$23+ 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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — DEN
Mar 1 — Mar 81
1 adult, Economy
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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 October or September, 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
Best
Last-minute
One-way
Cheapest flights from St. Louis to AuroraExplore 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 January 30, 2026.
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 January 30, 2026.
This Frontier deal was found by Cheapflights users on 1/26. 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 2/73:46 pm
STL
- DEN
Nonstop2h 37m
Frontier
Wed 2/1110:50 am
DEN
- STL
Nonstop2h 08m
Frontier
Deal found 1/26![Frontier logo]()
$68
This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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.
Wed 2/254:51 pm
STL
- DEN
Nonstop2h 34m
Frontier
Sat 2/2810:48 am
DEN
- STL
Nonstop2h 08m
Frontier
Deal found 1/27![Frontier logo]()
$72
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/118:12 pm
STL
- DEN
Nonstop2h 37m
Frontier
Sat 3/146:35 am
DEN
- STL
Nonstop2h 14m
Frontier
Deal found 1/29![Frontier logo]()
$79
This Frontier deal was found by Cheapflights users on 1/27. 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 2/212:51 pm
STL
- DEN
Nonstop2h 27m
Frontier
Mon 2/2310:01 am
DEN
- STL
Nonstop2h 08m
Frontier
Deal found 1/27![Frontier logo]()
$80
This Super.com deal was found by Cheapflights users on 1/28. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/218:12 pm
STL
- DEN
Nonstop2h 37m
Frontier
Wed 3/256:35 am
DEN
- STL
Nonstop2h 14m
Frontier
Deal found 1/28![Frontier logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/282:51 pm
STL
- DEN
Nonstop2h 27m
Frontier
Tue 3/31:42 pm
DEN
- STL
1 stop16h 09m
Frontier
Deal found 1/28![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/45:18 pm
STL
- DEN
Nonstop2h 35m
Frontier
Tue 3/1011:59 pm
DEN
- STL
1 stop9h 38m
Frontier
Deal found 1/29![Frontier logo]()
$87
This Frontier deal was found by Cheapflights users on 1/29. 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 4/48:16 pm
STL
- DEN
Nonstop2h 33m
Frontier
Wed 4/86:40 am
DEN
- STL
Nonstop2h 08m
Frontier
Deal found 1/29![Frontier logo]()
$88
This Frontier deal was found by Cheapflights users on 1/27. 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 3/168:12 pm
STL
- DEN
Nonstop2h 37m
Frontier
Mon 3/236:35 am
DEN
- STL
Nonstop2h 14m
Frontier
Deal found 1/27![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/218:12 pm
STL
- DEN
Nonstop2h 37m
Frontier
Sat 3/286:35 am
DEN
- STL
Nonstop2h 14m
Frontier
Deal found 1/28![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/812:03 pm
STL
- DEN
Nonstop2h 33m
Frontier
Fri 2/1310:01 am
DEN
- STL
Nonstop2h 08m
Frontier
Deal found 1/27![Frontier logo]()
$93
This Frontier deal was found by Cheapflights users on 1/27. 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 3/288:12 pm
STL
- DEN
Nonstop2h 37m
Frontier
Sat 4/46:40 am
DEN
- STL
Nonstop2h 08m
Frontier
Deal found 1/27![Frontier logo]()
$94
Best flights from St. Louis to AuroraDiscover carefully curated flight deals from St. Louis to Aurora that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 30, 2026.
Discover carefully curated flight deals from St. Louis to Aurora that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 30, 2026.
This Southwest deal was found by Cheapflights users on 1/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/285:45 am
STL
- DEN
Nonstop2h 30m
Southwest
Mon 3/26:15 am
DEN
- STL
Nonstop2h 15m
Southwest
Deal found 1/28![Southwest logo]()
$177
This Delta deal was found by Cheapflights users on 1/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/77:00 am
STL
- DEN
1 stop6h 00m
Delta
Mon 3/96:15 pm
DEN
- STL
1 stop5h 06m
Delta
Deal found 1/29![Delta logo]()
$197
This United Airlines deal was found by Cheapflights users on 1/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/185:15 am
STL
- DEN
Nonstop2h 40m
United Airlines
Wed 3/188:20 pm
DEN
- STL
Nonstop2h 14m
United Airlines
Deal found 1/28![United Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 1/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/66:47 pm
STL
- DEN
1 stop6h 36m
Delta
Mon 3/94:00 pm
DEN
- STL
1 stop7h 21m
Delta
Deal found 1/29![Delta logo]()
$217
This United Airlines deal was found by Cheapflights users on 1/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/99:00 am
STL
- DEN
Nonstop2h 35m
United Airlines
Tue 3/108:20 pm
DEN
- STL
Nonstop2h 14m
United Airlines
Deal found 1/27![United Airlines logo]()
$232
This Southwest deal was found by Cheapflights users on 1/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/116:20 am
STL
- DEN
Nonstop2h 30m
Southwest
Sat 2/149:25 am
DEN
- STL
Nonstop2h 05m
Southwest
Deal found 1/29![Southwest logo]()
$257
This United Airlines deal was found by Cheapflights users on 1/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/46:00 pm
STL
- DEN
Nonstop2h 34m
United Airlines
Sun 3/85:40 pm
DEN
- STL
Nonstop2h 05m
United Airlines
Deal found 1/27![United Airlines logo]()
$241
This Delta deal was found by Cheapflights users on 1/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/66:47 pm
STL
- DEN
1 stop6h 36m
Delta
Thu 3/124:00 pm
DEN
- STL
1 stop7h 21m
Delta
Deal found 1/29![Delta logo]()
$270
This United Airlines deal was found by Cheapflights users on 1/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/192:50 pm
STL
- DEN
Nonstop2h 36m
United Airlines
Wed 3/258:20 pm
DEN
- STL
Nonstop2h 14m
United Airlines
Deal found 1/27![United Airlines logo]()
$261
This Delta deal was found by Cheapflights users on 1/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/147:00 am
STL
- DEN
1 stop6h 00m
Delta
Sat 2/145:49 pm
DEN
- STL
1 stop4h 34m
Delta
Deal found 1/29![Delta logo]()
$277
Last-minute flights from St. Louis to AuroraDiscover last-minute flight deals from St. Louis to Aurora. Data last updated January 30, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Aurora. Data last updated January 30, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 1/26. 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 2/73:46 pm
STL
- DEN
Nonstop2h 37m
Frontier
Wed 2/1110:50 am
DEN
- STL
Nonstop2h 08m
Frontier
Deal found 1/26![Frontier logo]()
$68
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/812:03 pm
STL
- DEN
Nonstop2h 33m
Frontier
Fri 2/1310:01 am
DEN
- STL
Nonstop2h 08m
Frontier
Deal found 1/27![Frontier logo]()
$93
This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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 2/142:51 pm
STL
- DEN
Nonstop2h 27m
Frontier
Wed 2/1812:48 pm
DEN
- STL
Nonstop2h 05m
Frontier
Deal found 1/27![Frontier logo]()
$107
This Cheapflightsfares deal was found by Cheapflights users on 1/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:17 pm
STL
- DEN
1 stop12h 22m
Frontier
Mon 2/2310:01 am
DEN
- STL
Nonstop2h 08m
Frontier
Deal found 1/29![Frontier logo]()
$103
This Frontier deal was found by Cheapflights users on 1/27. 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 2/212:51 pm
STL
- DEN
Nonstop2h 27m
Frontier
Mon 2/2310:01 am
DEN
- STL
Nonstop2h 08m
Frontier
Deal found 1/27![Frontier logo]()
$80
This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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.
Wed 2/254:51 pm
STL
- DEN
Nonstop2h 34m
Frontier
Sat 2/2810:48 am
DEN
- STL
Nonstop2h 08m
Frontier
Deal found 1/27![Frontier logo]()
$72
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/278:22 pm
STL
- DEN
1 stop26h 13m
Frontier
Mon 3/210:01 am
DEN
- STL
Nonstop2h 08m
Frontier
Deal found 1/29![Frontier logo]()
$106
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/282:51 pm
STL
- DEN
Nonstop2h 27m
Frontier
Tue 3/31:42 pm
DEN
- STL
1 stop16h 09m
Frontier
Deal found 1/28![Frontier logo]()
$86
This Frontier deal was found by Cheapflights users on 1/28. 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.
Sat 2/282:51 pm
STL
- DEN
Nonstop2h 27m
Frontier
Mon 3/211:59 pm
DEN
- STL
1 stop21h 28m
Frontier
Deal found 1/28![Frontier logo]()
$98
One-way flights from St. Louis to AuroraSearch for one-way flight options from St. Louis to Aurora. Find affordable one-way fares based on user searches. Data last updated January 30, 2026.
Search for one-way flight options from St. Louis to Aurora. Find affordable one-way fares based on user searches. Data last updated January 30, 2026.
This Priceline deal was found by Cheapflights users on 1/29. 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.
Sat 2/282:51 pm
STL
- DEN
Nonstop2h 27m
Frontier
Deal found 1/29![Frontier logo]()
$23
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/73:46 pm
STL
- DEN
Nonstop2h 37m
Frontier
Deal found 1/26![Frontier logo]()
$33
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/254:51 pm
STL
- DEN
Nonstop2h 34m
Frontier
Deal found 1/27![Frontier logo]()
$36
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/212:51 pm
STL
- DEN
Nonstop2h 27m
Frontier
Deal found 1/27![Frontier logo]()
$39
This Super.com deal was found by Cheapflights users on 1/27. 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.
Fri 3/68:12 pm
STL
- DEN
Nonstop2h 37m
Frontier
Deal found 1/27![Frontier logo]()
$40
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/48:16 pm
STL
- DEN
Nonstop2h 33m
Frontier
Deal found 1/28![Frontier logo]()
$43
This Expedia deal was found by Cheapflights users on 1/27. 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.
Sat 3/218:12 pm
STL
- DEN
Nonstop2h 37m
Frontier
Deal found 1/27![Frontier logo]()
$44
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/208:12 pm
STL
- DEN
Nonstop2h 37m
Frontier
Deal found 1/27![Frontier logo]()
$48
This Expedia deal was found by Cheapflights users on 1/27. 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.
Mon 3/308:12 pm
STL
- DEN
Nonstop2h 37m
Frontier
Deal found 1/27![Frontier logo]()
$49
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/161:54 pm
STL
- DEN
Nonstop2h 36m
Frontier
Deal found 1/27![Frontier logo]()
$53
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/28:22 pm
STL
- DEN
1 stop16h 34m
Frontier
Deal found 1/28![Frontier logo]()
$61
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 January 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $68 (Super.com) |
One-way from | $23 (Priceline) |
Popular in | March |
Cheapest in | October |
Average price | $198 |
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 January 30, 2026.
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
Sat 2/28
5:45 am-7:15 am
Nonstop2h 30m
Denver Intl
Mon 3/2
6:15 am-9:30 am
Nonstop2h 15m
$177
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Sat 3/7
7:00 am-12:00 pm
1 stop6h 00m
Denver Intl
Mon 3/9
6:15 pm-12:21 am
1 stop5h 06m
$197
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Wed 3/18
5:15 am-6:55 am
Nonstop2h 40m
Denver Intl
Wed 3/18
8:20 pm-11:34 pm
Nonstop2h 14m
$197
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Fri 3/6
6:47 pm-12:23 am
1 stop6h 36m
Denver Intl
Mon 3/9
4:00 pm-12:21 am
1 stop7h 21m
$217
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Mon 3/9
9:00 am-10:35 am
Nonstop2h 35m
Denver Intl
Tue 3/10
8:20 pm-11:34 pm
Nonstop2h 14m
$232
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Wed 3/4
6:00 pm-7:34 pm
Nonstop2h 34m
Denver Intl
Sun 3/8
5:40 pm-8:45 pm
Nonstop2h 05m
$241
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Wed 2/11
6:20 am-7:50 am
Nonstop2h 30m
Denver Intl
Sat 2/14
9:25 am-12:30 pm
Nonstop2h 05m
$257
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Thu 3/19
2:50 pm-4:26 pm
Nonstop2h 36m
Denver Intl
Wed 3/25
8:20 pm-11:34 pm
Nonstop2h 14m
$261
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Fri 3/6
6:47 pm-12:23 am
1 stop6h 36m
Denver Intl
Thu 3/12
4:00 pm-12:21 am
1 stop7h 21m
$270
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Sat 2/14
7:00 am-12:00 pm
1 stop6h 00m
Denver Intl
Sat 2/14
5:49 pm-11:23 pm
1 stop4h 34m
$277
Showing 1-10 of 21 results
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.
STL-DEN
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
STL-9UR
STL-DEN
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 January 23, 2026.
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 $42). 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 January 30, 2026.
It’s optimal to fly from St. Louis to Aurora in the evening. By choosing this option you can save up to 61% on the cost of your flight, compared to a flight at noon.
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 January 24, 2026.
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. Sunday 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 January 30, 2026.
The most flights from STL to 9UR are scheduled on a Wednesday (12 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 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 January 30, 2026.
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.
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
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Alternative routes for St. Louis to Aurora
See prices for flight routes from nearby airports that may be better suited for you.
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 January 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$49 | Average$125 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$108 | Average$308 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$153 | Average$374 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$176 | Average$333 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$201 | Average$300 | FlexibilityNo cancel fee | On-time71% |