$77+ Cheap flights from Sky Harbor Intl (PHX) to St. Charles, MO
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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — STL
ago. 29 — sep. 51
Round-trip
1 adult, Economy
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Find cheap flights from Sky Harbor Intl to St. Charles 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 Phoenix Sky Harbor Intl to St. Charles are usually found in October or January, booked 10 days in advance, depart on a Friday or Saturday and return on a Wednesday
Cheap flight deals from Sky Harbor Intl to St. Charles
Cheapest
Best
Last-minute
One-way
Cheapest flights from Sky Harbor Intl to St. CharlesExplore the most affordable flight options available from Sky Harbor Intl to St. Charles. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 30, 2026.
Explore the most affordable flight options available from Sky Harbor Intl to St. Charles. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
mié. 9/239:15 am
PHX
- STL
1 stop8h 02m
Frontier
mar. 10/208:10 pm
STL
- PHX
1 stop13h 01m
Frontier
Deal found 7/28![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/169:15 am
PHX
- STL
1 stop8h 02m
Frontier
mié. 9/238:10 pm
STL
- PHX
1 stop13h 50m
Frontier
Deal found 7/30![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/22:15 pm
PHX
- STL
1 stop26h 58m
Frontier
mié. 9/98:10 pm
STL
- PHX
1 stop13h 50m
Frontier
Deal found 7/30![Frontier logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/1411:29 am
PHX
- STL
1 stop5h 48m
Frontier
mié. 9/168:10 pm
STL
- PHX
1 stop13h 50m
Frontier
Deal found 7/30![Frontier logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/118:56 pm
PHX
- STL
1 stop20h 21m
Frontier
lun. 9/148:10 pm
STL
- PHX
1 stop13h 50m
Frontier
Deal found 7/30![Frontier logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/118:56 pm
PHX
- STL
1 stop20h 21m
Frontier
dom. 9/131:02 pm
STL
- PHX
1 stop8h 49m
Frontier
Deal found 7/30![Frontier logo]()
$192
Best flights from Sky Harbor Intl to St. CharlesDiscover carefully curated flight deals from Sky Harbor Intl to St. Charles that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated julio 30, 2026.
Discover carefully curated flight deals from Sky Harbor Intl to St. Charles that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated julio 30, 2026.
This Southwest deal was found by Cheapflights users on 7/29. 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.
mié. 9/165:40 pm
PHX
- STL
Nonstop3h 00m
Southwest
mié. 9/235:35 am
STL
- PHX
1 stop6h 20m
Southwest
Deal found 7/29![Southwest logo]()
$349
This Southwest deal was found by Cheapflights users on 7/25. 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.
sáb. 8/153:25 pm
PHX
- STL
Nonstop2h 55m
Southwest
mar. 8/188:45 pm
STL
- PHX
Nonstop3h 10m
Southwest
Deal found 7/25![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 7/29. 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.
jue. 8/277:25 am
PHX
- STL
Nonstop2h 55m
Southwest
lun. 8/316:00 am
STL
- PHX
Nonstop3h 15m
Southwest
Deal found 7/29![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 7/26. 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.
jue. 9/36:55 pm
PHX
- STL
Nonstop3h 00m
Southwest
lun. 9/76:00 am
STL
- PHX
Nonstop3h 15m
Southwest
Deal found 7/26![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 7/28. 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.
sáb. 9/195:25 pm
PHX
- STL
Nonstop3h 00m
Southwest
sáb. 9/2611:50 am
STL
- PHX
Nonstop3h 10m
Southwest
Deal found 7/28![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 7/28. 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.
mar. 9/1510:45 am
PHX
- STL
1 stop5h 10m
Southwest
sáb. 9/194:00 pm
STL
- PHX
Nonstop3h 15m
Southwest
Deal found 7/28![Southwest logo]()
$356
This Southwest deal was found by Cheapflights users on 7/25. 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.
vie. 9/111:30 pm
PHX
- STL
Nonstop2h 50m
Southwest
sáb. 9/122:15 pm
STL
- PHX
Nonstop3h 15m
Southwest
Deal found 7/25![Southwest logo]()
$358
This Southwest deal was found by Cheapflights users on 7/26. 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.
jue. 8/205:00 am
PHX
- STL
Nonstop2h 50m
Southwest
lun. 8/242:20 pm
STL
- PHX
1 stop4h 30m
Southwest
Deal found 7/26![Southwest logo]()
$359
This Southwest deal was found by Cheapflights users on 7/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/268:25 pm
PHX
- STL
Nonstop2h 50m
Southwest
mar. 10/2712:25 pm
STL
- PHX
1 stop6h 15m
Southwest
Deal found 7/27![Southwest logo]()
$363
This Southwest deal was found by Cheapflights users on 7/26. 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.
sáb. 9/57:25 am
PHX
- STL
2 stops6h 10m
Southwest
mar. 9/82:45 pm
STL
- PHX
2 stops6h 10m
Southwest
Deal found 7/26![Southwest logo]()
$383
This Southwest deal was found by Cheapflights users on 7/29. 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.
mié. 12/235:45 am
PHX
- STL
Nonstop2h 45m
Southwest
mar. 12/299:50 pm
STL
- PHX
Nonstop3h 25m
Southwest
Deal found 7/29![Southwest logo]()
$402
Last-minute flights from Sky Harbor Intl to St. CharlesDiscover last-minute flight deals from Sky Harbor Intl to St. Charles. Data last updated julio 30, 2026 and is based on user searches.
Discover last-minute flight deals from Sky Harbor Intl to St. Charles. Data last updated julio 30, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/25. 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.
sáb. 8/156:24 am
PHX
- STL
1 stop6h 32m
Frontier
lun. 8/178:08 pm
STL
- PHX
1 stop19h 09m
Frontier
Deal found 7/25![Frontier logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
lun. 8/174:39 pm
PHX
- STL
1 stop21h 37m
Frontier
jue. 8/207:58 pm
STL
- PHX
1 stop5h 41m
Frontier
Deal found 7/26![Frontier logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
jue. 8/206:35 am
PHX
- STL
1 stop10h 38m
Frontier
dom. 8/237:58 pm
STL
- PHX
1 stop16h 13m
Frontier
Deal found 7/29![Frontier logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
jue. 8/208:35 am
PHX
- STL
1 stop8h 38m
Frontier
jue. 8/277:58 pm
STL
- PHX
1 stop5h 41m
Frontier
Deal found 7/27![Frontier logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
jue. 8/208:35 am
PHX
- STL
1 stop8h 38m
Frontier
lun. 8/247:58 pm
STL
- PHX
1 stop5h 41m
Frontier
Deal found 7/26![Frontier logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
sáb. 8/229:10 am
PHX
- STL
1 stop30h 12m
Frontier
lun. 8/247:58 pm
STL
- PHX
1 stop16h 13m
Frontier
Deal found 7/29![Frontier logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
lun. 8/248:35 am
PHX
- STL
1 stop8h 38m
Frontier
jue. 8/277:58 pm
STL
- PHX
1 stop5h 41m
Frontier
Deal found 7/28![Frontier logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
lun. 8/248:35 am
PHX
- STL
1 stop8h 38m
Frontier
lun. 8/317:58 pm
STL
- PHX
1 stop16h 13m
Frontier
Deal found 7/27![Frontier logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
lun. 8/248:35 am
PHX
- STL
1 stop8h 38m
Frontier
vie. 8/286:17 pm
STL
- PHX
1 stop26h 14m
Frontier
Deal found 7/28![Frontier logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
jue. 8/276:35 am
PHX
- STL
1 stop10h 38m
Frontier
lun. 8/317:58 pm
STL
- PHX
1 stop16h 13m
Frontier
Deal found 7/29![Frontier logo]()
$196
One-way flights from Sky Harbor Intl to St. CharlesSearch for one-way flight options from Sky Harbor Intl to St. Charles. Find affordable one-way fares based on user searches. Data last updated julio 30, 2026.
Search for one-way flight options from Sky Harbor Intl to St. Charles. Find affordable one-way fares based on user searches. Data last updated julio 30, 2026.
This Trip.com deal was found by Cheapflights users on 7/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/79:15 am
PHX
- STL
1 stop8h 02m
Frontier
Deal found 7/28![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
mar. 10/68:56 pm
PHX
- STL
1 stop20h 21m
Frontier
Deal found 7/28![Frontier logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
mar. 9/298:56 pm
PHX
- STL
1 stop20h 21m
Frontier
Deal found 7/29![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
mié. 8/264:48 pm
PHX
- STL
1 stop24h 25m
Frontier
Deal found 7/29![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
mié. 10/283:40 pm
PHX
- STL
1 stop25h 35m
Frontier
Deal found 7/29![Frontier logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
mié. 8/192:15 pm
PHX
- STL
1 stop26h 58m
Frontier
Deal found 7/29![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
lun. 8/314:40 pm
PHX
- STL
1 stop21h 51m
Frontier
Deal found 7/29![Frontier logo]()
$100
This Trip.com deal was found by Cheapflights users on 7/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/174:39 pm
PHX
- STL
1 stop21h 37m
Frontier
Deal found 7/29![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 7/25. 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.
mié. 9/99:15 am
PHX
- STL
1 stop8h 02m
Frontier
Deal found 7/25![Frontier logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
jue. 8/276:35 am
PHX
- STL
1 stop10h 38m
Frontier
Deal found 7/29![Frontier logo]()
$105
Find flight deals from Sky Harbor Intl to St. Charles
Keep the following information in mind while searching for Sky Harbor Intl to St. Charles flight deals. Data was last updated julio 30, 2026.
Round-trip from | $152 (Kiwi.com) |
|---|---|
One-way from | $77 (Trip.com) |
Popular in | June |
Cheapest in | October |
Average price | $402 |
Cheapflights Fare Finder
Customize your flight search to find flights from Sky Harbor Intl to St. Charles 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 julio 30, 2026.
Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to St. Charles that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
mié. 9/16
5:40 pm-10:40 pm
Nonstop3h 00m
Lambert-St Louis
mié. 9/23
5:35 am-9:55 am
1 stop6h 20m
$349
Quickest round-trip
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
sáb. 8/15
3:25 pm-8:20 pm
Nonstop2h 55m
Lambert-St Louis
mar. 8/18
8:45 pm-9:55 pm
Nonstop3h 10m
$353
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
jue. 8/27
7:25 am-12:20 pm
Nonstop2h 55m
Lambert-St Louis
lun. 8/31
6:00 am-7:15 am
Nonstop3h 15m
$353
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
jue. 9/3
6:55 pm-11:55 pm
Nonstop3h 00m
Lambert-St Louis
lun. 9/7
6:00 am-7:15 am
Nonstop3h 15m
$353
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
sáb. 9/19
5:25 pm-10:25 pm
Nonstop3h 00m
Lambert-St Louis
sáb. 9/26
11:50 am-1:00 pm
Nonstop3h 10m
$353
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
mar. 9/15
10:45 am-5:55 pm
1 stop5h 10m
Lambert-St Louis
sáb. 9/19
4:00 pm-5:15 pm
Nonstop3h 15m
$356
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
vie. 9/11
1:30 pm-6:20 pm
Nonstop2h 50m
Lambert-St Louis
sáb. 9/12
2:15 pm-3:30 pm
Nonstop3h 15m
$358
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
jue. 8/20
5:00 am-9:50 am
Nonstop2h 50m
Lambert-St Louis
lun. 8/24
2:20 pm-4:50 pm
1 stop4h 30m
$359
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
lun. 10/26
8:25 pm-1:15 am
Nonstop2h 50m
Lambert-St Louis
mar. 10/27
12:25 pm-4:40 pm
1 stop6h 15m
$363
PhoenixSt. Louis
PHX - STL
PHXSTL
Phoenix Sky Harbor Intl
sáb. 9/5
7:25 am-3:35 pm
2 stops6h 10m
Lambert-St Louis
mar. 9/8
2:45 pm-6:55 pm
2 stops6h 10m
$383
Showing 1-10 of 23 resultsSorted by cheapest first
Best time to book a flight from Sky Harbor Intl to St. Charles
Have a flexible travel schedule? Discover the best time to fly to St. Charles from Sky Harbor Intl with our price prediction graph.
PHX-STL
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 Phoenix Sky Harbor Intl Airport to St. Charles
PHX-CH5
PHX-STL
What is the cheapest time of day to fly from PHX to CH5?
Find hourly flight availability from Sky Harbor Intl to St. Charles. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 30, 2026.
When flying from Phoenix Sky Harbor Intl Airport to St. Charles, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 14% versus a flight at noon.
Weekly flight availability from Phoenix Sky Harbor Intl Airport to St. Charles
Explore weekly flight availability from Sky Harbor Intl to St. Charles. 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 julio 30, 2026.
The most flights from PHX to CH5 are scheduled on a Monday (9 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from Phoenix Sky Harbor Intl Airport to St. Charles?
Airfare is below average for this route at the moment.
Phoenix Sky Harbor Intl Airport to St. Charles flights typically cost between $302 and $425 in September.The cheapest round-trip price found within the last 5 days was $152 on Frontier (Sep 23-Oct 20).
What is the cheapest day to fly from Phoenix Sky Harbor Intl Airport to St. Charles?
Use this chart to determine the cheapest time to fly round-trip from Sky Harbor Intl to St. Charles. Price data was last updated on July 25, 2026.
Travelers seeking maximum savings on their Phoenix Sky Harbor Intl Airport to St. Charles flight should consider departing on Monday at noon 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 St. Charles
Get insights into the airlines that provide service to St. Charles. 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 St. Charles. Reviews last updated julio 30, 2026.
Read reviews from past customers who have flown Southwest,American Airlines, andFrontier from Phoenix Sky Harbor Intl Airport to St. Charles. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Related info for your journey
Find useful and relevant information for your journey from Sky Harbor Intl to St. Charles. 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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Sky Harbor Intl and St. Charles flights
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Top 4 airlines flying from Sky Harbor Intl to St. Charles
Discover the top 4 airlines that operate flights from Sky Harbor Intl to St. Charles. 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 julio 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$99 | Average$230 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$229 | Average$411 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$267 | Average$415 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$299 | Average$367 | FlexibilityNo cancel fee | On-time69% |