$65+ 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 7/22. Fares are subject to change and may not be available on all flights or dates of travel.
STL — DEN
Jul 27 — Aug 31
Round-trip
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 35 days in advance, depart on a Saturday or Wednesday 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 June 27, 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 June 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/26. 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.
Tue 10/138:10 pm
STL
- DEN
Nonstop2h 39m
Frontier
Sat 10/244:12 pm
DEN
- STL
Nonstop2h 03m
Frontier
Deal found 6/26![Frontier logo]()
$162
This Cheapflightsfares deal was found by Cheapflights users on 6/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Tue 7/284:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/26![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 6/24. 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.
Tue 8/48:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Tue 8/114:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/24![Frontier logo]()
$167
This Cheapflightsfares deal was found by Cheapflights users on 6/24. 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 8/128:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Mon 8/174:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/24![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 6/22. 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.
Thu 8/68:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Wed 8/124:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/22![Frontier logo]()
$169
This Frontier deal was found by Cheapflights users on 6/23. 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 8/48:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Thu 8/134:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/23![Frontier logo]()
$170
This Frontier deal was found by Cheapflights users on 6/25. 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 8/18:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Wed 8/54:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/25![Frontier logo]()
$171
This Cheapflightsfares deal was found by Cheapflights users on 6/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/58:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Sat 8/84:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/26![Frontier logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 8/34:57 pm
STL
- DEN
1 stop17h 06m
Frontier
Tue 8/114:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/22![Frontier logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/188:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Tue 7/216:30 am
DEN
- STL
1 stop10h 07m
Frontier
Deal found 6/24![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 10/178:10 pm
STL
- DEN
Nonstop2h 39m
Frontier
Tue 10/206:30 am
DEN
- STL
1 stop26h 10m
Frontier
Deal found 6/25![Frontier logo]()
$181
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 June 27, 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 June 27, 2026.
This Delta deal was found by Cheapflights users on 6/24. 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.
Tue 9/112:52 pm
STL
- DEN
1 stop8h 00m
Delta
Sat 9/512:54 pm
DEN
- STL
1 stop7h 06m
Delta
Deal found 6/24![Delta logo]()
$225
This United Airlines deal was found by Cheapflights users on 6/24. 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.
Sat 9/194:40 pm
STL
- DEN
Nonstop2h 30m
United Airlines
Thu 9/245:30 pm
DEN
- STL
Nonstop2h 06m
United Airlines
Deal found 6/24![United Airlines logo]()
$259
This Southwest deal was found by Cheapflights users on 6/22. 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 8/128:50 pm
STL
- DEN
Nonstop2h 15m
Southwest
Mon 8/173:15 pm
DEN
- STL
2 stops5h 50m
Southwest
Deal found 6/22![Southwest logo]()
$274
This United Airlines deal was found by Cheapflights users on 6/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/181:36 pm
STL
- DEN
Nonstop2h 24m
United Airlines
Wed 8/191:27 pm
DEN
- STL
Nonstop2h 07m
United Airlines
Deal found 6/26![United Airlines logo]()
$285
This Southwest deal was found by Cheapflights users on 6/24. 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.
Sun 9/138:45 pm
STL
- DEN
Nonstop2h 15m
Southwest
Sat 9/197:35 am
DEN
- STL
Nonstop2h 00m
Southwest
Deal found 6/24![Southwest logo]()
$286
This United Airlines deal was found by Cheapflights users on 6/22. 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.
Sat 9/54:40 pm
STL
- DEN
Nonstop2h 30m
United Airlines
Sun 9/135:32 pm
DEN
- STL
Nonstop2h 06m
United Airlines
Deal found 6/22![United Airlines logo]()
$286
This United Airlines deal was found by Cheapflights users on 6/24. 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.
Tue 9/224:40 pm
STL
- DEN
Nonstop2h 30m
United Airlines
Wed 9/232:50 pm
DEN
- STL
1 stop7h 09m
United Airlines
Deal found 6/24![United Airlines logo]()
$295
This Southwest deal was found by Cheapflights users on 6/22. 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 8/85:20 pm
STL
- DEN
Nonstop2h 15m
Southwest
Mon 8/107:00 am
DEN
- STL
Nonstop2h 00m
Southwest
Deal found 6/22![Southwest logo]()
$340
This Southwest deal was found by Cheapflights users on 6/25. 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.
Thu 9/108:30 am
STL
- DEN
1 stop3h 30m
Southwest
Sun 9/138:25 am
DEN
- STL
1 stop5h 15m
Southwest
Deal found 6/25![Southwest logo]()
$355
This Southwest deal was found by Cheapflights users on 6/25. 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.
Fri 7/317:10 pm
STL
- DEN
1 stop4h 50m
Southwest
Tue 8/411:15 am
DEN
- STL
2 stops5h 40m
Southwest
Deal found 6/25![Southwest logo]()
$365
This United Airlines deal was found by Cheapflights users on 6/25. 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.
Sun 8/239:00 am
STL
- DEN
Nonstop2h 31m
United Airlines
Tue 8/251:27 pm
DEN
- STL
Nonstop2h 07m
United Airlines
Deal found 6/25![United Airlines logo]()
$366
This Southwest deal was found by Cheapflights users on 6/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/2410:35 pm
STL
- DEN
Nonstop2h 20m
Southwest
Sun 7/268:45 pm
DEN
- STL
Nonstop2h 10m
Southwest
Deal found 6/26![Southwest logo]()
$367
Last-minute flights from St. Louis to AuroraDiscover last-minute flight deals from St. Louis to Aurora. Data last updated June 27, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Aurora. Data last updated June 27, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 6/22. 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 7/148:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Wed 7/2210:00 am
DEN
- STL
1 stop7h 05m
Frontier
Deal found 6/22![Frontier logo]()
$197
This Super.com deal was found by Cheapflights users on 6/25. 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.
Wed 7/158:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Wed 7/294:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/25![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/188:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Tue 7/216:30 am
DEN
- STL
1 stop10h 07m
Frontier
Deal found 6/24![Frontier logo]()
$180
This Super.com deal was found by Cheapflights users on 6/24. 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 7/188:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Mon 7/204:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/24![Frontier logo]()
$194
This Cheapflightsfares deal was found by Cheapflights users on 6/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Tue 7/284:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/26![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 6/23. 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.
Tue 7/218:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Sun 7/264:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/23![Frontier logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/228:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Tue 7/2811:46 pm
DEN
- STL
1 stop8h 11m
Frontier
Deal found 6/22![Frontier logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/228:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Sun 8/94:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/24![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 6/26. 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.
Tue 7/288:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Sat 8/111:59 pm
DEN
- STL
1 stop16h 38m
Frontier
Deal found 6/26![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/314:57 pm
STL
- DEN
1 stop17h 06m
Frontier
Sat 8/14:10 pm
DEN
- STL
Nonstop2h 13m
Frontier
Deal found 6/23![Frontier logo]()
$181
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 June 27, 2026.
Search for one-way flight options from St. Louis to Aurora. Find affordable one-way fares based on user searches. Data last updated June 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/26. 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.
Wed 7/228:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Deal found 6/26![Frontier logo]()
$65
This United Airlines deal was found by Cheapflights users on 6/25. 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.
Tue 8/254:40 pm
STL
- DEN
Nonstop2h 30m
United Airlines
Deal found 6/25![United Airlines logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 6/24. 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.
Tue 9/2210:35 am
STL
- DEN
1 stop12h 58m
Frontier
Deal found 6/24![Frontier logo]()
$104
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 8/178:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Deal found 6/24![Frontier logo]()
$109
This Cheapflightsfares deal was found by Cheapflights users on 6/25. 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 8/18:08 pm
STL
- DEN
Nonstop2h 36m
Frontier
Deal found 6/25![Frontier logo]()
$111
This Frontier deal was found by Cheapflights users on 6/24. 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 9/218:10 pm
STL
- DEN
Nonstop2h 39m
Frontier
Deal found 6/24![Frontier logo]()
$112
This Delta deal was found by Cheapflights users on 6/22. 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.
Tue 7/216:21 am
STL
- DEN
1 stop4h 42m
Delta
Deal found 6/22![Delta logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 8/217:58 pm
STL
- DEN
Nonstop2h 27m
Frontier
Deal found 6/22![Frontier logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/204:57 pm
STL
- DEN
1 stop17h 06m
Frontier
Deal found 6/23![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 9/2510:35 am
STL
- DEN
1 stop23h 56m
Frontier
Deal found 6/24![Frontier logo]()
$120
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 June 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $162 (Kiwi.com) |
One-way from | $65 (Kiwi.com) |
Popular in | June |
Cheapest in | October |
Average price | $338 |
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 June 27, 2026.
Use the filters below to find and compare flights from St. Louis to Aurora that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Tue 9/1
12:52 pm-7:52 pm
1 stop8h 00m
Denver Intl
Sat 9/5
12:54 pm-9:00 pm
1 stop7h 06m
$225
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Sat 9/19
4:40 pm-6:10 pm
Nonstop2h 30m
Denver Intl
Thu 9/24
5:30 pm-8:36 pm
Nonstop2h 06m
$259
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Wed 8/12
8:50 pm-10:05 pm
Nonstop2h 15m
Denver Intl
Mon 8/17
3:15 pm-10:05 pm
2 stops5h 50m
$274
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Tue 8/18
1:36 pm-3:00 pm
Nonstop2h 24m
Denver Intl
Wed 8/19
1:27 pm-4:34 pm
Nonstop2h 07m
$285
Quickest round-trip
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Sun 9/13
8:45 pm-10:00 pm
Nonstop2h 15m
Denver Intl
Sat 9/19
7:35 am-10:35 am
Nonstop2h 00m
$286
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Sat 9/5
4:40 pm-6:10 pm
Nonstop2h 30m
Denver Intl
Sun 9/13
5:32 pm-8:38 pm
Nonstop2h 06m
$286
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Tue 9/22
4:40 pm-6:10 pm
Nonstop2h 30m
Denver Intl
Wed 9/23
2:50 pm-10:59 pm
1 stop7h 09m
$295
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Sat 8/8
5:20 pm-6:35 pm
Nonstop2h 15m
Denver Intl
Mon 8/10
7:00 am-10:00 am
Nonstop2h 00m
$340
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Thu 9/10
8:30 am-11:00 am
1 stop3h 30m
Denver Intl
Sun 9/13
8:25 am-2:40 pm
1 stop5h 15m
$355
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Fri 7/31
7:10 pm-11:00 pm
1 stop4h 50m
Denver Intl
Tue 8/4
11:15 am-5:55 pm
2 stops5h 40m
$365
Showing 1-10 of 20 resultsSorted by cheapest first
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
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 June 27, 2026.
It’s optimal to fly from St. Louis to Aurora in the evening. By choosing this option you can save up to 52% on the cost of your flight, compared to a flight in the morning.
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 June 27, 2026.
The most flights from STL to 9UR are scheduled on a Friday (16 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 on average).
How much does it cost to fly round-trip from St. Louis to Aurora?
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 June 20, 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.
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 June 27, 2026.
See what other customers who have flown with Southwest,United Airlines, andFrontier 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.
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
7.9
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
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Complete your trip
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St. Louis and Aurora flights
Browse other St. Louis and Aurora flight options. Last updated on June 27, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on June 27, 2026.
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St. Louis to Aurora flights
Consider these flights traveling from St. Louis to Aurora.
Top 4 airlines flying from St. Louis to Aurora
Discover the top 4 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 June 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$56 | Average$149 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$158 | Average$406 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$166 | Average$341 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$167 | Average$365 | FlexibilityNo cancel fee | On-time69% |