm

1 stop4h 53m

Denver Intl

Fri 12/12

12:50 am-10:24 am

1 stop8h 34m

$177

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Wed 1/21

5:00 pm-10:36 pm

1 stop6h 36m

Denver Intl

Thu 1/22

12:30 am-8:53 am

1 stop7h 23m

$182

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Thu 11/13

11:07 am-10:29 pm

2 stops12h 22m

Denver Intl

Tue 11/18

6:00 am-9:07 am

Nonstop2h 07m

$185

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 22 results
1
2
3

Best time to book a flight from St. Louis to Aurora

Have a flexible travel schedule? Discover the best time to fly to Aurora from St. Louis 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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Aurora

How far ahead should I book a flight from St. Louis to Aurora?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Aurora. Price data was last updated on October 24, 2025.

The price you pay for your flight from St. Louis to Aurora may vary depending on when you book. For the best chance of a lower fare, look to book 75 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from St. Louis to Aurora?

Currently, February is the cheapest month in which you can book a flight from St. Louis to Aurora (average of $36). Flying from St. Louis to Aurora in July is currently the most expensive (average of $104). 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.

What is the cheapest time of day to fly from STL to 9UR?

Find hourly flight availability from St. Louis to Aurora. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

It’s optimal to fly from St. Louis to Aurora in the evening. By choosing this option you can save up to 35% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from St. Louis to Aurora?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Aurora. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their St. Louis to Aurora flight should consider departing on Saturday evenings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Aurora

Get insights into the airlines that provide service to Aurora. 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 Aurora. Reviews last updated October 30, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from St. Louis to Aurora have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
7.9
Good
7,998 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,998 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
11,035 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.8
Fair
3,122 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Aurora. 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 St. Louis to Aurora?

    If you book a flight to Aurora from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 4 flights from Lambert-St Louis to Aurora per day from 5 different airlines.

  • How popular is this St. Louis to Aurora flight route?

    Flights from Lambert-St Louis to Aurora have been viewed 184 times in the past calendar month.

  • How long is the flight from St. Louis to Aurora?

    Airlines like Frontier fly from St. Louis to Aurora in about 8h 34m. The time it takes to get you to your destination can typically vary by up to . St. Louis and Aurora are separated by a distance of 767 mi.

  • What are the cheapest airlines to fly from St. Louis to Aurora one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $59. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from St. Louis to Aurora for a low price.

  • What are the most reliable airlines from St. Louis to Aurora?

    Consider SkyWest Airlines (90%), Frontier (83%) or Air Canada (78%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Aurora.

  • What are the cheapest flights from St. Louis to Aurora?

    On average you can expect to pay $756 for a flight from St. Louis to Aurora. The cheapest flight overall is $51 while the most popular route, (Lambert-St Louis - Denver Intl) is currently priced at $118.

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

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

  • How can I find direct flights from St. Louis to Aurora?

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

  • Can I find deals for business class flights from St. Louis to Aurora?

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

  • What is the cheapest month to book a flight from St. Louis to Aurora?

    Currently, February is the cheapest month in which you can book a flight from St. Louis to Aurora (average of $36). Flying from St. Louis to Aurora in July is currently the most expensive (average of $104). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Aurora

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Denver flights
St. Louis to Denver flights
Springfield to Denver flights
St. Louis to Colorado Springs flights
Columbia to Denver flights
Joplin to Denver flights
Kansas City to Colorado Springs flights
Springfield to Colorado Springs flights
St. Louis to Hayden flights
Kansas City to Grand Junction flights
Kansas City to Durango flights
St. Louis to Montrose flights
St. Louis to Aspen flights
St. Louis to Vail flights
St. Louis to Grand Junction flights
St. Louis to Gunnison flights
St. Louis to Durango flights
Kansas City to Aspen flights
Kansas City to Hayden flights
Columbia to Colorado Springs flights
Joplin to Colorado Springs flights
Columbia to Aspen flights
Springfield to Hayden flights
Branson to Denver flights
Kansas City to Cortez flights
Kansas City to Alamosa flights
St. Louis to Cortez flights
Cape Girardeau to Denver flights

Top 5 airlines flying from St. Louis to Aurora

Discover the top 5 airlines that operate flights from St. Louis to Aurora. 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 2,558,603 searches. Data last updated October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$50Average$124FlexibilityNo cancel feeOn-time62%
DeltaCheapest$108Average$329FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$155Average$373FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$177Average$333FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$201Average$305FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.