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Aurora

$39+ 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — DEN
ene. 14 — ene. 211
mié. 1/14
mié. 1/21
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Aurora are usually found in October or January, booked 75 days in advance, depart on a Wednesday or Friday and return on a Friday

Cheap 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 diciembre 15, 2025.

This Super.com deal was found by Cheapflights users on 12/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/2210:10 pmSTL - DEN
1 stop6h 48mFrontier
lun. 1/56:50 amDEN - STL
Nonstop2h 12mFrontier
Deal found 12/14$163
This Expedia deal was found by Cheapflights users on 12/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/2210:10 pmSTL - DEN
1 stop11h 54mFrontier
lun. 12/2910:37 pmDEN - STL
1 stop21h 48mFrontier
Deal found 12/14$183
This Orbitz deal was found by Cheapflights users on 12/13. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/2010:10 pmSTL - DEN
1 stop11h 54mFrontier
lun. 12/2910:37 pmDEN - STL
1 stop21h 48mFrontier
Deal found 12/13$187
This Frontier deal was found by Cheapflights users on 12/15. 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.
mié. 12/317:43 pmSTL - DEN
Nonstop2h 32mFrontier
lun. 1/56:50 amDEN - STL
Nonstop2h 12mFrontier
Deal found 12/15$191
This Frontier deal was found by Cheapflights users on 12/14. 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.
vie. 12/198:42 pmSTL - DEN
1 stop13h 13mFrontier
sáb. 1/1711:40 amDEN - STL
Nonstop2h 08mFrontier
Deal found 12/14$195
This Frontier deal was found by Cheapflights users on 12/12. 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.
mié. 12/244:27 pmSTL - DEN
1 stop7h 37mFrontier
lun. 1/56:50 amDEN - STL
Nonstop2h 12mFrontier
Deal found 12/12$198
This Frontier deal was found by Cheapflights users on 12/14. 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.
vie. 12/198:42 pmSTL - DEN
1 stop13h 13mFrontier
vie. 1/163:26 pmDEN - STL
Nonstop2h 06mFrontier
Deal found 12/14$210
This Frontier deal was found by Cheapflights users on 12/13. 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.
lun. 12/2210:10 pmSTL - DEN
1 stop6h 48mFrontier
dom. 1/411:59 pmDEN - STL
1 stop7h 13mFrontier
Deal found 12/13$218

Find 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 diciembre 15, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$73
(Frontier)

One-way from

$39
(Kiwi.com)

Popular in

March

Cheapest in

October

Average price

$229
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. 9% potential increase in price ($25 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 December 2025
Search Deals

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 diciembre 15, 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

mié. 1/21

6:00 pm-7:38 pm

Nonstop2h 38m

Denver Intl

sáb. 1/24

10:10 am-1:16 pm

Nonstop2h 06m

$157

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

vie. 1/23

2:38 pm-7:29 pm

1 stop5h 51m

Denver Intl

vie. 1/23

12:30 am-8:53 am

1 stop7h 23m

$197

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

mié. 1/14

6:00 pm-7:38 pm

Nonstop2h 38m

Denver Intl

dom. 1/18

1:53 pm-4:55 pm

Nonstop2h 02m

$242

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

mié. 1/21

6:00 pm-7:38 pm

Nonstop2h 38m

Denver Intl

lun. 1/26

10:10 am-1:16 pm

Nonstop2h 06m

$247

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

lun. 1/12

4:15 pm-5:53 pm

Nonstop2h 38m

Denver Intl

mar. 1/13

7:50 am-2:30 pm

1 stop5h 40m

$260

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

lun. 2/9

4:15 pm-5:53 pm

Nonstop2h 38m

Denver Intl

jue. 2/12

5:25 pm-8:26 pm

Nonstop2h 01m

$262

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

vie. 1/9

8:45 am-10:21 am

Nonstop2h 36m

Denver Intl

jue. 1/15

1:53 pm-4:55 pm

Nonstop2h 02m

$270

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

sáb. 1/24

7:40 am-1:15 pm

2 stops6h 35m

Denver Intl

sáb. 1/31

8:05 am-5:00 pm

2 stops7h 55m

$287

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

lun. 1/5

7:40 am-9:05 am

Nonstop2h 25m

Denver Intl

vie. 1/9

7:00 am-10:15 am

Nonstop2h 15m

$292

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

mié. 1/21

8:45 am-10:21 am

Nonstop2h 36m

Denver Intl

mié. 1/21

5:50 pm-8:58 pm

Nonstop2h 08m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 21 results
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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 December 12, 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 diciembre 15, 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.

Weekly flight availability from St. Louis to Aurora

Explore weekly flight availability from St. Louis to Aurora. 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 diciembre 15, 2025.

The most flights from STL to 9UR are scheduled on a Monday (12 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 on average).

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 diciembre 15, 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
7.9
Good
4,250 reviews

Comfort

8.0

Overall

7.9

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Comfort

8.0

Overall

7.9

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,008 reviews
Southwest
7.9
Good
4,250 reviews

Comfort

8.0

Overall

7.9

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,092 reviews
Southwest
7.9
Good
4,250 reviews

Comfort

8.0

Overall

7.9

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,052 reviews
Southwest
7.9
Good
4,250 reviews

Comfort

8.0

Overall

7.9

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.8
Fair
3,080 reviews
Southwest
7.9
Good
4,250 reviews

Comfort

8.0

Overall

7.9

Food

7.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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 10 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 179 times in the past calendar month.

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

    Airlines like United Airlines and Delta fly from St. Louis to Aurora in about 2h 38m. The time it takes to get you to your destination can typically vary by up to 3h 13m. St. Louis and Aurora are separated by a distance of 767 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $30. However, be on the lookout for offers from Southwest and United Airlines, 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 (100%), Frontier (90%) or Air Canada (84%) 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 $1,027 for a flight from St. Louis to Aurora. The cheapest flight overall is $65 while the most popular route, (Lambert-St Louis - Denver Intl) is currently priced at $116.

  • 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

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Alternative routes for St. Louis to Aurora

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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 diciembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$50Average$125FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$334FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$157Average$374FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$176Average$332FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$201Average$299FlexibilityNo cancel feeOn-time71%

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